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基于离复位控制策略的结构振动控制研究 被引量:1

STUDY ON VIBRATION CONTROL OF STRUCTURES BASED ON THE OFF-AND-TOWARDS-EQUILIBRIUM CONTROL STRATEGY
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摘要 对于主动或半主动控制系统来说,目前有多种经典控制算法可以应用于结构控制,然而由于结构控制系统内嵌的参数不确定性、非线性行为和时变特征,这些常规算法的适用性和控制效率往往是不理想的。与之相反,模糊控制系统由于不依赖系统的精确数学模型即可有效实施控制,因而许多研究者转向考虑采用模糊控制途径实施结构控制以避免这些问题。模糊控制现阶段的难题在于控制规则的建立仍无系统的方法可循,一般采取半经验的方法。由于缺乏系统完整的分析和设计方法,模糊控制规则的建立通常需要进行反复的尝试或试验,存在一定的困难。针对这一难题,提出并发展了一种离复位控制策略,用以生成结构模糊控制系统的控制规则。以这种策略作为设计模糊控制规则库的依据,研究了一个底层设有主动拉索控制系统的多层结构的地震反应控制问题。在算例中,通过与线性二次型最优控制算法进行控制效果的对比,验证了它的合理性和有效性。 For a semiactive or active control system, although there are many classic algorithms available, their applicability and control efficiency are not ideal due to systematic features of nonlinear behavior, time variable and parameter uncertainties. On the contrary, since fuzzy control systems are mathematical models free, these difficulties can be overcome. Therefore, many researchers have adopted fuzzy logic approach for structural control. This is very useful for structural vibration control. However, fuzzy control theory still lacks a systemic design guidance to set up the corresponding rule-bases at present, and accordingly the rule-bases need often be revised repeatedly. In order to solve this problem, a new idea for structural control, i.e. the off-and-towards-equilibrium (OTE) control strategy, is presented and developed in this paper. For a fuzzy control system, a set of rules can be extracted easily on the basis of the idea. In this paper, numerical simulations are carried out to study the seismic response control of a multi-storey structure with an active tendon system(ATS)installed in the first storey, and the rule-bases of the corresponding fuzzy control system according to the OTE control strategy are established. Simulating results verify its rationality and validity by comparing the earthquake responses of the structure using the OTE strategy during the earthquakes to those using the LQR algorithm.
出处 《工程力学》 EI CSCD 北大核心 2006年第5期1-8,共8页 Engineering Mechanics
基金 国家自然科学基金(50508003 50478042)
关键词 振动控制 控制策略 离复位控制策略 模糊控制 规则库设计 主动拉索系统 Vibration control control strategy the OTE control strategy fuzzy control design of rule-bases ATS
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