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Indoor active noise control method and system for armored car cabin

An active control, armored vehicle technology, applied in active noise control, sounding equipment, instruments, etc., can solve problems such as poor control of medium and low frequency noise, and achieve the effect of solving time lag, ensuring accuracy, and improving noise reduction effect.

Inactive Publication Date: 2017-10-10
邢优胜
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In conventional armored vehicles, passive noise control in the cabin is carried out by arranging damping and sound-absorbing materials in the cab and passenger compartment, enhancing the sound-absorbing and sound-insulating performance of the floor inside the car, adding engine sound-proof covers, and other physical noise-reduction measures. The measures have better isolation effect on high-frequency noise, but poor control effect on medium and low-frequency noise

Method used

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  • Indoor active noise control method and system for armored car cabin
  • Indoor active noise control method and system for armored car cabin
  • Indoor active noise control method and system for armored car cabin

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Embodiment 1

[0029] This embodiment provides an active control method for noise in the cabin of an armored vehicle. see figure 1 Shown is a specific embodiment of the active control method for noise in the cabin of an armored vehicle in the present application, and the steps in this embodiment include:

[0030] Step S1-1: The reference microphone collects noise x[n] of multiple main noise sources, and inputs it as a reference signal;

[0031] Step S1-2: The error microphone collects the residual noise e[n] after noise control, and inputs it as an error signal;

[0032] Step S2: The fuzzy controller receives the reference input signal x[n]=x[n], the error input signal e[n], based on the fuzzy neural network adaptive filter RBF (Filter-x Radial Basis Function, hereinafter referred to as FX-RBF ) net training algorithm analyzes the reference signal and the error signal, and outputs an inverted target sound signal y[n] to the loudspeaker; and

[0033] Step S3: The loudspeaker emits the targ...

Embodiment 2

[0052] In order to make the description of the present invention clearer and more detailed, and to facilitate technical personnel to understand, the present embodiment provides an active noise control system in the cabin of an armored vehicle, see Figure 5 Shown is a specific schematic diagram of the active noise control system in the cabin of the armored vehicle of the present application.

[0053] An active control system for noise in the cabin of an armored vehicle, comprising:

[0054] The reference microphone is coupled with the fuzzy controller and is used to collect noise x[n] of multiple main noise sources as a reference signal input;

[0055] The error microphone, coupled with the fuzzy controller, is used to collect the residual noise e[n] after noise control, and input it as an error signal;

[0056] Fuzzy controller, coupled with reference microphone, speed sensor, error microphone and loudspeaker, used to receive reference input signal x[n]=x[n], error input sig...

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Abstract

The invention discloses an indoor active noise control method and system for an armored car cabin. The method comprises the steps that a reference microphone collects main noise source noise as reference signal input; an error microphone collects residual noise after noise control as error signal input; and a fuzzy controller receives a reference input signal and an error input signal, analyzes a reference signal and an error signal by adopting a fuzzy neural network-based adaptive FX-RBF network training algorithm, outputs inverted target sound signal y[n] to a loudspeaker and superposes the inverted target sound signal and main noise source noise x[n]. Through fuzzy neural network-based active noise control, the indoor active noise control method has an obvious noise reduction effect on the noise below 2,000Hz, wherein the noise reduction effect on low-frequency noise below 1,000Hz is particularly significant.

Description

technical field [0001] The invention relates to noise control technology in the field of ships and warships, in particular to an active control method and system for noise in an armored vehicle cabin. Background technique [0002] The interior noise of the armored vehicle cab and crew compartment exceeds the standard, which seriously affects the physical and mental health of the relevant personnel. The design of vibration and noise reduction in the cabin is a relatively important task. The main noise sources in the armored car cabin mainly include: when the vehicle is running at high speed, the air turbulence causes the body structure to vibrate, which generates high-frequency noise in the car; Radiation of medium-frequency noise; vibration of the suspension system when the road surface is uneven causes vibration of the vehicle body structure, resulting in low-frequency noise in the car. [0003] In conventional armored vehicles, passive noise control in the cabin is carrie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/178
CPCG10K11/178G10K2210/128G10K2210/3038
Inventor 邢优胜
Owner 邢优胜
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