自适应可展结构的理论与实验研究

This project is to develop theory of adaptive deployable structures improving dynamic performance of the structures and to solve some key technological problems such as design, dynamic analysis and deploying control of the structures. The concept and principle of adaptive deployable structures were presented. The new intelligent members were designed and manufactured with functions of sensation and actuation in order to control and improve performance of the deployable structures adaptively. The design theory and method of the piezoelectric active members were developed based on the actuation effect of piezoelectric materials, and the static and dynamic performances of the members were experimented. Based on the integrative design idea of control and structures, the dynamic model of mechanic-electronic coupling of adaptive deployable structures was established with joint clearances and member flexibility, and dynamics of the adaptive deployable structures were simulated to prove to be valid for using the active member to improve characteristics of the structure. An experiment equipment of the structures was set up and the relative experiments were finished. The shape memory alloy (SMA) was selected to construct the actuator of the grasping mechanism of the manipulator, and the electro-thermal driving mechanism of the SMA spring actuators was studied. The basic theory and experimental data of the grasping mechanism were presented to enlarge the application of SMA in the grasping mechanism. The research results of this project provide a theoretical base for design and analysis of deployable structures in new generation spacecraft.

本项目研究具有改善动力学特性的自适应可展结构理论，解决自适应可展结构的设计、动力学分析与模拟、展开控制、振动抑制、消除间隙等关键技术问题，揭示结构－控制相互作用机?，建立结构- 控制一体化设计理论。其研究成果将为新一代空间飞行器可展结构的设计与分析提供理论基础，从而支持和促进我国航天高技术的发展。.........