电动汽车低速提示音系统的法规适应性研究

Research on Regulation Adaptation for Acoustic Vehicle Alerting System in Electric Vehicles

本文首先阐述了国家标准规定的电动汽车低速提示音调试方法和过程,并重点论述了低速提示音频谱能量分布对车外噪声最低限值和车内声音品质的影响,提出了一种低速提示音声品质评价方法。测试评价结果表明,通过改进低速提示音在车速变化过程中频谱能量的分布,实现了法规最低限值和车内声品质的兼顾,能更全面地考察低速提示音对整车NVH性能的影响。

In this paper,the tuning method and process of acoustic vehicle alerting system(AVAS)specified in national standard for electric vehicle running at low speed are expounded with the effects of the frequency spectrum energy distribution in AVAS on the lowest limit of exterior noise and interior sound quality emphatically discussed,and a sound quality evaluation method for AVAS is proposed.The results of test and evaluation show that by improving the frequency spectrum distribution of AVAS in the process of speed variation,the balance between the lowest noise limit specified in regulation and internal sound quality is achieved,enabling more all-roundly investigation into the effects of AVAS on the NVH performance of vehicle.