基于智能结构技术的动叶尖间隙控制实验研究

Y. Lin, C. Wen, B. Choi, D. Saravanos
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引用次数: 0

摘要

本文介绍了采用智能结构技术对柔性悬臂梁进行简单有效的振动控制方案的实验研究。我们的目标是开发一种物理上可实现的方法,利用压电陶瓷传感器和执行器主动控制涡轮转子叶片顶部的振动。为了在我们的分析中包含转子叶片的柔性特性,我们使用柔性悬臂梁来模拟由磁激振器产生的外部扰动引起的涡轮叶片的动态行为。激振器安装在柔性梁的自由端附近,以最大限度地提高外部激励。采用压电陶瓷传感器和执行器,并将其均匀分布为智能结构的组成部分。采用分析和实验相结合的方法,确定了包括压电陶瓷传感器和执行器在内的智能结构的数学模型。在建立实验动力学模型的基础上,采用比例增益反馈控制器补偿底层结构的振动挠度。研究结果表明,所提出的控制方法与智能结构相结合,可以抑制80%以上的实测结构振动,效果令人满意。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Experimental Study of Rotor Blade Tip Clearance Control Utilizing Smart Structure Technology
In this paper the experimental development of a simple and effective vibration control scheme for a flexible cantilever beam employing smart structure technology is presented. Our goal is to develop a physically realizable means to actively control turbine rotor blade tip vibration with piezoceramic sensors and actuators. To include the flexible characteristics of rotor blades in our analysis, a flexible cantilever beam is used to simulate the dynamic behavior of the turbine blades due to external disturbances, generated by a magnetic shaker. The shaker was installed near the free end of the flexible beam to maximize the external excitations. Piezoceramic sensor and actuator were used and evenly distributed as elements of the smart structure. The mathematical model of the smart structure including the piezoceramic sensors and actuators was determined by combining both analytical and experimental schemes. Based on the derived experimental dynamic model, a proportional gain feedback controller was implemented to compensate for the vibratory deflections of the underlying structure. The results of the work show that the proposed control methodology along with the smart structure can suppress more than 80% of the measured structural vibration, which is considered satisfactory.
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