Dynamic load spectrum compilation method based on time domain extrapolation technology

A dynamic load and load technology, applied in instruments, character and pattern recognition, computer parts, etc., can solve problems such as inapplicability of non-stationary loads, strong subjective factors in threshold selection, and low reconstruction accuracy of extreme value loads. Conducive to automation, avoiding errors, and improving the efficiency of compilation
CN113095192APending Publication Date: 2021-07-09CHINA AGRI UNIV
0 Cites 1 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHINA AGRI UNIV
Publication Date
2021-07-09

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to a dynamic load spectrum compilation method based on a time domain extrapolation technology, and the method comprises the following steps: 1, processing an actually measured load time domain signal through employing a load time domain decomposition method of empirical mode decomposition, and obtaining a principal component load and a trend load; step 2, calculating an upper and lower limit optimal threshold value based on a threshold value screening method, and obtaining a fitting distribution function consistent with extreme value sample distribution exceeding the threshold value; 3, extrapolating and reconstructing the extreme value sample exceeding the threshold value on the basis of the step 2 to obtain a complete extrapolation load; and 4, compiling a dynamic load spectrum based on an improved time domain extrapolation method. According to the method, more accurate load input can be provided for simulation analysis and reliability tests in the field of mechanical engineering, and the precision of load spectrum compilation is further improved.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The present invention relates to a method applied to the preparation process of load spectrum, more specifically, the present invention relates to a dynamic load spectrum preparation method based on time domain extrapolation technology. Background technique

[0002] In the early stage of product development, it is extremely difficult to obtain the load information of the machine during the life cycle through the real vehicle test under all working conditions, which requires huge manpower, material resources and time costs. Therefore, R&D personnel are more inclined to obtain more complete load information by obtaining basic load data of the machine under various working conditions through short-term tests, that is, load extrapolation technology. As an important link in the process of load spectrum compilation, load extrapolation can provide continuous and accurate load information for load spectrum compilation based on limited tests, effectively reduce...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More