某型无人机归航目标距异常原因分析及改进

Reason Analysis and Improving about a Certain Type UAV Abnormal Homing Object-distance

针对某型无人机在使用过程中出现的归航目标距异常现象,从目标距计算原理及飞控导航微处理器工作机理入手,分析了异常现象发生的原因,定位了产生故障的源头,得出了归航目标距异常是由GPS定位原点数据漂移所致的结论,采用对GPS原点定位数据进行双重备份比较判读的方法加以改进,完成了地面静态拷机、发动机启动试车及动态飞行试验。试验结果表明归航目标距显示正常,故障得到解决,同时也表明故障原因定位准确以及改进方法可行有效。

Aimed at the problem that a certain type UAV（unmanned aerial vehicle） homing object-distance turns abnormal in the process of operation,beginning with the object-distance principle and the flight control navigation microcomputer working procedure,the reason which caused the abnormal phenomenon is analyzed,and the fault location is fixed,and the conclusion is found out that the abnormal phenomenon was caused by the data deviation of the GPS location initial point,and the improved method that double backups the data of the GPS location initial point is presented,and the ground static measure,the firing test and the dynamic flight test are finished.The test results indicate that the homing object distance displays normally,and the fault is removed.The fault cause is fixed correctly,and the improved method is feasible and practical.