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首页> 外文会议>Conference on Active and passive smart structures and integrated systems; 20090309-12; San Diego, CA(US) >Low energy multimodal semi-active control minimizing the number of transducers
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Low energy multimodal semi-active control minimizing the number of transducers

机译：低能耗多模式半主动控制，最大限度地减少了传感器数量

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摘要

The new proposed method is the hybridization between SSDI techniques and active methods developed for modal active control such as time sharing control and modal observer in order to control several modes of a structure with a good performance but without operative energy. It is designed in order to minimize the number of control components. The principal application field is the transportation. It is based on several modal SSDI controllers which act on the same actuator voltage. They are synchronized on each extremum of the corresponding modal displacement. Modal displacements are reconstructed thanks to a modal model of the smart structure from a modal observer. In order to reduce the number of actuators, the time sharing method is adapted to SSDI techniques: all the modal SSDI are connected to the same piezoelectric actuator, but only one controller is selected to control the voltage inversion for each step time. In order to select modal SSDI controller having the most effective action for damping, a computation of modal energies is realized from the estimated modal state. A controller selector is used to connect the modal SSDI command, whose corresponding mode has the highest modal energy [6], to the switch trigger. An application on a smart clamped free beam including one actuator and two sensors is presented. Three modes are controlled and the modal responses are observed on five modes. The results show that the control reduces significantly the vibration of targeted modes. Moreover, the method is not subject to stability problems.
机译：新提出的方法是将SSDI技术与为模态主动控制（例如分时控制和模态观察器）开发的主动方法之间的混合，以控制具有良好性能但没有操作能量的结构的几种模式。其设计目的是最大程度地减少控制组件的数量。主要应用领域是运输。它基于几个作用于相同执行器电压的模态SSDI控制器。它们在相应模态位移的每个极值上都同步。借助模态观测器的智能结构模态模型，可以重建模态位移。为了减少执行器的数量，分时方法适用于SSDI技术：所有模态SSDI均连接到同一压电执行器，但是对于每个步进时间，仅选择一个控制器来控制电压反转。为了选择对阻尼具有最有效作用的模态SSDI控制器，从估计的模态实现模态能量的计算。控制器选择器用于将模态SSDI命令（其对应的模式具有最高模态能量[6]）连接到开关触发器。提出了一种在包括一个执行器和两个传感器的智能夹紧自由梁上的应用。控制了三种模式，并在五种模式下观察了模态响应。结果表明，该控制显着降低了目标模式的振动。而且，该方法不存在稳定性问题。

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