Comparative assessment of linear quadratic algorithm between real and independent modal space
In this study,the performance of the structural system is evaluated under the action of linear quadratic Gaussian(LQG)algorithm applied in an independent modal space control(IMSC)and the LQG control algorithm applied to the actual space.The ideal application of IMSC LQG control algorithm needs equal number of actuators to that of the degrees of freedom(DOF)of the system.In this study,only one actuator is used for controlling the response of the structure and the control force is obtained by using the least square method.The control objectives are set to minimize the displacement responses of a multi-degree-of-freedom(MDOF)system under an earthquake excitation.The efficiency of both control algorithms is demonstrated considering a numerical example of a shear building with uniform distribution of mass and stiffness.The results are compared from both algorithms in terms of the system response and control force.It is observed from the study that the specific application of the IMSC LQG control that minimizes the spill-over phenomena,performs more efficiently as compared to the LQG control algorithm,without loss of any optimality.
LQG control Independent modal space control (IMSC) Optimization Control spill-over
Sanjukta Chakraborty Xiaodong Ji
Department of Civil Engineering,Tsinghua University,Beijing 100084,China
国际会议
The 7th World Conference on Structural Control and Monitoring(7WCSCM)(第七届结构控制与监测世界大会)
青岛
英文
3179-3186
2018-07-22（万方平台首次上网日期，不代表论文的发表时间）