Establishment of Altitude and Velocity Measurement Arithmetic Model for a Lander

Abstract

For successful landing of large lander, active control of lander and reliable landing are essential. The data of altitude and velocity between the cabin of the lander and the ground should be obtained accurately. In the stage of landing power descending, each wave beam direction of radar is designed reasonably according to landing control system, so that a radar waveform for altitude and velocity measurement is proposed. Based on the analysis of the waveform, an arithmetic model for measurement of altitude and velocity is established. Simulation and experimental results manifested that this model could meet the accuracy requirements.