Development of Moving Spars for Active Aeroelastic Structures

Michael Amprikidis, Jonathan E. Cooper

    Research output: Chapter in Book/Report/Conference proceedingConference contribution


    This paper describes a research program investigating the development of "moving spars" to enable active aeroelastic control of aerospace structures. A number of different concepts have been considered as part of the EU funded Active Aeroelastic Aircraft Structures (3AS) project that enable the control of the bending and torsional stiffness of aircraft wings through changes in the internal aircraft structure. The aeroelastic behaviour, in particular static deflections, can be controlled as desired through changes in the position, orientation and stiffness of the spars. The concept described in this paper is based upon translational movement of the spars. This will result in changes in the torsional stiffness and shear centre position whilst leaving the bending stiffness unaffected. An analytical study of the aeroelastic behaviour demonstrates the benefits of using such an approach. An experimental investigation involving construction and bench testing of the concepts was undertaken to demonstrate its feasibility. Finally, a wind tunnel test of simple wing models constructed using these concepts was performed. The simulated and experimental results show that it is possible to control the wind twist in practice.
    Original languageEnglish
    Title of host publicationProceedings of SPIE - The International Society for Optical Engineering|Proc SPIE Int Soc Opt Eng
    EditorsE.H. Anderson
    Number of pages7
    Publication statusPublished - 2003
    EventSmart Structures and Materials 2003: Industrial and Commercial Applications of Smart Structures Technologies - San Diego, CA
    Duration: 1 Jul 2003 → …


    ConferenceSmart Structures and Materials 2003: Industrial and Commercial Applications of Smart Structures Technologies
    CitySan Diego, CA
    Period1/07/03 → …


    • 3AS
    • Active Aeroelastic Structures
    • Aeroelasticity
    • Flexible Wings
    • Smart Structures


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