Adaptive Helmholtz resonators and passive vibration absorbers for cylinder interior noise control

2005 ◽  
Vol 288 (4-5) ◽  
pp. 1105-1130 ◽  
Author(s):  
Simon J. Estève ◽  
Marty E. Johnson
Keyword(s):  
Noise Control ◽  
Interior Noise ◽  
Vibration Absorbers ◽  
Helmholtz Resonators

Vibration Absorbers: A Review of Applications in Interior Noise Control of Propeller Aircraft

2004 ◽  
Vol 10 (8) ◽  
pp. 1221-1237 ◽  
Author(s):  
R. I. Wright ◽  
M. R. F. Kidner
Keyword(s):  
Passive Control ◽  
Noise Control ◽  
Large Body ◽  
Research Area ◽  
Interior Noise ◽  
Vibration Absorbers ◽  
Noise Levels ◽  
Active Systems ◽  
Significant Research ◽  
Fruitful Research

Control of interior noise levels in aircraft has been a significant research area over the last two decades. Vibration absorbers have often been researched as more efficacious solutions to this problem than absorbent blankets or fully active systems. In this paper we review the large body of work performed in this field and we offer an indication of the remaining areas for fruitful research. Surprisingly few installations of vibration absorbers for interior noise control have been realized, and we believe this is due to the pervasive belief in industry that vibration absorbers can only be applied to control resonant, not forced behavior in a structure. The potential of adaptive passive control using vibration absorbers has been shown by many researchers, and we believe that this direction may yield several practical solutions to the problem of interior noise in aircraft.

Active control for vehicle interior noise using the improved iterative variable step-size and variable tap-length LMS algorithms

2019 ◽  
Vol 67 (6) ◽  
pp. 405-414 ◽  
Author(s):  
Ningning Liu ◽  
Yuedong Sun ◽  
Yansong Wang ◽  
Hui Guo ◽  
Bin Gao ◽  
...  
Keyword(s):  
Steady State ◽  
Noise Control ◽  
Convergence Speed ◽  
Interior Noise ◽  
Lms Algorithm ◽  
Variable Step Size ◽  
Step Size ◽  
Vehicle Interior ◽  
Vehicle Interior Noise ◽  
Variable Step

Active noise control (ANC) is used to reduce undesirable noise, particularly at low frequencies. There are many algorithms based on the least mean square (LMS) algorithm, such as the filtered-x LMS (FxLMS) algorithm, which have been widely used for ANC systems. However, the LMS algorithm cannot balance convergence speed and steady-state error due to the fixed step size and tap length. Accordingly, in this article, two improved LMS algorithms, namely, the iterative variable step-size LMS (IVS-LMS) and the variable tap-length LMS (VT-LMS), are proposed for active vehicle interior noise control. The interior noises of a sample vehicle are measured and thereby their frequency characteristics. Results show that the sound energy of noise is concentrated within a low-frequency range below 1000 Hz. The classical LMS, IVS-LMS and VT-LMS algorithms are applied to the measured noise signals. Results further suggest that the IVS-LMS and VT-LMS algorithms can better improve algorithmic performance for convergence speed and steady-state error compared with the classical LMS. The proposed algorithms could potentially be incorporated into other LMS-based algorithms (like the FxLMS) used in ANC systems for improving the ride comfort of a vehicle.

CONTROL OF AIRCRAFT INTERIOR NOISE USING GLOBALLY DETUNED VIBRATION ABSORBERS

1997 ◽  
Vol 203 (5) ◽  
pp. 745-761 ◽  
Author(s):  
C.R. Fuller ◽  
J.P. Maillard ◽  
M. Mercadal ◽  
A.H. von Flotow
Keyword(s):  
Interior Noise ◽  
Vibration Absorbers

Adaptive Active Vehicle Interior Noise Control Algorithm Based on Nonlinear Signal Reconstruction

2020 ◽  
Vol 39 (10) ◽  
pp. 5226-5246
Author(s):  
Xiaolan Wang ◽  
Tongzhou Wang ◽  
Lili Su ◽  
Yansong Wang ◽  
Dongpo Yang ◽  
...  
Keyword(s):  
Control Algorithm ◽  
Noise Control ◽  
Signal Reconstruction ◽  
Interior Noise ◽  
Vehicle Interior ◽  
Vehicle Interior Noise ◽  
Nonlinear Signal
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