ACTIVE CONTROL OF ULTRALIGHT-WEIGHT AND FLEXIBLE SPACE STRUCTURES

超轻且灵活的空间结构的主动控制

• 批准号: 12450396
• 负责人: OKUBO Hiroshi
• 金额: $ 1.73万
• 依托单位: OSAKA PREFECTURE UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12450396/
• 关键词: FLEXIBLE SPACE STRUCTURES; ACTIVE CONTROL; VIBRATION CONTROL; CONTROL; STRUCTURE DESIGN; SMART STRUCTURES; ROBUST CONTROL; FAULT DETECTION; PEZOELECTRIC DEVICES

In this research project, the use of smart structural systems has been proposed for space structures such as large flexible space antenna, where many active sensor and actuator devices are imbedded onto the structures for precision control, shape determination, and vibration suppression. The project also includes the development of software algorithms for fault detection and identification because there exists the need for developing highly reliable control systems for on-orbit application of such smart structures.(1) Studies on Controller Design for Flexible Space Structures1-1 Methods of controller design have been developed for shape and vibration control of highly flexible structures. Intensive studies have been carried out emphasizing robustness of the control system against both spillover instability and uncertain structural parameters.1-2 A method of vibration control for flexible structures with piezoelectric actuators has been developed. Sliding mode control has been applied t … More o the model of a cantilever beam with parameter errors. The designed controller shows high performance of robustness against the model errors.1-3 Simultaneous optimal design problem has been solved to find the best set of structural parameters and output controller. The proposed design method is based on Bilinear Matrix Inequality (BMI) and presents an improved branch and bound method for BMI by using graph theory. The method is useful for simple structural systems with low degrees of freedom. Further studies are needed for the simultaneous optimal design of structural/control systems in the case of more complex structures.(2) Fault Detection and Identification for Smart Structure Control SystemsModel-based FDI (Failure Detection and Isolation (FDI) systems for smart structures have been studied with careful considerations about robustness with respect to model uncertainties. A new method of robust fault detection has been proposed that is insensitive to the disturbances caused by unknown modeling errors while it is highly sensitive to the component failures. The capability of the robust detection algorithm is examined for the sensor failure of a flexible smart beam control system. The proposed method suppresses the disturbances due to model errors and remarkably markedly improves the detection performance. Less

在本研究项目中，提出了将智能结构系统用于空间结构，如大型柔性空间天线，在结构上嵌入许多主动传感器和执行器，用于精确控制、形状确定和振动抑制。该项目还包括开发故障检测和识别的软件算法，因为需要为这种智能结构的在轨应用开发高度可靠的控制系统。(1)柔性空间结构控制器设计研究1-1针对高度柔性结构的形状和振动控制的控制器设计方法。人们进行了深入的研究，强调了控制系统对溢出不稳定和不确定结构参数的鲁棒性。1-2发展了一种带有压电致动器的柔性结构的振动控制方法。滑模控制在…中的应用更详细地介绍了具有参数误差的悬臂梁模型。所设计的控制器对模型误差具有很强的鲁棒性。1-3同时优化设计问题，寻找最优的结构参数和输出控制器。该设计方法基于双线性矩阵不等式(BMI)，并利用图论提出了一种改进的BMI分枝定界法。该方法适用于低自由度的简单结构体系。(2)智能结构控制系统的故障检测与识别研究了基于模型的智能结构故障检测与隔离系统，并考虑了模型不确定性对故障检测与隔离系统的鲁棒性。提出了一种对未知建模误差引起的扰动不敏感，但对元件故障高度敏感的鲁棒故障检测方法。以柔性智能梁控制系统的传感器故障为例，验证了该鲁棒检测算法的有效性。该方法抑制了模型误差带来的干扰，显著提高了检测性能。较少