Equivalent-input-disturbance approach to active structural control for seismically excited buildings

• Published in: Engineering structures Vol. 125; pp. 392 - 399
• Main Authors: Miyamoto, Kou, She, Jinhua, Imani, Junya, Xin, Xin, Sato, Daiki
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 15.10.2016
• Subjects: Active structural control (ASC); Disturbance estimation; Equivalent input disturbance (EID); Linear-quadratic regulator (LQR); Seismic vibration; Sliding-mode control (SMC); Vibration suppression; Sliding-mode control (SMC); Linear-quadratic regulator (LQR); Disturbance estimation; Seismic vibration; Vibration suppression; Equivalent input disturbance (EID); Active structural control (ASC)
• ISSN: 0141-0296; 1873-7323
• DOI: 10.1016/j.engstruct.2016.07.028

•A new method of active structural control, which is based on the equivalent-input-disturbance approach, has been developed.•A ten-story building is used as an example to illustrate the design procedure.•Simulations demonstrated the validity of the method. A new method of active structural control, which suppresses vibrations in civil structures due to seismic shocks, has been developed. It is based on the equivalent-input-disturbance (EID) approach, which estimates the effect of a seismic shock and produces an equivalent control signal on the control input channel to compensate for it. A system designed by this method can be viewed as a conventional state-feedback control system with an EID estimator plugged in. Unlike conventional control systems, this one has two degrees of freedom, which yields better control performance. Simulations on a model of a ten-degree-of-freedom building demonstrated the validity of the method. In addition, the effect of the parameters of the low-pass filter in the EID estimator on the vibration suppression performance was examined. A comparison revealed that this method is superior to a linear-quadratic regulator and sliding-mode control.