Reserch On The Key Technology Of The Precision Regulating System Of Laser Light Path For Compton Light Source

As the aerospace industry in our country has been experiencing the rapid development since the 21st century,different kinds of equipments which serve in this industry are faced with higher requirements.X/?detector,the payload of space detection,plays an important and extensive role in the aerospace industry.Before X/?detector can be assembled on spacecraft as the payload,calibration experiment must be done on the ground.For high precision calibration requirement of the space probe,there is a lack of?source,which is with good monochromaricity and also can be continuously adjusted in KeV^MeV within the scope of energy.The main way to obtain?ray is to produce Compton scattering effect by making the high energy electron beam collide with laser.In order to obtain the?source with better monochrome and continuously adjusted energy,the invisible laser beam with 800nm wavelength and the high-energy electron beam with 20?m beam waist should achieve the collision of high accuracy and variable angle.Through researching on domestic and foreign micro-positioning mechanism as well as the fast laser mirror,this thesis designs a Compton laser optical precision adjustment system.This system is used to adjust the angle of the laser to achieve accurate collision with high energy electron beam in a specified point.Especially,this thesis explores the flexural laser reflection mirror,the piezoelectric actuator and the control algorithm of laser optical precision control system.Flexural laser reflection mirror is the key to Compton laser optical precision adjustment system.In order to accurately control the laser light path,it requires that the positioning accuracy of laser mirror angle should reach 610^-4.Based on the micro positioning system,flexural laser reflective mirror is built with flexural hinges as transmission components to enable the mechanical structure of the laser adjusting system to meet the needs of high precision.And the flexural mechanism is modeled and analyzed by using the method of pseudo rigid body model,producing the stiffness model and displacement model of flexural mechanism.Besides,the design of mechanical structure is proved rational by using the finite element method to analyze and prove the force and displacement of flexural laser reflective mirror in the working condition,and also by analyzing the modal frame of flexural laser emission.In this thesis,the factors affecting the precision of laser light path precision adjustment system are studied.Find the function of all kinds of errors,and find the effective method to compensate the error.The work will provide important guide for improving the positioning accuracy of the system.Finally,a closed loop control system is built with the laser interferometer as the detecting element.And the Matlab/Simulink software is also applied in the study to do the simulation analysis on the control system built by the conventional PID control algorithm,and the fuzzy self-turning PID control system produced by the combination of fuzzy control algorithm and PID control algorithm.Through this analysis,it is found that the stability of fuzzy self-tuning PID control system is better.