摘要
等效力控制方法用反馈控制代替数学迭代过程求解实时子结构试验隐式逐步积分方法的非线性方程。对于非线性结构试验,采用比例-微分(PD)控制器的等效力控制方法会使等效力响应产生稳态误差。该文用比例-积分(PI)控制器代替PD控制器以解决此问题。分析与模拟的结果都表明,对于非线性体系的等效力控制方法试验,PI控制优于PD控制。
The equivalent force control method replaces the mathematical iteration with feedback control strategy to solve the nonlinear equations of motion in real-time substructure testing with implicit integration method. For nonlinear structural tests, the equivalent force control method with proportional-derivative （PD） controller will induce a steady-state error of the equivalent force response. This paper chooses the proportional-integral （PI） controller, instead of the PD controller previously used, to eliminate the error. The analytical and simulated results show that the equivalent force control method with PI controller is more effective for nonlinear structural tests compared to that with PD controller.
出处
《工程力学》
EI
CSCD
北大核心
2009年第9期251-256,共6页
Engineering Mechanics
基金
国家自然科学基金项目(50578047
90715036)
教育部新世纪优秀人才支持计划项目
关键词
结构试验技术
实时子结构试验
等效力控制方法
比例-积分控制器
稳态误差
seismic testing
real-time substructure testing
equivalent force control method
proportionalintegral controller
steady-state error
