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摘要在航空航天技术领域，基于智能材料的空间柔性结构主动振动控制已经成为一个热门的课题，受到广泛关注。而压电陶瓷作为一种常见的智能材料具有质量轻、频率范围宽、功耗低、易于加工适用于柔性结构、具有比较好的线性关系等优点，因此在空间柔性结构的主动振动控制研究中占据很重要的位置。22761
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本文以一套表面贴有压电陶瓷作传感器和致动器的柔性臂系统为研究对象，并对柔性臂的主动振动控制展开研究。在对系统的硬件组成进行分析的基础上，采用有限元法建立了系统的模型，并对系统模型进行降阶处理。针对柔性臂主动振动控制问题，研究了二次型Guass最优控制算法和模糊自整定PID控制算法，设计了相应的主动控制器，Matlab仿真验证了各种控制算法对柔性臂振动的控制效果。仿真结果表明，两种控制策略对柔性臂的振动都具有良好的控制效果。
采用VB编写柔性臂系统振动控制的实验软件，该软件具有操作界面简洁、操作简单、功能强等特点。利用该软件，实现了对柔性臂振动模态进行控制的算法，并完成了大量的实验。实验结果表明，采用正位置反馈控制算法可以有效抑制柔性臂的振动。
关键词 压电陶瓷 柔性臂 主动振动控制 有限元法 正位置反馈
毕业设计说明书（毕业论文）外文摘要
Title Research on active vibration control of flexible beam with piezoelectric ceramics
Abstract
In the field of aerospace technology, active vibration control of spatial flexible structure has become a hot topic and attracted widespread attention. Piezoelectric ceramic is particularly suitable for active vibration control of flexible structure because of its advantages such as light weight, wide frequency range, low power consumption, easy processing, as well as good linearity. Therefore, it has played an important role in the spatial flexible structure.
In this thesis, the research object include a piezoelectric ceramic sensor, a piezoelectric ceramic actuator which is alternately affixed and attached on a flexible beam, and the active vibration control of flexible beam is studied. Based on the analysis of the hardware of the system, the finite element method is applied to establish the model of the system. After analyzing the characteristics of the system model, two kinds of active controller are designed by means of quadratic Guass optimal control and fuzzy adaptive PID control, and their control effects to suppressing vibration of flexible beam have been verified in Matlab environment. Simulation results show that the two control strategies on the vibration of the flexible beam has good control performance.
Experimental control software for the flexible beam has been programmed via Visual Basic, which is not only powerful but also practical. With this control software, lots of experiments with the flexible beam were carried out to test and improve the effect of the vibration control. As for the positive position feedback controller designed for the flexible beam system, experimental results verify the effectiveness of the vibration control.
Keywords Piezoelectric ceramics Flexible beam Active vibration control Finite element method Positive position feedback
目 次
1 引言 1
1.1 智能结构 1
1.1.1 智能结构的特点 1
1.1.2 智能结构的应用 2
1.2 压电陶瓷传感器和致动器及其布置 2
1.3 振动控制方法 4
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