Dynamics and Control of Smart Structures for Space Applications

近年来，智能材料由于具有响应速度快、易于小型化、可控性高等优异性能，在空间领域得到了越来越广泛的应用。在过去的二十年里，智能材料在执行器设计中的使用迅速增加。然而，智能材料固有的非线性阻碍了应用范围，并提出了一个有趣的控制挑战。 在这项研究中，我们将重点研究两种类型的智能结构：压电陶瓷和形状记忆合金。我们将利用智能结构研究三种空间应用，包括(1)柔性航天器的振动主动控制；(2)空间仪器的超精密定位；(3)薄纱航天器的主动形状控制。 我们将研究几个动力学和控制问题，包括有效的主动振动控制器、精确的非线性建模、非线性控制器设计、运动同步控制器设计、起皱预测和有效的主动形状控制器设计等。 这项研究的主要目的是推进智能结构在空间应用中的动力学和控制技术。

Recently, smart materials have been utilized more and more extensively in space applications due to their excellent properties such as fast response, easy miniaturization and high controllability. The past two decades have seen a rapid increase in the use of smart materials in actuator design. However, the inherent nonlinearity of smart materials hinders the scope of the application and presents an interesting control challenge. In this research, we will focus on two types of smart structures: piezoceramics and shape memory alloys. We will investigate three space applications using smart structures, including (1) active vibration control of flexible spacecraft; (2) ultra-precision positioning for space instrumentation; (3) active shape control of gossamer spacecraft. We will examine several dynamics and control topics including effective active vibration controller, accurate nonlinearity modeling, nonlinear controller design, motion synchronization controller design, wrinkle prediction and effective active shape controller design, etc. The main objective of this research is to advance the dynamics and control technologies for using smart structures in space applications.