基于重复控制的遥感器两轴随动同步控制系统  

Two-axis Servo Synchronous Control System for Optical Remote Sensor Based on Repetitive Control

作　　者：郝中洋[1,2] 何海燕 于飞[1] 李超[1] 李婧[1] HAO Zhongyang1,2 HE Haiyan1 YU Fei1 LI Chao1 LI Jing1(1 Beijing Institute of Space Mechanics ＆ Electricity, Beijing 100094, China ） （2 Beijing Key Laboratory of Advanced Optical Remote Sensing Technology, Beijing 100094, China)

机构地区：[1]北京空间机电研究所,北京100094 [2]先进光学遥感技术北京市重点实验室,北京100094

出　　处：《航天返回与遥感》2018年第1期69-77,共9页Spacecraft Recovery & Remote Sensing

基　　金：国家重大科技专项工程

摘　　要：扫描系统可以使光学遥感器获得更大的成像幅宽。为实现大角度扫描,光学系统采取扫描主镜和半角随动镜的两轴形式。文章对光学遥感器扫描系统两轴随动的同步控制问题进行了研究,针对两轴随动装置周期性较强的特点,提出在主从同步系统的常规PID控制系统基础上增加重复控制环节,重新设计了一个改进的同步控制器。利用重复控制对周期性外激励信号的跟踪、抑制性好的特点,增强系统对同步误差的抑制作用。仿真结果表明,利用重复控制理论设计的同步控制器在保证原有系统跟踪精度和动态性能的前提下,有效的减小了扫描成像时间段内的同步角度误差。扫描成像阶段内同步误差减小了78%。Scanning system can make the optical remote sensor have a larger imaging width. In order to scan in a wide-angle range, the two-axis scanning pattern, including a master scanning mirror and a slave half-angle follower, is often selected in the optical design. In this paper, two-axis servo synchronous control was studied for optical remote sensor scanning system. Taking advantage of the strong periodicity characteristic in two-axis servo device, the conventional PID control scheme was updated by adding a repetitive control link in the master-slave synchronization system, and at the same time an improved synchronous controller was also redesigned. As the repetitive control has better track/suppress characteristic to periodic external pumping signal, the system synchronous error was greatly inhibited. From the simulation results, one can find that the design of the synchronous controller based on control theory, is effective to decrease the synchronous angular error during the scan imaging phase, in addition to maintaining the required tracking accuracy and dynamic performance. The synchronization error was reduced by 78% during the scan imaging phase.

关 键 词：同步控制 重复控制 两轴随动 光学遥感器 

分 类 号：TP293[自动化与计算机技术—检测技术与自动化装置]