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Based on X-filtered DCT / LMS adaptive inverse algorithm of noise cancellation system


In addition to device about the first 7000 samples in the time when the system reaches a steady state turn. 5 Conclusion for the operation of heavy machinery in the engine and hydraulic pumps that produce strong noise, this destructive interference with each other based on the principle of sound waves, proposed a program to eliminate the driver's ear noise. X a filter based on DCT / LMS algorithm to build adaptive inverse control noise cancellation system, the cab driver to make it sound speaker output transmitted to the cab driver to offset the strong ear noise,radii shoes sale, so as to achieve noise reduction purposes. Simulation results show that the adaptive inverse control system to reduce noise noise reduction of about 20dB, a strong noise environment to improve the mechanical driver working conditions. The noise reduction system in the heavy machinery has good application value. References: [1] WidrowB,######## oakley sunglasses, StearnsSD. Adaptivesigllalprocessing [M]. EnglewoodCli Ju NJ: Prentice-Hall, 1995. [21 Zhou Delian. Li Pu. White-adapted filtering structure based on the vibration sound radiation system of feed-forward control [J]. Coal Mine Machinery. 2004. (10) :43-44. [3] B Weide Luo,ed hardy canada, E Wallace (Liu Shutang. HAN Chong-Zhao translation). White-adapted inverse control [M]. Xi'an: Xi'an Jiaotong University Press. 20OO. [4] Zhao Bin, et al. Inverse control based on white to adapt the aircraft cabin noise cancellation system of [J]. Control Engineering, 2002.9 (6) :84-86. [5] Ma Dayou. Noise control study [M]. Beijing: Science Press. 1987. [6] Liu Zhao. Tao. Lu Yaozu, et al. ZIAI50B loader cab noise test study [J]. Construction machinery. 2001. (6) :11-13. Author: Marcos India (1982 a), Henan Pingyu people. June 2003 graduate of Jiaozuo Institute of Technology. Bachelor degree. Is now in Henan Polytechnic University,herve leger sale, Department of Electrical Engineering postgraduate students. SCM is mainly engaged in the research and intelligence work. Tel :0391-3983874, E-mail: jzitmgy @ hotmail. tom. Received date :2004-10-25TheStudy0nNoiseEliminatingSystembyAdaptiveInvers eControlBased0nX-FilteringandDCr / LMSAlgorithmMAGao-yin, WANGFu-zhong (ElectricalEngineeringSchoolofHenanScienceandE.gin ecrins. Jiaozuo454003,diesel store paris, China) Abstract: AmethodiSprovidedtoeliminatethenoisearounddriver'S earsfromheavyconstructionmachinerySRchasgrabandloa dingmachinerycausedbytheirpowerfulengineandhydraul icpumpbasedonadaptireinversecontro1. AcontrolleriSconstructedfoundedonX-filteringemployingDCT/LMSalgorithmtodrivetheloudhailerinstallednearthedr ivingseat, whoseoutputwavesofthesgnlefrequencyandmagnitudewit hnoisetransmittedtothecabwi11counteracteachother, duetosocalleddestructivedisturbingeffect. bywhichreducingthenoisepartlyaroundthemotorman'sea rs. Keywords: adaptiveinversecontrol: X-filter; DCT / LMSalgorithm: constructionmachinery; noise
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