Abstract:

Focusing on the key dynamic problems of a Mars probe in the entry, descent and landing (EDL) stages, the detailed dynamic models including the entry of the probe, the deployment, inflation, and steady descent for the parachute are built. The dynamic characteristics of the Mars entry trajectory are analyzed based on the 6-DOF model, the initial simulation conditions of the parachute deceleration are achieved by the ascendant adaptive opening control method, and the dynamic characteristics of the parachute′s deceleration are investigated by the empirical models of the parachute′s deployment and inflation and the 9-DOF multi-body model of the parachute-body. Finally, an integration simulation framework of the EDL is established based on the object oriented design language, achieving parametric modeling of the EDL whole process from the Mars entry point to landing point. The results of this paper could be applied to effectively predict the dynamics of the Mars EDL process, and guide the integration design analysis of a Mars landing system.

Key words: Mars exploration, Parachute dynamics, Aerodynamic deceleration, Integration simulation