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基于相关性分析的发动机台架声品质评价模型研究

2022-04-11靖海宏杨国芳张旎李东升张建东

汽车科技 2022年2期

靖海宏 杨国芳 张旎 李东升 张建东

摘  要:本文以某四缸轻型柴油发动机为研究对象,结合声学测试标准ISO3744及心理声学参数测试标准(ISO532等),基于噪声声品质台架试验,以心理声学参量响度、尖锐度、粗糙度、抖动度和音调度作为初级客观评价指标,利用Head Acoustics人工头测试设备,提出了一种轻型柴油发动机声品质评价的综合模型。通过发动机标定手段对燃油喷射相关参数调整从而对发动机声品质主要声学参量进行进一步优化后,根据该综合模型结论作优化前后声品质主观评价和客观测量对比,验证了该声品质评价综合模型的合理性和有效性,同时该模型对其他相关动力总成产品声品质评价也可作相关借鉴。

关键词:声品质;辐射噪声;综合模型;主观评价;客观测量;偏好性

中图分类号:U467.2+1      文献标识码:A      文章编号:1005-2550(2022)02-0018-11

Comprehensive Model Studies of Sound Quality Evaluation of an Engine Based on Bench Testing

JING Hai-hong, YANG Guo-fang, Zhang Ni, LI Dong-sheng, ZHANG Jian-dong

( DongFeng Motor Corp. Technical Center, Wuhan 430058, China )

Abstract: A four cylinder diesel engine was chosen as the research object on this paper, combined with acoustic testing standard ISO3744 and psychoacoustic testing standard ISO532 with different psychoacoustic parameters such as loudness, sharpness, roughness, fluctuation and tonality etc. as the primary objective evaluation index, proposes a comprehensive model of light diesel engines sound quality evaluation based on the Head Acoustics artificial ears test equipment in the semi-anechoic chamber, the primary acoustical parameters of sound quality was taken further optimized by calibration technical approaches of the engine for comparison after and before, according to the comprehensive model with subjective evaluation and objective measurement contrast, it validate and shows the rationality and validity of the integrated model of engines sound quality evaluation, and it also provides profits and references of sound quality evaluation to other kinds of powertrain products.

Key Words: Sound Quality; Radiated Noise; Comprehensive Model; Subjective Evaluation; Objective Measurement; Preference

1   前言

发动机辐射噪声已成为环境污染噪声的重要组成部分,开展发动机噪声品质的预测与评估研究具有重要的理论与实际意义,随着汽车技术的发展和测试手段的更新,以单一声压级为指标的参数控制已不能完全评价发动机声学性能的好壞,除了声压级大小,客户对车辆的声学特性描述还有响度、尖锐度、粗糙度、抖动度和音调度等心理声学参量的描述和感受,也是发动机声学开发过程中的重要环节。声品质反映了人对噪声的主观感受,研究及改善发动机噪声声品质对提高汽车乘坐舒适性也具有及其重要的意义。……

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