Research on Acceleration Displacement Algorithm in Rocket Sled Test

Using rocket sled test to carry out short-range radar acquisition test is an important means to test the acquisition speed and anti-jamming performance of short-range radar at real speed. The radar is placed on the upper part of the rocket sled, and a large deflection will occur when the rocket sled runs at high speed. The vibration sensor is installed at the position of the radar transmitting antenna to calculate the whole swing through integration, so as to ensure that the radar lobe covers the captured body in the sliding process. The purpose of this study is to eliminate the system error through zero compensation, reduce the influence of low-frequency signal on quadratic integration through low-frequency attenuation algorithm, and eliminate the system random error through the adaptation of empirical mode decomposition (EMD) to non-stationary signal. The results show that through the above algorithm, the peak deviation of position data obtained from acceleration integration is less than 5%, which meets the needs of engineering. These innovative algorithm combinations can be applied to other occasions that need to obtain velocity and displacement from acceleration data integration, which is of great significance.