Active control of a lumped acoustic source driven by various actuators
conference paper
This paper studies a lumped model of an acoustic source with a relatively small thickness and high bending stiffness. Voice coil and piezoelectric actuators are used to drive moving components of the acoustic source. Feedback and feedforward damping control techniques are used to actively obtain a smooth frequency response, especially at low frequencies. Such a compensation scheme generally leads to amplification of the lower frequencies and may result in a significant electrical input power. In addition, a part of the input power is stored in mechanical and acoustical elements of the acoustic source. The effectiveness of energy recovery from the reactive components of the acoustic source is evaluated to improve the overall performance of the acoustic source, and to decrease the amount of required input power. © 2017 Institute of Noise Control Engineering. All Rights Reserved.
Meetings and Exhibitions Hong Kong (MEHK)
Meetings and Exhibitions Hong Kong (MEHK)
Topics
Acoustic sourceActive damping controlPiezoelectric actuatorAcoustic noiseAcoustic noise measurementAcoustic variables controlAcousticsActuatorsDampingFrequency responsePiezoelectricityActive damping controlsBending stiffnessCompensation schemeElectrical inputsLower frequenciesMoving componentsReactive components
TNO Identifier
787723
Publisher
Institute of Noise Control Engineering
Source title
46th International Congress and Exposition on Noise Control Engineering: Taming Noise and Moving Quiet, INTER-NOISE 2017. 27 August 2017 through 30 August 2017
Files
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