Active vibration control using piezoelectric actuators employing practical components
Active vibration control using piezoelectric actuators employing practical components
复制标题
DOI：
10.1177/1077546319870933
复制
发表时间：
2019-08-25
影响因子：
2.8
通讯作者：
Yang, C.
中科院分区：
文献类型：
--
作者：
Williams, D.;Khodaparast, H. Haddad;Yang, C.
不必要的振动是结构和系统中的常见现象，并经常对其完整性或功能构成威胁。这项研究的目的是寻求一种解决方案，以减少使用以压电片为致动器的主动振动控制系统中的一个环节内的振动，同时避免使用与保持系统质量尽可能最小的共同目标相冲突的大型和昂贵的设备。以前的研究使用了大型昂贵的设备作为控制器，传感器往往只能测量结构沿一个轴的振动；本研究旨在解决这些问题。选择将体积小、重量轻、成本低的Raspberry PI 3与小巧、可安装的传感器和执行器相结合，是基于控制器、传感器和执行器表现出的更大的实用性，从而使它们可以在各种应用中使用。基于Euler-Bernoulli梁理论建立了该结构的分析模型，并通过有限元模型和试验数据得到的模态参数和频率响应进行了验证。然后设计了控制器，并将其应用于分析模型以减小连杆的振动，然后在Raspberry PI 3中实现了同样的设计，并进行了实验研究。在实验和分析研究中探索了控制器中有目的的时延的引入和有效性，目的是为了抵消控制系统产生的不利结果。实验结果证明了控制设计在包括杆件第一固有频率的频率范围内是有效的，并验证了包含控制设计的分析模型。
Unwanted vibrations are a common occurrence within structures and systems, and often pose a threat to their integrity or functionality. This research aims to seek a solution to attenuate the vibrations experienced within a link of a system using active vibration control with piezoelectric patches as actuators, whilst avoiding the use of large and expensive equipment which would contravene with the common objective of maintaining the smallest mass possible of the system. Previous research has employed large and expensive equipment as the controller, with sensors often only being able to measure the vibrations of the structure along one axis; this research aims to address these issues. The choice of utilizing the small, lightweight, and low-cost Raspberry Pi 3 combined with petite, mountable sensors and actuators was made based upon the greater practicality that the controller, sensors, and actuators exhibit, allowing for their use in a wide variety of applications. An analytical model of the structure was created based on Euler-Bernoulli beam theory and validated through the modal parameters and the frequency response obtained from a finite element model and experimental data. A controller was then designed and applied to the analytical model to attenuate the vibrations along the link, and then the same design was implemented within the Raspberry Pi 3, and experimental studies were carried out. The introduction and effectiveness of a purposeful time delay within the controller was explored within the experimental and analytical studies, with the intention of counteracting unfavorable results produced by the control system. The results of the experiment proved the control design to be effective for a range of frequencies that included the first natural frequency of the link, and validated the analytical model including the control design.