TY - GEN
T1 - Control objectives for seismic simulators
AU - Gavin, Henri P.
AU - Hoagg, Jesse B.
PY - 2009
Y1 - 2009
N2 - Seismic simulators are designed to recreate the effects of seismic activity on structural and geotechnical systems. The performance objective in recreating the effects of a particular ground motion on a test article is typically for the seismic simulator to track the pre-recorded motion of a particular historical earthquake. The reference signal is often the earthquake acceleration, as the dynamic loads imparted upon the structure are proportional to this acceleration. During seismic simulations, interactions between the test article and the actuators may be significant; the inertia forces of the test article may not be much less than the actuator force capacity. In such cases, the table motion is not an exogenous input to the test article, but is an aspect of the response of these two coupled systems. This study examines the suitability of actuator acceleration tracking accuracy as the performance objective for seismic simulators by examining the dynamics of linearized models for coupled systems of actuators and test articles. A test metric related to the test system inertia and the test article inertia indicates the degree to which accurate accelogram tracking may not recreate the desired prototype responses.
AB - Seismic simulators are designed to recreate the effects of seismic activity on structural and geotechnical systems. The performance objective in recreating the effects of a particular ground motion on a test article is typically for the seismic simulator to track the pre-recorded motion of a particular historical earthquake. The reference signal is often the earthquake acceleration, as the dynamic loads imparted upon the structure are proportional to this acceleration. During seismic simulations, interactions between the test article and the actuators may be significant; the inertia forces of the test article may not be much less than the actuator force capacity. In such cases, the table motion is not an exogenous input to the test article, but is an aspect of the response of these two coupled systems. This study examines the suitability of actuator acceleration tracking accuracy as the performance objective for seismic simulators by examining the dynamics of linearized models for coupled systems of actuators and test articles. A test metric related to the test system inertia and the test article inertia indicates the degree to which accurate accelogram tracking may not recreate the desired prototype responses.
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U2 - 10.1109/ACC.2009.5160748
DO - 10.1109/ACC.2009.5160748
M3 - Conference contribution
AN - SCOPUS:70449657716
SN - 9781424445240
T3 - Proceedings of the American Control Conference
SP - 3932
EP - 3937
BT - 2009 American Control Conference, ACC 2009
T2 - 2009 American Control Conference, ACC 2009
Y2 - 10 June 2009 through 12 June 2009
ER -