Transfer Characteristic Research of Power Assisted Steering Pump Noise

Abstract:

The characteristics of hybrid electric vehicles’ noise and vibration are different when compared with traditional vehicles, especially in idle condition. Taking the noise level of driver location as reference, this paper investigates the influence of noise of power assisted steering pump equipped in a HEV under idle condition, and figure out how it transfers into cavity using spectrum analysis, vibrational energy transfer analysis, and FRF (frequency response function) analysis etc. It is proved that air-borne noise rather than structure-borne noise is the main source. Test verification is consistent with the analysis result, and appropriate acoustic treatment can be effective in improving the noise level inside the vehicle in idle condition.

• Periodical: Key Engineering Materials (Volumes 439-440)
• Pages: 384-389
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.439-440.384
• Online since: June 2010
• Authors: Er Bing Wang, Hong Zhou, Ying Zhen Liang
• Keywords: Acoustic-Vibration Test, Hybrid Vehicle, Power Assisted Steering Pump Noise, Signal Processing

References

[1] Pang Jian, Chen Gang, He hua, Automotive Noise and Vibration, Beijing Institute of Technology Press, (2006).

[2] Jin Xiaoxiong, Hu Zigu, Engineering Machinery Noise Controlling, Tongji University Press, (1997).

[3] Theory and Background LMS 2000 Fig. 10. Comparison of pump near field acoustic level in 1/3 octave Fig. 9. Comparison of driver acoustic level in 1/3 octave.