A Novel Design Of The Mast-type Radar Servo System

Radar servo system is the key component to ensure the radar on normal work. It plays an important role in detecting, locking and the characteristic parameter measurement of the target. The equipment, discussed in this paper, is one part of a new type of reconnaissance vehicle, therefore, the development of this servo plays a role in promoting equipment of a type of reconnaissance vehicle. This paper conducted a series of theoretical and experimental work of the radar servo system, combined with a reconnaissance vehicle Project. The goal was to design a digital radar servo system based vehicle mast, and meet the general requirements of the vehicle.After analysis of specifications and functional requirements,system architecture for the radar servo system is introduced in detail. The system uses a main co-modular design, which can be divided into radar servo control modular and data acquisition modular. The main control modular based on the Cygnal C8051F040chip can communication with the radar host through the RS-422interface in order to transport azimuth, elevation, control commands and so on. Furthermore, the equipments in vehicle can communicate with each other through the CAN bus. The data acquisition module based on C8051F340is used for acquisiting and processing the data from azimuth encoder and tilt potentiometer. It can achieve output of rotation angle, velocity informations and so on. The system drives the DC motor through the full bridge circuit, which is composed of PWM control module and MOS pipe, and realizes the radar antenna horizontal and pitching movement finally. The system adopts fuzzy PID algorithm in control system. Servo system realizes the correction operation via the PI controller, parameters can be simplified by simulation. The design meets the requirements of sector scanning, location and pitching motion from radar antenna.After the completion of the design, according to the technical and performance indicators, some corresponding methods for testing were designed. The key indicators can be tested by the special software which based on ZLG USB-CAN modular, developed with the visual C++6.0. Experiments show that each function of the servo system works well and the control performance is good.Overall, the design meets the using requirements of a particular model radar mounted on the vehicle’s mast, and has important application value.