Developing the Next Generation Framework for Testing Nonlinear Dynamic Structures.

Project Information

TNS

Grant agreement ID: 703204

DOI 10.3030/703204

Project terminated on 1 December 2016

EC signature date 14 March 2016

Start date 1 May 2016

End date 30 April 2018

Funded under

• EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions

Total cost € 183 454,80

EU contribution € 183 454,80

Coordinated by

UNIVERSITY OF BRISTOL
United Kingdom

Objective

When designing new structures and devices, engineers are completely dependent on mathematical models to ensure that their designs function as intended. As technological boundaries are pushed to the limits, systems become nonlinear – the response of the system is no longer proportional to the input. These nonlinear systems can exhibit a wide range of complicated behaviour that is very difficult to predict and potentially disastrous. Take for example the F-117A Night Hawk stealth jet. Despite extensive modelling and design work, at an airshow in 1997 in Maryland, Essex, USA, it encountered a disastrous instability known as flutter. The aircraft was lost.

Until now there has been no general-purpose systematic method that can directly measure and characterise nonlinear dynamic behaviour during laboratory tests; hence it is extremely challenging to incorporate nonlinear features into the model development and validation process.

Control-based continuation (CBC) is a systematic method designed to fill this void in the nonlinear test and measurement field. Thought the method has already been demonstrated on several simple mechanical systems, it is still in its infancy and lacks robustness. The specific objectives of the research proposed here are to develop and incorporate in CBC effective and noise-robust algorithms and control strategies, hence leading to a solid and more general framework for testing nonlinear dynamic systems. The method will be demonstrated experimentally including on an aeroelastic rig that exhibits potentially dangerous flutter-induced limit cycle oscillations in a wind-tunnel.

Fields of science

• natural sciences › computer and information sciences › software
• engineering and technology › electrical engineering, electronic engineering, information engineering › electronic engineering › control systems
• engineering and technology › mechanical engineering › vehicle engineering › aerospace engineering › aircraft
• natural sciences › mathematics › applied mathematics › numerical analysis
• natural sciences › mathematics › applied mathematics › mathematical model

Keywords

• Nonlinear Dynamics
• Vibration
• Testing
• Continuation Techniques

Programme(s)

• H2020-EU.1.3. - EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions Main Programme
• H2020-EU.1.3.2. - Nurturing excellence by means of cross-border and cross-sector mobility

Topic(s)

• MSCA-IF-2015-EF - Marie Skłodowska-Curie Individual Fellowships (IF-EF)

Call for proposal

H2020-MSCA-IF-2015

Funding Scheme

MSCA-IF - Marie Skłodowska-Curie Individual Fellowships (IF)

Coordinator

UNIVERSITY OF BRISTOL

• Net EU contribution: € 183 454,80
• Address: BEACON HOUSE QUEENS ROAD ; BS8 1QU Bristol ; United Kingdom
• Region: South West (England) › Gloucestershire, Wiltshire and Bristol/Bath area › Bristol, City of
• Activity type: Higher or Secondary Education Establishments
• Total cost: € 183 454,80