基于智能压电摩擦阻尼器的Benchmark模型风振响应半主动控制

Semi-active Control of Wind-induced Vibration Response of Benchmark Model Based on Smart Piezoelectric Friction Damper

在改进的Pall摩擦耗能器的基础上设计了一种智能压电摩擦阻尼器,并分析了其阻尼力模型。利用设计出的智能摩擦阻尼器,采用基于经典线性最优控制理论的半主动控制策略对Benchm ark模型的风振响应控制进行了研究。结果表明:智能压电摩擦阻尼器对标准风振控制模型的半主动控制效果较为明显,相对于无控结构来说能有效降低结构的风振响应。此外,本文对基于限界Hrovat最优控制算法的半主动控制系统的参数优化进行了分析,说明了该半主动控制系统对Benchm ark模型阻尼的不确定性具有很好的鲁棒性,而对刚度的不确定性则表现出一定的敏感性。

A smart piezoelectric friction damper is designed based on a kind of improved Pall friction dampers and its damping force model is analyzed. Using designed smart friction damper, the wind-induced vibration control of Benchmark Model according to the semi-active control strategies based on the classical linear optimal control theory is studied. The results of simulation analysis show that the effect of the semi-active control of the standard wind-control model based on piezoelectric friction damper is evident. Compared to that of uncon- trolled structures, the wind-induced vibration response of the controlled structures is effectively reduced. In addition, the analysis of parameter optimization of the semi-active control system based on the limit Hrovat op- timal control algorithm is carried out. Analysis shows that the robustness of the semi-active control system to the stiffness uncertainty of Benchmark Model is very good, but the robustness to the damping uncertainty is not so good.