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Updated: Jul 9, 2025

Fabrication of Soft Pneumatic Network Actuators with Oblique Chambers
Published on: August 17, 2018
Dynamic modelling and inverse compensation for coupled hysteresis in pneumatic artificial muscle-actuated soft
Ying Zhang1, Qiang Cheng1, Wenlin Chen2
1School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, China.
Abstract:
The soft manipulator actuated parallel with contractile and extensor pneumatic artificial muscles (PAMs) can perform continuous operations and vary stiffness. Due to the hysteresis nonlinearity of PAMs and parallel driving, the manipulator shows coupled hysteresis with stiffness-dependent and rate-dependent characteristics, causing inaccurate positioning performance. This paper firstly proposes a comprehensive dynamic model consisting of two parts in series to predict the manipulator dynamical behaviors with coupled hysteresis. Furthermore, a decoupled inverse compensation and decoupling control on the basis of the proposed model is conducted on the soft manipulator. Experimental results and comparisons illustrate the high precision and strong generalization ability of the proposed model and the validity of the compensator in mitigating the coupled dynamic hysteresis of the system.
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