Application of an Memetic Algorithm to Placement of Sensors for Active Noise-Vibration Control

Wrona, Stanisław; Pawełczyk, Marek

doi:10.7494/mech.2013.32.3.122

Cited by 6 publications

(3 citation statements)

References 12 publications

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“…The placement of actuator/sensor pairs was the same for each wall, and it was a result of maximization of the minimal eigenvalue of the controllability Gramian matrix for the first 6 plate modes (33 Hz to 150 Hz) [10]. A Kirchhoff plate model with exciters modeled as a mass connected with a spring was useda for that purpose [11]. The influence of accelerometer mass was ignored.…”

Section: Laboratory Setupmentioning

confidence: 99%

Virtual Microphone Control for an Active Noise-Cancelling Casing

Mazur

Pawełczyk

2016

SSP

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An active noise-canceling casing is very attractive for reduction of sound generated bydevices. Such casing can provide good noise reduction for low frequencies, where a passive barrierwould be too thick for practical use. The classical active noise control approach, where the goal is tominimize the sound pressure level around multiple microphones outside the casing can be used. However,it requires placing external microphones, what makes the overall technical solution not acceptedfor many applications. The active vibration control, where the goal is to minimize vibrations of allplates, requires only sensors on the plates. However, in this solution, in turn, noise reduction resultsare worse. This paper presents employment of the idea of the virtual microphone-based approach toimprove results from the system based on vibration sensors only, which are used to estimate acousticpressure at specific locations in the acoustic field. By using a two-stage structure, the system is tunedto reconstruct the same vibrations of the plates, which were present when the acoustic pressure wereminimized directly in the square sense. A laboratory active noise-canceling casing used for experimentsis made of 5 actively controlled aluminum plates mounted on a steel frame. It is passivelyisolated from the floor. On each plate, three electrodynamical actuators are installed. The controlsystem is experimentally verified and obtained results are reported.

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Section: Laboratory Setupmentioning

confidence: 99%

Virtual Microphone Control for an Active Noise-Cancelling Casing

Mazur

Pawełczyk

2016

SSP

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“…The impact of the mass of the actuators is included in the optimization procedure. The method is described in details in previous publications of the authors [14,15].…”

Section: The Laboratory Setupmentioning

confidence: 99%

“…In case of single-panels the accelerometers are collocated with the actuators. For double panels, they are mounted on the radiating plate at locations calculated according to the method that maximizes a measure of the observability of the system [16]. The placement of actuators and sensors is identical for each panel.…”

Section: The Laboratory Setupmentioning

confidence: 99%

Employment of Double-Panel Casing for Active Reduction of Device Noise

Wrona

Pawełczyk

2016

SSP

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The idea of active casing is an approach to reduce device and machinery noise by controlling vibration of casing walls. The sound insulation efficiency of this technique for a single-plate casing was confirmed by the authors in previous publications. However, under specific circumstances, a dedicated double-panel structure can yield even higher noise reduction. The aim of this paper is to propose and evaluate by means of laboratory experiments the performance of a double-panel casing in comparison with a single-panel casing. An adaptive control strategy based on the Least Mean Square (LMS) algorithm is used to update control filter parameters. A low-frequency noise in the range up to 250 Hz is considered. Obtained results are reported, discussed, and conclusions for future research are drawn.

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