Abstract:
This paper applies the dynamic model reduction
method to obtain a reduced order model of an experimental tall
building which has twenty floors and is 2.5m high. The
experimental model is designed to imitate a real tall building
with an active mass damper, and is used to study the available
modelling and active control strategies for real tall buildings.
Based on the dynamic model reduction method, a reduced order
model is used within a H∞ controller design to suppress
excessive vibrations induced by seismic excitation. The reduced
order model effectively describes only those frequency
characteristics from the full order model that are of interest.
The controller design based on the low order model can be
directly applied to the full order model without introducing the
control and observer spillover problems. Numerical simulations
confirm that the low order model is acceptable at describing the
relevant dynamic characteristics of the full order model and
that it can be used effectively to mitigate the vibration caused by
seismic disturbances.
