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Actuators, Volume 11, Issue 6

June 2022 - 32 articles

Cover Story: This paper presents a novel cam-based variable stiffness actuator (VSA). It significantly differs from its counterparts in that the external load is distributed on its two motors with a small difference. It is a feasible method to improve VSA’s output power, especially in compact joints, such as rehabilitation devices. The stiffness adjustment involves a spring-balanced crank-slider mechanism with a variable-length base frame. Its tunable node is the common node for force decomposition, synthesis, stiffness adjustment, and position control by setting it as the common groove of two differential variable-pitch cams. The pitch curve synthesis method is put forward to optimize load distribution. The dual motors can work together closely in the same direction against the output load. View this paper

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Article

4 Citations

2,991 Views

16 Pages

Development of Durability Test Device for Magnetorheological Fluids with Two Types of Rotors and Their Long-Term Torque Characteristics

Takehito Kikuchi,
Isao Abe,
Yuya Ueshima,
Shuichi Akaiwa and
Hitoshi Tsuji

Actuators2022, 11(6), 142;https://doi.org/10.3390/act11060142

25 May 2022

Magnetorheological fluids (MRFs) are composites of micron-sized and/or nano-sized Fe particles and nonmagnetic oils, and their rheological properties change with changes in the magnetic field. To distinguish between material and mechanical deteriorat...

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Article

9 Citations

4,677 Views

25 Pages

Whirl Tower Demonstration of an SMA Blade Twist System

Salvatore Ameduri,
Monica Ciminello,
Antonio Concilio,
Ignazio Dimino,
Bernardino Galasso,
Mariano Guida,
Marco Fabio Miceli,
Johannes Riemenschneider,
Steffen Kalow and
Jannis Luebker
+ 1 author

Actuators2022, 11(6), 141;https://doi.org/10.3390/act11060141

25 May 2022

This paper focuses on the development and demonstration of a novel blade morphing system within a whirl tower facility. The scope is to investigate the behavior of the proposed architecture under representative loads, demonstrating its capability to...

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Actuators - ISSN 2076-0825

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