方位角测量跟踪系统设计及实验  

Design and experiment of tracking and detecting system for azimuth

作　　者：肖影[1] 金龙旭[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所

出　　处：《光学精密工程》2007年第5期741-745,共5页Optics and Precision Engineering

基　　金：国家重大创新计划基金资助项目(No.ZB99I14H)

摘　　要：为了使跟踪设备快速、准确地跟踪飞行目标并精确测量目标方位角,设计了一种测量跟踪系统,该系统根据跟踪设备发出的方位角偏差信号推动带有跟踪设备的伺服转台,驱动子系统采用H型双极模式PWM电路驱动伺服转台的直流电机以提高响应速度。使用测速机反馈速度信号以提高系统稳定性,使用高精度编码器输出目标方位角信号以提高测量精度。提出了系统动态传递函数,并对传递函数进行分析,给出了仿真动态曲线并计算动态参数。计算了电路的开关频率及延迟时间等关键参数。通过实验得到系统阶跃响应的位移曲线和速度曲线以及其他实验结果。实验结果显示,系统随动精度为0.1(°)/s,最大跟踪速度为38.3(°)/s,最大跟踪加速度为23.5(°)/s2,满足了技术指标和设计要求。A system for tracking and detecting flying object rapidly and exactly is designed and the accurate azimuth of the flying object is obtained synchronously. In this system, the azimuth error signal from detecting devices drives a servo running flat with detecting devices and an H-type bipolar PWM project is used in driving subsystem to drive DC motor in the servo running flat to improre response speed. A speed-detected motor is used to get speed feedback signal for better stability. A high precision encoder is adopted to get azimuth signal of flying object for higher measure precision. For analysis on system dynamic transfer function, the dynamic curve is emulated and dynamic parameter is calculated, also switch frequency and delay time are given. Displacement curve and speed curve of step response and other results of the system are obtained by experiment. The results indicate that the system can meet the technique requirements, it shows the excellent parameter in dynamic precision of 0.1°, max tracking velocity of 38.3 （°）/s and max tracking acceleration of 23.5 （°）/s^2.

关 键 词：光电跟踪 方位角测量 PWM电路 开关频率 延迟时间 

分 类 号：V556.5[航空宇航科学与技术—人机与环境工程]