Active control using piezoceramic linear motors

Mark D. Holcomb; Brett J. Pokines; Daniel J. Inman

doi:10.1117/12.174108

1 May 1994 Active control using piezoceramic linear motors

Mark D. Holcomb, Brett J. Pokines, Daniel J. Inman

Proceedings Volume 2193, Smart Structures and Materials 1994: Passive Damping; (1994) https://doi.org/10.1117/12.174108
Event: 1994 North American Conference on Smart Structures and Materials, 1994, Orlando, FL, United States

Abstract

Proof mass actuators have long been an accepted and reliable method of vibration control. With the advent of new piezoceramic technology, the proof mass can now be driven by a piezoceramic linear motor. A linear motor has been designed and its performance is evaluated by comparing it against a Physik Instrument piezoceramic stack translator. Both linear motors are used to actively add damping to the bending modes of a section of the NASA Phase Zero Evolutionary Model. A modal test has been done on the test structure and its mode shapes, natural frequencies and damping ratios have been recorded. In the unlikely event of a power failure on board such a structure, a backup control scheme is desired. Viscoelastic damping material is incorporated into the newly designed actuator to improve the stability of the closed loop system and to offer good `shut down' performance in case of a power failure. Actuator performance such as force output, stroke length, and control implementation are compared.

Citation Download Citation

Mark D. Holcomb, Brett J. Pokines, and Daniel J. Inman "Active control using piezoceramic linear motors", Proc. SPIE 2193, Smart Structures and Materials 1994: Passive Damping, (1 May 1994); https://doi.org/10.1117/12.174108

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