The Design And Research On Stabilized System Of Vehicle Optical-Electronic Platform

With the wide application of electro-optic reconnaissance, surveillance and tracking to military, the opto-electric instrument is mounted on the stabilized platform. The swinging from the carrier is isolated by the gyro stabilized platform, and it will get a environment which is stabilized relative to the inertial space. And it will realize searching, capture, tracking and orientating function to the object under the control command. So the airborne opto-electric stabilized platform has two functions: to realize the space stabilization, and to track the object.At first, a brief introduction of structure and method of stabilization and the survey of development of Airborne Opto-Electronic Platform in the world are summarized in this paper. Common controlling methods of stabilization and tracking are put forward. And then, the principal of how movement of airplane can be isolated by a two-axis-platform is analyzed theoretically. To the stable platform control system key link moment of force electrical machinery and the platform load, the gyroscope, the PWM signal produced with the power amplification electric circuit, the low pass filter have carried on the modelling, and After this the arithmetic model is built and the simulation of control system is done by using MATLAB. It provides the basis of theory for designing servo system. Then has carried on the project design to the steady platform, including the steady platform structural design, and reduces the wind resistance for the anti-hurricane, designs the sphere servo turnplate's track, the fixed base for the guarantee stable, the firm reality, the wind resistance is small, plans to use many column support's structure, the sensor wants to appear externally under the environment to work for a long time. Steady platform's track and the pitching shafting and the position shafting need the strict seal, and the surface spreads the antirust paint. The steady platform server design first (range coverage) proves based on system's might, then through to the power harmony top, the optical fiber top, the fluid floats top's performance index comparison, Chooses the optical fiber top to take the speed closed loop feedback sensor finally. Obtains the rotor inertia through the CAD simulation, the maximum speed which, the accelerometer in the use system performance target requests figures out the torque to choose the electrical machinery. Aiming at the difficulty that there are pure long time delays of tracking error of TV tracker and Infrared tracker, we can get the result that the lower the cutoff frequency of open loop and the tracking precision are reduced. To overcome the bad effect of long delays, a prediction and compensation method based on Kalman filter is given. In addition, the high accuracy data which obtains using the predictive filtering, when carries on the track way cut, only cuts the data pool, will not cause server's vibration, the improvement many kinds of track method cut. In addition, the high accuracy data which obtains using the predictive filtering, when carries on the track way cut, only cuts the data pool, will not cause server's vibration, the improvement many kinds of track method cut.