This paper discloses a stiff active interface wherein a six degree of freedom Stewart platform, a standard hexapod with a cubic architecture, is used to actively increase the structural damping of flexible systems attached to it. It can also be used to rigidly connect arbitrary substructures while damping them. Each leg of the active interface consists of a linear piezo electric actuator, a collocated force sensor and flexible tips for the connections with the two end plates. By providing the legs with strain or elongation sensors, this active interface can also be used as an interface with infinite stiffness at low frequency (i.e. for machine tools), a 6 d.o.f. positioning and steering device for space applications as well as a microvibration isolator. The translation and rotation strokes of the interface are 90, 103 and 95 microns in the x, y and z directions respectively and 1300, 1150 and 700 microrad around the x, y and z directions respectively.


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    Title :

    Piezoelectric Stewart platform for general purpose active damping interface and precision control


    Additional title:

    Piezoelektrische Stewart-Plattform als aktives Dämpfungssystem und als Feinsteuerung


    Contributors:
    Abu Hanieh, A. (author) / Preumont, A. (author) / Loix, N. (author)


    Publication date :

    2001


    Size :

    4 Seiten, 5 Bilder, 11 Quellen




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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