Active damping control unit using a small scale proof mass electrodynamic actuator

González Díaz, Cristóbal, Paulitsch, Christoph and Gardonio, Paolo (2008) Active damping control unit using a small scale proof mass electrodynamic actuator. Journal of the Acoustical Society of America, 124 (2), 886-897. (doi:10.1121/1.2945167).

Record type: Article

Abstract

This paper presents a study on the design and use of a small scale proof mass electrodynamic actuator, with a low mounting resonance frequency, for velocity feedback control on a thin rectangular panel. A stability-performance formula is derived, which can be effectively used to assess the down scaling effects on the stability and control performance of the feedback loop. The design and tests of a velocity feedback loop with a prototype small scale proof mass actuator are also presented. When a feedback control having a gain margin of about 6 dB is implemented, so that there is little control spillover effect around the fundamental resonance of the actuator, reductions of vibration between 5 dB and 10 dB in the frequency band between 80 Hz and 250 Hz have been measured at the control position.

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