Novel Hybrid SM Strategy Based on Speed Control and Disturbances Rejection for High Performance DSIM Drives

In control theory and applications, disturbance cancellation is a critical challenge in the control of nonlinear drive systems, particularly in applications involving Dual Star Induction Motors (DSIM). This paper proposes a new adaptive hybrid sliding mode (SM) strategy that integrates a Repetitive Control (RC) scheme into an improved Second-Order Sliding Mode (SOSM) structure. The goal is to enhance tracking accuracy and periodic harmonic disturbance rejection in DSIM drive systems. The strategy also incorporates a load torque disturbance estimator that efficiently identifies and cancels disturbances, further improving system performance. System stability is guaranteed using Lyapunov theory, ensuring that the virtual control vectors for speed and current loops maintain stability throughout the operation. Simulation results using MATLAB confirm the effectiveness of the proposed control strategy, demonstrating improved tracking performance, harmonic disturbance rejection, and robust operation of the DSIM under varying conditions.