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- W4384264282 abstract "In order to solve the external periodic disturbance and unknown dynamics influence in the passive rehabilitation process of a rope-driven lower limb rehabilitation robot, a control method with periodic repeated learning was designed. In this control method, the closed-loop dynamics are divided into a periodic disturbance term, an unknown dynamics term, and a basic term, and the shape function is designed by using the Stone–Weirstrass theorem. In the process of periodic operation, the estimated value of the shape function coefficient is repeatedly learned to obtain the periodic disturbance term approximation and to realize the compensation in advance. Through the design of the impedance learning rate, the unknown dynamic term is periodically learned, and the unknown dynamics approximation is obtained. By combining the two approximations with the basic terms which can be solved directly, the external periodic disturbance is compensated for in advance and the control precision is improved. The control algorithm was verified by simulation, and the error fluctuation of the system gradually decreases and reaches the ideal value within several cycles. The performance of the control system is stable, and the problem of limb impedance caused by different patients is well solved." @default.
- W4384264282 created "2023-07-14" @default.
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- W4384264282 date "2023-07-12" @default.
- W4384264282 modified "2023-09-26" @default.
- W4384264282 title "Periodic Disturbance Compensation Control of a Rope-Driven Lower Limb Rehabilitation Robot" @default.
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- W4384264282 doi "https://doi.org/10.3390/act12070284" @default.
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