Jerk within the Context of Science and Engineering—A Systematic Review

: Rapid changes in forces and the resulting changes in acceleration, jerk and higher order derivatives can have undesired consequences beyond the effect of the forces themselves. Jerk can cause injuries in humans and racing animals and induce fatigue cracks in metals and other materials, which may ultimately lead to structure failures. This is a reason that it is used within standards for limits states. Examples of standards which use jerk include amusement rides and lifts. Despite its use in standards and many science and engineering applications, jerk is rarely discussed in university science and engineering textbooks and it remains a relatively unfamiliar concept even in engineering. This paper presents a literature review of the jerk and higher derivatives of displacement, from terminology and historical background to standards, measurements and current applications. investigation, H.H. and H.A.; resources, D.E..; data curation, H.H.; writing–original draft preparation, H.H. and H.A.; writing–review and editing, H.H., D.E., A.-M.P. and H.A.; visualization, H.H., D.E., A.-M.P. and H.A.; supervision, D.E.; project administration, H.H.; funding acquisition, D.E.

Displacement, velocity and acceleration are well known concepts for everyone who has studied physics at secondary level, whereas jerk-the time derivative of acceleration-and higher derivatives are rarely mentioned, let alone discussed, even in university physics or engineering textbooks. This omission was pointed out three decades ago by Sandin [20], who only found one reference to jerk [21] in a dozen reviewed text books. In addition, in an earlier article for university physics teachers [22], Schot presented the concept and also discussed the radial and tangential components of jerk. However, despite this early effort for jerk to be included in text books, jerk is not yet discussed in physics and engineering courses, except for a few textbooks [23][24][25]. The lack of detail in textbooks also contributes to some confusion concerning terminology.
Higher derivatives have been discussed by Thompson in a conference presentation [26], where he argued that since immediate acceleration onsets have a detrimental effect on equipment, acceleration should be ramped up by placing a limit on jerk. He then proposed an alternative strategy, claimed to be even better, which is ramping up jerk by placing a limit on its higher derivatives of snap, crackle and pop. However, the details of his studies are beyond the scope of this work.
Jerk and higher derivatives of acceleration are relevant for understanding the impact of motion and vibrations in a wide range of applications, as reviewed in this paper [1][2][3][4][5][6][7][8][9][10][11][12] The considerable interest is also reflected in the large number of downloads (>100,000) of a 2016 paper on jerk and higher derivatives [1].
To support secondary school teachers and university lecturers who would like to introduce the concept of jerk, as well as higher derivatives, in their science or engineering courses, we have conducted a thorough systematic review, from terminology and historical background to standards, measurements and current applications. The articles are divided, based on the applications of jerk, into twenty-one categories. Each article is ranked against where it is published using Scientific Journal Rankings (SJR)-Scimago index, from the quartiles Q1 to Q4, where Q1 is occupied by the top 25% of journals, Q2 by the top 25% to 50% and so on. We used N/A for thesis, reports, and conferences and journals where we were unable find any information with regards to their quality. Other sources are also included in the reference list. The rationale for including these sources is the scarcity of research on jerk. It is then the responsibility of the reader to evaluate the articles against their own objective. A number of papers have been included which use the concept of jerk, even if they don't explicitly mention the term or only refer to it briefly.

Background
There is a limited number of good textbooks about the history of mechanics. The best are probably Szabo [196] (in German) and Dugas [197] (in French and translated into English [198]). Although these books contain a lot of interesting information, neither covers jerk or higher derivatives.
Newton's second law of motion is commonly written as F = ma, i.e., "force equals mass times acceleration", although Newton did not use the term acceleration in his equations but stated that the rate of change in momentum is equal to the applied force. The concept of acceleration was formalized by Pierre Varignon (1654-1722) [199]. Before the second world war German engineers, including Melchior [200] and Schlobach [201], pointed at applications of jerk for handheld machines.
One aspect that is frequently overlooked is terminology. By standardizing terminology, misunderstandings could be avoided, communication between scientists from different disciplines could be enabled, and searches on the global network would be facilitated. The term "jerk" for the first derivative of acceleration seems to be most widely used. However, alternative terms like "acceleration onset rate" are also used, e.g., Whinnery et al. [202], ISO 2041 [13] and a report by NASA [94].
The higher derivatives are less familiar, and different terminologies have been used by different groups. The term "jounce" is sometimes used to describe the fourth derivative of position, and in some Japanese articles it is referred to as "jerk-dot" [148,173,175].
In this work, we will use the more common terms "snap", "crackle" and "pop" for the 4th-6th derivatives (named after pictorial characters on Kellogs' Corn Flakes packages from the thirties). For the 7th-10th derivatives, the terms "lock", "drop", "shock" and "put" have been proposed informally, although we have been unable to find them in the literature.

Method
Articles in the period from 2015 to 2020 with the term "jerk" mentioned in the title were looked up in an electronic database (Scholar.google.com), excluding citations and patents. There were 550 results. The initial 550 articles was refined by excluding 129 based on title, non-English language and duplication. Of the remaining 421 articles, 147 articles were excluded in a more detailed subsequent assessment that included a review of the abstracts and conclusions, and their source, i.e., low-quality journals/conferences. Of the remaining 274 remaining articles, 139 articles that referred to jerk in the context of chaotic systems and nonlinear dynamics were excluded. Terms signaling this context include jerk system, hyper-jerk system, chaotic jerk-system, jerk attractors, jerk circuit, jerk dynamics, jerk map, jerk function, jerk oscillators and jerk equations, and traffic jerk model (n = 17) articles that used jerk in the context of weightlifting were removed, since this refers to a weightlifting technique rather than the jerk itself.
In addition to the articles emerging from this database search, the authors were aware of 84 articles before 2015, as well as articles where jerk was not mentioned in the title. These articles have been included in the review. The inclusion-exclusion criteria flow chart is given in Figure 1. After reviewing the collected literature (n = 202) and those articles that the author were aware of, the applications of jerk were categorised into 20 categories.

Categorisation of Jerk Applications
The 21 jerk categories chosen with their respective references were: 1. Jerk in advanced manufacturing ; The next section presents brief summaries of the papers in the different categories.

Jerk in Industrial Robots
Jerk is mainly used to generate smooth trajectories in industrial robots (also referred to as manipulators) . It is outside the scope and purpose of this paper to explain the jerk-controller. Details (author, source, SJR ranking and the title) of the Q1 articles are tabulated in Table 1.
As mentioned above, all of the cited reference used jerk as a limit for generating or controlling a smooth motion.

Jerk in 3D Printers
In recent years, jerk has been used in 3D printers [84][85][86][87][88][89][90]. One important consideration in 3D printing is that the term jerk, in the majority of 3D firmware, is defined in terms of the maximum "instantaneous" velocity change without consideration of the time required [84,90].
Inconsistent terminology causes confusion and needs to be addressed in the future. Notwithstanding, in an article on 3D printing by Hernandez [86], the actual jerk was considered (see Table 2).

Q4
To analyse factors which affect the dimensional precision of consumer 3D printing. The jerk was believed to play an insignificant role in printing quality but it was observed that a single instant of apparent error due to jerk could be accounted for, and should be considered by changing the the way infill was applied.
The maximum jerk is an input parameter that can be set by the user to control the dimensional precision of 3D print and have a cleaner print as a result. Table 3. Jerk in machining.

Q1
Generating a smooth curve, mainly at junctions, in computer numerical control (CNC) machining is a challenge. In this work, a new algorithm, which is claimed to have a jerk-smooth trajectory controller, is proposed.
Jerk as a measure to generate smooth and accurate trajectories.

Schroedter (2018) [74]
Mechatronics Q1 A flatness-based feed forward control method using jerk-limited trajectories, which is based on a mechatronic micro mirror model, is proposed to reduce undesired oscillations in micro-scanners.
Jerk as a measure to generate smooth and accurate trajectories.
Dumanli (2018) [68] Precision Engineering Q1 Obtaining a smooth surface manufactured in a timely manner is a challenge in different industries, and, therefore, different smooth-trajectory controllers have been developed. In this study, a novel jerk value decision-making process is proposed for the parts-machining process.
Jerk as a measure to generate smooth and accurate trajectories.

Q1
Current machine tool controllers cannot fully benefit from the speed of the drilling laser as they are not equipped with a proper trajectory function. In this work, a time-optimal and minimum jerk trajectory generator is designed and implemented on a gas turbine combustion chamber. The results showed 6% time-reduction as well as reduced oscillation due to controlled jerk.
Jerk as a measure to generate smooth and accurate trajectories.

Q1
A novel jerk-minimised trajectory controller for multi-axis flank CNC machining is developed in this work.
Jerk as a measure to generate smooth and accurate trajectories. The International Journal of Advanced Manufacturing Technology N/A Corner smooth machining in high speed machining causes issues in advanced manufacturing. Current solution is based on the jerk-limited acceleration profile from the perspective of kinematics that generate continuous acceleration transition profiles. They offer the same approach but for a higher derivative of jerk (jounce).
They used Jerk onset (jounce) for smoothing algorithm for the corner motion in high speed machining.

Jerk in Amusement Rides
Jerk is rarely mentioned in textbooks but is quite an important physical parameter, as we quite often experience it in daily life. One important aspect of jerk is that jerk is an element in the comfort and safety of amusement rides, as well as reducing the need for equipment maintenance (Table 5).

Jerk in Cosmology and Space Technology
Jerk is used in cosmology as well as space technology. Details of articles which were eligible based on the inclusion criteria of the current work are given in Table 6.
The Dutch institutes TNO and MARIN have initiated a joint project to study the impact of jerk on the comfort of passengers in a master thesis conducted by Werkman [10]. Details of this work are given in Section 3.4.2 of this paper.
Förstberg [104] investigated ride comfort and motion sickness in trains. The results indicated that "it is motion dose from horizontal jerk or horizontal acceleration as well as roll acceleration or roll velocity that is the primary causes of provocation." Unfortunately, Förstberg passed away shortly after presenting his thesis.
Svensson and Ericsson [123] referred to concrete jerk values from American Association of State Highway and Transportation Official Standards (AASHTO; 2001) [206] in their master thesis. A value of lateral jerk ranging from 0.03 to 0.09 g/s has been used for highway design. Jia [25] claims that the jerk should be below 0.2 g/s in trains for passenger comfort. Martin and Litwhiler [118] investigated acceleration and jerk profiles in the metro-rail system in Washington DC and found jerk peaks of around 1.3 g/s.
Minimising the discomfort experienced during a journey between two points with the fixed travel time was studied by Anderson et al. [96]. They proposed jerk as a discomfort criteria. Their work was then revisited by Antonelli and Klotz [97] and Lemos [116] one and three years later, respectively. The jerk is proposed as a discomfort criteria. Antonelli and Klotz (2017) [97] and Lemos (2019) [116], commented on this work and mentioned that the integral of the square of acceleration and the integral of square of jerk should be considered as criteria for discomfort.

Jerk in Ride Comfort: Amusement Rides
Jerk is used as a ride comfort measure in amusement rides [1,4,5]. Details of studies mentioning jerk as a ride comfort parameter in amusement rides are given in Section 3.2, Table 5.

Jerk in Ride Comfort: Sea-Keeping
Jerk is used a ride comfort measure in sea-keeping [9,10,122,126]. Details of these studies are given in below Table 7.

Source SJR Purpose and Findings Comments
Masoudi (2016) [82] IET Electric Power Applications Q1 Although the linear switched reluctance motors (LSRMs) have many benefits such as being low cost, and having a comparatively high force-to-mass ratio and no need for mechanical rotary to linear motion, as converters, they have limited application because of their force ripple. To control this force ripple, a new control model based on a minimum jerk model is proposed, which can be used in elevator applications.
A controller based on a minimum jerk model for LSRM motors.
Jinhui (2017) [80] Mechatronics Q1 A minimum jerk trajectory controller to enhance the smoothness and stability of a rotor motor is developed in this work.
Jerk as a measure to generate smooth trajectories. Physics Education Q3 Although textbook loops are often circular, real roller coaster loops are not. This paper looks into the mathematical description of various possible loop shapes, as well as their riding properties.
Jerk is mentioned indirectly, in the context of using clothoid curves for roller coaster loops.

Q2
The concept of jerk is discussed using trampoline and amusement rides (roller coasters). The effect of jerk on human body is also discussed. The importance of jerk in amusement rides (roller coasters): safety (avoiding whiplash); ride comfort; when the safety of the passenger is not an issue, reducing the maintenance cost due to snap.
Jerk is important and is experienced in daily life, yet is not well-explained and understood.

Sicat et al. (2018) [4]
Proceedings for the Annual Occupational Ergonomics and Safety Conference N/A The design and validation protocol for wearable sensor technology used to collect acceleration and g-force exposure of a zip line rider is studied in this work.
They have briefly mentioned the importance of jerk (referred to it as rate of change of acceleration) in the ride comfort and safety of the passengers. Refers to Eager et al [1].

Source SJR Purpose and Findings Comments
Väisänen (2018) [5] Master thesis N/A A literature review to present general guidelines and principles of what is included in the design and engineering of roller coasters and other guest functions attached to them.
They have briefly mentioned jerk as a limit which may become standardized in future, since it affects the ride comfort and experience.

Pendrill et al. (2019) [6]
Physics Education Q3 Assessed the first-year university understanding of the vertical motion on a roller coaster loop. It was found that students have partial conceptions about force and motion and contradictions in their responses and do not have a good understanding of abrupt changes in jerk.
The importance of including jerk in physics textbooks.

Pendrill et al. (2020) [7]
Physics Education Q3 The effect of acceleration, jerk, snap and vibration on the ride comfort experience and safety of roller coaster rides is analysed in this work, via authentic data from a dive coaster as an example.
Jerk and snap are considered as ride comfort criteria in amusement rides. NASA technical report N/A In an article entitled "Three axis control of the Hubble Space Telescope using two reaction wheels and magnetic torquer bars for science observations", jerk has been used as a measure in maneuver planning.
They considered maximum jerk as they investigated possibilities for three-axis control if two of the four reaction wheels should fail .
STD, NASA . (2011) [94] NASA technical report N/A Human-system standard. "The system shall limit crew exposure to acceleration rates of change larger than 500 g/s during any sustained (>0.5 s ) acceleration event." 'Acceleration onset' or 'acceleration rate of change' is mentioned, but not jerk explicitly.
Ramon (2016) [93] Master thesis N/A The touchdown dynamics of a lander was simulated. Jerk was a parameter in designing a honeycomb damper, which aimed to dampen the impact forces associated with touchdown dynamics of the lander.
Considered jerk in the analysis of touchdown dynamics of a lander in a masters' project. Table 7. Jerk as a criteria for discomfort: sea-keeping.

Source SJR Purpose and Findings Comments
Tomi (1961) [126] The Japan Society of Naval Architects and Ocean Engineering N/A Ride comfort of passengers on ships were studied. The influence of jerk on the rolling motion was discovered.
One of the first references considered jerk in ride comfort in sea-keeping. Jerk is referred to as the time derivative of acceleration.

Shigehiro et al. (2002) [122]
Fisheries science Q3 The new evaluation method of passenger comfort is expressed by vertical and lateral accelerations and exposure duration represents the relationship between ship motions and seasickness. It is confirmed that the correlation coefficient between the results of the new method and the questionnaires given to the trainees show fairly similar results.
Jerk is not directly mentioned. Only the work conducted by Tomi [126] was briefly mentioned.
Sosa & Ooms (2016) [9] Report N/A The role of the roll stabiliser in the ride comfort in the yacht industry is analysed. Jerk is mentioned as a ride comfort parameter but was not included in the ride comfort rating used in this study.
Since it is seen in the literature that jerk is an important parameter in this respect, further research in including jerk in the yacht ride comfort rating is critical.
Points to the need for more studies of the effect of jerk in the yacht industry.
Werkman (2019) [10] Master thesis N/A To study the impact of jerk on comfort of passengers in sea-keeping. Points to the need for more studies of the effect of jerk. Importance of jerk in sea-keeping and ride comfort in general.

Jerk in Equation of Motion (EOM)
Jerk is proposed to be used in the EOM, and details of studies explored this can be found in Table 9. The idea has been discussed earlier but, to date, no concrete examples where someone claims that adding higher-order derivatives might explain the discrepancies between theory and observations, have been seen.

Jerk in GPS Applications
The following articles discussed use of jerk in Global Positioning Systems (GPS), mainly those types that should perform in harsh dynamic conditions such as satellite launch vehicles (Table 10).

Jerk in Human Tolerance
Details of works studying human tolerance to jerk are given in Table 11.
Recently, jerk has gained interest in non-clinical trials. For instance, in a recent study by Zhang [145][146][147], jerk was used as a measure to detect fatigue in workers.

Jerk in Measurement
Jerk is normally measured indirectly by calculating the derivative of acceleration, which is measured by accelerometers. Below, those studies that developed a device to measure jerk are tabulated (Table 13).

Jerk in Motion Analysis
In motion analysis application, jerk is used as s measure in machine learning classifiers [152,153] (Table 14).

Jerk in Ornithology
Ornithology is a branch of zoology which deals with birds. jerk has been used in one of the recent studies in this area, details of which are given in Table 15.

Jerk in Greyhound Racing
One of the interesting applications (refer to Table 16) of jerk is in high-speed sprint racing, such as greyhound racing. Recent articles on racing greyhounds, mainly the one in Nature's Scientific Report [160], clearly show its importance.

Jerk in Sea-Keeping
Jerk in sea-keeping is considered in both passengers' ride comfort and analysing shock spectrum in high-speed crafts [8][9][10]122,126,204] (Table 17). The frequency characteristics of vehicle motion are studied to derive the inherent jerk. A new method is proposed, which, unlike the conventional method that uses the peak of jerk as a performance index, can differentiate the perceivable frequencies from the test data and quantify the actual jerk.
A new method to obtain inherent jerk was proposed. A new low-jerk suspension control system by mixing skyhook (SH), acceleration-driven-damper (ADD) is proposed in this work. The characteristics of the SH-ADD suspension system are compared both numerically and experimentally with other suspension control system.
Jerk is as a measure in designing suspension systems. Perspectives in Science

Q2
Since the ride comfort of the passengers on vehicles is of paramount importance, a mechanical model of a train subjected to external loads (rolling and longitudinal wheel resistance, and gravity) is considered. The jerk value are measured and analysed.
Jerk is considered as a criterion of discomfort in this work.  [12] journal of Electronics Q3 To provide a comfortable driving experience, while not sabotaging the passengers' safety, on a self-driving shuttle bus. A time-optimal velocity planning method to guarantee a comfort criteria was developed. A better performance and comfortable passenger ride in a self-driving shuttle bus is experienced.
This is also aligned with the application of jerk in ride comfort and its potential to be considered in autonomous cars. A backlash based controller to reduce the jerk, while clutch is engaged in a hybrid car, is designed and numerically compared with other controllers. In this method, the magnitude of the shock is quantitatively evaluated against jerk to minimise the discomfort felt by the passengers.
Jerk as a measure to control the backlash caused by clutch engagement in hybrid cars.

Q2
Longitudinal jerk and acceleration were considered as a measure of safety of the bus rapid transit buses. The results of this study can be used to predict dangerous driving style before severe accidents occur.
Longitudinal jerk can be used as a measure to identify dangerous driving styles. Since jerk is a criteria for discomfort, it was measured both experimentally and numerically (simulation) for a vehicle through a low-cost Bluetooth sensor among other variables such as acceleration.
Jerk as measure of discomfort in vehicles dynamics. N/A A modeling method and a control system design procedure for a flexible rotor with many elastic modes using active magnetic bearings is presented. A local jerk feedback control system and stability analysis is developed by using root locus.
It has been proposed to include "jerk feedback" for rotors suspended in active magnetic bearings. In that case, jerk will occur in the EOM.
Eager (2018) [136] Proceedings of ACOUSTICS N/A A novel way of measuring jerk, snap and crackle using accelerometers (while jumping on trampoline). The EOM of this dynamic is obtained where jerk appears in the EOM.
Jerk has appeared in the obtained EOM of jumping on a trampoline. Jerk as a test parameter in testing GPS used in satellite launch vehicles. Table 11. Jerk in human tolerance.

Source SJR Purpose and Findings Comments
McKenney (1970) [203] Report N/A A literature review to study the human tolerance to abrupt acceleration. Just as the slope of a velocity-time trace furnishes acceleration, so the slope, or tangent, of an acceleration-time pulse will yield rates of change in acceleration. They have studied higher rates of onset, meaning jerk, snap, etc., and mentioned in chapter 4 of the work that change of rate of acceleration is also called jerk.
A method to calculate jerk as the slope of the acceleration-time pulse plots was proposed.
Whinnery et al. [202] Extreme physiology medicine Q4 They referred to jerk as acceleration onset. This concussion curve provides a temporal prediction of when the concussion might occur. Jerk was referred to as acceleration onset rate.
The jerk loss of concussion curve was studied. To evaluate the accelerometric parameters of human gait patterns in different neurological conditions with pathological gait impairment compared to healthy subjects. The acceleration and jerk data were used to compare different groups. Analyses of the basic accelerometric parameters associated with a jerk analysis could assist in differentiating between the population groups.
The use of P-value is currently heavily debated, see, e.g., The ASA Statement ( [207]) on P-values. However, this work draws attention to using jerk in gait analysis.
Lapinski (2013) [140] PhD thesis N/A In this PhD thesis titled A platform for high-speed bio-mechanical analysis using wearable wireless sensors, it is shown that jerk was a good monitor of a baseball pitcher's likelihood of tearing a tendon, while other parameters such as peak acceleration could not show this.
Jerk has the potential to monitor different injury scenarios or dynamics which other parameters such as peak acceleration are unable to detect.

Q1
In more recent times Zhang et al. [142] used jerk as an indicator of physical exertion and fatigue within the construction industry. They monitored the activity of a bricklayer using an inertial measurement device device that allowed jerk to be calculated.
Jerk as a measure to detect fatigue.

Q1
To determine the influence of pelvis and torso angular jerk on the hand velocity, which is a hitting performance indicator in female softball. Although the results did not show a significant relationship between pelvis and torso angular jerk and hand velocity, more research could be conducted on the "timing" of minimal jerk through the acceleration phase to predict the angular hand velocity.
Jerk, both its magnitude and duration, should be studied more in sport science.  [149] Patent N/A A method and apparatus for measurement of the derivative of acceleration with respect to time (jerk) and the use of demodulation to analyze the jerk signal.
The sensor used to measure jerk consists of a piezoelectric transducer coupled with an amplifier that produces a voltage or current signal that is proportional to jerk. In applications including rolling element bearing diagnostics, demodulation is used to measure changes in the jerk signal over time.
A patent containing information of a sensor to measure jerk.

Source SJR Purpose and Findings Comments
Thompson (2012) [152] Jyväskylä studies in humanities N/A Motion capture techniques were used to study music cognition, in which Jerk is used a measure in machine learning classifiers.
Jerk is considered in the embodied music cognition research.
Jongejan (2017) [153] Proceedings of the 4th European and 7th Nordic Symposium on Multimodal Communication N/A Jerk is used a a measure for support vector machine classifier, used for classifying head movements, along with other measures of velocity and acceleration.
Jerk as a measure for machine learning classifiers in motion analysis application.

Source SJR Purpose and Finding Comments
Sharker et al.
(2019) [154] Bio-inspiration biometrics Q1 To see why plunge diver birds can dive into water with high speed while surface bird divers cannot and to see if there is a correlation between this fact and physical geometry, mainly of the beak. Since real experiments could not be conducted, they used a 3D-printed model of three types of diving birds with an embedded accelerometer. Surface diving birds have high non-dimensional jerk (J * = (∆a∆t)[m/(ρgvA)]), which is higher than the recommended safe jerk limit (for humans/no data for birds).
The impact acceleration of the bird models were not distinguishable while the jerk value was quite different. This draws attention to the fact that some dynamical behaviour scenarios cannot be fully captured by acceleration and jerk should be considered in such scenarios.  [155] Report N/A The jerk was calculated from race track survey plans to identify thresholds for a safe turn in racing greyhounds.
Jerk is studied as a safety threshold in greyhound racing track bend design. Scientific Reports Q1 Designing a racing greyhound ideal trajectory path to minimise the injuries. This ideal trajectory path is based on minimum jerk rate.
Confirms the significance of jerk in racing.  [8] Report N/A The aim of this work was to provide a universal guidance for the measurement and analysis of recorded acceleration data in high-speed crafts for different organisation. Four visual observations to conclude that acceptable low-pass filtering of an acceleration record has been achieved were proposed (i.e., no over-filtering). One of the proposed observations was that the rate of acceleration application (i.e., jerk) of the filtered record is approximately the same as the unfiltered record.
The value of jerk was used to assess the accountability of filter acceleration data using a low pass filter.
Sosa & Ooms (2016) [9] Report N/A The role of roll stabiliser in the ride comfort in the yacht industry is analysed. Jerk is mentioned as a ride comfort parameter but was not included in the ride comfort rating used in this study. Since it is seen in the literature that jerk is an important parameter in this respected, further research in including jerk in the yacht ride comfort rating is critical.
Points at the need for more studies of the effect of jerk in yacht industry.
Coats & Riley (2018) [204] Naval Surface Warfare Center technical report N/A The preliminary guidance for laboratory testing of marine shock isolation seats is given in this report. Jerk was among those parameters considered in the shock severity analysis.
The importance of jerk in the shock severity analysis in high-speed craft.
Werkman (2019) [10] Master thesis N/A To study the impact of jerk on comfort of passengers in sea-keeping. Points at the need for more studies of the effect of jerk. Importance of jerk in sea keeping and ride comfort in general.

Jerk in Seismic Analysis
Seismic analysis is a subset of structural analysis and is the calculation of the response of a building structure to earthquakes. It is part of the process of structural design, earthquake engineering or structural assessment and retrofit in regions where earthquakes are prevalent [134,[161][162][163][164][165][166][167][168][169][170] (Table 18).

Jerk in Shock Response Spectrum
Equipment that is delivered to naval ships needs to be shockproof. The basic philosophy is that the equipment should withstand the same explosions as the ship itself (it would be unfortunate if the ship survived the blast, while it were impossible to operate since all equipment has been destroyed). Preferably, the shock-proofness of the equipment should be verified both theoretically and experimentally.
There are essentially three methods for theoretical verification, including: • Static calculation, where you assume inertia forces of the mass times g in various directions; • Calculation with shock response spectrum; • Integration in the time domain.
Static calculations are easiest to carry out. In these calculations, neither the shape of the time history of the shock (e.g., blast or earthquake) nor the dynamic properties of the equipment under consideration (e.g., resonance frequencies) are taken into account. This means that you should normally have a considerable safety margin. The shock response spectrum was invented by the Flemish-American engineer Maurice Anthony Binot . The basic idea is to draw a diagram that shows the maximum acceleration and relative displacement for a number of single-mass oscillators with various eigen frequencies for a certain shock time history. Normally, a simplified curve is drawn that might be an envelope for several time histories. This curve can be used to calculate the maximum amplitude for each eigenmode of the real equipment, and finally the contributions of each eigenmode can be added. There are different ways to add the contributions from the eigenmodes depending on how cautious you are. The very conservative approach is that you assume that, at some point in time, all the contributions of the eigenmodes are pointing in the same direction. This curve can not be used for testing, so a new time history curve has to be synthesised as input to that activity. It is out of the scope of this article to discuss details of this method, but it is interesting to point out that in these calculations jerk, etc., are implicitly taken into account.
The most straightforward method to carry out shock calculations is by integration in the time domain. Since the calculations are based on the time history, the derivatives of the acceleration are implicitly taken into account. The time history can, of course, directly be used as input to the test activity and comparison between calculations and measurements should be straightforward. The main drawback of this method is that it consumes a lot of computer power.
Studies that studied jerk in shock responses are listed in Table 19.

Jerk in Sport Science
Sport science is a general term which can include the science behind designing running shoes and studying the impact attenuation properties of greyhound's surface. Those articles that passed the inclusion criteria of this work are tabulated in Table 20.

Jerk in Structural Health Monitoring
Vibration monitoring is another challenging area, e.g., it would be beneficial to be able to be able to identify the wear on gearboxes of wind power stations in due time. However, the application of higher-order derivatives of acceleration for damage detection requires further investigation. Using jerk as one parameter to be monitored has been suggested, e.g., by Zhang et al. (2012) [174] (Table 21).  [161] Master thesis N/A To predict the seismic design response spectra using ground characteristics. A single-degrees-of-freedom (SDOF) is used to study the ground motion characteristics, such as as peak displacement, velocity, acceleration and root mean square acceleration. The average value of the ratio of the maximum jerk to the maximum ground acceleration and maximum ground velocity to the maximum ground displacement are given. These values are required when the prediction of the relative velocity spectra from the pseudo velocity spectra is of interest.
Jerk is briefly mentioned in this work.

Q1
An optimum hybrid isolation system to protect sensitive equipment from earthquake was designed and the EOM of the ground motion obtained. Jerk was a parameter in the ground motion EOM.
Jerk was mentioned in the model of of ground motion, which was numerically modeled.

Bertero et al. (2002) [162]
Earthquake engineering structural dynamics Q1 Different objectives were given for this work but one of the main objective was to review the understanding of performance-based-seismic-design (PBSD), the requirements for a reliable PBSD, and finally to study why some designs fail to satisfy those requirement. Jerk was mentioned as a useful parameter which should be taken into consideration for such designs, mainly in the case of frequent minor earthquake ground motions.
Jerk is mentioned as a useful parameter for reliable PBSD design, mainly in the case of frequent minor earthquake ground motion.

Q1
To regulate the total structural jerk to manage the structural energy and enhancing the performance of civil structures undergoing large seismic events. This new method used in this work is preferred over conventional methods. Their proposed jerk regulation control method is shown to have better performance than typical structural control methods for near-field seismic events where the response is dominated by a large impulse.
Importance of jerk in seismic control of a civil structure which has benefits over the conventional method. The importance of jerk in seismic motion analysis is not extensively studied. Therefore, they studied the basic characteristics of time derivatives of acceleration (TdoA) on records from the 1999 Chi-Chi, earthquake (Mw 7.6) and one of its aftershocks (Mw 6.2).
Highlighted the importance of jerk (referred to it as TDoA) is seismic motion analysis.  [165] Shock and Vibration Q2 Jerk and its response spectra can improve the recognition of non-stationary ground motion. Therefore, in this work, the jerk response spectra for elastic and in-elastic system are characterised.
It is mentioned that though jerk is an important characteristic of ground motion, it is not thoroughly studied in seismic motion analysis.

Q2
To study the energy transfer to a high-frequency mode of a building due to a sudden change in stiffness at its base during seismic excitation. Jerk was used to excite the structure.
Jerk is used for exciting the structure due to the fact that it is one of the characteristics of ground motion. Taushanov (2018) [167] Journal of Engineering Mechanics N/A Excessive "jerky motion" affects comfort in building and bridges, and therefore attempts to reduce this phenomenon should be taken into consideration in engineering design. A jerk response spectra is given, which should be considered in seismic analysis of a structure.
Jerk spectra features is studied for elastic and in-elastic systems.

Q1
To extract/study the general feature of jerk spectera for different seismic motion scenarios. They used this method for in-elastic SDOF systems. An empirical formula that provides jerk estimate for in-elastic SDOF system is proposed for the first time in the literature (by the Bilinear, the Ramberg-Osgood and the Takeda hysteresis rules).
This shows the importance of jerk in earthquake engineering.
Yaseen et al.
(2020 [169] Soil Dynamics Earthquake Engineering N/A The performance of jerk and its higher derivatives (referred to as relevant derived parameters) to address the ground motion intensity in masonry building was studied.
Jerk was used as an intensity measure in Seismic analysis of masonry buildings.  [8] Report N/A The aim of this work was to provide a universal guidance for measurement and analysis of recorded acceleration data in high-speed crafts for different organisation. Four visual observations to conclude that acceptable low-pass filtering of an acceleration record has been achieved were proposed (i.e., no over-filtering). One of the proposed observations was that the jerk of the filtered record is approximately the same as the unfiltered record.
The value of jerk was used to assess the accountability of filter acceleration data using a low pass filter. [205] Report N/A This report characterizes the shock severity in the response domain, so that the effects of shock pulse shape, peak amplitude, jerk, and pulse duration can be taken into account for systems across a broad range of natural frequencies.
It is mentioned that it might be useful to include jerk in shock investigations. Table 20. Jerk in sport science.

Author Source SJR Purpose and Findings Comments
Savage [171] Report N/A Although different types are running shoes have been designed, they seemed not to be based on the current science on injury prevention. Different types of shoe design and injury mechanisms were discussed in this report. It is mentioned that the importance of jerk should be considered in reducing the impact injuries while running.
It might be worthwhile to study the impact of jerk in designing running shoes.

Q2
The concept of jerk is discussed using trampoline and amusement rides (roller coasters). The effect of jerk on the human body is also discussed. The importance of jerk in amusement rides (roller coasters) for safety (avoiding whiplash), ride comfort, and when the safety of the passenger is not an issue reducing the maintenance cost due to snap.
Jerk is important and is experienced in daily life, yet it is not well-explained and understood.
Hayati et al. (2019) [172] World Engineers Convention 2019 N/A A modified Clegg hammer was used to assess the safety of greyhound's race track sand and grass surfaces. The maximum acceleration, the impact duration, the energy loss and the maximum jerk, were considered as dynamic parameters that determine the safety of the race track surface.
Jerk is considered as a dynamic parameter to assess the safety of the greyhound race track surfaces. Fault diagnosis of wind turbine gear was investigated in this work. They proposed a novel method of analysing the stability of Interacting Multiple Model (IMM) algorithm for a linear system (the details of this methodare out of scope of this review article.) They mentioned that analysing jerk data coming from the vibration of acceleration data via the IMM Kalman filter is a novel endeavor to the best of their knowledge.
Jerk can be used in health monitoring of dynamical system.

Jerk in Technical Pain
Jerk was used to expand the understanding of researcher of sensed pain via a pain sensor where jerk was used as a biometric measure (Table 22).

Jerk in Vehicles: Ride Comfort
One of the main applications of jerk in vehicles is as criteria for discomfort. Details of these studies were given in Table 7.

Jerk in Vehicles: Autonomous Vehicles
Jerk in autonomous driving is used to evaluate the comfortable ride and safety of the passengers [12,114,123,187,188] (Table 24). Applied Mechanics and Materials N/A The concept of technical pain, which is based on the analysis of mesoscopic systems, was introduced in this work. The system was modeled as damped oscillators and the heat transferred by an impact. Pain was defined as an integral over the square of jerk. They developed a pain sensor and used it to analyse the pain caused by different types of signals.
Jerk used to obtain a measure of pain and used in the development of a pain sensor. N/A Use of jerk (referred to as lurch index) to assess the drone's attitude fluency maneuverability. It is found that the geometric lurch index is fairly sensitive to the fluency of attitude maneuvering.
Uses the term "lurch index".  [185] Unmanned Systems Q2 Controlling drones in a high-wind scenario and during thrust was a challenge in this study. Accordingly, a jerk-minimum trajectory controller was developed to optimise the motion.
Jerk as a limiting parameter in trajectory controllers.
Guye (2018) [179] Masters thesis N/A An Indoor multi-rotor test-bed for experimentation on autonomous guidance strategies is developed. It is found that the jerk would minimize the product of the control inputs, which are the major force that consume the power energy of the drone. Consequently, minimizing these control inputs will also reduce the power consumption. As a result, minimising the jerk results in minimising the power consumption.
Use of jerk in designing a test bed for a drone. Since jerk minimisation minimises the energy consumption, it should be considered in drone designs and controlling. Jerk as a measure to generate trajectories.
Tal & Karaman (2018) [186] 2018 IEEE Conference on Decision and Control N/A Tracking of aggressive (high-speed and high-acceleration) quadrotor trajectories. The main contribution of this work is a trajectory tracking control design that achieves accurate tracking aggressive maneuvers without depending on modeling or estimation of aerodynamic drag parameters. The design exploits the differential flatness of the quadcopter dynamics to generate feed-forward control terms based on the reference trajectory and its derivatives up to the fourth order: velocity, acceleration, jerk, and snap.
Use of jerk in controlling a drone. Not only jerk, but also snap (jounce), may be relevant in the design and controlling of the drone. To have a safe flying corridor, jerk limit ted trajectories were used in real-time scenarios.
Jerk as a limiting parameter in trajectory controllers.  [12] journal of Electronics

Q3
To provide a comfortable driving experience, while not sabotaging the passengers' safety on a self-driving shuttle bus, a time-optimal velocity planning method to guarantee a comfort criteria was developed. A better performance and comfortable passenger ride in the self-driving shuttle bus is experienced.
This is also aligned with the application of jerk in ride comfort and its potential to be considered in autonomous cars.
Krüger (2019) [114] Master thesis N/A To implement and evaluate a motion planner to find a rough speed profile in autonomous cars. The value of jerk was considered as passengers' ride comfort and safety measures.
Points at the importance of low-jerk trajectories to guarantee passenger's safety and ride comfort.

Conclusions
The purpose of this work was to show the importance of jerk in the context of science and engineering, by conducting a thorough systematic review of recent academic articles (2015-2020) where the term 'jerk' was mentioned in the title. The quality of papers was assessed based on Scientific Journal Rankings (SJR)-Scimago index, from the quartiles Q1 to Q4, where Q1 is occupied by the top 25% of journals, Q2 by the top 25% to 50%, and so on. The articles were then categorised based on the application of jerk in twenty categories. The result of this systematic review showed that, although jerk is overlooked in secondary and higher education, jerk is ubiquitous. Road, rail and sea all have examples of a jerk, from crack initiation to ride comfort. Traditional printing and 3D-printing control systems all contain examples of a jerk. This review has provided a solid foundation for future research on the importance of jerk in different fields. It has identified research gaps which will assist researchers in creating a concise road map toward a more comprehensive study on jerk. The authors also emphasize that jerk is still essentially overlooked in secondary and higher education. This review provides support for teachers and textbook authors who may wish to include examples of jerk in their lessons and textbooks.
Jerk is all around as if we care to listen, feel, open our eyes and observe-from greyhound tracks to roller coasters. Funding: The work is funded by Greyhound Racing New South Wales with UTS institution reference of PRO17-3051.

Conflicts of Interest:
The authors declare no conflict of interest.