微热控百叶窗驱动器的分析与模拟

ANALYSIS AND SIMULATION OF ACTUATOR OF MICRO THERMAL LOUVER

提出一种适合微小卫星的微热控百叶窗驱动器,利用热电制冷片作为温控装置,利用高膨胀系数的金属作为活动部件,实现热控百叶窗的开合。建立了该驱动器的一维和二维物理数学模型,并利用有限元软件ANSYS对其工作过程进行了数值模拟。获得了其基本的性能特性。研究结果表明,与直接电加热双金属驱动元件相比,不同输入功率下,该新型驱动器的变形量分别为双金属的2．5-10倍,同时动作频率约为双金属的20倍左右。

A micro thermal louver＇s actuator was developed for micro-satellites, using thermoelectric modules as its thermal control component and high expansible metal as its moving component. One and two dimensional physical and mathematic models were established, the basic performance of the actuator was obtained by FE simulation with ANSYS. The results show that the displacements of the novel actuator are 2.5～10 times of the bi-metal controlled by directly electric heating and the moving frequency is 20 times of the bi-metal under different input power.