摘要
在基于图像传感器的倾斜镜控制系统中,由于传感器采样频率和系统延时的影响,限制了系统的闭环性能和控制带宽。在有限带宽的条件下,本文提出利用光栅尺测量位置,差分得到速度,实现基于图像传感器系统的速度-位置反馈控制,从而提升倾斜镜控制系统的误差抑制能力。速度反馈环节的引入,使控制系统呈微分特性,当速度反馈闭环完成后,图像位置回路具有积分特性,此时使用PI控制器稳定系统,从而使得系统从零型上升为二型系统,提升系统的误差抑制能力。仿真和实验都证明这种方法可以有效地提高跟踪控制系统的闭环性能。
In the image-based tip-tilt mirror control system,the closed-loop performance and bandwidth of the system and are limited due to the influence of sensor sampling frequency and system delay.Under the condition of limited bandwidth,this paper proposes to use linear encoder to measure the position,and get the rate signal by difference.The position-rate feedback control based on the image sensor system is realized to improve the error suppression ability of the tip-tilt mirror control system.Because of the addition of rate feedback,the control system has differential characteristics.When the rate feedback closed-loop is completed,the image position loop has integral characteristic.At this time,a PI controller is used to stabilize the system,which makes the system rise from zero type to two type system,and improves the error suppression ability of the system.Simulation and experiment show that this method can effectively improve the closed-loop performance of the tracking control system in low frequency domain.
作者
阮勇
徐田荣
杨涛
唐涛
Ruan Yong;Xu Tianrong;Yang Tao;Tang Tao(Institute of Optics and Electronics,Chinese Academy of Sciences,Chengdu,Sichuan 610209,China;Key Laboratory of Beam Control,Chinese Academy of Sciences,Chengdu,Sichuan 610209,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《光电工程》
CAS
CSCD
北大核心
2020年第12期47-53,共7页
Opto-Electronic Engineering
基金
中国科学院青年创新促进会资助项目。
关键词
倾斜镜
光栅尺
图像传感器
时延
速度-位置控制
误差抑制
tip-tilt mirror
linear encoder
image sensor
time delay
position-rate control
error attenuation
