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Method for obtaining Bode diagram by processing swept frequency data with MATLAB

A frequency sweeping data and frequency sweeping technology, applied in the field of data processing, can solve the problems of low efficiency and low precision in manual processing of frequency sweeping data, and achieve the effect of easy operation, simple operation and simple drawing.

Active Publication Date: 2019-03-15
YANSHAN UNIV
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method of processing sweeping data with MATLAB to obtain a Bode diagram, and modularize it to solve the problems of low efficiency and accuracy in the manual processing of sweeping data

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  • Method for obtaining Bode diagram by processing swept frequency data with MATLAB
  • Method for obtaining Bode diagram by processing swept frequency data with MATLAB

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Embodiment Construction

[0017] In order to detail the technical content, structural features, achieved goals and effects of the present invention, the following will be described in detail in conjunction with the accompanying drawings.

[0018] such as flow chart figure 1 As shown, the data processing steps can be divided into 6 modules, as follows:

[0019] S1. Data import: Carry out a frequency sweep experiment, and import the experimental data into MATLAB.

[0020] S2. Preliminary screening: compare each data point with m points before and after, and preliminarily determine the peak point and corresponding time value of the frequency sweep data.

[0021] The process of screening peak points can be divided into g segments with a length of 10 Hz according to the frequency of the command signal and carried out sequentially. Screen the command signal and the peak point of the actual signal of the frequency sweep data, select the data points of the command signal and the actual signal in the frequenc...

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Abstract

The invention discloses a method for obtaining Bode diagram by processing swept frequency data with MATLAB, which comprises the following steps: data importing; Preliminary screening; Screening again;Precision screening; Data calculation; Image rendering. The method comprises the following steps: segmenting swept frequency data according to frequency, comparing each data point with m points before and after, obtaining peak points, and removing the peak points whose adjacent time is less than n from the obtained peak points; Pairing the peak points and ensuring that the actual signal in each pair of peak points is hysteresis; The amplitude ratio and phase difference calculated at the same frequency are averaged. Using MATLAB to process swept frequency data and draw Bode diagram, the wholeprocess is fast, accurate, simple and labor-saving. The method is simple, easy to operate, versatile, accurate and reliable, and can be used to process swept frequency data, so that Bode diagram can be obtained more quickly and accurately.

Description

technical field [0001] The invention relates to data processing technology, in particular to a method for processing sweeping data with MATLAB to obtain a Bode diagram. Background technique [0002] From the traditional industry to the aerospace field, it is necessary to evaluate the frequency characteristics of the system, and the Bode diagram is the most intuitive form to reflect the frequency characteristics such as amplitude-frequency characteristics and phase-frequency characteristics, which are generally obtained by processing frequency sweep data. For the process of frequency sweep data processing, the current common method is to manually find the amplitude of each cycle, and then calculate the data such as amplitude ratio and phase difference to draw the Bode diagram. Due to the large amount of frequency sweep data, the data processing process is inefficient and prone to a series of avoidable errors such as inaccurate calculations, which affect the accuracy of the re...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T11/20G06K9/00G06F17/15G01R23/02
CPCG06F17/15G06T11/206G01R23/02G06F2218/10
Inventor 姚静尹钰鑫董兆胜寇成浩田月
Owner YANSHAN UNIV