Overall Scheme Trade-off Design of Chang’E-5 Mission

In response to the requirements of lunar sampling and return mission, based on the development of our country’s launch vehicle and the technical foundation in the first and second phases of the lunar exploration project, a multi-planned and multi-round iterative trade-off analysis has been made on the overall plan of the detector, the composition of the functional modules, the launch method, the flight process, etc., and the module composition, main flight process and “Chang’E-5” engineering design process of “Chang’E-5” detector have been gradually optimized and determined. The result fully proves that the scheme is in line with our country’s lunar exploration project development plan and aerospace technology development expectations, and thus is advanced and feasible. The NAFVO trade-off design method adopted in the design process can provide a useful reference for the design of complex and large-scale aerospace engineering schemes.