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Vibration Control of Active Structures

Part of the book series: Solid Mechanics and Its Applications ((SMIA,volume 246))

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Abstract

This chapter summarizes a few projects which have been conducted in the early days of the Active Structures Laboratory of ULB (mostly before 2002) in various fields including active damping, precision positioning, and vibroacoustics; all of them include numerical and experimental results. After a few words about digital control, the chapter begins with the active damping of a truss structure, followed by a six-axis piezoelectric Stewart platform that is proposed as generic damping interface (it can also be used for precision positioning). Next, the active damping of a piezoelectric plate is considered, with an experiment flown in 1995. It is followed by the active damping of a stiff beam using acceleration feedback and a proof-mass actuator. The next section, on HAC/LAC control, shows how embedding a collocated active damping loop in a non-collocated precision control may be effective in increasing the control bandwidth. The next section is devoted to the development of a sound radiation sensor for active structural acoustic control; the starting point is a discrete array of piezoelectric sensors; finally, a distributed sensor forming a porous electrode is developed successfully, all computations being confirmed by experiments. The chapter concludes with a short list of references and a set of problems.

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Notes

  1. 1.

    The implementation of the IFF controller presented here is that done at the time of this experiment. Other aspects of the control implementation, particularly concerning the recovery of the static stiffness of the uncontrolled structure, will be addressed in Sect. 15.5.

  2. 2.

    The electrode shape in Fig. 14.28 is nearly that obtained by cutting parabolic strips in two orthogonal directions.

References

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Active damping of a truss

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Vibroacoustics

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Authors and Affiliations

  1. Active Structures Laboratory, Université Libre de Bruxelles, Brussels, Belgium

    André Preumont

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  1. André Preumont
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Correspondence to André Preumont .

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Preumont, A. (2018). Applications. In: Vibration Control of Active Structures. Solid Mechanics and Its Applications, vol 246. Springer, Cham. https://doi.org/10.1007/978-3-319-72296-2_14

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  • DOI: https://doi.org/10.1007/978-3-319-72296-2_14

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-72295-5

  • Online ISBN: 978-3-319-72296-2

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