High-precision dynamic torque control of high stiffness actuator for humanoids
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Updated: Jul 22, 2025

Method to Measure Tone of Axial and Proximal Muscle
Published on: December 14, 2011
Yaliang Liu1, Xuechao Chen1, Zhangguo Yu2
1School of Mechatronical Engineering, Beijing Institute of Technology (BIT), Beijing 100081, China; The Key Laboratory of Biomimetic Robots and Systems, Ministry of Education, Beijing 100081, China.
Abstract:
The high stiffness actuator (HSA), applied to each joint of an electrical driven humanoid robot, can directly affect the motion performance of the torque-controlled humanoid robots. For high control performance of HSA, a high-precision dynamic torque control (HDTC) is proposed. The HDTC consists of two phases: (1) A novel dynamic current control is used to linearize high stiffness actuator torque control system, which can estimate and compensate the nonlinear coupling parts; (2) An enhanced internal model control is designed to ensure high tracking accuracy in the system containing noisy torque signal and even numerical differentiation signals. Benefitting from dynamic current control and the enhanced internal model control, the proposed HDTC is accurate and adaptable. Finally, the superiority of the HDTC is verified with comparative experiments.
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