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Synthesis and control of generalised dynamically substructured systems

Research output: Contribution to journalArticle

Original languageEnglish
Pages371 - 392
Number of pages21
JournalProceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering
Journal publication date2009
Journal issue3
Volume223
DOIs
StatePublished

Abstract

The experimental technique for testing engineering systems via the method of dynamic substructuring is receiving significant global interest, for example in the fields of large-scale structural, aerospace, and automotive system testing. Dynamically substructured systems (DSSs) enable full-size, critical components of a complete system to be physically tested in real-time, within a laboratory environment, while the remainder of the system is modelled numerically. The intention is that the combined physical–numerical DSS behaves as if it were the complete (or emulated) system. In an ideal mechanical DSS, for example, perfect synchronization of displacements and forces at the interfaces between the numerical and physical components (or substructures) is required. Hence, a key design feature of successful DSS systems is the high fidelity of the control action. Equally, a DSS controller must be able to cope with non-linear, time-varying, and uncertain parameters within the physical substructure dynamics. The main purpose of this paper is to present a generalized DSS framework, together with associated linear and adaptive control strategies, that are specifically tailored to achieve high synchronization performance. The initial studies of this problem, as described in an earlier paper by Stoten and Hyde, are therefore continued by generalizing both the DSS dynamics and the control strategies to include (a) a number of newly defined modes of operation and (b) multivariable dynamics. In addition, comparative implementation and simulation studies are included, based upon the DSS testing of a mechanical system (a planar quasi-motorcycle rig), which was specifically designed to highlight the main features of this research. The comparative studies show that excellent DSS control can be achieved, especially with the addition of an adaptive component to the controller, despite significant changes to the physical substructure dynamics.

Additional information

Publisher: Professional Engineering Publishing UK Engineering and Physical Science Research Council, grant: EP/D036917 Identifier: 0959-6518 (print), 2041-3041 (online)

Documents

  • 635 Stoten

    Rights statement: © Stoten, DP., Tu, J-Y. & Li, G., 2009. The definitive, peer reviewed and edited version of this article is published in Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering, 223(3), pp. 371-392, 2009.

    Preprint (usually an early version) , 2 MB, PDF-document

    27/07/12

DOI

Research areas

  • adaptive control, dynamic substructuring, minimal control synthesis algorithm

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