机载位移传感器故障检测与信号重构

为了避免机载系统故障诊断与重构中单纯增加余度数目所带来的问题，针对电传飞控系统中应用较多的位移传感器，提出了一种基于特征的检测电路、检测方法以及信号重构方案。方案基于位移传感器工作时两次级线圈回路电压和值恒定的特征，实现了对初级、次级回路的一次断线检测，在检测到次级线圈一次断线时，又利用正常工作特征并根据另一次级线圈所获得的信息对断线信号进行重构。分析和测试表明，所提出的位移传感器故障检测以及重构算法仅需增加极少的硬件电路，且检测及重构方法实时性高，在不增加传感器余度数目的条件下，能大大提高系统的可靠性。

Airborne Displacement Sensor Fault Detection and Signal Reconstruction

The primary goal of this research is to put forward a feature detection circuit, detection method and signal reconstruction strategy to the most used displacement sensors of FBW flight control system, and thus solve the problems which the redundancy technology has brought in fault detection and reconstruction. By utilizing the characteristic of constant sum voltage of the two second parts, the one-time wire break detection of primary part or second part is achieved, and then sensor signal is reconstructed when one-time wire break occurred in any second part. Analysis and test result shows that the proposed fault detection and reconstruction algorithm for displacement sensor need only a little part of hardware, and which can achieve real-time detection and signal reconstruction without using redundant component, therefore it can greatly increase system reliability.