压电摩擦阻尼器的自适应控制抗震分析

Self-adaptive Control Analysis of Piezoelectric Friction Damper

根据压电摩擦阻尼器反应迅速的特点设计局部速度反馈控制,作为局部控制策略。局部速度反馈控制使压电摩擦阻尼器的摩擦力同阻尼器两端的相对速度成正比,使具有局部速度反馈控制的压电摩擦阻尼器有粘滞阻尼的特点,能够抑制结构位移和速度响应,而且又不会对结构的加速度响应产生剧烈影响。试验结果表明局部速度反馈控制,用于调节压电摩擦阻尼器阻尼特性是十分有效的,它可以使结构在不增加加速度响应的条件下降低结构的位移和速度响应。

Based on the quick response feature of piezoelectric friction damper, a new control algorithm, i.e. the local velocity feedback control（LVFC） , was designed as the local control algorithm. The LVFC can adjust the damper＇s friction force in proportion with relative velocity of damper, made it acting like a viscous damper. It can suppress displacement and velocity responses of structure. The experiment result shows that local velocity feedback control is an efective algorithm for piezoelectric friction damper, and it can control structure displacement and velocity response without increment of acceleration response.