基于磁信号逆变技术的航姿系统综合检查仪设计

Design of Synthetic Detector of Bearing/Attitude System Based on Conversion Technique of the Magnetic Signal

描述了一种快速地检测飞机航姿系统全套及部件200多个信号的航姿综合检查仪。该检查仪采用斩波放大及逆变技术实现了微弱磁信号采集的数字化处理,系统航向、姿态检测精度从原模拟式检测设备的1°提高到现在的0.1°,与原模拟式检查仪相比,维护效率提高了5倍以上。应用小波去噪抗干扰技术,滤除交流电源产生的噪声,从而大大降低系统的漏检率和误警率,整套系统性能及可靠性大大增强。

A synthetic detector of the bearing/attitude system which can fleetly measure more than 200 signals from the whole and parts of bearing/attitude system is described in this paper. The detector implements the digital processing of magnetic signal acquisition by using chopper technique and conversion technology. Meanwhile, the test accuracy of the bearing/attitude is from l^of old tester to 0. 1% The maintenance efficiency of the new detector is increased more than five times. The noise which is generated by AC supply is filtered by wavelet denoising technique, thus the FPP （False Positive Probability） and FNP （False Negative Probability） are cut down abviously. The performance and rehability of the whole system are improved highly.