New energy vehicle, active noise reduction method and system thereof

Abstract

The invention discloses a new energy vehicle, an active noise reduction method and system thereof. The active noise reduction method of the new energy vehicle includes the following steps that: the operating parameters of the new energy vehicle are acquired, and the frequency of in-vehicle environmental noise signals associated with the operating parameters are obtained according to the operatingparameters, wherein the operating parameters comprise at least the motor rotation speed of the new energy vehicle, wherein the motor rotation speed is in a corresponding relation with the frequency ofthe in-vehicle environmental noise signals; based on the frequency of the in-vehicle environmental noise signals, a preset structural sound database is called to obtain structural sound signals corresponding to the in-vehicle environmental noise signals; and a sound playing module disposed on the new energy vehicle outputs the structural sound signals, and the structural sound signals and in-vehicle environmental noise signals are fused, so that noise reduction processing can be performed on an in-vehicle environment. The active noise reduction method is easy to implement, simple to operate,and is convenient for a user to use.

Description

technical field [0001] The invention relates to the technical field of noise control, in particular to an active noise reduction method for a new energy vehicle, an active noise reduction system for a new energy vehicle and a new energy vehicle. Background technique [0002] The sound quality problem has become a new NVH (Noise Vibration and Harshness) problem in the automotive industry, especially for new energy vehicles, the sound quality problem is more important, because without the masking of the engine sound, the noise of the motor is more Prominent, and the sound signal of the motor is generally sharp, which will bring great trouble to the user. [0003] At present, the noise reduction methods in the automotive field mainly include: (1) Physical noise reduction, which refers to the use of some traditional materials with sound insulation, sound absorption, and damping characteristics to isolate, absorb, and wrap noise and noise sources to achieve noise reduction. Purp...

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Problems solved by technology

[0004] However, although physical noise reduction technology can achieve a certain noise reduction effect, physical noise reduction can only be used to a limited extent due to the constraints of interior space, special-shaped structures, and heat dissipation indicators. Especially for motor noise, it cannot be done too much on the motor side Packaging processing; ANC technology has a certain elimination effect on low-frequency signals, but is ineffective on high-frequency signals; one problem with the masking effect is the sound pressure level of the masking sound signal. When the masking sound signal can mask the high-frequency motor signal , its sound pressure level is much higher than the natural sound pressure level of the original environment

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