数字孪生技术综述分析与发展展望

随着数字化与仿真技术的发展，数字孪生技术已成为各行业的新兴研究热点，面对航天高质量、高效率和高效益的发展要求，有必要深入研究数字孪生技术的内涵及其关键技术，以便更好地研究探讨航天领域相关数字化仿真技术未来的发展方向。对数字孪生概念、数字孪生关键技术及研究现状进行了系统总结和分析，提出了航天领域数字孪生技术研究及应用领域发展展望。

Analysis and Perspective on Digital Twin Technology

With the continuous development of aerospace technology, the payload puts forward the task requirement of long-coast flight for the cryogenic upper stage. The long-term store of cryogenic propellant is difficult because of its low boil temperature and easy evaporation properties, so that the position management,the heat management of cryogenic propellant and the power supply have become the key issues that must be solved for long-coast flight. This paper reviews the task requirements and challenges of long-coast flight, analyzes the key technologies such as propellant position management, propellant heat management and integrated vehicle fluids of cryogenic propellant management for long-coast flight, and respectively puts forward the development suggestions for extending coasting time to 6 hours and longer of Chinese cryogenic upper stage.