某型雷达导引头灵敏度下降故障诊断分析

摘要

Sensitivity decline is an ordinary trouble in missile radar .In this paper ,a detailed diagnostic analysis of sen-sitivity decline of certain type missile radar is conducted .Fault location is an error transmitter trigger caused by an abnormal ignition pulse when the seeker working on the high voltage condition ,which caused by the cutoff of the high and low voltage power at the same time ,and then the trigger leads the LAN damaged suffering from over power input .Troubleshooting measure that cutting high voltage after low is put forward ,when the seeker is in use .Finally ,summarization of problem is given .%灵敏度下降为雷达导引头常见故障之一，论文对某型雷达导引头出现的灵敏度下降故障进行了详细诊断分析，故障定位为导引头在高压工作状态时，因高低压同时断电产生了异常点火脉冲引起发射机误触发导致低噪声放大器经受了过功率输入而损坏，提出了导引头使用时先断高压后断低压的故障排除措施，最后对问题进行了总结。