Automobile active noise reduction system and method

Abstract

The invention discloses an automobile active noise reduction system and method. The automobile active noise reduction method comprises error microphones, a rotating speed acquisition device and a noise reduction controller. The error microphones are connected with the noise reduction controller and are used for collecting noise signals and outputting the noise signals to the noise reduction controller. The rotate speed acquisition device and the noise reduction controller are used for acquiring rotating speed signals of an engine and outputting the rotating speed signals to the noise reductioncontroller. The noise reduction controller is used for performing active noise reduction simulation according to the noise signals, the rotating speed signals of the engine, reference noise data of acorresponding vehicle type and an established transfer function, optimal control parameters are determined, and active noise reduction is performed based on the optimal control parameters. The automobile active noise reduction system and method can control the order noise of the engine, and can freely adjust a control area in a vehicle according to the number and position of installed error microphones. The automobile active noise reduction system and method can be conveniently and quickly additionally installed into the vehicle needing active noise reduction, the cost is low, the operation is simple, and drivers and passengers can obtain better driving experience.

Description

technical field [0001] The invention relates to the field of active noise control, in particular to an automobile active noise reduction system and method. Background technique [0002] At present, more and more mid-to-high-end cars are equipped with active noise reduction technology, such as the mid-to-high configuration of the 2018 Buick LaCrosse, the entire Cadillac XTS, the Honda Accord, and the 2019 Nissan Teana. These newly-launched cars are equipped with active noise reduction technology, which shows that active noise reduction technology is becoming more and more popular in cars. However, the price of cars equipped with active noise reduction technology on the market is basically more than 200,000 yuan, and most of the cars below 200,000 yuan are not equipped with active noise reduction technology. And cars with lower prices tend to have higher interior noise levels than cars with higher prices. [0003] With the improvement of people's living standards, consumers ...

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Problems solved by technology

[0003] With the improvement of people's living standards, consumers pay more and more attention to the noise inside the car. Some car refitting factories can add sound-absorbing cotton or damping in the car to achieve the purpose of noise reduction, but the project is cumbersome, time-consuming, and expensive. high

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