| 李冬伟,白鸿柏*,何忠波,张磊.压电促动器存在故障时柔性板的μ综合振动主动控制研究[J].实验力学,2010,25(1):30~40 |
| 压电促动器存在故障时柔性板的μ综合振动主动控制研究 |
| Active Vibration Control of the Flexible Plate with Variable Driving Force of Piezoelectric Actuator via μ-Synthesis |
| 投稿时间：2009-02-07 修订日期：2009-08-31 |
| DOI： |
| 中文关键词: 柔性结构 振动主动控制 促动器故障 鲁棒控制 μ综合 |
| 英文关键词:flexible structure active vibration control actuator fault robust control μ-synthesis |
| 基金项目:本文得到教育部“跨世纪优秀人才计划”基金项目资助 |
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| 中文摘要: |
| 利用柔性板的实验模型研究了一种考虑作动器驱动力故障的鲁棒控制器。首先识别出粘贴压电促动器的柔性板振动控制系统实验模型，基于此利用改变压电片对联接数量来模拟促动器驱动故障，并设计了将驱动力变化提取成正则不确定块对角阵的方法，同时将剩余模态表示成高通滤波器，再通过引入虚拟不确定，构建了考虑外扰抑制和控制增益约束的综合控制器。数值仿真验证了闭环系统理论上的鲁棒稳定性。实测试验结果显示，与一般的μ控制器相比，当闭环过程中出现压电促动器驱动故障时，初始外扰下，控制结束时振幅峰峰值降低了3V，持续随机外扰下，降噪量提高了近3dB。数值仿真验证了闭环系统理论上的鲁棒稳定性。实测试验结果显示，与一般的μ控制器相比，当闭环过程中出现压电促动器驱动故障时，初始外扰下，控制结束时振幅峰峰值降低了3V，持续随机外扰下，降噪量提高近了3dB。 |
| 英文摘要: |
| A new kind of μ-synthesis controller design method was researched based on the flexible plate test model with actuators’ driving force fault. Firstly, the state space model of flexible plate vibration system with several malfunction connections was identified by the multivariable identification theory. Based on the identified results, the canonical uncertain block diagonal matrix extraction method of driving force variation was designed by the means of singular value decomposition of the test model input matrix and linear fraction transformation, at the same time the residual modal was expressed by the low band filter, then considered the disturbance suppression and control gain constraint performance of the close-loop system, the virtual uncertainty was introduced to establish the μ-synthesis solution procedure. The simulation proved that the theoretical robust stabilization. The test results showed, compared to the μ-synthesis control without considering the driving uncertainty, the initial perturbation attenuation amplitude was decreased 3V, the random disturbance noise reduction was increased 3 dB. |
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