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Hybrid mass dampers using two types of electric servomotors: AC servomotors and linear‐induction servomotors
Author(s) -
Nakamura Y.,
Tanaka K.,
Nakayama M.,
Fujita T.
Publication year - 2001
Publication title -
earthquake engineering and structural dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.218
H-Index - 127
eISSN - 1096-9845
pISSN - 0098-8847
DOI - 10.1002/eqe.89
Subject(s) - servomotor , tuned mass damper , engineering , linear induction motor , control engineering , vibration control , damper , control system , drivetrain , vibration , control theory (sociology) , induction motor , computer science , torque , control (management) , mechanical engineering , voltage , electrical engineering , physics , quantum mechanics , artificial intelligence , thermodynamics
A hybrid mass damper (HMD) using an electric servomotor for vibration control of buildings has been developed. The developed HMD has been installed in three buildings in order to improve habitability during strong winds and small‐to‐moderate earthquakes. We speculated that its high performance, compactness, and high reliability are important factors in its practical application to actual buildings. We have designed and installed the HMD system with suitable specifications for the size and demands of various object buildings. Several improvements were required for each application, e.g., the adoption of an active/passive‐mode switching mechanism and fault diagnosis method, countermeasures for scaling up of the device, a linear‐induction servomotor, and a design controller based on the H ‐infinity control theory. In this paper, techniques relevant to vibration‐control system design, an outline of applied HMD, the design of the control system, and the verified results of control performance are presented. Through several vibration tests and field observations on each building during high winds and earthquakes, the efficiency of the applied HMD system was examined and verified. Copyright © 2001 John Wiley & Sons, Ltd.