A Semi-Physical Simulation of RR/S Attitude Algorithm

For the rolling rocket/shell (RR/S) realizes the guidance control and improves the falling point precision, the spatial attitude of RR/S in the process of flight must be studied. This paper adopts the 902E-1 two-axis turntable to simulate the spatial attitude of RR/S, and uses the inertial measurement unit (IMU), which is fixed on the turntable by ensuring the axes of them to be aimed, to measure the 3-axis angular rate motion of the turntable. By setting the motion condition of the turntable, we can get the 3-axis angular rate data of the IMU and the 3-axis angular position data of the turntable. The attitude algorithm simulation of IMU adopts the four-sample rotation vector algorithm based on MTLAB/Simulink. The simulation results show that the semi-physical simulation method can model the spatial attitude of RR/S truly.