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首页> 外文会议>Twelfth International Conference on Adaptive Structures and Technologies, Oct 15-17, 2001, University of Maryland >AN ADAPTABLE ACTIVE-PASSIVE PIEZOELECTRIC ABSORBER FOR NONSTATIONARY DISTURBANCE REJECTION ― THEORY AND IMPLEMENTATION
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AN ADAPTABLE ACTIVE-PASSIVE PIEZOELECTRIC ABSORBER FOR NONSTATIONARY DISTURBANCE REJECTION ― THEORY AND IMPLEMENTATION

机译：一种自适应的无源扰动主动-被动压电阻尼器-理论与实现

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摘要

It is well known that piezoelectric materials can be used as passive electromechanical vibration absorbers by shunting them with electrical networks. To suppress harmonic excitations with varying frequency, semi-active piezoelectric absorbers have been proposed in the past. However, these semi-active devices have limitations that restrict their applications. The authors have developed a high performance active-passive alternative to the semi-active absorber that uses a combination of a passive electrical circuit and active control actions. The active control consists of three parts: an adaptive inductor tuning action, a negative resistance action, and a coupling enhancement action. In this study, the performance of the new absorber design is experimentally verified. The new test stand consists of a piezoelectric stack integrated into an active-passive isolation mount. The difficulty of obtaining an accurate system model is addressed by proposing an experimental tuning procedure. Using this method, it is demonstrated that the active-passive absorber can provide effective isolation of harmonic excitations with varying frequency.
机译：众所周知，压电材料可以通过与电网并联来用作无源机电减振器。为了抑制频率变化的谐波激励，过去已经提出了半有源压电吸收器。但是，这些半主动设备具有限制其应用的限制。作者已经开发出一种高性能的主动-被动替代品，该替代品使用了无源电路和主动控制功能的组合。主动控制包括三个部分：自适应电感器调整动作，负电阻动作和耦合增强动作。在这项研究中，新型吸收器设计的性能已通过实验验证。新的测试台由集成到主动-被动隔离安装座中的压电叠层组成。通过提出实验性的调整过程可以解决获得准确的系统模型的困难。使用这种方法，证明了有源-无源吸收器可以有效隔离频率变化的谐波激励。

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