An experimental study on the active shape control of a smart cable-stayed bridge model

Abstract

SUMMARY This paper presents an experimental investigation of a ‘smart’ cable‐stayed bridge model that uses the mid‐span strain as feedback, and a computer‐controlled direct current motor as an actuator. When a load is moved on the ‘smart’ bridge, the deflection of the bridge can be controlled within a permissible range by means of the motor contracting or releasing the middle cable. An adaptive, multilevel, control system is implemented to control the bridge, and a number of static and dynamic tests are carried out. The results illustrate that the proposed adaptive control performance under various moving loads can be achieved within a prescribed motion range and limited control motor speed. Copyright © 2012 John Wiley & Sons, Ltd.

Scalable distributed optimal control of vibrating modular structures

“…The linear system represents the dynamics of a wide range of smart structures that can be controlled by integrated force actuators. Apart from the typical examples of such structures, namely, bridges and slender buildings exposed to earthquake or wind forces, offshore platforms subjected to sea waves or wind turbine blades exposed to wind flow which are controlled by means of electric motors or active tuned mass systems, we can also see new emerging designs that employ piezoelectric actuators and shape memory alloys or polymer‐based artificial muscles . In the present paper, we will consider a modular cantilever beam equipped with a set of electromagnetic force actuators.…”