Power spectrum analysis for laser gyro damping system of strapdown inertial navigation

The dynamic model of multibody system was developed for the damping system of strapdown inertial navigation.The transfer equations and transfer matrices of the damping system were derived,and the overall transfer equation,the overall transfer matrix and the power spectrum density of the system response were obtained by Transfer Matrix Method of multibody system.The general method for vibration analysis and the proposed method were respectively used to obtain the dynamic responses of the damping system with random input.The feasibility and effectiveness of this method was verified by the simulation results.The method had numerous advantages of modeling flexibility and higher computational speed without developing global dynamics equations.Compared with other dynamic methods,the method was more beneficial to analysis for laser gyro strapdown inertial navigation system,and a new method has been provided for designing the damping system of strapdown inertial navigation.