薄膜子镜张紧装置直接影响下一代空间拼接镜面望远镜的观测性能。传统多驱动器协同方案不具备中、高频微振动隔振功能，且所需辅助设备过多，会造成系统质量、尺寸过大,能源损耗、在轨维护负担过重等问题。采用磁致伸缩驱动和柔顺机构技术能为上述问题的解决提供一种新途径。为此，本项目重点围绕下述内容展开：首先，进行柔顺张紧装置方案设计，建立参数化输出传递函数模型和振动传递函数模型，研究结构参数与输出性能和隔振性能间的量化关系，揭示柔顺张紧装置的协同隔振机理；其次，分析系统能量传递过程，建立磁致伸缩驱动到柔顺张紧装置的电-磁-机耦合能耗模型，阐明各参数与能量损耗间的影响规律，提出兼顾输出、隔振与能耗的优化设计方法；最后，建立全系统刚柔耦合动力学模型，搭建系统仿真框图和实验测试系统，进行协同隔振机理及优化设计验证。本研究可为磁致伸缩柔顺张紧装置的协同隔振及优化提供理论支撑，并为其在薄膜子镜领域的应用奠定基础。

The tensioning device for membrane sub-mirror directly affects the observation performance of the next generation space telescope with segmented mirrors. The traditional multi-actuator cooperative scheme could not suppress the medium and high frequency micro-vibration, meanwhile could cause problems such as overweight and oversize of the system, excessive energy loss and overburdened on-orbit maintenance and so on. Aiming at these problems, a new way by combining of giant magnetostrictive actuator and compliant mechanism is proposed in this research. Firstly, the principle scheme of the compliant tensioning device is designed, and the corresponding parametric output transfer function model and vibration transfer function model are established respectively, in order to reveal the quantitative relationship between structural parameters and performances, as well as the collaborative vibration isolation mechanism. Then, the energy transfer process of the system is analyzed, and the electric-magnetic-mechanical coupling energy consumption model is constructed, in order to investigate the influence rule between structural parameters and energy consumption and propose the optimization design method considering output performance, vibration isolation performance and energy consumption. Finally, the rigid-flexible coupling dynamic model of the whole system is established, and the feasibility of collaborative vibration isolation mechanism and optimization design method could be verified by building system simulation block diagram and experimental test system, respectively. This study is capable of providing theoretical support for the collaborative vibration isolation mechanism and optimization design of compliant tensioning device driven by giant magnetostrictive actuator, meanwhile lay the foundation for its application in the field of membrane sub-mirror.