The Research Of Landing Ladder And Loading Equipment

The landing ladder plays a key role in the system for Lunar Rover's landing, it is an important link of the Lunar Rover's getting to the surface of the moon. In the processes of landing, the landing ladder is required to be unfolded successfully and land smoothly. A new type of foldable structure for the landing ladder is researched, and the simulation of landing ladder's working process is included in this paper. The processes of ladder's free falling needs the load equipment to control the speed. This paper researches a new predominant variable torque clutch-hyperboloid clutch with rollers whose core component is the hyperboloid bearing. There are two hyperboloid bearings which are disposed symmetrically in this new clutch which can achieve convert mutually between force and torque. This clutch can control the speed of the landing ladder.This paper establishes the geometry model of hyperboloid clutch's race surface with differential geometry and the combined contact geometry equations are provided. The mechanics model is established and the motion relationship between the sliced rollers and the surface of this clutch is provided. The force equilibrium is analyzed and validated. Since the torque is variable in this hyperboloid clutch, the influencing factors to the mechanics performance caused by every parameter of the clutch are researched in this paper.Based on the requirement and the parameters of the landing ladder, this clutch is improved and at the same time the axial force loading system, torque testing system and speed regulating system are designed to carry out the mechanics performance test. This paper analyzes the error of the experimentation results and the problems existed are discussed.Adams simulation for the landing ladder with clutch is carried out in this paper. The conditions for ladder's successful unfolding are provided such as the parameters of the spring, the position and the numerical value of damping force. This paper analyzes the curves of the speed and the acceleration of the landing ladder, and provides the data base which can be used in the following experiments.