摘要
为降低动力荷载条件下张拉整体结构的振动响应,提升结构体系的主动控制效果,提出了一种适用于张拉整体结构的动态滑模控制方法。根据结构体系的动力学模型,推导出受控系统的状态空间表达,进而设计了基于趋近律的动态滑模控制器,并运用模糊规则对控制器参数进行自适应调节。采用一种基于作动器同等能量输入的对比分析方案,结合控制性能评价指标,探讨了作动器的控制效能问题,并以此评估不同控制方法对体系的控制效果。以某一跨度为5 m的空间张拉整体梁为例,对其开展了水平地震作用下的数值仿真,结果表明,动态滑模控制方法提升了作动器的控制效能,对降低结构的动态响应是切实有效的,且比常规的二次线性最优控制方法具备更加优异的控制效果,为此类结构的主动振动控制研究提供了新的策略选择。
To mitigate the vibration response and improve the active control efficiency of tensegrities under dynamic loadings,a dynamic sliding mode control method,suitable for tensegrity structures,was proposed.The state space expression of the controlled system was derived via the establishing of structural dynamic model,and a dynamic sliding mode controller was designed on the basis of the reaching law,meanwhile,the fuzzy rule was utilized to adaptively adjust the controller parameters.A comparative analysis scheme,concerning the identical energy input of actuators,was adopted with the combined use of a control performance evaluation indicator to explore the control effectiveness of actuators and evaluate the control efficiency of different control algorithms for the system.A spatial tensegrity beam with a span of 5 m was herein taken as an example,the numerical simulation was conducted on it under horizontal seismic excitation.The results imply that the dynamic sliding mode control method improves the control efficiency of actuators and is effective in reducing the structural dynamic responses.Moreover,the proposed approach is proved to have better control effects than the traditional quadratic linear optimal control method,providing a new strategic choice for the active control of such structures.
作者
冯晓东
王晓煜
郑亦汶
吕辉
高双
FENG Xiaodong;WANG Xiaoyu;ZHENG Yiwen;L Hui;GAO Shuang(School of Civil Engineering,Shaoxing University,Shaoxing 312000 China;College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China;School of Civil Engineering and Architecture,Nanchang Hangkong University,Nanchang 330063 China;School of Mechanical and Electrical,Shaoxing University,Shaoxing 312000,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2024年第14期293-300,共8页
Journal of Vibration and Shock
基金
国家自然科学基金(51908356)
国家留学基金委项目(202008330250)。
关键词
张拉整体结构
动态滑模控制
模糊规则
振动控制
控制效能
tensegrity structure
dynamic sliding mode control
fuzzy rule
vibration control
control efficiency
作者简介
第一作者:冯晓东,男,博士,副教授,1987年生;通信作者:郑亦汶,女,博士生,1989年生。
