Adaptive Modified Positive Position Feedback for Active Vibration Control of Structures
Adaptive Modified Positive Position Feedback for Active Vibration Control of Structures
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DOI：
10.1177/1045389x10361631
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发表时间：
2010-02
影响因子：
2.7
通讯作者：
S. Nima Mahmoodi;M. Ahmadian;D. Inman
中科院分区：
文献类型：
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作者：
S. Nima Mahmoodi;M. Ahmadian;D. Inman
提出了一种基于自适应控制器的改进型正位置反馈(MPPF)控制器，该控制器是一种利用压电作动器和传感器组合的振动主动控制方法。该自适应机制主要由两部分组成：(1)频率自适应和(2)自适应控制器。频率自适应只使用快速傅立叶变换跟踪振动的频率。然后将获得的频率馈送到MPPF补偿器和自适应控制器。这为MPPF提供了一个独特的功能，将其功能范围从控制音调振动扩展到宽带干扰。自适应控制器机构由一个与MPPF系统同阶的参考模型及其补偿器组成。自适应律提供了控制宽带振动引起的频率变化所需的额外控制力。实验结果表明，该频率自适应方法取得了较好的效果。结果还表明，在整个实验过程中，MPPF可以对悬臂梁提供显著的减振效果。
The modified positive position feedback (MPPF) controller, an active vibration control method that uses collocated piezoelectric actuator actuators and sensors, is developed using an adaptive controller. The adaptive mechanism consists of two main parts: (1) frequency adaptation and (2) adaptive controller. Frequency adaptation only tracks the frequency of vibrations using fast Fourier transforms. The obtained frequency is then fed to MPPF compensators and the adaptive controller. This provides a unique feature for MPPF by extending its domain of capabilities from controlling tonal vibrations to broadband disturbances. The adaptive controller mechanism consists of a reference model that is of the same order as the MPPF system and its compensators. The adaptive law provides the additional control force that is needed for controlling frequency changes caused by broadband vibrations. The experimental results show that the frequency adaptation method that is derived has worked quite well. The results also indicate that the MPPF can provide significant vibration reduction on a cantilever beam that is used throughout the experiments.