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USING LMI TECHNIQUES TO CONTROL INTELLIGENT STRUCTURES

机译:使用LMI技术控制智能结构

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Using intelligent structure for vibration control involvesrndistributed sensors and actuators and a control law, in orderrnto minimize or reduce the response at selected locations.rnThe technology for advanced sensors and actuators hasrnbeen gradually developed; hence, there is a growing needrnfor robust control algorithms, which can deal with uncertaintyrnand performance optimization. It is common to performrndynamic analysis on structures with many degrees ofrnfreedom. Although, numerical methods to compute modalrnproperties are available, modern control techniques can notrnall be expected to be robust for such systems. In this sense,rnthere is a great interest in reducing the size of the structuralrnmodel, while retaining good accuracy. However, the use of arnreduced order model of the plant can cause spillover effectsrnin the closed loop system. It is due to possible excitation ofrnunmodeled vibration modes. This paper presents a methodrnto design robust controllers for intelligent structuresrnconsidering control force input limits (PZT actuator) andrnseveral possible uncertainties in parameter values. Therncontroller design is formulated as a Linear Matrix Inequalityrn(LMI). The paper concludes with a fixed-fixed aluminumrnbeam application.
机译:使用智能结构进行振动控制涉及分布式传感器和执行器以及控制律,以最小化或减少选定位置的响应。先进的传感器和执行器技术已经逐渐发展;因此,对鲁棒控制算法的需求日益增长,该算法可以处理不确定性和性能优化。对具有许多自由度的结构进行动力分析是很常见的。尽管可以使用数值方法来计算模态属性,但不能期望现代控制技术对此类系统具有鲁棒性。从这个意义上讲,人们对减小结构模型的尺寸同时保持良好的精度有着极大的兴趣。但是,使用工厂的降序订单模型会在闭环系统中引起溢出效应。这是由于未建模振动模式的可能激发。本文提出了一种为智能结构设计鲁棒控制器的方法,其中考虑了控制力输入极限(PZT执行器)和参数值的可能不确定性。控制器设计公式化为线性矩阵不等式(LMI)。本文以固定-固定铝梁的应用结束。

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