The ‘promise’ of smart materials for small satellites

In this paper the potential use of ‘smart’ materials to improve the performance and cost efficiency of small satellites is introduced. The basic operating performance of the structural smart materials are reviewed as are some of the foreseen application areas. The state of the art in applying smart materials for use in space is then discussed with a focus on areas where information is lacking. A series of actions to alleviate these shortcomings are proposed and some current activities of the DLR-Institute of Structural Mechanics to answer these calls for action are highlighted.     

智能桨叶的实时模型与复合自适应振动控制

研究了智能桨叶的实时模型、控制方法与控制器的实时实现。首先,采用MX滤波器实现了对桨叶动态特性的实时在线模拟,给出了该滤波器的系数与所描述的受控结构模态参数之间的相互关系。接着,提出了一种新的复合自适应控制方法,它综合了自适应前馈控制和反馈控制的特点,实现了对桨叶阻尼和振动响应的控制。最后,在所建立的以高速信号处理器为中心的实时数字仿真系统上,实现了对单频、双频及变频、变幅值谐和激励下桨叶振动的控制,获得了良好的振动控制效果。