用于三角翼气动控制的MEMS微致动器

On Exploring Suitable Micro-Actuator for Aerodynamic Control of Delta Wing

结合三角翼气动特征 ,介绍了两种用于三角翼前缘涡控制的 MEMS微致动器 ,它们通过扰动边界层的分离 ,打破三角翼前缘分离涡的对称性 ,从而产生控制力矩。描述了微气泡致动器的工作原理、薄膜材料的选择以及结构工艺。利用计算流体力学软件对微气泡致动器阵列扰动下三角翼前缘涡的变化情况进行了数值仿真 ,进一步验证了控制方案的可行性。

Two possible types of micro-actuators for controlling delta wing are found: micro balloon and permalloy magnetic. This paper aims to compare these two types and decide which is more worthy of a further R and D effort into. The reasons for selecting the micro balloon actuator are presented. The permalloy magnetic actuator is analysed. We find that the contradiction between its flexibility and strength is difficult to reconcile and that it may not function due to the dust. Thus we deem that the permalloy magnetic actuator is not quite suitable. So the micro-balloon actuator is analysed: the analysis of membrane material of balloon, micro-fabrication and structural dimensions does not uncover any particularly difficult problem; CFD (computational fluid dynamics) simulations, carried out about micro-balloon actuator's influence on vortex and pressure distribution on the upper surface of delta wing, show that its control capability is acceptable. Thus we deem that the micro-balloon actuator is more worthy of a R and D effort.