差分相位调制指令-FxLMS算法驱动的多阶次噪声调制

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关键词：主动声音分析；参考滤波最小均方；差分相位调制；多阶次噪声；稳态仿真 中图分类号：TB535；TP273.2 文献标志码：A DOI：10.16385/j.cnki.issn.1004-4523.202311058

Multi-order noise modulation driven by a differential phase scheduled command-FxLMS algorithm

LI Rubin，ZHENGXu1，JIA Zibin 2 ，LIUXuexian1 （1.College of Energy Engineering，ZhejiangUniversity，Hangzhou 3loo27，China; 2.Zhejiang Setron Technology Co.，Ltd.，Hangzhou 311l99，China）

Abstract：Thecommand-FxLMSalgorithm formultiordernoise modulationhasunnecessrilyhighoutput gain whenthere isa phase error betwen thecommand signalandthe disturbance signal.Aimingatthis problem，a multiorderactivesound profiling system based on the modified differential phase scheduled command filtered- x least mean square（DPSC-FxLMS） algorithm is constructed.Byadjustingthephaseofthecommandsignaltokeepit inphasewiththedisturbancesignal，theoutputlevelof thecon trolsignalisreducedwhilekeepingthesamecontrolperformance.Simulationanalysisandcomparisonofenginesteadystate multiordernoisemodulationusingtheabovealgorithmsarecariedout，andthecontrolefectoftealgorithmsisverifiedForthe in-phasecase，twoalgorithmssharetheidenticalperformanceandcontroleffect，whilefortheout-of-phasecase，the DPSC-FxLMSalgorithmrequires less controlefort thanthecommand-FxLMS toachieve thesamecontrol performance.The multiordernoisemodulationsimulationoftheabovealgoritmiscariedoutusingthemultiordernoisesignalcolectedfromareal vehicle.Thesimulationresultsvalidate thefeasibilityof the proposed algorithm forpracticalin-vehicleapplications.

Keywords：activesoundprofiling;filtered -X least mean square;differential phase schedule;multi-order noise;steady-state simulatior

主动噪声控制（activenoisecontrol，ANC）技术运用控制算法在测点位置处生成与原始噪声幅值相等、频率相同但相位相反的相干声波，该声波与原始噪声相互抵消，可有效降低测点位置处的噪声水平[1-2]。（剩余12304字）