大口径拼接光栅闭环控制算法设计  

Design of PID control algorithm on large diameter tiled-grating

作　　者：周忆[1,2] 谭波[2] 廖云飞[2] 刘有海[2] 左东[2] 

机构地区：[1]重庆大学机械传动国家重点实验室,重庆400030 [2]重庆大学机械工程学院,重庆400030

出　　处：《重庆大学学报（自然科学版）》2013年第12期51-56,共6页Journal of Chongqing University

基　　金：高等学校博士学科点专项科研基金(20110191110006);国家高技术发展计划项目(2007AA804217);中央高校基本科研业务费资助项目(CDJXS11111140)

摘　　要：针对拼接光栅系统需要保持长时间动态稳定的特殊控制要求,分析了光栅拼接四维调整误差的数学模型,采用"锁存补偿法"避免饱和遗失与"四点中心差分法"抗干扰对增量式PID算法进行改进,设计了适用于拼接光栅的PID控制算法。拼接光栅自动闭环控制实验的光斑图像表明,改进的PID控制算法能够使拼接光栅在1h内保持动态稳定。To realize the long-time dynamic stability for the tiled-grating control system, a PID algorithm based on the analysis of the four-dimensional degree of freedom mathematical model for the tiled-grating is developed. Two improvements are made in incremental PID algorithm. The latches compensation method is used to avoid saturated loss, and the four-point center difference method is applied to avoid interference. The splicing spot photos of the tile＆grating＇s closed-loop control experiments demonstrate that the tiled- grating which employs the improved PID algorithm can acquire a long-time stability as well as the stability can keep one hour.

关 键 词：光栅 PID控制 锁存补偿法 四点中心差分法 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]