Design and dynamic modeling of a continuum and compliant manipulator with large workspace

被引:0
|
作者
Sofla, Mohammad Sheikh [1 ]
Sadigh, Mohammad Jafar [1 ]
Zareinejad, Mohammad [2 ]
机构
[1] Univ Tehran, Coll Engn, Sch Mech Engn, Tehran, Iran
[2] Amirkabir Univ Technol, New Technol Res Canter, Tehran, Iran
关键词
Continuum robot; Compliance; Pneumatic muscle actuator; Hysteresis; Bouc-Wen model; ARTIFICIAL MUSCLE; ROBOTS; ARM;
D O I
10.1016/j.mechmachtheory.2021.104413
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
This paper focuses on the design and dynamic modeling of a novel multi-section continuum and compliant robotic manipulator with large workspace. In large scales, many of the design techniques and actuator types which have proved advantageous in creating continuum robots at smaller scales are not applicable. Fluidic muscles, a class of pneumatic muscle actuators (PMAs) with large scale movements, high actuation forces and compliant nature, are utilized in the design of the continuum manipulator. However, these actuators are capable of applying axial contracting forces and cannot produce bending movements. Moreover, their asymmetric hysteresis nonlinearity causes difficulties in the accurate control procedure. These drawbacks are addressed in the design and presented model of the manipulator. The presented model is based on constant curvature method and concentrated masses. The Bouc-Wen hysteretic function is modified to describe the asymmetric force/length hysteresis of the utilized PMAs in this model. Experimental results show that the proposed model has a proper performance to characterize the asymmetric hysteresis loop of the actuators. Finally, the design and dynamic model of the robot are validated experimentally on the implemented manipulator. (c) 2021 Elsevier Ltd. All rights reserved.
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页数:17
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