Adaptive Synchronized Switch Damping On An Inductor: A Self-Tuning Switching Law

Keywords

piezoelectric; semi-active; SSDI; switching; vibration reduction; wideband

Abstract

Synchronized switch damping (SSD) techniques exploit low-power switching between passive circuits connected to piezoelectric material to reduce structural vibration. In the classical implementation of SSD, the piezoelectric material remains in an open circuit for the majority of the vibration cycle and switches briefly to a shunt circuit at every displacement extremum. Recent research indicates that this switch timing is only optimal for excitation exactly at resonance and points to more general optimal switch criteria based on the phase of the displacement and the system parameters. This work proposes a self-tuning approach that implements the more general optimal switch timing for synchronized switch damping on an inductor (SSDI) without needing any knowledge of the system parameters. The law involves a gradient-based search optimization that is robust to noise and uncertainties in the system. Testing of a physical implementation confirms this law successfully adapts to the frequency and parameters of the system. Overall, the adaptive SSDI controller provides better off-resonance steady-state vibration reduction than classical SSDI while matching performance at resonance.

Publication Date

2-13-2017

Publication Title

Smart Materials and Structures

Volume

26

Issue

3

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1088/1361-665X/aa5433

Socpus ID

85014868985 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85014868985

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