Details of Grant 

EPSRC Reference:	GR/S49780/01
Title:	Dynamics and control of hybrid systems with applications to real-time dynamic substructuring
Principal Investigator:	Wagg, Professor DJ
Other Investigators:
Researcher Co-Investigators:
Project Partners:
Department:	Mechanical Engineering
Organisation:	University of Bristol
Scheme:	Standard Research (Pre-FEC)
Starts:	16 February 2004	Ends:	15 September 2007	Value (£):	165,210
EPSRC Research Topic Classifications:	Control Engineering Eng. Dynamics & Tribology Non-linear Systems Mathematics
EPSRC Industrial Sector Classifications:	Construction
Related Grants:
Panel History:	Panel Date Panel Name Outcome 28 May 2003 Engineering Advanced Fellowships Interview Panel Deferred 02 May 2003 Engineering Fellowships Sift Panel 2003 Deferred
Summary on Grant Application Form
Real-time dynamic substructuring is a new experimental testing technique which overcomes the problem of interpreting results from small scale model testing. This is done by testing only a single component of the system at full scale while the remaining part of the system is modelled using a computer model. The whole process must take place in real-time, with a control algorithm used to link the two parts of the model together. So far, simple substructuring tests have been carried out for linear systems with a small number of (typically one) coupling points. The aim of this proposal is to develop substructuring techniques which can be used to model complex nonlinear engineering systems. To achieve this, a multi-actuator experimental testing rig will be designed and constructed. To carry out real-time adaptive control for nonlinear systems, new control approaches will need to be developed and implemented. Once the experimental test-bed is commissioned, two sets of experiments will be performed. The first will use a single pendulum as the experimental test piece, coupled with a numerical spring-mass-damper model. This system will test substructuring capability for highly nonlinear behaviour such as autoparametric resonance. The second set of experiments aims to study the problem of coupled nonlinear systems, using two coupled pendula as experimental test pieces. There are significant potential benefits of this work to applications such as earthquake engineering.
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Organisation Website:	http://www.bris.ac.uk