压电材料传感器在悬臂梁振动控制系统中的应用试验研究
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摘要
压电材料作为结构振动控制中的敏感元件,其在智能结构中的应用是一个重要的研究方向。在使用压电材料作为传感器和作动器的条件下,本研究采用了两种控制算法对悬臂梁进行振动控制试验研究。结合根轨迹结合分析,快速确定结构的控制增益,得到了系统稳定的良好结果。同时,利用模态控制方法进行处理,有效地控制了结构响应。试验结果表明,两种控制方法均可增加系统阻尼,减小系统稳定时间,效果较好。
Application of PZT material in structure active control system is an important research direction in smart structure.Experiments are carried out to attenuate the vibration of the cantilever beam with PZT actuators and sensors.Two control methods are adopted in the experiments.Root locus method is included in SRF control strategy to determine the control gain and assure the stability of the system.At the meantime,modal control method is implemented with LQG control method.The results show good control effects both in the increase of the damping ratio and decrease of the setting time.
Application of PZT material in structure active control system is an important research direction in smart structure.Experiments are carried out to attenuate the vibration of the cantilever beam with PZT actuators and sensors.Two control methods are adopted in the experiments.Root locus method is included in SRF control strategy to determine the control gain and assure the stability of the system.At the meantime,modal control method is implemented with LQG control method.The results show good control effects both in the increase of the damping ratio and decrease of the setting time.
引文
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[2]宁响亮,谭平,叶茂,等.基于自适应模糊控制算法的公路桥梁MR半主动控制[J].振动与冲击,2009,28(1):32-35 NING X.L.,TAN P.,YE M.et al.Semi-active control with MR damper for highway bridge based on adaptive fuzzy control algerithm [J].Journal of Vibration and Shock,2009,28(1):32 - 35
[3]刘嘉,瞿伟廉,涂建维.模型降阶对桥梁主动控制的稳定性及误差分析[J].武汉理工大学学报,2010,32(7):139-142 LIU J.,Qu W.L.,TU J.W..Analysis of Stability and Error of Active Control for Longitudinal Vibration Response of Bridge Adopted Model Reduction[J].Jonrnal of Wuhan University of Technology,2010,32 (7):139-142
[4]汪志昊,陈政清.隔震桥梁地震反应的最优主动控制力特性研究[J].振动工程学报,2011,24(2):175-180 WANG Z.H.,CHEN Z.Q..Characteristics of optimal control force for seismically excited isolated bridges[J].Journal of Vibration Engineering, 2011,24(2):175 - 180
[5]Newman,S.M.,Active damping control of a flexible space structure suing piezoelectric sensors and actuators[D],Master thesis,US naval postgraduate school,1992
[6]Adam Czomik.On discrete-time linear quadratic control[J].Systems and Control Letters,1999,36(2):101 - 107
[7]Rao,S.S.Vibration of continuous system,John Wiley & Sons,2007
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