This work was focused on the implementation of an active noise control strategy for an acoustic-structural coupled enclosure using structural-based virtual sensors. A virtual sensing system was developed to estimate the broadband sound pressure at virtual interior locations in the enclosure based on structural vibration measurement of its flexible structure, instead of using acoustic sensors. E...

Timing belt transmission is a key subsystem of international combustion engines. Faults in such belt systems lead to power loss, increased emissions and, in case of failure, may even cause severe damage to the whole engine. Hitherto, the physical condition of the belt has been assessed manually, which is both inconvenient and inaccurate. It is well known that driving belts emit noise according ...

Global active noise control has been obtained on the tonal noise from a small centrifugal blower, similar to those used in laptop computers. Compact control systems were investigated for two configurations. The blower was mounted in both a short rectangular duct and in a mock laptop case that was modeled as a two-dimensional rectangular enclosure. Secondary sources and error sensors were locate...

Department of Mechanical Engineering, The Hong Kong Polytechnic University Hung Home, Kowloon, Hong Kong, SAR of China Email address: [email protected]. Abstract This paper examines the influence of the internal resistance of a Helmholtz resonator on the noise control in a small enclosure. The absorptive process mainly occurring within the neck of a Helmholtz resonator provides the resonator w...

In this paper, a deterministic time-domain algorithm for multichannel blind deconvolution is presented. The proposed algorithm assumes that a source signal is measured by several sensors after propagating through finite impulse response channels and being corrupted by additive noise. An estimate of the source signal is obtained by first estimating the channel impulse responses in a Least Square...

This paper presents an H, estimation approach to active control of acoustic noise inside an enclosure. It is shown how Hfilter theory and algorithm can be effectively applied to active noise control to provide important robustness property. Real-time implementation of the algorithm is performed on Digital Signal Processor. Experimental comparison to conventional FxLMS algorithm for active noise...

This paper presents an H∞ estimation approach to active control of acoustic noise inside an enclosure. It is shown how H∞ filter theory and algorithm can be effectively applied to active noise control to provide important robustness property. Real-time implementation of the algorithm is performed on Digital Signal Processor. Experimental comparison to conventional FxLMS algorithm for active noi...