The Modular Functional Decomposition Method Research For Distributed Reconfigurable Satellite System

With the deepening use of space system applications, the flexibility and resist risk ability requirements for satellite are higher and higher. The distributed reconfigurable satellite system as a new spacecraft architecture. It’s by the way of "functional decomposition, structure separation, wireless connectivity, formation flying" to organize system. Which enhances system’s the flexibility and reliability significantly. And full life cycle cost and risk are reduced of the system. In this paper, the distributed reconfigurable satellite system’s module division method and its full life cycle cost are studied.Firstly, introduces research background, purpose and meaning of the distributed modular reconfigurable satellite system’s modular functional decomposition. And tracking the program of Pleiades, part of F6project. Also introduces the traditional satellite application system and its composition.Secondly, explains the concept of distributed reconfigurable satellite system’s module. Actually it’s a small satellite with a specific function. According to distributed reconfigurable satellite system’s overall functional. Combine the correlation and’function tree method to achieve the modular division of distributed reconfigurable satellite system.Then, aimed at distributed reconfigurable space-based remote sensing observation system design goals. This paper developed a mission scenario. Namely:to demonstrate LEO earth optical remote sensing satellite mission; to demonstrate a three SAR formation application system; to demonstrate real-time SAR data processing technology based on three SAR formation application system. Under the condition of accomplish the mission scenario. The launch schemes of distributed reconfigurable satellite system up to36.Then, studied distributed reconfigurable satellite system lifecycle value model. Mainly includes cost model and revenue model. And cost model which includes development costs, launch costs and operating costs. While considering the uncertainty factors bring the cost increases. Eventually gives the computing methods of net present value (NPV) for distributed reconfigurable satellite system.Finally, distributed reconfigurable satellite system life cycle value assessment software was completed. Users can input different mission scenarios according to actual needs. Then the system will generate a set of launch schemes. In this paper, through the lifecycle value assessment comparing of36kinds of distributed reconfigurable value satellite system launch schemes and single satellite launch. It’s demonstrated that the distributed reconfigurable satellite satellite system architecture is feasible and economic.