Research On Deployment System Of Thin-film Solar Cell Stretched By Lunar Rover

Lunar base is the foundation of long-term science research on the moon,and also the key point of deep development and application of the moon. So constructing a lunar base is one of the significant missions in future lunar exploration. The operation and maintenance of instruments and equipments in the lunar base need enough energy. An adequate and stable energy supplying system is the foundation of the construction of lunar base. Power station on the lunar surface is one of the solutions to energy supply for future lunar base. This paper proposes a thin-film solar cell power station in lunar base using lunar lander and lunar rover, and discusses the potential problems during the construction of the power station.Through the analysis of the environment of the landing area on the moon and the energy need of a small scale lunar base, the technical index of the power station is confirmed and the design of some power station schemes is carried out. Based on the comparative analysis of various schemes, a thin-film solar cell power station stretched by lunar rover has big engineering feasibility. The deployment process is deeply analyzed and the capacity of the power station is estimated. After the analysis of the need of the deployment system, a mechanism scheme with four degrees of freedom is designed.According to the mechanism scheme, the kinematic model of the pulling arm is built based on D-H coordinate and the dynamics model of the pulling arm is built based on Laggrange equation. The mechanism of the prototype of the deployment system is detailedly analyzed, designed, processed and assembled. Then based on upper-lower computer model, the control system of the prototype is designed and built. To accomplish the tasks such as motion control, sensor data acquisition, this paper develops DC-motor driver and data acquisition card based on PCI bus. Using Visual C++, software of the control system is developed to program deployment motion.Using the dynamics model, The attitude stabilization control algorithm in spreading thin film is designed based on double closed loop PID algorithm and Back_Stepping algorithm. To optimize the control algorithm, mechanical and electrical integration simulation using Matlab and Adams is carried out. To confirm the function of elements of the deployment system and the feasibility of the thin-film deployment system, some unite level tests and spreading thin film test are carried out.