基于预测算法的结构振动半主动控制

SEMI-ACTIVE CONTROL FOR STRUCTURAL VIBRATION BASED ON PREDICTIVE ALGORITHM

根据离散时间状态下的Newmark时域积分方法预测结构响应值,通过在一定范围内寻找适当的控制力参数使目标函数最优,达到对结构振动响应的预测控制。对地震波作用下配置磁流变阻尼器的的两层框架结构进行数值分析,讨论控制策略中有关参数变化对振动抑制效果的影响。分析结果表明基于Newmark-β预测算法的结构振动响应半主动控制优于基于全局最优解的经典反馈控制系统,控制效果明显、鲁棒性好。

Based on Newmark-β method, a structural vibration response is predicted. Through finding the appropriate control force parameters within certain ranges to optimize the objective function, the predictive control of the structural vibration is achieved. At the same time, the numerical simulation analysis of a two-storey frame structure with magnetorheological (MR) dampers under earthquake records is carried out, and the parameter influence on structural vibration reduction is discussed. The results demonstrate that the semi-active control based on Newmark-β predictive algorithm is better than the classical control strategy based on full-state feedback control and has remarkable advantages of structural vibration reduction and control robustness.