Disturbance and Vibration Suppression of A Dual-Inertia Servo System with Fractional-Order Model

To enhance the control accuracy of servo systems, this paper proposes a novel control strategy based on a dual-inertia servo model, incorporating a fractional-order approach to improve modeling precision and system performance. First, a sliding mode observer (SMO) is constructed to estimate the system’s state variables. Then, a compensation method is designed to transform the system into a triple-integrator form. Finally, a cascade controller is developed to suppress disturbances and mitigate vibrations. The effectiveness of the proposed strategy is validated through simulation results, which illustrate its superior ability to reduce system disturbances and vibrations.