摘要
针对由LQG(LinearQuadraticGaussian)控制器设计的MR阻尼器半主动控制律鲁棒性差的问题,采用LQG/LTR(LinearQuadraticGaussian/LoopTransferRecovery)方法,使LQG闭环系统控制力返回比尽量逼近对应的LQR(LinearQuadraticRegulator)闭环系统的控制力返回比,得到具有改善鲁棒性的LQG控制器,然后按照某种规则设计磁流变(Magnetorheological:MR)阻尼器半主动控制律。最后对三层被控框架结构进行地震响应分析,数值结果表明由LQG/LTR得到的半主动控制律控制性能相比于由LQG得到的半主动控制律具有较好的鲁棒性和稳定性,并达到了LQR半主动控制律的控制水平。
It is known that the robustness of the semi-active control law for Magnetorheological (MR) damper based on the conventional Linear Quadratic Gaussian (LQG) method is often poor. The Linear Quadratic Gaussian/Loop Transfer Recovery (LQG/LTR) technique is first employed to design a new semi-active control law with better robustness. The new semi-active control law for MR damper is obtained based on the LQG/LTR controller and the rule of maximal dissipating energy. Thus, the closed-loop system becomes insensitive to measurement noise and model parameter variation. A numerical example is presented to verify the semi-active control law. Simulation results show that the semi-active control law has better robustness and stability than that of the conventional LQG method.
出处
《工程力学》
EI
CSCD
北大核心
2004年第1期112-117,共6页
Engineering Mechanics
