Research And Design Of Galvo Control System Based On Sliding Mode Active Disturbance Rejection Control

As one of the important means to obtain image information in the field of high-speed vision,the galvanometer control system has been widely used in biological,military and sports scenes.In addition,as a high-precision and high-sensitivity control system,the galvo control system is becoming more and more sophisticated.Among them,in the process of realizing the precise capture of small and high-speed moving objects,considering the complex structure of the galvo control system itself,the external changeable environment and human operation errors and other factors,the accuracy and sensitivity of the galvo control system are seriously affected.And the traditional control strategy is difficult to achieve the high-performance control standard of the system.Therefore,in order to meet the high-precision tracking of small high-speed moving objects by the galvo control system,this paper studies these problems.This paper mainly takes the control performance of the galvo control system as the main research object,and expects to achieve the effect of tracking small and high-speed moving objects stably and accurately.In order to improve the tracking accuracy,response speed and anti-interference ability of the galvo control system,a galvo control system based on sliding mode active disturbance rejection control is researched and designed.The concrete work is as follows:(1)In order to meet the performance requirements of the galvo control system,the structure and composition of the system are understood,the operating principle of the system is analyzed,the working scheme of the system is designed and the mathematical model of the system is established.At the same time,considering the influence of the image distortion existing in the two-dimensional galvo system,the method of real-time error compensation is used to correct it.(2)In order to improve the working performance of the galvo control system,a sliding mode active disturbance rejection control strategy is designed.Firstly,the galvo control system based on active disturbance rejection control and the galvo control system based on sliding mode control are analyzed theoretically.Then,aiming at the problems of slow response speed,complex parameter setting,and chattering effect and anti-interference ability of sliding mode control,and combining the advantages of the two control strategies,a sliding mode automatic control is designed.A composite control strategy for disturbance rejection control.This strategy not only retains the anti-interference performance of ADRC,but also improves the tracking accuracy and response speed.(3)In order to verify the feasibility of the sliding mode active disturbance rejection control strategy,simulation verification and experimental verification are carried out respectively.The simulation is to build a simulation model of the galvo control based on the sliding mode active disturbance rejection control through the Simulink simulation software for simulation verification.The experiment is to built an experimental platform based on simulated ballistic tracking,using a high-speed camera to capture the simulated bullet trajectory through a two-dimensional galvo system,and the deflection of the galvo lens is realized through the galvo control system.Finally,the simulation and experimental verification shown that the galvo control system based on sliding mode active disturbance rejection controller designed in this paper has good operating performance.Moreover,the system can still operate stably even in the face of external disturbances in a complex environment.This is of great significance to the research of galvo control system.