The Application Of Fuzzy Adaptive Control In Stabilized Platform System Based On DSP

The inertial navigation system plays an important role in the development of navigation and aviation. The stabilized platform is one of the most important part in the inertial navigation system, which determines the system's precision. The solution of conventional platform stabilization loop is constructed by classical PID law and analogue electronic system, which is not so satisfied in precision, respond speed and disturbance rejection. And the analogue electronic system is big, castly and frequently in failure. So looking for advanced control law and digital control is now the main stream. Under this background, the paper studies the Fuzzy Adaptive PID (FAPID) control method for platform stabilization loops.The platform stabilization loops are theoretically analyzed and compensated. The experimentation result of design and emulation argues that the conventional PID control is feasible. By designing the FAPID controller and doing the emulation, the result indicates that this methed get a big improvement in the precision, respond speed and disturbance rejection.Direct Digital Control of platform stabilization loops based on DSP is investigated. The hardware and software are designed. In hardware design, TMS320F2812 is adopted as the base of controller. The relative circuitry is discussed. And in software design; the main process and subprograme are presented. DSP controller has the advantages in efficiency, speed and precision.TMS320F2812, a product of Texas Instruments Inc., which has 12 PWM output channels, is chosen as the core chip of the digital controller. It makes the motor control more convenient.