Modeling of three axis simulator based on xPC target

To satisfy the requirement of error evaluation in Hardware-In-Loop Simulation of missile, the modeling of three axis simulator was studied. First, experiment environment based xPC target and fiber-optic reflective memory was designed, second, the excitation signal was analyzed and selected by spectrum analysis, third, the generalized least square method was used to identify model of the three axis simulator, in the end, the model was verified by MESA. The result proves the model identified is trustworthy and can be used in the inaccuracy analysis in Hardware-In-Loop Simulation.