Pairs of colocated piezoelectric transducers, independently controlled by multichannel adaptive controller, employed as actuators and sensors to achieve simultaneous attenuation of both extensional and flexural motion. Single pair used to provide simultaneous control of flexural and extensional waves, or two pairs used to control torsional motion also. Capability due to nature of piezoelectric transducers, when bonded to surfaces of structures and activated by oscillating voltages, generate corresponding oscillating distributions of stresses in structures. Phases and amplitudes of actuator voltages adjusted by controller to impede flow of vibrational energy simultaneously, in waves of various forms, beyond locations of actuators. Concept applies equally to harmonic or random response of structure and to multiple responses of structure to transverse bending, torsion, and compression within structural element. System has potential for many situations in which predominant vibration transmission path through framelike structure.


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    Titel :

    Active Suppression Of Vibrations On Elastic Beams


    Beteiligte:

    Erschienen in:

    Erscheinungsdatum :

    01.09.1993



    Medientyp :

    Sonstige


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    Active Suppression of Rotor Vibrations

    Dirusso, Eliseo | NTRS | 1987




    Free vibrations of stepped beams with elastic ends

    Rosa, M.A.De | Online Contents | 1994


    Active control of flexural vibrations in beams

    Gerhold, Carl H. / Rocha, Rodney | NTRS | 1989