Title

Optimal Resonance Frequency Detuning Switch Trigger Determination Using Measurable Response Characteristics

Abstract

For systems experiencing transient vibration associated with passage through resonance, resonance frequency detuning (RFD) offers a source of vibration reduction by altering the stiffness state of the structure as the swept excitation frequency approaches any resonance frequency. The peak response dynamics and overall maximum amplitude reduction is governed by the sweep rate, modal damping ratio, electromechanical coupling coefficient, and the point at which this stiffness switch occurs, and the optimal switch trigger has been established when all system information is readily available. This study investigates a method of determining the optimal switch trigger using only the open-circuit piezoelectric voltage time response. For the purposes of simulation, a curve fit is employed and a subsequent optimal trigger control law is extracted. This empirical control law agrees well with and produces comparable response to that of the optimal control determined using perfect and complete knowledge of the system.

Publication Date

1-1-2015

Publication Title

23rd AIAA/AHS Adaptive Structures Conference

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.2514/6.2015-1258

Socpus ID

85086054904 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85086054904

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