Hierarchical Fault Detection Method in GNSS /INS Integrated Navigation System
Wang Xu-jin · Jisuanji fangzhen · 2014
According to the problem that traditional detect GNSS /INS integrated navigation system method costs large time delay and identify fault satellites,a hierarchical fault detection method based on least squares support vector machine( LS-SVM) was proposed on the basis of the structure of primary and secondaryfault detection. Building test statistic in hierarchical fault detection by using LS-SVM feedback value of the forecast can detect faults quickly and use subsystem information to maintain navigation work after promptly isolate fault satellites. The simulation result shows that this method can improve not only the ability of the fault tolerant in navigation system,but also the fault detection speed.