Research On Method Of Photographing Lunar Lander

Luna, as the only natural satellite of the earth, is the first target for man to conduct deep space exploration, as well as an ideal base for outer space exploration. Luna, which is rich in mineral resources and has unique space environment, has a broad prospect of development and utilization. Lunar exploration has propelled the development of several new technologies, especially as space technology、information technology and optical technology. The most direct and efficient way of lunar exploration is to land on the moon. Photos of the lunar lander and the environment around it can help monitor the lunar lander’s working condition, so it is meaningful to develop methods for a lunar lander to take photos of itself.This paper firstly introduces the background of lunar exploration, and the development status of lunar exploration programs in home and abroad is summarized. Several methods of taking pictures of landers are introduced, their advantages and disadvantages analyzed. A new method of photographing lunar lander, which is simple and easy to achieve, is introduced in detail.Then requirements of imaging system are analyzed. An optical system is designed, and the imaging quality is analyzed. Tolerance analysis of the optical system is conducted and the results demonstrated. Then the structure of lens cone is designed.The design of structures of the tumbler and the ejector is introduced in detail. Design principle of the structure of the tumbler is analyzed, as well as the operating principle of the ejector. Designs of the components of the system are demonstrated. Design principle of the spring is introduced, and design parameters meeting the requirements of the ejection system are demonstrated. The principle of finite element method is introduced, and finite element analysis of the tumbler during the impaction is conducted.Components of the system are manufactured and experiment of the system is conducted in the realistic environment, and the result verifies the feasibility of the system. Methods of distortion are summarized, and a method based on the polynomial fitting is introduced in detail. The experimental result verifies the effectiveness of the method.