Abstract

Pneumatic bending soft actuators have been used in various innovative applications. However, there is a need for efficient design principles and methods that can improve the control accuracy of soft robots. In this paper, we present a mathematical model of soft bending actuators based on optimization and design a cylindrical soft actuator with asymmetric inner cavity that will perform bending motion upon pressurization. We introduce neutral plane as a reference layer with constant length instead of using a strain-limiting layer on the soft actuator. Preliminary experimental results verify the modelling approach and demonstrate the effectiveness of the proposed method.

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