Review on Development of High-Static–Low-Dynamic-Stiffness Seat Cushion Mattress for Vibration Control of Seating Suspension System
Abstract
:1. Introduction
2. Passive Vibration Isolation Designs
3. Identified Research Gaps, Issues, and New Directions
3.1. Research Gaps and New Directions
3.2. Research Questions
3.3. Aim of the Research
4. Our Current Work and Contributions
5. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Type of Structure | Geometry | Key Features and Novelty | Advantage | Disadvantage | Performance Criterion | Performance |
---|---|---|---|---|---|---|
(6-DOF) X-shaped support legs quasi-zero-stiffness (QZS) Stewart platform isolator [38] | | (1) Three layers; (2) Each layer consists of connecting rods and corresponding rotating joints. (3) Support joints of the left bottom and top layer sliding along horizontal tracks. (4) Additional springs for extra stiffness. (5) High-static–low-dynamic stiffness (6) Double-diamond isolator structure in place of X-shape structure. | (1) A very flexible and versatile scissor-like structure. (2) It can be independent of or combined with other vibration isolators, to provide damping and stiffness as the passive or semi-active isolator. (3) Flexible structure size for different application situations. (4) Good vibration isolation performance. | (1) Complex structure and many components. | Displacement transmissibility Equivalent stiffness | The peak values of the transmissibility ratios of the mass-spring-damper vibration isolator (MSD-VI), scissor-like structure vibration isolator (SLS-VI), and quasi-zero-stiffness vibration isolator (QZS-VI) are 20, 8, and 4, respectively |
(6-DOF) Stewart platform with high-static–low-dynamic stiffness (HSLDS) passive vibration isolator [60] | | (1) Both the inner magnet and the outer magnet are composed of several tile magnets that are magnetized uniformly along the radial direction. (2) The inner magnet and the outer magnet are in a repulsive configuration. (3) The configuration is unstable in the axial direction and can produce negative stiffness. | (1) Stewart platform can have lower resonance frequencies (2) Compact configuration of the presented negative-stiffness magnetic spring (NSMS). | (1) Complex structure and many components. (2) High cost | Displacement transmissibility Force transmissibility | Compare to the system without negative stiffness magnetic spring, frequency-sweeping results is improved. |
(6-DOF) Pyramidal 3-quasi-zero-stiffness (QZS) strut isolator [61] | | (1) Four pyramidal 3-QZS-strut isolators hold the platform (2) Four pyramidal 3-QZS-struts are identical to each other (3) The vertical inclination angles are the same at the static equilibrium (4) Both the platform and machine are mounted rigidly and located symmetrically. | (1) The proposed isolator has the QZS characteristics in all six DOFs (2) The QZS struts provided good vibration isolation effectiveness (3) Broadened the bandwidth of vibration isolation into lower-frequency (4) jumping phenomenon reduced | (1) Complex structure and many components. (2) High cost | Force transmissibility | Natural frequency Ωx = Ωy = 0.4082 Ωz = 1 |
(3-DOF) Multi-direction quasi-zero-stiffness (MSQZS) vibration isolator [49] | | (1) Four n-layer scissor-like structures assembled symmetrically (2) Linear spring and damper are used in the vertical direction (3) Isolation object connected with four scissor-like structures and linear spring and damper | (1) Excellent vibration isolation in three directions simultaneously (2) Adjustable structural parameters in the QZS system with scissors-like structure (SLS) | (1) Complex structure | Displacement transmissibility | Compare to multi-direction quasi-zero-stiffness displacement transmissibility, reduces from 11.5 to 0.5. |
(3-DOF) High-static–low-dynamic stiffness (HSLDS) struts and spatial pendulum passive isolator [62] | | (1) The isolator composed of two HSLDS struts, preload m, three spatial ball hinges, and two massless rods. (2) Without external excitation, the isolator would stay at a static equilibrium position (3) The length of two massless rods is l. (4) Payload m absolute motion is , and two horizontal directions are . (5) Two HSLDS struts are identical and symmetrically fixed on the ground. (6) HSLDS struts with magnetic negative stiffness spring (MNSS) and spiral flexure spring (SFS) | (1) High-static–low-dynamic stiffness in the vertical direction and quasi-zero stiffness in two horizontal directions (2) Expanded low-frequency isolation bandwidth in each direction (3) No resonance phenomenon occurring in two horizontal directions | (1) Complex structure and many components. (2) High cost (3) Large packaging space. | Displacement transmissibility | Except for the small rise in the range from 5 to 12 Hz, displacement transmissibility in x and y directions are good. |
(3-DOF) High-static–low-dynamic stiffness (HSLDS) magnetic vibration isolator system [63] | | (1) The isolator combines a positive-stiffness spring with a negative-stiffness in parallel. (2) A special device spiral flexure spring (SFS) is applied to provide positive stiffness (3) A magnetic negative-stiffness spring (MNSS) is applied to provide negative magnetic stiffness (MNS) (4) Positive stiffness and negative stiffness cancel each other for reducing the resonance frequency of the isolator. | (1) Good load capacity under a small static deformation (2) Large and flattened magnitude of MNS near the equilibrium position (3) Damping property is improved considerably. | (1) Complex structure and many components. (2) High cost | Vibration transmissibility | Compare to the system without magnetic negative-stiffness spring, the vibration transmissibility has been reduced by 22.25. |
(2-DOF) Torsion QZS vibration isolator [58] | | (1) Shafts connected two ends of the isolator (2) The right (7) and left (6) shaft connector are connected (3) The rubber is a linear vibration isolator (4) Four cylindrical cams (1) contact with four rollers (2) (5) Roller (2) is held by slider (4), and sliders are supported by a spring (3) (6) As for rolling contact, the friction between the cylindrical cam (1) and the roller (2) is neglected | (1) The QZS isolator has a good sensibility to a deviation of output torque. | (1) Limited application range where the designed transmission torque is constant. (2) Complex structure and many components. | Dimensionless torque–torsion Dimensionless stiffness | Compare to linear system torque transmissibility, reduced from 23 to 18 |
(2-DOF) High-static–low-dynamic stiffness (HSLDS) vibration isolator system [64] | | (1) The mass M is connected to the base through two horizontal springs and a connecting bar and a vertical spring (2) Horizontal springs are connected between the base and two rollers, and are able to slide in the horizontal direction freely (3) The connecting bar is linked between the roller and mass at point P. Thus, the mass can move vertically. | (1) Good isolation performance in low-frequency vibration and micro-vibration isolation. (2) By reduction in the stiffness in the static equilibrium position and by an increase in the dimensionless spring deformation range. The vibration isolation region has been increased, and the force transmissibility ratio has been reduced. | (1) Limited installation space (2) Limited maximum vibration displacement responses | Dimensionless-displacement and force transmissibility and dimensionless stiffness | |
(2-DOF) Human body-inspired anti-vibration structure with nonlinear inertia (HBIAV-NI) [65] | | (1) The structure contains an X-shaped supporting structure with a nonlinear rotating inertia passive vibration isolation system. (2) The isolator contains a large X-shaped structure supporting the mass , a rotational unit, and a small embedded X-shaped structure. | (1) Adjustable structural parameters (2) Designable nonlinear properties (3) Nonlinear inertia (4) A small embedded X-shaped structure to mimic muscle functions. | (1) Large packaging space. (2) Complex structure | Displacement transmissibility | Compare to linear system and X-shaped structure system, the displacement transmissibility has a slight reduction. |
(1-DOF) Negative-stiffness magnetic spring (NSMS) vibration isolator system [60] | | (1) The structure contains a mechanical spring in parallel with a negative-stiffness magnetic spring (NSMS). (2) The isolated mass moves only in the vertical direction. (3) The NSMS is composed of two opposite-direction ring permanent magnets (4) The outer magnet is fixed on the base, and the inner magnet is fixed with mass m. The mechanical spring is connected between the inner magnet and base. | (1) The proposed NSMS isolator can effectively reduce the peak transmissibility and resonance frequency | The jump-down frequency would increase under excessive base excitation | Displacement transmissibility | Compare to the system without negative-stiffness magnetic spring, the displacement transmissibility has reduced from 23 to 15. |
Vibration isolator with quasi-zero stiffness [42] | | d1 represents the diameter of the inner wall; d2 the diameter of the outer wall; t the wall thickness; s the height of the outer wall; ϕ the angle of the wall inclination; hs the height of the outer wall; ts the thickness of the outer wall; F the load, and x the compression. | (1) Low cost and high speed of manufacture (2) A low natural frequency, which is excellent for vibration isolators | (1) Low load capacity | Natural frequency | The natural frequency of the vibration isolator with a clamp is less than 0.5. |
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Guo, L.; Wang, X.; Fan, R.-L.; Bi, F. Review on Development of High-Static–Low-Dynamic-Stiffness Seat Cushion Mattress for Vibration Control of Seating Suspension System. Appl. Sci. 2020, 10, 2887. https://doi.org/10.3390/app10082887
Guo L, Wang X, Fan R-L, Bi F. Review on Development of High-Static–Low-Dynamic-Stiffness Seat Cushion Mattress for Vibration Control of Seating Suspension System. Applied Sciences. 2020; 10(8):2887. https://doi.org/10.3390/app10082887
Chicago/Turabian StyleGuo, Linchuan, Xu Wang, Rang-Lin Fan, and Fengrong Bi. 2020. "Review on Development of High-Static–Low-Dynamic-Stiffness Seat Cushion Mattress for Vibration Control of Seating Suspension System" Applied Sciences 10, no. 8: 2887. https://doi.org/10.3390/app10082887
APA StyleGuo, L., Wang, X., Fan, R.-L., & Bi, F. (2020). Review on Development of High-Static–Low-Dynamic-Stiffness Seat Cushion Mattress for Vibration Control of Seating Suspension System. Applied Sciences, 10(8), 2887. https://doi.org/10.3390/app10082887