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Automotive Engineering ›› 2020, Vol. 42 ›› Issue (10): 1412-1419.doi: 10.19562/j.chinasae.qcgc.2020.10.016

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Engine Sound Partition Control in Passenger Car Based on Multi-channel Command-FxLMS Algorithm

He Yansong1, Zhang Shiqiang1, Zhang Zhifei1, Zhou Tao2   

  1. 1. School of Automotive Engineering, Chongqing University, Chongqing 400030;
    2. Chongqing Acoutec Technology Co., Ltd., Chongqing 400000
  • Received:2019-12-03 Revised:2020-01-30 Online:2020-10-25 Published:2020-10-26

Abstract: The driver and passenger have different requirements on the engine sound when the car is running. The driver needs a certain feedback of the vehicle driving conditions while the passenger needs a relatively quiet environment for rest. In this paper, on the basis of multi-channel Command-FxLMS algorithm, the active control of engine sound partition is realized by setting up different orders of target sound at the driver’s headrest position and other passenger’s headrest positions. Based on the DSP hardware platform, the real vehicle test is carried out for the 2nd and 3rd orders engine noise in the passenger car, and the sound partition control is realized at the driver’s position and the passenger’s position. At the driver’s position, the second order noise is eliminated and the third order noise is raised to the target sound pressure level, while at other positions, the second order noise is reduced and the third order noise is maintained at the low level. The experiment results show that the active control system of engine sound partition works well

Key words: active noise control, Command-FxLMS, sound partition, engine noise