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SISO Piezo Based Circuit Development for Active Structural Vibration Control

机译:基于Siso压电的电路开发,用于主动结构振动控制

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This paper deals with the issue of developing a smart vibration control platform following an innovative model-based approach. As a matter of fact, obtaining accurate information on system response in pre-design and design phases may reduce both computational and experimental efforts. From this perspective, a multi-degree-of-freedom (MDOF) electro-mechanical coupled system has been numerically schematized implementing a finite element formulation: a robust simulation tool integrating finite element model (FEM) features with Simulink? capabilities has been developed. Piezo strain actuation has been modelled with a 2D finite element description: the effects exerted on the structure (converse effect) have been applied as lumped loads at the piezo nodes interface. The sensing (direct effect) has instead been modelled with a 2D piezoelectric constitutive equation and experimentally validated as well. The theoretical study led to the practical development of an integrated circuit which allowed for assessing the vibration control performance. The analysis of critical parameters, description of integrated numerical models, and a discussion of experimental results are addressed step by step to get a global overview of the engineering process. The single mode control has been experimentally validated for a simple benchmark like an aluminum cantilevered beam. The piezo sensor-actuator collocated couple has been placed according to an optimization process based on the maximum stored electrical energy. Finally, a good level of correlation has been observed between the forecasting model and the experimental application: the frequency analysis allowed for characterizing the piezo couple behavior even far from the resonance peak.
机译:本文涉及在创新基于模型的方法之后开发智能振动控制平台的问题。事实上,在预设计和设计阶段获得有关系统响应的准确信息,可以减少计算和实验努力。从这种角度来看,多程度自由度(MDOF)电力机械耦合系统已经在数模上示意性地实现了有限元制定:集成了有限元模型(FEM)功能的鲁棒仿真工具,具有Simulink?功能已经开发出来。压电应变驱动已经用2D有限元描述模型:在压电节点接口处被应用于结构(逆转效果)上施加的效果。相反,感测(直接效应)已经用2D压电本构方程式建模并实验验证。理论研究导致了集成电路的实际开发,允许评估振动控制性能。分析关键参数,集成数值模型的描述,以及对实验结果的讨论,逐步解决了实现工程过程的全球概述。单模控制已经通过实验验证,用于像铝悬臂梁一样的简单基准。压电传感器致动器并置耦合根据基于最大存储的电能的优化过程放置。最后,在预测模型和实验应用之间观察到了良好的相关性:允许甚至远离共振峰的压电耦合行为所允许的频率分析。

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