Modeling And Study On Stability Of Ship-borne Optoelectronic Tracking Servo-system

Along with the progress of the national defense science and technology development, the ship-borne photoelectric tracking equipment has become an important auxiliary facility of naval air defense weapons. As the tracking target such as the modern weapons and aircraft has faster speed, stronger mobility, higher requirements, it stands to reason to require more demanding that rapid reaction, motor ability of equipment and motor between sight-stabilizing, tracking, and fighting ability, especially for the precision and response rapidity requirements of electro-optical tracking equipment. As the control system of the brain, a compatible controlling method for environment determines whether the system can achieve the parameters of the above points. Ship-borne photoelectric devices are used in the ship shaking, bad weather and high anti-interference, etc.All kinds of complicated environments will challenge ship-borne photoelectric equipment hardware and software design.Under the influence of ship rocking, in bad weather conditions particularly, all kinds of factors such as the swing of ship-borne photoelectric tracking equipment and the wind torque will make optical axis deviation from target tracking platform. The vector in the direction of azimuth and pitching angular motion or vibration through the bearing friction coupling on the photoelectric tracking platform jitter, which cause the jitter of photoelectric imaging sensor line-of-sight visual axis. The image blurring caused by wobble, affects not only the image quality, but also the precision of the tracker to extract target miss distance. As a result, the visual axis stable technology must be adapted for a decline in tracking performance in order to provide the measuring equipment with a work platform which has stable space.To solve these problems, the new type of micro-processor DSP and optical axis gyro inertial stable method and a new control strategy is used with the demand of a photoelectric tracking system on the basis of the existing professional technology. The digital servo system has good dynamic performance and anti-interference ability. Neural networks PID controller and sliding mode PID controller are respectively used for analysing the ship-borne photoelectric tracking servo system stability in the simulation of the tracked target in real acceleration and varying accelerated motion state. The simulation experiment result shows that the movement of tracked target status to uniform state, sliding mode PID controller can meet the requirements of the system tracking, while being tracked target motion state of accelerated motion, PID control performance and stability of the sliding mode controller is significantly worse than the neural network PID controller.In this paper, the research provides a concrete model optoelectronic tracking servo system, control algorithm and the performance estimation of reference and plays a very important role in engineering application.