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Erschienen in:
2017 | OriginalPaper | Buchkapitel
Impedance Control of a Pneumatic Muscles-Driven Ankle Rehabilitation Robot
verfasst von : Chi Zhang, Jiwei Hu, Qingsong Ai, Wei Meng, Quan Liu
Erschienen in: Intelligent Robotics and Applications
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Abstract
Pneumatic muscle is a new type of flexible actuator with advantages in terms of light weight, large output power/weight ratio, good security, low price and clean. In this paper, an ankle rehabilitation robot with two degrees of freedom driven by pneumatic muscle is studied. The force control method with an impedance controller in outer loop and a position inner loop is proposed. The demand of rehabilitation torque is ensured through tracking forces of three pneumatic muscle actuators. In the simulation, the constant force and variable force are tracked with error less than 10 N. In the experiment, the force control method also achieved satisfactory results, which provides a good support for the application of the robot in the ankle rehabilitation.