Damping Compensation for Active Vibration Isolation System With Active Disturbance Rejection Control

In active vibration isolation systems (AVIS) with electromagnetic actuators, a fundamental trade‐off exists between high‐precision suspension control and effective vibration isolation. Although the classic active disturbance rejection control (ADRC) framework can estimate and compensate for disturbances, its conventional design tends to prioritise gap stabilisation without fully leveraging vibration feedback from the isolated object. This paper proposes a damping compensation‐based ADRC (DC‐ADRC) framework that integrates real‐time vibration information from the isolated object to overcome this limitation. The extended state observer (ESO) is utilised to estimate disturbances in the relative position loop to ensure suspension stability, whereas a newly designed damping compensator actively incorporates absolute acceleration feedback to improve isolation performance. This new control strategy enhances both disturbance rejection and vibration isolation performance. Simulations and experimental results indicate that the controller provides outstanding vibration isolation performance, improving active isolation capabilities and effectively preventing mechanical collisions.