Rehabilitation robots can reproduce the rehabilitation movements of therapists by designed rehabilitation robot control methods to achieve the goal of training the patients’motion abilities.This paper proposes an imp...Rehabilitation robots can reproduce the rehabilitation movements of therapists by designed rehabilitation robot control methods to achieve the goal of training the patients’motion abilities.This paper proposes an impedance sliding-mode control method based on stiffness-scheduled law for the rehabilitation robot,which can be applied to rehabilitation training with both active and passive modes.A free-model-based sliding-mode control strategy is developed to avoid model dependence and reduce the system uncertainty caused by limb shaking.Additionally,the stiffness scheduling rule automatically regulates the impedance parameter of the rehabilitation robot based on the force exerted by the patient on the robot such that the rehabilitation training caters to the patient’s health condition.The proposed method is compared with the fixed stiffness and variable stiffness impedance methods,and the superiority of the proposed method is proved.Rehabilitation training experiments on an actual rehabilitation robot are provided to demonstrate the feasibility and stability of the proposed method.展开更多
基金supported by the National Natural Science Foundation of China under grants 62373051 and U22A2048.
文摘Rehabilitation robots can reproduce the rehabilitation movements of therapists by designed rehabilitation robot control methods to achieve the goal of training the patients’motion abilities.This paper proposes an impedance sliding-mode control method based on stiffness-scheduled law for the rehabilitation robot,which can be applied to rehabilitation training with both active and passive modes.A free-model-based sliding-mode control strategy is developed to avoid model dependence and reduce the system uncertainty caused by limb shaking.Additionally,the stiffness scheduling rule automatically regulates the impedance parameter of the rehabilitation robot based on the force exerted by the patient on the robot such that the rehabilitation training caters to the patient’s health condition.The proposed method is compared with the fixed stiffness and variable stiffness impedance methods,and the superiority of the proposed method is proved.Rehabilitation training experiments on an actual rehabilitation robot are provided to demonstrate the feasibility and stability of the proposed method.
