基于粗糙度和调制分析的电机粗糙感排查与修改预测  

Detection and Modification Prediction of Motor Roughness Based on Roughness and Modulation Analysis

作　　者：毛阳 李永焯 禹丹江 MAO Yang;LI Yongzhuo;YU Danjiang(HEAD acoustics China Company Limited,Shanghai 200120,China)

机构地区：[1]海德声学(上海)科技有限公司,上海200120

出　　处：《汽车实用技术》2024年第7期125-129,共5页Automobile Applied Technology

摘　　要：针对电机在升速过程中听感上出现的粗糙感问题,首先从心理声学参数的客观计算出发,引入了基于Sottek听觉模型的粗糙度算法,实现心理声学参数计算指标与人耳粗糙度主观感知的映射。进而通过特征粗糙度分析、调制谱分析、傅里叶频谱分析等,细致地排查出电机出现粗糙感工况的具体调制频率和参与调制的阶次。最后通过声音虚拟修改和回放技术,对电机潜在的问题阶次进行虚拟修改并回放,实现潜在方案真实改进前的改进效果直观评估,从而缩短改进周期,降低改进风险。Targeted at the issue of roughness in the auditory perception during motor acceleration,firstly a roughness algorithm based on Sottek auditory model is introduced from the objective calculation of psychoacoustic parameters to realize the mapping between the calculation index of psychoacoustic parameters and the subjective perception of human ear roughness.Furthermore,the modulation frequency and order which cause roughness perception of motor is careful investigated through specific roughness analysis,modulation spectrum analysis and Fourier spectrum analysis.Finally,through virtual modification and playback technology of sound,the potential problem order of the motor is virtual modified and playback,and the improvement effect is visually evaluated before the real improvement of the potential scheme,thus shortening the improvement cycle and reducing the improvement risk.

关 键 词：电机 心理声学 听觉模型 粗糙度 调制分析 

分 类 号：U467.1[机械工程—车辆工程]