New spectra of responses and control force for design of equivalent-input-disturbance-based active structural control of base-isolated buildings

2021 ◽  
pp. 116160
Author(s):  
Kou Miyamoto ◽  
Daiki Sato ◽  
Jinhua She ◽  
Yinli Chen ◽  
Qing-Long Han
Keyword(s):  
Structural Control ◽  
Control Force ◽  
Input Disturbance ◽  
Active Structural Control ◽  
Equivalent Input Disturbance ◽  
And Control

Active Structural Control Based on Integration ofΗ∞Control and Equivalent-Input-Disturbance Approach

2016 ◽  
Vol 20 (2) ◽  
pp. 197-204 ◽  
Author(s):  
Mingxing Fang ◽  
◽  
Lijun Wu ◽  
Jing Cheng ◽  
Youwu Du ◽  
...  
Keyword(s):  
Control System ◽  
Structural Control ◽  
Control Structure ◽  
Vibration Signal ◽  
Control Input ◽  
Building Structures ◽  
System Configuration ◽  
Input Disturbance ◽  
Active Structural Control ◽  
Equivalent Input Disturbance

This paper describes an approach for suppressing earthquake-induced vibrations of building structures. The design of the control system is based on the equivalent-input-disturbance approach for improving the vibration rejection performance. A control system configuration with a vibration estimator is described, and a method of designing such a control system that employsΗ∞control is presented. The vibration rejection performance is guaranteed by the control structure, in which an equivalent vibration signal on the control input channel is estimated and directly incorporated into the control input. The validity of our method is demonstrated through simulations.

scholarly journals Modified LQG/LTR Control Methodology in Active Structural Control

2003 ◽  
Vol 22 (2) ◽  
pp. 97-108 ◽  
Author(s):  
Yan Sheng ◽  
Chao Wang ◽  
Ying Pan ◽  
Xinhua Zhang
Keyword(s):  
Structural Control ◽  
Signal To Noise Ratio ◽  
Open Loop ◽  
Control Force ◽  
Linear Quadratic ◽  
Linear Quadratic Gaussian ◽  
Control Approach ◽  
Active Structural Control ◽  
Loop Transfer Recovery ◽  
Control Methodology

This paper presents a new active structural control design methodology comparing the conventional linear-quadratic-Gaussian synthesis with a loop-transfer-recovery (LQG/LTR) control approach for structures subjected to ground excitations. It results in an open-loop stable controller. Also the closed-loop stability can be guaranteed. More importantly, the value of the controller's gain required for a given degree of LTR is orders of magnitude less than what is required in the conventional LQG/LTR approach. Additionally, for the same value of gain, the proposed controller achieves a much better degree of recovery than the LQG/LTR-based controller. Once this controller is obtained, the problems of control force saturation are either eliminated or at least dampened, and the controller band-width is reduced and consequently the control signal to noise ratio at the input point of the dynamic system is increased. Finally, numerical examples illustrate the above advantages.

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