An integrating genetic algorithm and modified Newton method for tracking control and vibration suppression
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An integrating genetic algorithm and modified Newton method for tracking control and vibration suppression Chuen-Jyh Chen1
© Springer Nature B.V. 2019
Abstract With the trend toward taller and more flexible building structures, a mass-damper shaking table system has been considered as means for vibration suppression to external excitation and disturbances in recent years. However, there are few researches on the control of nonlinear structure using active mass damper under earthquake excitation, especially for high-rise building. This study presents a model combining the advantages of adaptive genetic algorithm and modified Newton method is developed for system identification and vibration suppression of a building structure with an active mass damper. The genetic algorithm with adaptive reproduction, crossover, and mutation operators is to search for initial weight and bias of the neural network, while the modified Newton method, similar to BFGS algorithm, is to increase network training performance. Experimental results show that the controller performance is strongly influenced by the accuracy of system identification. The controller is also shown to be robust to variations in system parameters. Keywords Genetic algorithm · Modified Newton method · Tracking control · Vibration control
1 Introduction With the trend toward taller building structures, undesirable vibration levels can arise from large environmental loads such as strong wind and earthquakes. State-of-the-art active control techniques for building structures were reported by Soong (1988) and Yoshida (1994), in which some active control devices have been implemented. The tuned mass damper devices were seen in stacks, observatories, bridges, communication towers, and machinery foundations (Catalogue of Mitsubishi Heavy Industries, LTD. 2019, Tokyo, Japan). Extraordinary loading episodes can occur and cause casualties and structural damage. Development of mass-damper systems, such as tuned mass-dampers and active mass-dampers (AMD), has been introduced into high-rise buildings to reduce vibration. Vibration suppression of struc-
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Chuen-Jyh Chen [email protected] Department of Aviation and Maritime Transportation Management, Chang Jung Christian University, Tainan, Taiwan, ROC
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ture systems subject to external excitation and disturbances must be intensively studied (Li et al. 2010; Liu et al. 2011; Lazar et al. 2013; Wang et al. 2018). Recent research has been focusing on the applications of active mass damper (AMD) -an auxiliary mass with sensor, actuator and controller- to vibration suppression of a building structure (Chen 2012; Song et al. 2011). The progress in peripheral technologies, such as computation speed, low friction of linear bearing, and high horsepower servo motor have made active control feasible in structure systems (Korkmaz 2011). Conventionally, the proportional–integral–derivative (PID) controller dominates servo system applications; however, it is not sufficiently robust to accommodate external distu
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