音圈电机反射镜系统的高精度自适应滑模有限时间控制与实现OA

To enhance the control precision of aerial dynamic optical imaging systems,this study address-es the high-precision control problem of Voice Coil Motor-Driven Mirrors(VCMM)by proposing an inte-grated control strategy based on an adaptive sliding mode finite-time control.This strategy enables precise command tracking under conditions of external disturbances and model uncertainties.First,a generalized form of the system dynamics model was established based on the electromechanical characteristics of the VCMM.Second,a nonlinear proportional-integral-derivative type sliding surface was constructed to im-prove the convergence speed of the control system and suppress steady-state errors.Based on this,follow-ing a hierarchical anti-disturbance framework,feedback control terms related to model parameters and er-rors,sliding mode switching control terms,and adaptive control terms were designed.The finite-time con-vergence characteristics of the closed-loop system were rigorously demonstrated using Lyapunov stability theory.Finally,the effectiveness of the proposed composite control strategy was validated through com-parative experiments.Experimental results showed that under a sinusoidal command with an amplitude of 180 arcseconds and a frequency of 1 Hz,and in the presence of periodic bounded disturbances,the system achieved tracking errors with root mean square and peak-to-peak values of only 0.28 arcseconds and 4.04 arcseconds,respectively,significantly outperforming conventional sliding mode control.The proposed control algorithm not only maintains excellent tracking performance but also demonstrates superior distur-bance suppression capabilities.This study provides an effective solution for addressing disturbance rejec-tion and tracking control in high-precision aerial optoelectronic imaging systems.