考虑结构高阶振型信息的AMD低维控制器设计

发布时间：2018-03-06 09:28

本文选题：振动控制　切入点：AMD　出处：《振动工程学报》2016年06期 　论文类型：期刊论文

【摘要】：为减小AMD控制系统的时滞影响,一般需对被控结构模型作减维处理,但是在减维过程中系统较小特征值对应相关的结构信息被直接舍弃,将使得低维结构缺少原结构高阶振型等信息,导致低维模型精度降低,影响控制器的设计准确性。在基于均衡截断法和极点配置算法的低维控制器设计中,重新考虑舍弃的结构高阶信息,该信息包括原结构的高阶自振频率、高阶阻尼比以及高阶振型模态信息等,并在进行极点配置之前,先考虑该部分信息对系统极点位置的影响,在控制系统的设计阶段消除了低维模型精度低的不利影响。以10层结构为例,基于改进的低维控制器,以系统控制效果、AMD控制力及行程峰值为指标,分析了低维模型对AMD控制系统性能的影响;并以4层框架实验模型的AMD控制系统为实例,验证上述数值分析结论的正确性。
[Abstract]:In order to reduce the time-delay effect of AMD control system, it is generally necessary to reduce the dimension of the controlled structure model, but in the process of dimensionality reduction, the structure information corresponding to the smaller eigenvalues of the system is discarded directly. It will make the low-dimensional structure lack of information such as high-order mode of the original structure, which leads to the reduction of the precision of the low-dimensional model and affects the design accuracy of the controller. In the design of the low-dimensional controller based on the equalization truncation method and pole assignment algorithm, Reconsidering the higher-order information of the abandoned structure, including the high-order natural frequency, the high-order damping ratio and the high-order modal information of the original structure, and considering the influence of the information on the pole position of the system before the pole assignment is carried out. In the design phase of the control system, the negative influence of low precision of the low-dimensional model is eliminated. Taking the 10-layer structure as an example, based on the improved low-dimensional controller, the control effect of the system is considered as the peak value of AMD control force and stroke. The influence of the low-dimensional model on the performance of AMD control system is analyzed, and the correctness of the above numerical analysis results is verified by taking the AMD control system of the four-layer frame experimental model as an example.
【作者单位】：哈尔滨工业大学深圳研究生院;福建工程学院土木工程学院;中国建筑第四工程局有限公司华南公司;
【基金】：国家重点研发计划重点专项(2016YFC0701102) 国家自然科学基金重点项目(51538003);国家自然科学基金重大国际(中美)合作研究项目(51261120374);国家自然科学基金面上项目(51378007) 福建省自然科学基金资助项目(2014J01171) 深圳市科技计划技术攻关项目(JSGG20150330103937411)
【分类号】：TU311.3

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