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Experimental studies on active control of a dynamic system via a time-delayed absorber

ISSN号：0567-7718
期刊名称：《力学学报：英文版》
时间：0
分类：TP273[自动化与计算机技术—控制科学与工程;自动化与计算机技术—检测技术与自动化装置] X701.3[环境科学与工程—环境工程]
作者机构：[1]School of Aerospace Engineering and Applied Mechanics,Tongji University, Shanghai 200092, China
相关基金：supported by the State Key Program of National Natural Science Foundation of China（grant No. 11032009）; National Natural Science Foundation of China（grant No.11272236）

关键词：控制实验, 时间延迟, 吸收剂, 主系统, 有源, 控制参数, 加速度反馈, 信号采集, Vibration absorber Time-delayed feedback Vibration control Stability

中文摘要：

传统的被动吸收器在一个狭窄、肯定的频率乐队以内是充分有效的。解决这个问题，推迟时间的加速反馈被介绍把一个被动吸收器变换成活跃的。两固有并且故意的时间延期被包括。前者主要来自信号获得并且处理，计算，并且适用使活动力量，和它的值被修理。后者在控制器被介绍，并且它的价值是活跃地可调节的。第一，机械模型被建立，频率反应方程被获得。稳定性的区域在控制参数的飞机被描出。第二，控制帕拉的设计计划 -- 米被执行帮助选择反馈获得和时间延期的值。第三，试验性的研究被进行。否定、积极的反馈控制的效果被调查。试验性的结果证明控制参数的合适的选择可以拓宽颤动吸收的有效频率乐队。而且，当被动吸收器完全失败时，推迟时间的吸收器极大地压制主要系统的反响的反应。试验性的结果在对理论预言和数字模拟的好同意。

英文摘要：

The traditional passive absorber is fully effective within a narrow and certain frequency band.To solve this problem,a time-delayed acceleration feedback is introduced to convert a passive absorber into an active one.Both the inherent and the intentional time delays are included.The former mainly comes from signal acquiring and processing,computing,and applying the actuation force,and its value is fixed.The latter is introduced in the controller,and its value is actively adjustable.Firstly,the mechanical model is established and the frequency response equations are obtained.The regions of stability are delineated in the plane of control parameters.Secondly,the design scheme of control parameters is performed to help select the values of the feedback gain and time delay.Thirdly,the experimental studies are conducted.Effects of both negative and positive feedback control are investigated.Experimental results show that the proper choices of control parameters may broaden the effective frequency band of vibration absorption.Moreover,the time-delayed absorber greatly suppresses the resonant response of the primary system when the passive absorber totally fails.The experimental results are in good agreement with the theoretical predictions and numerical simulations.