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The Study of Active Noise Control System in Duct Based on TMS320VC5509A

Author: YueShaSha
Tutor: ZhaoHongLiang
School: Shandong University of Science and Technology
Course: Signal and Information Processing
Keywords: TMS32OVC55O9A Pipeline Active noise control FXLMS Secondary acoustic feedback
CLC: TB535
Type: Master's thesis
Year: 2010
Downloads: 83
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Abstract


With the increase of large industrial equipment , noise pollution is widespread concern worldwide environmental problems , a lot of inconvenience to the people's production and daily life . Active noise control (ANC) has a good noise control performance for low-frequency noise , which is difficult to achieve using traditional passive noise reduction method . Active noise control is an interdisciplinary research field of system the existence of the adverse effects of the complexity and instability of acoustic feedback problem is a major factor to affect system performance , such as do not take effective measures , acoustic feedback inevitable. In this paper, the pipeline active noise control , the establishment of a system model , introduced the secondary channel model , as well as the identification of the secondary path to study FXLMS algorithm , discussed the problem of the ubiquitous acoustic feedback in the active control system as well as to solve this problem in the algorithm. Simulink simulation based on MATLAB platform , the comparative analysis of different filter order and convergence step algorithm performance , and compare the convergence rate and steady-state error of the filter under different conditions , analysis of the impact of the main parameters of the algorithm performance and to improve the performance of the algorithm . Experimental studies in theory and simulation studies based on the actual the pipeline active noise control system , the master chip using TI's high-performance fixed-point DSP processor TMS320VC5509A software design using C language and assembly language programming mixed method achieve a feedforward control algorithm in the adaptive pipeline , and algorithm experimental Study excitation noise were taken single frequency , multi-frequency superposition , band-limited white noise signal and the sweep signal , for a single-frequency acoustic noise reduction of up to 45dB for significant noise reduction effect of white noise in the range of 80Hz-500Hz .

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CLC: > Industrial Technology > General industrial technology > Acoustic engineering > Vibration, noise and its control > Vibration and noise control and its use
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