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二维耦合光学摆镜是扫描式星载红外光学系统的关键运动部件,其运动特性对伺服系统提出了高精度位置控制与运动解耦的特殊要求。在建模与仿真分析的基础上,提出了一种新的耦合偏移补偿与分割步进的解耦策略,采用位置环与速度环双闭环的PID控制算法,使用有限转角力矩电机和高精度旋转变压器作为执行与测量元件,以DSP为核心构建了二维耦合光学摆镜伺服控制系统。实验结果表明:该方法设计的控制系统二维运动解耦正确,控制精度高,响应时间短,动态特性好且超调小,可广泛应用于高精度摆动扫描控制系统的研究领域,具有很好的工程应用前景。
Two-dimensional coupled optical pendulum mirror is the key moving part of the scanning satellite-borne infrared optical system. Its motion characteristics put forward the special requirements of the servo system for high-precision position control and motion decoupling. Based on the modeling and simulation analysis, a new decoupling strategy of coupling offset compensation and segmentation step is proposed. PID control algorithm based on position loop and speed loop double closed loop is used. The finite-angle torque motor and high-precision Resolver as the implementation and measurement components, DSP as the core to build a two-dimensional coupling optical swing servo control system. The experimental results show that the two-dimensional motion control system designed by this method has the advantages of correct decoupling, high control precision, short response time, good dynamic characteristics and small overshoot. It can be widely used in the field of high precision swing scanning control system and has good performance The project application prospects.