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Actuators, Volume 8, Issue 4

2019 December - 12 articles

Cover Story: Next-generation robotics such as collaborative robots, exoskeletons, and legged robots all require a level of compliance. Active impedance control offers variable parameters compared to passive elements like springs and dampers with constant parameters. Implementing this requires high-bandwidth robust torque control, which induces noise issues even if high-end sensors are used. To address this, a complete controller design scheme of a BLDC motor, including field-oriented control (FOC), is proposed. A novel speed and angle observer reducing noise from the angle sensor and a Kalman-based torque observer reducing noise from the phase current sensors are demonstrated. The paper demonstrates and benchmarks the method in practice, and all details and materials are disclosed, offering a ready-to-use approach to compliant robots. View this paper
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Articles (12)

  • Article
  • Open Access
33 Citations
9,463 Views
16 Pages

5 December 2019

This research paper presents the second part of a comparative analysis of a novel self-contained electro-hydraulic cylinder with passive load-holding capability against a state of the art, valve-controlled hydraulic system that is typically used in l...

(This article belongs to the Special Issue Electro-Hydraulic Actuators)
  • Article
  • Open Access
44 Citations
10,372 Views
19 Pages

5 December 2019

This research paper presents the first part of a comparative analysis of a novel self-contained electro-hydraulic cylinder with passive load-holding capability against a state of the art, valve-controlled actuation system that is typically used in lo...

(This article belongs to the Special Issue Electro-Hydraulic Actuators)
  • Article
  • Open Access
14 Citations
7,970 Views
9 Pages

Characteristics and Analysis of an Eddy Current Shock Absorber Damper Using Finite Element Analysis

  • Tamer M. Abdo,
  • Ahmed A. Huzayyin,
  • Ahmed A. Abdallah and
  • Amr A. Adly

19 November 2019

In the paper a model is developed for a proposed eddy current damper using finite element analysis. Several damper configurations are studied and its characteristics are analyzed. The steady state performance for the configurations is compared to rea...

  • Article
  • Open Access
31 Citations
9,221 Views
15 Pages

Pneumatic Hyperelastic Actuators for Grasping Curved Organic Objects

  • Alexandre Galley,
  • George K. Knopf and
  • Mohamed Kashkoush

5 November 2019

Soft robotic grippers often incorporate pneumatically-driven actuators that can elastically deform to grasp delicate, curved organic objects with minimal surface damage. The complexity of the actuator geometry and the nonlinear stress–strain be...

  • Article
  • Open Access
11 Citations
7,756 Views
12 Pages

1 November 2019

Piezoelectric unimorph deformable mirrors offer a cheap solution to adaptive optics, with mass production capability. However, standard solutions have significant drawbacks: (i) the static shape is sensitive to the temperature, and (ii) the low struc...

  • Article
  • Open Access
5,405 Views
9 Pages

23 October 2019

A combustion-based mesoscale thermal actuator is proposed and its performance is studied in both open and closed cycle operations using a physics-based lumped-parameter model. The actuator design is unique as it implements a free-piston complaint arc...

  • Editorial
  • Open Access
18 Citations
10,767 Views
13 Pages

23 October 2019

The present editorial paper analyzes the hundred recent research works on soft actuation to understand the current main research focus in the light of the grand challenges in the field. Two characteristic paper types were obtained: one focuses on sof...

(This article belongs to the Special Issue New Materials and Designs for Soft Actuators)
  • Article
  • Open Access
21 Citations
16,095 Views
33 Pages

17 October 2019

Dynamic compliant robotics is a fast growing field because of its ability to widen the scope of robotics. The reason for this is that compliant mechanisms may ensure safe/compliant interactions between a robot and an external element—for instan...

  • Article
  • Open Access
9 Citations
15,187 Views
12 Pages

17 October 2019

Although 3D printing has been extensively used to create passive machines and mechanisms, 3D printing of actuators is a relatively new concept. 3D printing of actuators allows greater customization, accelerates the design and development, and consequ...

(This article belongs to the Special Issue Pneumatic Actuators for Robotics and Automation)
  • Article
  • Open Access
12 Citations
8,032 Views
22 Pages

29 September 2019

A major inhibition to the widespread use of laminate structures is the inability of nondestructive testing techniques to effectively evaluate the bondline integrity. This work proposes and analyzes a bondline-integrity health monitoring approach util...

  • Feature Paper
  • Review
  • Open Access
142 Citations
37,494 Views
28 Pages

Review of Electrothermal Actuators and Applications

  • Alissa Potekhina and
  • Changhai Wang

21 September 2019

This paper presents a review of electrothermal micro-actuators and applications. Electrothermal micro-actuators have been a significant research interest over the last two decades, and many different designs and applications have been investigated. T...

  • Article
  • Open Access
9 Citations
8,086 Views
13 Pages

Statistical Modeling of Photo-Bending Actuation of Hybrid Silicones Mixed with Azobenzene Powder

  • Takuya Taniguchi,
  • Loïc Blanc,
  • Toru Asahi,
  • Hideko Koshima and
  • Pierre Lambert

20 September 2019

Mechanically responsive materials are promising as next-generation actuators for soft robotics, but have scarce reports on the statistical modeling of the actuation behavior. This research reports on the development and modeling of the photomechanica...

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Actuators - ISSN 2076-0825