Design and Control of a Nonlinear Series Elastic Cable Actuator Based on the Hill Muscle Model

Author:

Su Yingbing,Zou Huaiwu,Lu HongrunORCID,Hu BingshanORCID,Yu Hongliu

Abstract

The bionic design of muscles is a research hotspot at present. Many researchers have designed bionic elastic actuators based on the Hill muscle model, and most of them include an active contraction element, passive contraction element and series elastic element, but they need more parametric design of mechanical structure and control under the guidance of Hill muscle model. In this research, a nonlinear series elastic cable actuating mechanism is designed in which the parameters of the elastic mechanism are optimized based on the Hill muscle model to fit the nonlinear passive elasticity of a muscle. Through the force–position relationship determined by the Hill muscle model, the output force and position of a nonlinear series elastic cable actuator are controlled to simulate the active contraction performance of a muscle. The experiments show that the proposed design and control method can make the nonlinear cable actuator have good muscle-like output force–displacement characteristics.

Publisher

MDPI AG

Subject

Control and Optimization,Control and Systems Engineering

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