Design And Research On Control System Of Photoelectric Search Tracking Turntable

With the continuous improvement of national infrastructure transportation facilities,the aircraft travel has become a universal choice for the public.The threat of drones,flying birds and other flying objects makes the security situation at the airport even more severe.The photoelectric search and tracking turntable control system can monitor the flying objects in the target airspace in real time.In this paper,the main factors affecting the performance of the turntable are studied based on the two axis tracking turntable.In order to improve the system accuracy,a feasible solution has been put forward,and the software and hardware design of the system is completed.Finally the turntable control system has been experimentally verified.Firstly,the whole structure of the photoelectric search and tracking system and the functions of each module are introduced.The technical indicators of the system design have been proposed to complete the selection of the main device of the servo control system.Then,the mathematical model of the turntable control system is established.According to the system,the dual-loop controller which switches control methods according to the magnitude of system deviation is designed.A crude control circuit is used when the deviation is large,and a precision control circuit is used when the deviation is small.The performance of the controller is verified by experiments.Secondly,analyzed the delay of miss distance in the photoelectric tracking system,and then established the Kalman filter which is according to the thirdorder motion model to compensate the influence of the delay of miss distance on the tracking performance of the system.Based on the selection of control system components,the hardware design and debugging of servo control system are completed.The software design of the control system which is based on Dos is completed.Finally,the experimental verification based on the servo turntable control system shows that the tracking effect basically meets the design requirements.