The Design Of Spacecraft Mission Analysis System Based On Mission Control Sequences

Analysis and simulating of Spacecraft missions are not only essential preliminary work but also essential for the successful progress of the entire task in satellite applications, lunar exploration, manned space missions.Chinese aerospace activities had achieved rapid development in all aspects in recent years. Chinese aerospace activities have become increasingly frequent, space mission analysis and simulation had become increasingly important. But Chinese used American STK software to do the space missions’ simulation in a long term. The problem is that we lacked an open source system that can do spacecraft missions’ analysis and have independent intellectual property rights.The forbidden of new version STK made the situation even worse. Addidionally, independent research and development task analysis system platform fit the needs of Chinese aerospace special tasks better.The purpose of this paper is to design a spacecraft missions’ analysis system software which can be used in simulation of complex space missions in China.The design of spacecraft missions’ analysis system is not easy beacause of many facts such as complex perturbation, multi-stage space missions, complex logic, high visual requirements, big system framework and so on.Firstly, the article summed up the needs to overcome the difficulties through analyzing the characteristics of the space missions. Then I completed the orbit calculation through researching the perturbative force and designing the orbit algorithm. The paper used task control sequences to solve the complex tasks’ simulation problems. The paper designed the missions’ commands and decomposed the complex missions to task queueses. The queues were put into sandbox to execute. This process is called mission control sequences.I used OpenGL interface to complete mission three-dimensional display dynamicly.I completed the system through studying STK and other softwares, so the system could be stronger and could have more functions.The functions that can be done includes: orbit calculations; complex space mission serialized execution; dynamic result display; customizable output reports. In order to verify the functionality of the entire system, I compared the calculate results with STK to verify the correctness of the algorithm. I analyzed each module’s time-consuming so the right model could be chosen based on dynamic real-time and accuracy requirements. At last I designed a complex earth-moon transfer tasks to verify the functionality of the entire system.