基于小波分析的故障检测技术研究

针对导航系统所存在的软故障及其特性，并结合小波信号分析的特点，提出了基于小波分析的组合导航系统故障检测的方法，采用该方法对含有软故障的组合导航系统信息的量测信号进行处理与分析，从而达到故障检测的目的，将此方法应用于捷联惯性导航系统／全球定位系统（SINS／GPS）组合导航系统的故障检测。对仿真结果的分析表明，该方法可以检测出组合导航系统的所存在的软故障，并且更加简便灵活，效果明显。

Research into Fault Detection Technique Based on Wavelet Analysis

Aiming at the existent soft fault and its characteristics in navigation system,this paper puts forward the method to detect the fault of integrated navigation system based on wavelet analysis combing with the characteristics of wavelet signal analysis,uses the method to process and analyze the measured signal of the integrated navigation system information containing the soft fault,thereby achieve the goal of fault detection,adopts the method to detect the fault of strapdown inertial navigation system(SINS)/global position system(GPS) integrated navigation system.The analysis to the simulation result indicates that the method can detect the existent soft fault in the integrated navigation system,and is more simple and agile,the effect is obvious.