The present work describes the electrical, mechanical and acoustical behavior of a thin honey-comb structure as an acoustic source. The acoustic source has to operate in the low frequency, quasi-static regime and is driven by a piezoelectric stack actuator. In addition, a two-way energy flow between the actuator and a connected amplifier is investigated. In particular, the effectiveness of energy recovery from the reactive components of the acoustic source is evaluated to improve the overall radiation efficiency. A lumped model is used to represent the acoustic source that is excited by a stacked piezoelectric element. The required power supply and resulting radiation efficiency are evaluated when a conventional analogue amplifier is used. The result is compared to the case in which some parts of the stored power are recovered and sent back to the connected switching amplifier. The study reveals 20% increase in the radiation efficiency and more than 80% decrease in the amount of required input power through recovering the reactive power in the system.
|Title of host publication||Proceedings ISMA 2016|
|Place of Publication||Leuven|
|Publisher||Katholieke Universiteit Leuven|
|Publication status||Published - 2016|
|Event||27th International Conference on Noise and Vibration Engineering, ISMA 2016 - Heverlee, Belgium|
Duration: 19 Sep 2016 → 21 Sep 2016
Conference number: 27
|Conference||27th International Conference on Noise and Vibration Engineering, ISMA 2016|
|Period||19/09/16 → 21/09/16|
Tajdari, F., Berkhoff, A. P., & de Boer, A. (2016). Numerical modeling of electrical-mechanical-acoustical behavior of a lumped acoustic source driven by a piezoelectric stack actuator. In P. Sas (Ed.), Proceedings ISMA 2016 (pp. 1261-1275). Leuven: Katholieke Universiteit Leuven.