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Trunk-like Soft Actuator: Design, Modeling, and Experiments

Published online by Cambridge University Press:  11 July 2019

Guanjun Bao ,
Lingfeng Chen ,
Yaqi Zhang ,
Shibo Cai ,
Fang Xu ,
Qinghua Yang  and
Libin Zhang
Guanjun Bao*
Affiliation:
College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China. E-mails: [email protected], [email protected], [email protected], [email protected], [email protected], [email protected]
Lingfeng Chen
Affiliation:
College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China. E-mails: [email protected], [email protected], [email protected], [email protected], [email protected], [email protected]
Yaqi Zhang
Affiliation:
College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China. E-mails: [email protected], [email protected], [email protected], [email protected], [email protected], [email protected]
Shibo Cai
Affiliation:
College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China. E-mails: [email protected], [email protected], [email protected], [email protected], [email protected], [email protected]
Fang Xu
Affiliation:
College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China. E-mails: [email protected], [email protected], [email protected], [email protected], [email protected], [email protected]
Qinghua Yang
Affiliation:
College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China. E-mails: [email protected], [email protected], [email protected], [email protected], [email protected], [email protected]
Libin Zhang
Affiliation:
College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China. E-mails: [email protected], [email protected], [email protected], [email protected], [email protected], [email protected]
*
*Corresponding author. E-mail: [email protected]
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Summary

In recent years, soft robotics is widely considered as the most promising field for both research and application. First of all, the actuator is fundamental for designing, modeling, and controlling of soft robots. This paper presents a new type of pneumatic trunk-like soft actuator, which contains a chamber for stiffness adjustment in addition to three chambers for driving. Thus, the salient feature of the proposed actuator is the ability of stiffness self-regulation. The structure of the proposed actuator is described in detail. Then the theoretical models for elongation and bending motion of the actuator are established. The elongation as well as single-chamber and multi-chamber driving bending of the actuator were tested to verify the mathematical models. Finally, a dual-segment soft robot based on the proposed trunk-like soft actuator was developed and tested by experiments, which implies its potential application in practice.

Keywords

Pneumatic soft actuatorVariable stiffnessMathematic modeling
Type
Articles
Information
Robotica , Volume 38 , Issue 4 , April 2020 , pp. 732 - 746
Copyright
© Cambridge University Press 2019 

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