雷达天线测向及定位控制系统.docVIP

毕 业 论 文（设 计） 题 目 雷达天线测向与定位控制系统 英文题目 Radar antenna direction finding and positioning control system 院 系 专 业 姓 名 年 级 指导教师 2014年 5 月 摘 要 正常雷达天线伺服的控制系统的通用雷达天线伺服定位和跟踪功是脉冲射与回波脉冲之间的时间差，电磁波以光速传，就换算成目标的距离。目标位置的测量是用锋利的光束位置测量天线。在仰角波束测量高程测量。目标是根据高度和距离高度计算。测量速度的原理是根据多普勒效应频率之间的相对运动产生的雷达和目标。目的回波频率和雷达辐射频率雷达复苏是不一样的，两者之间的差额称为多普勒频率。从多普勒频率中取的之一是雷达与目之间率。。Radar antenna direction finding and positioning control system Abstract General radar antenna servo control systems requires constant destination and tracking functions. High precision destination control, fast replay, constant track for a smooth operation. The actual measured removing is a method of the radar transportation pulse and the echo pulse time is not same as the electromagnetic wave because of the speed of light, whereby the target can be spread into precise distance. Measuring goal orientation is to use a sharp azimuth beam antenna measurements. Measuring elevation by narrow elevation beam measurements. We can calculte the target to know the Elevation and distance . Measurement speed is between itself and the target based on radar frequency Doppler effect principle has generated relative motion.The target and the radar transmit frequency of different frequency can receive radar echoes , the Doppler frequency difference between the doppler.The Doppler is the rate of the change in the distance between the radar and the tagget extracte a important information。When the target and noise to exist in the same spatial resolution of the radar unit, using different radar clutter from the interference between them Doppler frequency target detection and tracking. Through Siemens programmable controller to control the servo motor to achieve control radar function. Key Words：radar；Servo Control System；programmable logic controller Abstract II 1 雷达的结构组成 1 1.1 雷达简介 1 1.2 军事雷达的分