随着卫星技术的发展，卫星应用产业的市场准入限制逐步放宽，面对发展较成熟的欧美卫星技术强国的市场竞争压力，大力发展低成本、高性能卫星研制技术已成为提高我国空间技术核心竞争力的有效途径。常规以保守性设计换取可靠性的设计手段使得卫星“高性能”和“低成本”成为显著的矛盾。极端重视设计余量的保守性设计其根源是对卫星生命周期内的不确定性因素认识不足和相关动力分析方法的欠缺。面向该问题，本项目在分析参数不确定性对卫星结构固有特性影响的基础上，重点研究混合不确定性因素条件下卫星结构系统的随机振动响应分析方法和面向空间环境的动载荷识别方法；在理论研究的基础上，针对实际的卫星产品，结合以往相关型号产品的试验数据，对本项目提出的方法及理论进行验证及应用研究，验证所提出方法的正确性和有效性。

With the development of satellite technology, restrictions on the satellite applications industry' entering the market are gradually being relaxed. Under the pressures of market competition from Euro-American big powers with more mature satellite techniques, doubling down on the development of satellites of low cost and high performance has become an effective channel for improving the core competence of our space industry. However, conventional design methods which ensure reliability by conservative design create an obvious contradiction between high performance and low cost. Further, the root cause of design margin's holding an essential position in the conservative design lies in deficient knowledge of uncertainty factors in the whole satellite life-cycle and in lack of the related dynamic analysis methods. Aiming to solve this problem, this project firstly analyses the influences of uncertainty factors on the inherent characteristics of satellite structures. On that basis, this project focuses on research of random vibration analysis and on-orbit dynamic loads identification for satellite structures with mixed uncertainty. Finally, the proposed dynamic analysis methods will be applied to analysis of real satellite products in which ground test data and flying test data are involved. The validity and correctness of the proposed theory and analysis methods will be proved accordingly.