Abstract
We propose a vibration control method for the main tower of a large scale bridge and a method for constructing a reduced-order model using uncontrollability and unobservability. During the construction of the main tower, it is known that vibration modes including not only bending modes but also torsional ones are excited by strong winds, which may endanger construction workers and destroy main tower. Therefore it is necessary to control vibration of the main tower during construction. In this paper, a reduced-order model expressed by a 5DOF system to control the bending and torsional modes is proposed for preventing spillover instability using uncontrollability and unobservability. The LQ control and semioptimum control theories are applied for designing the control system. The control effects of the two systems are compared experimentally.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
