Research On Scheme Design And Key Techniques Of The Soft Landing Buffer Mounted For The Lunar Detector

Lunar is the nearest planet to the earth. There are many special resources, which is available for development and utilization to human beings, and thus the development and utilization of lunar is of great significance for human's future. Currently many developed countries have begun their own lunar exploration program, following the successful manned spaceflight, China has also launched lunar exploration program-the"Chang'e Program". One of the most essential issue to be taken into account in the entire program is to achieve a soft landing of the lander on the lunar successfully, so the lunar detector buffer technology working on in the thesis is significant for China's lunar exploration program and other further space exploration activities.Because of constraints of the lunar detector storage space, the contraction extended shelf-style structure is used as the structure of lunar exploration soft lander, and the 3D models of three separate shelves and four separate shelves lander were established respectively based on the function of each part. Main structure forms of Lunar detectors at home and abroad were cross-compared, the performances among four separate shelves lander, three separate shelves lander and complex truss soft lander was analyzed, such as technical implementation, landing stability, weight load carried, landing overturning rebound, and other aspects.Based on the model of the four separate shelves lander developed in this thesis, the dynamics model of the soft lander was simplified, and the three-DOF mathematical model was also established on this basis accordingly. Three-DOF dynamic analysis was done, the force were solved with deformation of materials during the process of landing for lander. An important process parameters-overturning angle during landing has been demonstrated that a soft lander would not capsize when landing on the 15°bevel surface of the lunar.The dynamic simulation of the established soft lander model was finished, the main parameter of simulation was designed, especially for landing on the horizontal surface and 15°bevel on the lunar. The soft lander program and model's correctness and feasibility were proved in two aspects of the main pillar's buffer load and the itinerary change and the shock acceleration of centroid.Finally, aimed at the key components of the lander-buffering mechanism, the honeycomb aluminum was used as buffering material and the spring-gear mechanism was designed, which can achieve self-repair of landing attitude. The deploy-locking mechanism mounted on the assistant pillar was designed, which can achieve the total deploy of the soft lander before landing.