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With the widespread popularity of new energy vehicle models, electrical compressor operation noise is one of the main sources of electric vehicle noise. In order to analyze the mechanism of noise generation and clarify the noise characteristics and main transmission paths, this paper focuses on the study of order noise in electric compressor noise, and summarize the identification and optimization control methods of electric compressor noise based on the sources-path-response analysis model combined with engineering development examples. The research results indicate that: compared to traditional methods such as suppressing the compressor’s vibration force level and optimizing the vibration isolation capability of the transmission path, adopting a speed avoidance control strategy for the electric compressor to control the first-order booming noise is more cost-effective; optimizing and controlling the vibration isolation capability of the mounting brackets for the compressor and cooling fan are key to reducing the perceived amplitude of beat frequency noise inside the vehicle; based on the principle of auditory masking, the acceptance threshold for electromagnetic noise of the electric compressor can be increased by reasonably amplifying the noise of the cooling fan.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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