Simultaneous optimal design of the structural model for the semi-active control design and the model-based semi-active control

Abstract

SUMMARY Various semi‐active control methods have been proposed for vibration control of civil structures. In contrast to active vibration control systems, all semi‐active control systems are essentially asymptotically stable because of the stability of general structural systems with structural damping and the energy dissipative nature of the semi‐active control itself. In this study, by utilizing the aforementioned property on the stability of semi‐active control systems, a structural model for the semi‐active control design and a model‐based semi‐active control law are simultaneously designed so that the control performance of the resulting semi‐active control system becomes good. The model for the control system design is assumed to be a linear parameter varying model with adjustable structural design parameters. The semi‐active control law is based on the one step ahead prediction of the structural response of the designed model for the control system design. A genetic algorithm is adopted to obtain design parameters in the model for the control system design and the semi‐active control law. Those design parameters are optimized so that the closed‐loop system with the detailed dynamic model that accurately approximates the dynamic behavior of the real structural system and the semi‐active control law obtained with the model for the control system design. The effectiveness of the present approach is shown with a simulation study. Copyright © 2013 John Wiley & Sons, Ltd.

Seismic Proofing Capability of the Accumulated Semiactive Hydraulic Damper as an Active Interaction Control Device with Predictive Control

“…An Active Interaction Control (AIC) system was proposed by Iwan [10][11][12][13][14][15]. In this study, the Accumulated Semiactive Hydraulic Damper (ASHD) proposed by Shih et al [16][17][18] is converted to a Hydraulic Interaction Element (IE) based on the energy-dissipating function of the ASHD.…”

“…However, damaged buildings need to be reinforced as quickly as possible, for aftershocks can cause further damage or total collapse before the designated life span of the buildings. To mend this kind of building, many researchers have developed active [1][2][3][4] or semiactive [5][6][7][8][9][10] bracings. For example, Chung et al [1] carried out an experimental study on a building structure with active control subjected to base motion.…”

“…Pourzeynali and Jooei [9] proposed a particular type of semiactive control device, the Variable Stiffness Device (VSD), and applied a Semiactive Fuzzy Logic Controller (SFLC) to this system to optimize the seismic reduction of the building responses under earthquake excitations. Hiramoto et al [10] proposed a structural model for a semiactive control design and a model-based semiactive control law to improve the performance of the semiactive control system.…”

Technical Note: Active and Semi-Active Strategies to Control Building Structures Under Large Earthquake Motion

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Double-layer vibration suppression bilinear system featuring electro-rheological damper with optimal damping and semi-active control

“…The particular benefits of semi-active methods are that the parameters of the system can be changed with time to retain optimal performance and higher levels of optimization can be achieved due to the rapid time-variation achievable. The semi-active control method has received much attention since it can achieve desirable performance than the passive method and consume much less power than the active method [11,12].…”