Research on control of electromechanical servo system based on HGVDBO – LADRC

To synergistically optimize dynamic response, anti-disturbance capability, and parameter robustness in electromechanical servo systems. A composite control strategy is proposed. This strategy adopts an improved Dung Beetle Optimizer (HGVDBO) to automate the parameter tuning of a Linear Active Disturbance Rejection Controller (LADRC). The structure of the LADRC-based electromechanical servo system is designed at first. Then the improved Dung Beetle Optimizer (HGVDBO) is adopted by considering the difficulties of parameter tuning of LADRC and the requirements on accuracy and rapidity of the controller. The proposed HGVDBO – LADRC is compared with conventional incremental PID control through simulations and experiments. The results demonstrate that the proposed strategy achieves a 7.46% reduction in step response adjustment time with nearly eliminated overshoot, and the maximum tracking error is close to zero under a 50 N pulse disturbance. Thus, the HGVDBO – LADRC can obtain a significant reduction in tracking error under various loading conditions, and it can also maintain stable performance during sudden load stiffness mutations. Its superior accuracy and robustness are verified.