On Stabilization Platform Servo System Based On TMS320F28335

With the development of the aerospace and aviation industry, navigation systemdevelops rapidly. Stabilization platform is important component affected the functionrealization of navigation system and navigation accuracy, which plays an important role tothe development of modern navigation system. The control method of the traditionalstabilization platform gives priority to analog circuit, exists defects including large volume,high cost, frequent malfunction, leads that it can’t meet the requirements including systemminiaturization, system stability and the control ability of system complexity. The rapiddevelopment of high performance digital controller makes a mainstream，and the digitalcontrol systems replaced the analog circuit control system. Most of the domesticservo-system’s control chips are fixed-point chip at present, and its operation ability offloating point is finite, however, using floating point DSP can improve the calculationprecision of algorithm and be more beneficial to improve the stable precision of system.According to the system precision requirements, a project of optical-electro stabilizedplatform system was presented in this paper based on the missile control system. The maincontents included optical-electro stabilized platform system mechanical structure design,optical-electro stabilized platform control system design and analyzed inertia, mechanicalresonant for the influence of the system, completed system of key component selection. Thenthe optical-electro stabilized platform system mathematical model was built, and theoptical-electro stabilized platform system’s digital PID controller was designed. Thesimulation result proved the effectiveness of the digital PID controller. We analyzed theoptical-electro stabilized platform system performance, and verified the optical-electrostabilized platform system had searching, tracking and airspace stabilizing function.For friction on low speed influenced on the performance of the optical-electro stabilizedplatform system, we analyzed the friction and set up the model. Then we analyzed theinhibition of friction methods, design approach based on multi-loop compensation andFeed-forward compensation programs. The simulation results showed that the proposedscheme can restrain effectively overcome the influence of friction torque.Hardware of the optical-electro stabilized platform system was designed based on DSP,and software of the optical-electro stabilized platform system was fulfilled. Finally, weproduced a control Circuit board of the optical-electro stabilized platform and did test. Theresults showed that the optical-electro stabilized platform system had a high response speed, high accuracy and stability of strong anti-disturbance ability of the load. The system met thedesign requirements.