Adaptive Vibration Suppression System: An Iterative Control Law for a Piezoelectric Actuator Shunted by a Negative Capacitor

0435182 - ÚFP 2015 RIV US eng J - Článek v odborném periodiku
Kodejska, M. - Mokrý, Pavel - Linhart, V. - Václavík, Jan - Sluka, T.
Adaptive Vibration Suppression System: An Iterative Control Law for a Piezoelectric Actuator Shunted by a Negative Capacitor.
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. Roč. 59, č. 12 (2012), s. 2785-2796. ISSN 0885-3010. E-ISSN 1525-8955
Grant CEP: GA MŠMT(CZ) ED2.1.00/03.0079
Institucionální podpora: RVO:61389021
Klíčová slova: ELASTICITY CONTROL * HARMONIC EXCITATIONS * STRUCTURAL VIBRATION * FEEDBACK-CONTROL * CIRCUITS * MEMBRANE
Kód oboru RIV: BI - Akustika a kmity
Impakt faktor: 1.822, rok: 2012

An adaptive system for the suppression of vibration transmission using a single piezoelectric actuator shunted by a negative capacitance circuit is presented. It is known that by using a negative-capacitance shunt, the spring constant of a piezoelectric actuator can be controlled to extreme values of zero or infinity. Because the value of spring constant controls a force transmitted through an elastic element, it is possible to achieve a reduction of transmissibility of vibrations through the use of a piezoelectric actuator by reducing its effective spring constant. Narrow frequency range and broad frequency range vibration isolation systems are analyzed, modeled, and experimentally investigated. The problem of high sensitivity of the vibration control system to varying operational conditions is resolved by applying an adaptive control to the circuit parameters of the negative capacitor. A control law that is based on the estimation of the value of the effective spring constant of
Trvalý link: http://hdl.handle.net/11104/0239102