The Research Of Microminiaturization Drive Gear In Spaceflight

A new equipment, microminiaturization special drive gear for spaceflight is developed with spaceflight science technology developing. Because the main equipment, gear decelerator, it is a difficulty to achieve a large torque in the special decelerator. This problem blocks the use of the decelerator. So the gear decelerator is a great subject in spaceflight industry. This paper gives the design of gear decelerator in the special driving.Firstly, some decelerator types which can be used in special driving are analyzed in order to choose a right type. The adjustable gap bevoloid gear RV decelerator is chosen because of the size limit. This paper works out the torque,the transmission ratio,the efficiency and offer the theoretical foundation to the mechanism designing and simulation.Secondly, to achieve the suitable parameters of the decelerator, a new method mixed with PSO(Particle Swarm Optimization Algorithm) and GA(Genetic Algorithm) are used to optimize the system."Variation"optimization model is developed. It solves problems which are in machine optimization with PSO. For example, multiply variable, multiply constraint conditions, easily premature. The"Variation"optimization model is used in the optimization of gear decelerator successfully. It offers a method of optimization method in mechanical optimization.The mathematical models of the lost motion of the conical gear,the bevoloid gear and the reducer are presented in accordance with the structural features in order to ensure lost motion can meet the predetermining demand. Thereby, the precision class of gears can be determined to reach the required lost motion by using this models.Thirdly, when all the components are finished, they are assembled in the Pro/E and checked by the interference checking Model Block. The components are modified in order to go through the global interference checking. The Pro/E has a motion simulation Model Block to analyze the system's kinematics and make the dynamic interference checking. The analysis results are performed in chart. They are verified with the theory. The mechanism is adjusted by the checking results.Lastly, the main component are analyzed by the ANSYS in order to satisfy with the large torque of the decelerator. The different components use different methods to analyze. The result is compared with the theory. The design and simulation of the high efficient decelerator system are completed.