An experimental and analytical synthesis of controlled structure design

Peterson, Lee D.; Allen, James J.; Lauffer, J.P.; Miller, Anna

doi:10.2514/6.1989-1170

Cited by 12 publications

(1 citation statement)

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“…Experimental verification of passive piezoelectric damping in a laboratory structure is described in Ref. [18]. The shunted piezoelectric itself could also be used as a damped structural actuator in a control system, as will be discussed later in this paper.…”

Section: Motivationmentioning

confidence: 99%

<title>Design of passive piezoelectric damping for space structures</title>

et al. 1993

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Passive damping of structural dynamics using piezoceramic electromechanical energy conversion and passive electrical networks is a relatively recent concept with little implementation experience base. This report describes an implementation case study, starting from conceptual design and technique selection, through detailed component design and testing to simulation on the structrure to be damped. About 0.5kg. of piezoelectric material was employed to damp the ASTREX testbed, a 5000kg structure. Emphasis was placed upon designing the damping to enable high bandwidth robust feedback control. Resistive piezoelectric shunting provided the necessary broadband damping. The piezoelectric element was incorporated into a mechanically-tuned vibration absorber in order to concentrate damping into the 30 to 40Hz frequency modes at the rolloff region of the proposed compensator. A prototype of a steel flex-tensional motion amplification device was built and tested. The effective stiffness and damping of the flex-tensional device was experimentally verified. When six of these effective springs are placed in an orthogonal configuration, strain energy is absorbed from all six degrees of freedom of a 90kg. mass.A NASTRAN finite element model of the testbed was modified to include the sixspring damping system. An analytical model was developed for the spring in order to see how the flex-tensional device and piezoelectric dimensions effect the critical stress and strain energy distribution throughout the component. Simulation of the testbed demonstrated the damping levels achievable in the completed system.

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Section: Motivationmentioning

confidence: 99%