Noise reduction method and noise reduction system for engine characteristic parameters

A technology of characteristic parameters and engines, applied in the field of vehicle engineering, which can solve the problems of inaccurate data analysis results, wrong guidance, deviations, etc.

Active Publication Date: 2019-09-27
WEICHAI POWER CO LTD
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Problems solved by technology

[0003] However, due to the unstable factors in the working state of the sensor and the data transmission process, there is a certain amount of noise in the engine characteristic parameters obtained by the controller of the motor vehicle. When using such characteristic parameters with uncertain noise for data analysis, it is easy to Lead to inaccurate data analysis results, or even completely deviate from reality to bring wrong guidance

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  • Noise reduction method and noise reduction system for engine characteristic parameters

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Embodiment Construction

[0071] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0072] The embodiment of the present application provides a noise reduction method for engine characteristic parameters, such as figure 1 shown, including:

[0073] S101: Obtain a time series of engine characteristic parameters;

[0074] S102: Decompose the time series by using the empirical mode decomposition method to obtain the eigenmode component and the trend component of the engine characteristic parameters;

[0075] Empirical Mode Decomposition (EMD) is an adaptive signal d...

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Abstract

The invention discloses a noise reduction method and a noise reduction system for engine characteristic parameters. The noise reduction method for the characteristic parameters of the engine comprises the following steps: firstly, decomposing a time sequence by utilizing an empirical mode decomposition (EMD) method to obtain an intrinsic mode component and a trend component of the characteristic parameters of the engine; then respectively resampling the intrinsic mode component and the trend component to discretize the intrinsic mode component and the trend component; and finally, carrying out data reconstruction on the intrinsic mode matrix and the trend component matrix obtained after discretization so as to remove correlation between time domain data variables and remove information redundancy between engine characteristic parameters, so that denoising and reconstruction of the characteristic parameters are completed. In addition, the noise reduction method for the engine characteristic parameters is particularly suitable for processing the situation that the signal-to-noise ratio of the engine characteristic parameters such as a heavy diesel engine is large.

Description

technical field [0001] The present application relates to the technical field of vehicle engineering, and more specifically, to a noise reduction method and a noise reduction system for characteristic parameters of an engine. Background technique [0002] Engine performance parameters (or characteristic parameters) are a set of multi-source discrete time series data during use. During the operation of the motor vehicle, the engine characteristic parameters are detected by sensors and transmitted to the controller of the motor vehicle, so that the controller can perform data analysis based on the acquired engine characteristic parameters to guide the normal operation of the motor vehicle. [0003] However, due to the unstable factors in the working state of the sensor and the data transmission process, there is a certain amount of noise in the engine characteristic parameters obtained by the controller of the motor vehicle. When using such characteristic parameters with uncer...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
CPCG06F2218/06
Inventor 宋业栋张振京王洋伦智梅
Owner WEICHAI POWER CO LTD
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