Abstract
To address the high-precision trajectory tracking task of uncertain robotic manipulators, a continuous sliding mode control (CSMC) scheme based on time-varying disturbance estimation and compensation is developed. The proposed control approach can not only avoid the chattering of the traditional sliding mode control (SMC) scheme and solve the problems existing in the application of the CSMC method but also make the robot obtain stronger disturbance rejection performance. Meanwhile, the stability of the closed-loop system under the recommended control approach is guaranteed by a defined Lyapunov function. Finally, the trajectory tracking and disturbance rejection performance of the 2-DOF robot under the action of the PID control, traditional SMC, CSMC, and present control methods are carried out, respectively. The results show the effectiveness and superiority of the proposed control method.
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