基于混合逻辑动态模型的拉索振动控制分析

发布时间：2018-01-18 07:17

本文关键词：基于混合逻辑动态模型的拉索振动控制分析　出处：《重庆交通大学》2014年硕士论文　论文类型：学位论文

【摘要】：桥梁中的斜拉索结构由于自身具有质量小、阻尼低、柔性大的特点，在各种激励下，极易发生大幅振动。这种振动会对桥梁的施工、正常使用和运营带来较大安全隐患，因此对斜拉索振动形式及振动机理的研究变得非常重要。本文考察了被动粘滞型、主动型和半主动型等三种阻尼器，重点是半主动控制阻尼器，它可以提供任何所需要的耗散力达到减振的效果。要评价半主动阻尼器控制技术，则有必要将半主动控制阻尼器与被动线性粘滞型阻尼器的减振效果进行比较。同时，主动控制代表着控制系统所能达到的最优性能，，所以，也将半主动阻尼器与主动控制阻尼器进行了比较。在对拉索阻尼器三种控制方法分析的基础上，通过引入辅助变量，分别建立了拉索阻尼器系统被动控制、主动控制和半主动控制的混合逻辑动态模型。仿真结果表明，该模型可以很好地反映拉索系统振动过程的动态特性，在数值上MLD模型与状态空间模型几乎达到一致，证明了MLD模型的有效性。而MLD模型的优越性表现在：①使用HYSEDL语言后，在系统的建模方面更加的标准化、模块化，有利于大型系统的开发。②在数值模拟运算时间上，MLD模型耗时短，提高了大型复杂的系统的运算效率。在此研究基础上，将混杂系统的MLD模型的建模方法应用到了依托工程琼州海峡大桥典型斜拉索的风振控制上。首次推导了桥梁拉索结构的混杂系统控制理论，提出了基于混合逻辑动态（MLD）模型、半主动控制元件和非状态依赖逻辑事件（人工智能）的拉索结构振动混杂控制技术的关键算法。该理论和关键算法为具有非状态依赖离散事件（人工智能）的结构复杂非线性振动控制提供了统一的数学方法，对提高土木工程结构的系统控制能力、水平和安全性具有重要意义，对于土木工程在高层次上与电力、汽车、工业自动化等行业安全控制领域的跨学科融合具有重大的应用价值。
[Abstract]:Because of its small mass, low damping and large flexibility, the cable-stayed structure in the bridge is easy to occur large vibration under various excitations. This kind of vibration will be used in the construction of the bridge. Normal use and operation bring great hidden trouble to safety, so it is very important to study the vibration form and vibration mechanism of stay cable. In this paper, three kinds of dampers, passive viscous, active and semi-active, are investigated, with emphasis on semi-active control dampers. It can provide any needed dissipation force to achieve the effect of vibration absorption. The semi-active damper control technology should be evaluated. It is necessary to compare the effect of semi-active control damper and passive linear viscous damper. At the same time, active control represents the optimal performance of the control system, so. The semi-active damper and the active control damper are also compared. Based on the analysis of three control methods of cable damper, the passive control of cable damper system is established by introducing auxiliary variables. Hybrid logic dynamic model of active control and semi-active control. The simulation results show that the model can well reflect the dynamic characteristics of cable system vibration process. Numerically, the MLD model is almost consistent with the state space model, which proves the validity of the MLD model, while the superiority of the MLD model is shown by the use of HYSEDL language in the case of the MLD model. The modeling of the system is more standardized and modularized, which is beneficial to the development of large scale system. 2. In numerical simulation, MLD model takes less time and improves the computational efficiency of large and complex system. Based on this research, the modeling method of MLD model of hybrid system is applied to wind vibration control of typical stayed cables of Qiongzhou Strait Bridge. The hybrid system control theory of bridge cable structure is derived for the first time, and a hybrid logic dynamic MLD-based model is proposed. Key algorithms for hybrid vibration control of cable structures with semi-active control elements and non-state dependent logical events (AI). The theory and key algorithms are discrete events with non-state dependence (AI). A unified mathematical method for complex nonlinear vibration control is provided. It is of great significance to improve the system control ability, level and safety of civil engineering structure, for civil engineering in high level with electric power, automobile. The cross-disciplinary integration of industrial automation and other fields of safety control has great application value.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U448.27;U441.3

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