Design of a two axes stabilization platform for vehicle-borne opto-electronic imaging system

摘要

MEMS(micro-electro-mechanical system) combining the micro-mechanical and the micro-electro technology gets a prominent development at the present time. Compared with the traditional mechanical, laser and fiber-optic gyro, MEMS gyro has some outstanding advantages including cheap, small volume, light, less power dissipation, quick start-up and shock resistance, so it's suitable for stabilization platform. A lightweight and inexpensive two axes stabilization platform is designed with MEMS IMU for the vehicle-borne opto-electronic imaging system. First, the main error of the MEMS IMU is analyzed and Kalman filter is used to eliminate the random drift of the MEMS gyro. Then, the transfer function of torque disturbance and unexpected angular motion is derived and closed loop controller is designed by lead and lag compensator network. Finally, the stabilization platform is proven effective for the vehicle-borne opto-electronic imaging system from torque rigidity and isolation ratio aspects by simulation.