The Dynamic Simulation Of The Detector-parachute Coupling On Mars

Mars exploration is a long-term planning of deep space exploration. Deceleration parachutesystem is one of the most important equipments. The detector–parachute system coupling dynamicsproblems were studied in present paper during the landing process.Firstly, according to the model to establish the corresponding coordinate system, analysis thedynamics model of parachute-detector coupling on Mars, the dynamical equation of detector andparachute are derived in this paper. Secondly, the dynamic simulation of the parachute deployment inthe Mars environment is analyzed, and on the basis of the theories of dynamics of the multi-body, adynamic model is built by dynamic simulation software to analyze the motion characteristics of thesystem during its deployment process, including detector speed, attitude, displacement and otherrelevant parameters. And also the aerodynamic calculations of the Mars Pathfinder detector arecarried out in this paper. Aerodynamic characteristics of the detector at different angles of attack werecalculated. Then the dynamic numerical simulation is carried though by adopting method offluid-structure coupling theory during parachute opening process. The curve of the drag coefficientversus time, the resistance area versus time and the overload versus time are obtained through thissimulation. Finally, a multi-body dynamics model used in the inflation and steady decline process ofthe Mars parachute is established the motion characteristics of the system of parachute inflation andsteady decline process in the Martian environment is analyzed through simulation.Some valuable conclusions are gained by the simulation, which provides a good reference for ourdevelopment of parachute dynamics of the Mars detector system.