Research On Methods Of Improving The Performance Of Radar Angle Measurement

With the development of modern spacecraft，such as statellite and aerospace, themore excellent performance is demand on dynamic performance, high tracking accuracyof tracking radar. In aerospace tracking、measuring and control area, precision trackingradar is playing the vital role, therefore its performance must meet higher standards.Theservo subsystem is one of the main parts of radar angle measuring system, and itsperfect working state is the first condition of completing tracking and measuringspaceship task. High-performance radar servo systemusually consists of current loop,velocity loop and position loop. The radar servo subsystem must meet Thecharacteristics of the fast response, high precision and wide speed range, etc.In this paper, The our project has improved measure angle capability for precisionmeasurement and control equipments used for many years as background, has servosubsyetem subsystem of signal pulse radar、unified S-band measurement and controlsystems as object to study,has Matlab simulation、fuzzy-control and elevation gravityunbalanced elimination of gear gap as technical measures. Firstly, the paper analyzes thetricyclic structure of servo system, use the Matlab simulation on the current loop,velocity loop and position loop, and verify the correctness of the model. Secondly, thispaper designs a fuzzy-PID controller by combining the fuzzy control principle and PIDcontroller. Thirdly, this paper analyzes backlash principle of radar servo systems,proposes the pitching mismatch backlash gravity methods anddouble-electromechanical backlash parameter setting method to improve the backlashperformance of the servo systems.To validate the above methods, the paper first tests servo system’s main componentsusing the tricyclic structure simulation method. Second, we apply the Fuzzy-PIDcontroller to actual equipments to test the improvemtns of speed loop controlcharacteristics. Then, we apply the pitch mismatch backlash gravity method to controlradars to test the improvements of tracking accuracy. Finally, we apply the doubleelectromechanical backlash adjustment method to the S-band control system to testbacklash performance improvements.