Electric car active sound generation system and sound control method thereof

Abstract

The invention relates to the technical field of electric car active sound generation, and discloses an electric car active sound generation system and a sound control method thereof. The sound controlmethod of the electric car active sound generation system comprises the following steps of calculating virtual engine rotary speed according to any one of car speed and motor rotary speed; calculating a combined value of corresponding fundamental frequency and harmonic frequency according to the virtual engine rotary speed; and calculating engine order sound according to the combined value. The electric car active sound generation system and the sound control method thereof provided by the invention have the beneficial effects that a virtual engine rotary speed calculation formula based on electric car speed is provided, and the virtual engine rotary speed of the active sound generation system can be calculated according to the car speed or motor rotary speed, so that a sound frequency produced by the active sound generation system is ensured to range from virtual engine idle speed and rated rotary speed, and authenticity and naturality of a sound produced by the electric car active sound generation system are ensured.

Description

technical field [0001] The invention relates to the technical field of active sounding of electric vehicles, in particular to an active sounding system of electric vehicles and a sound control method thereof. Background technique [0002] Electric vehicles cancel the powertrain system of traditional vehicles such as engines, intake and exhaust systems, and add systems such as drive motors and power batteries. The noise inside electric vehicles is mainly motor noise, road noise and wind noise. The characteristics are characterized by high frequency, while road noise and wind noise are characterized by broadband random noise. Electric vehicles have no engine noise. Although the amplitude of the noise in the car can be effectively reduced, because there is no masking effect of the engine noise, the dynamic change of the sound in the car is characterized by the order sound of the motor that changes with the speed of the vehicle. The order of the motor The sound is often dominat...

AI Technical Summary

Problems solved by technology

Under this development trend, the interior sounds of different brands of electric vehicles will tend to be homogeneous, and there will be no recognition of sound quality characteristics. Effective feedback information, the lack of auditory feedback information will make the driver's control of the vehicle's running state not comprehensive enough, and it is likely to have a certain deviation in the judgment of the car's driving state. Therefore, the active voice in the electric vehicle Technology is very necessary. It can actively provide the driver with a feedback sound that can change with the dynamic driving of the vehicle in the car, and it can also play a role in shaping the brand image of the sound in the car when the electric car accelerates.

[0003] Since the engine sound is still one of the important sound design directions of the active sound system of electric vehicles, in the process of designing the engine sound of the active sound system, it is necessary to ensure that the frequency of the generated engine sound conforms to people's cognition of the frequency of the sound produced by the traditional internal combustion engine , if the generated frequency is too high or too low, it will lead to unreal and unnatural sound, which will reduce the sound quality perception of the active sound system

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