Abstract: Considering that the landing process of Mars exploration mission is high dynamic, especially the parachute opening in the thin atmosphere of Mars will cause violent shaking of the probe,the Tianwen 1 probe has developed a high dynamic landing inertial navigation system, including product design, timing analysis and navigation algorithms. In order to verify the performance of the Tianwen 1 probe high dynamic landing inertial navigation system, the upper air parachute opening test by a rocket is designed to simulate the parachute opening condition of Mars. The navigation results show that the design of the high dynamic landing inertial navigation system meets the requirements of the Mars exploration mission.

Key words: Tianwen 1 probe, Mars exploration, High dynamic, Inertial navigation system, Inertial navigation test