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Control algorithm for estimating future responses of active variable stiffness structure
Author(s) -
Yamada Kazuhiko,
Kobori Takuji
Publication year - 1995
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.4290240804
Subject(s) - excitation , stiffness , algorithm , set (abstract data type) , energy (signal processing) , sine , variable (mathematics) , structural engineering , mathematics , engineering , computer science , mathematical analysis , geometry , statistics , electrical engineering , programming language
A control algorithm has been developed for controlling Active Variable Stiffness (AVS) structures. This algorithm analyses information of an observed seismic excitation, estimates the future structural responses and determines how to alter the structure stiffness. An objective structure is assumed to possess N on‐off elements whose states are controlled by the proposed algorithm. That is, at a given moment t k , (1) seismic excitation information is expressed by an Auto Regressive (AR) model as the identification model; (2) future excitation information is predicted using the AR model; (3) future responses due to predicted excitation are estimated; (4) based on the initial condition at t k , the responses of 2 N possible structural states from t k , to t k + L are calculated; (5) the state which minimizes the input energy during t L is selected; and (6) immediately after t k , on‐off elements are set up and subjected to the selected states. The effectiveness of the induced algorithm is confirmed by numerical experiments on a model of a three‐storey building under sine and seismic excitations.