Title :
Nonlinear restoring force estimation in civil structures using a high gain observer
Author :
Garrido, R. ; Rivero-Angeles, J. ; Martinez-Guerra, R. ; Gomez-Gonzalez, B. ; Martinez-Garcia, J.C.
Author_Institution :
Dept. of Autom. Control, CINVESTAV-IPN, Mexico City, Mexico
Abstract :
Strong ground motions may cause damage to structural elements by cracking or yielding. Hysteresis cycles are a measure of this damage. The present paper uses a class of integral high gain observers to estimate the unknown nonlinear restoring force of a single-degree-of-freedom structure. Simulations are carried out using the Mexico City at SCT (1985) and the El Centro (1940) time history acceleration records as ground motion inputs. Encouraging results are obtained for the state and nonlinear restoring force estimation.
Keywords :
hysteresis; nonlinear estimation; observers; parameter estimation; structural engineering; El Centro; Mexico City; acceleration records; civil structures; ground motion; high gain observer; hysteresis cycle; nonlinear restoring force estimation; Cities and towns; Damping; Energy dissipation; Hysteresis; Motion estimation; Noise measurement; Nonlinear systems; Observers; State estimation; Vectors;
Conference_Titel :
Control Conference, 2004. 5th Asian
Conference_Location :
Melbourne, Victoria, Australia
Print_ISBN :
0-7803-8873-9
