基于变论域模糊控制的时变结构震动控制方法研究  

Vibration control of time-varying structures based on variable universe fuzzy control

作　　者：梅品彬 李芳芳 吕杨[1] MEI Pinbin;LI Fangfang;L Yang(Tianjin Key Laboratory of Civil Structure Protection and Reinforcement,Tianjin Chengjian University,Tianjin 300384,China)

机构地区：[1]天津城建大学天津市土木建筑结构防护与加固重点实验室,天津300384

出　　处：《振动与冲击》2023年第18期155-163,共9页Journal of Vibration and Shock

基　　金：国家自然科学基金(52178295);天津市研究生科研创新项目(2021YJSS343)。

摘　　要：针对传统工程震动控制领域控制对象均为确定结构,未考虑实际结构在地震的过程中及地震前可能会发生的刚度退化、质量降低问题,该文章以时变三层框架结构作为被控对象,在传统模糊控制算法的基础上引入变论域法,建立了基于变论域模糊控制的时变结构震动控制方法。通过在传统主模糊控制器增设伸缩因子模糊控制器,将被控对象的误差及误差变化率作为输入,伸缩因子作为输出,根据被控对象的误差及误差变化率自适应调整主模糊控制器的模糊论域。SIMULINK软件仿真结果表明,所提出的控制方法能实现模糊控制论域自适应调整,针对时变结构位移、速度、加速度的控制效果均优于传统模糊控制和ON-OFF控制算法,具有一定工程应用前景。Most of existing control strategies are efficient to constant structures,which do not consider the stiffness and mass degradation before or during an earthquake.In the paper,a time-varying three-story frame structure was taken as the controlled object,the variable universe method was introduced on the basis of the traditional fuzzy control algorithm,and a time-varying structure vibration control method was proposed based on the variable universe fuzzy control.By adding a scaling factor fuzzy controller to the traditional fuzzy controller,taking the error and error change rate of the controlled object as the input and the scaling factor as the output,the fuzzy universe of the fuzzy controller was then adaptively adjusted according to the error and error change rate of the controlled object.The SIMULINK simulation results show that the proposed control method can realize adaptive adjustment of fuzzy control universe,and the control effect on the displacement,velocity and acceleration of time-varying structures is superior to that of the traditional fuzzy control and ON-OFF control algorithm.The method can be used in practice.

关 键 词：时变结构 刚度退化 半主动控制 变论域模糊控制 

分 类 号：TU311.3[建筑科学—结构工程] TP273.4[自动化与计算机技术—检测技术与自动化装置]