[Objective] For a dual-motor servo system with external disturbance torques

a terminal sliding mode control (TSMC) strategy based on a finite-time disturbance observer is proposed. The aim is to enhance the dynamic response quality

robustness

and cooperative motion accuracy between the dual motors under complex working conditions. [Methods] Firstly

a finite-time disturbance observer was designed to quickly and accurately estimate external disturbances

ensuring that the observation error converged in finite time. Second

a nonsingular terminal sliding mode surface was constructed to avoid singularity issues and enhance the system’s anti-interference capability. Then

synchronous feedback and an optimized reaching law were introduced to suppress chattering and ensure high-precision synchronization of the dual motors. Finally

based on the Matlab/Simulink simulations platfrom

the performance of the proposed TSMC strategy was compared and analyzed with that of the integral sliding mode control strategy. [Results] The results demonstrated that the proposed TSMC strategy exhibited significant advantages in system load tracking performance

trajectory tracking error

and dual-motor synchronization error. [Conclusion] The proposed TSMC strategy theoretically guarantees finite-time stability of the system and demonstrates significant practical advantages

including strong anti-interference capability

fast dynamic response

and high-precision synchronization. This achievement provides an effective solution for controlling high-performance dual-motor servo systems in scenarios with complex disturbances and stringent accuracy requirements.