A Study On Control Algorithm Of Stabilized Platform System And Implementation Of DSP

In recent years, Airborne optoelectronic pod is improved rapidly and extensivelyused in military and civil field. Stabilized platform system, which is used for isolatingairborne and external disturbance, eliminating image jitter, ensuring image legible andstable，is a significant component of optoelectronic pod. The paper make study oncontrol algorithm of stabilized platform system and design of DSP controller based onairborne optoelectronic pod.The study of the paper primarily contains four aspects:Firstly, the paper has studied on system composition, essential principle, keymodel, disturbance and coupling problem of stabilized platform system. Motor driverschematic diagram and PCB diagram are also accomplished. Finally, the stabilizedplatform is founded with closed loop.Secondly, directing toward main disturbance, coupling problem and referenceframe of stabilized platform, with or neither with geometric restricted coupling,multiple space models are proposed in the paper.Thirdly, the paper has intensively studied on essential theory and mathematicalformula of fuzzy system, which could express human experience and knowledge well.Nonuniform member function and three dimensional fuzzy rule base are also presentedin the paper. Fuzzy PID controller is designed with parallel structure and nonlinearfactor.In the last part, DSP F2812software system is designed to realize Fuzzy PIDalgorithm. Peripheral equipments of DSP system are also used to realize serialcommunication with sensor and PWM control signals output。Fuzzy PID controller,which have parallel structure and nonlinear factor, canintegrate advantages of Fuzzy controller and PID controller and result in good robustand control accuracy. Fuzzy system have nonuniform member function and threedimensional fuzzy rule base, which can sufficiently used the engineer’s knowledge andexperience. Experimental results indicate that Fuzzy PID controller, in which steadyprecision is0.1mrad, could isolate airborne and external disturbance well andanticipatory goal is realized. In the end of the paper, a conclusion has been drawn and we look forward to the study in the future.