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Tendon Control of Cable Structures

Contact : André Preumont

Motivation

The main span of current cable-stayed bridges can reach 800m or more (Normandy bridge, France), and future projects are expected to exceed 1000m. These structures are vulnerable to wind induced vibrations and flutter. The situation can be improved by increasing the damping in the system. Other applications to large space structures are also considered.

Control strategy

The key feature of our control strategy is the use of a decentralized control system with collocated actuator/sensor pairs (displacement actuator and force sensor). For this configuration, the Integral Force Feedback (IFF) leads to guaranteed stability. An approximate root locus technique has been developed, which allows to predict the closed-loop poles when the set of active cables has been selected.

Related contract

1997 : EEC-BRITE/EURAM-BE96-3334: Active Control in civil Engineering (ACE) (Collaboration BOUYGUES, Mannesmann-Rexroth, DRA, MTS, Johs.Holt A.S., VSL, JRC Ispra, TU Dresden)