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A semi-active H∞ control strategy with application to the vibration suppression of nonlinear high-rise building under earthquake excitations.

Yan G, Chen F, Wu Y - Springerplus (2016)

Bottom Line: In this strategy, a modified Kalman-Bucy observer which is suitable for the proposed semi-active strategy is developed to obtain the state vector from the measured semi-active control force and acceleration feedback, taking into account of the effects of nonlinearity, disturbance and uncertainty of controlled system parameters by the observed nonlinear accelerations.It is indicated that the proposed semi-active H∞ control strategy provides much better control performances by comparison with the semi-active MPC and Clipped-LQG control approaches, and can reduce nonlinear seismic response and minimize the damage in the buildings.Besides, it enhances the reliability of the control performance when compared with the active control strategy.

View Article: PubMed Central - PubMed

Affiliation: Fujian Provincial Key Laboratory of Advanced Technology and Informatization in Civil Engineering, Department of Civil Engineering, Fujian University of Technology, Fuzhou, 350118 China.

ABSTRACT
Different from previous researches which mostly focused on linear response control of seismically excited high-rise buildings, this study aims to control nonlinear seismic response of high-rise buildings. To this end, a semi-active control strategy, in which H∞ control algorithm is used and magneto-rheological dampers are employed for an actuator, is presented to suppress the nonlinear vibration. In this strategy, a modified Kalman-Bucy observer which is suitable for the proposed semi-active strategy is developed to obtain the state vector from the measured semi-active control force and acceleration feedback, taking into account of the effects of nonlinearity, disturbance and uncertainty of controlled system parameters by the observed nonlinear accelerations. Then, the proposed semi-active H∞ control strategy is applied to the ASCE 20-story benchmark building when subjected to earthquake excitation and compared with the other control approaches by some control criteria. It is indicated that the proposed semi-active H∞ control strategy provides much better control performances by comparison with the semi-active MPC and Clipped-LQG control approaches, and can reduce nonlinear seismic response and minimize the damage in the buildings. Besides, it enhances the reliability of the control performance when compared with the active control strategy. Thus, the proposed semi-active H∞ control strategy is suitable for suppressing the nonlinear vibration of high-rise buildings.

No MeSH data available.


Related in: MedlinePlus

Bar chart comparing the evaluation criteria for various controllers
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Fig5: Bar chart comparing the evaluation criteria for various controllers

Mentions: Table 2 lists the values of the evaluation criteria for semi-active H∞ control, semi-active MPC (Yan 2006) and Clipped-LQG (Yoshida and Dyke 2004) systems subjected to different earthquakes with different intensity levels. To compare the efficiency of the three controlled strategies, Fig. 5 provides the contrast of the values for the maximum interstory drift ratio (J1), maximum absolute acceleration (J2), number of plastic hinges (J9) and maximum control force (J11). These values are derived from the various control systems for different earthquakes with different intensity levels.Table 2


A semi-active H∞ control strategy with application to the vibration suppression of nonlinear high-rise building under earthquake excitations.

Yan G, Chen F, Wu Y - Springerplus (2016)

Bar chart comparing the evaluation criteria for various controllers
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4940326&req=5

Fig5: Bar chart comparing the evaluation criteria for various controllers
Mentions: Table 2 lists the values of the evaluation criteria for semi-active H∞ control, semi-active MPC (Yan 2006) and Clipped-LQG (Yoshida and Dyke 2004) systems subjected to different earthquakes with different intensity levels. To compare the efficiency of the three controlled strategies, Fig. 5 provides the contrast of the values for the maximum interstory drift ratio (J1), maximum absolute acceleration (J2), number of plastic hinges (J9) and maximum control force (J11). These values are derived from the various control systems for different earthquakes with different intensity levels.Table 2

Bottom Line: In this strategy, a modified Kalman-Bucy observer which is suitable for the proposed semi-active strategy is developed to obtain the state vector from the measured semi-active control force and acceleration feedback, taking into account of the effects of nonlinearity, disturbance and uncertainty of controlled system parameters by the observed nonlinear accelerations.It is indicated that the proposed semi-active H∞ control strategy provides much better control performances by comparison with the semi-active MPC and Clipped-LQG control approaches, and can reduce nonlinear seismic response and minimize the damage in the buildings.Besides, it enhances the reliability of the control performance when compared with the active control strategy.

View Article: PubMed Central - PubMed

Affiliation: Fujian Provincial Key Laboratory of Advanced Technology and Informatization in Civil Engineering, Department of Civil Engineering, Fujian University of Technology, Fuzhou, 350118 China.

ABSTRACT
Different from previous researches which mostly focused on linear response control of seismically excited high-rise buildings, this study aims to control nonlinear seismic response of high-rise buildings. To this end, a semi-active control strategy, in which H∞ control algorithm is used and magneto-rheological dampers are employed for an actuator, is presented to suppress the nonlinear vibration. In this strategy, a modified Kalman-Bucy observer which is suitable for the proposed semi-active strategy is developed to obtain the state vector from the measured semi-active control force and acceleration feedback, taking into account of the effects of nonlinearity, disturbance and uncertainty of controlled system parameters by the observed nonlinear accelerations. Then, the proposed semi-active H∞ control strategy is applied to the ASCE 20-story benchmark building when subjected to earthquake excitation and compared with the other control approaches by some control criteria. It is indicated that the proposed semi-active H∞ control strategy provides much better control performances by comparison with the semi-active MPC and Clipped-LQG control approaches, and can reduce nonlinear seismic response and minimize the damage in the buildings. Besides, it enhances the reliability of the control performance when compared with the active control strategy. Thus, the proposed semi-active H∞ control strategy is suitable for suppressing the nonlinear vibration of high-rise buildings.

No MeSH data available.


Related in: MedlinePlus