Numerical Simulation of Strapdown Inertial Navigation System

The numerical simulation of strapdown inertial navigation system is investigated in this paper based on the planning track data of an anonymous missile.The specific force and angle velocity of the missile body extracted from the data are input to module of inertial measurement units(IMU),then the navigation parameters computation module is feeded by the output of IMU,finally,the navigation states:positon,velocity and attitude angle are calculated.The navigation state errors are attained by subtracting planning track from the caculated one.Meanwhile,the equations of inertial navigation system error is simulated.The difference between computed state errors and simulated ones is quite small,then the numerical simulation of strapdown inertial navigation system is proved to be correct and valid.