Characteristic load identification and acceleration test load spectrum compilation method
An acceleration test and load recognition technology, which is applied in character and pattern recognition, vehicle testing, machine/structural component testing, etc., can solve the problems of different dynamic stress of parts, no time-frequency characteristic recognition, etc. Efficiency, shortening the effect of accelerated fatigue test cycle
Active Publication Date: 2021-03-23
SHANGHAI DIANJI UNIV
View PDF3 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The existing methods do not identify the load according to the time-frequency characteristics, and the different frequencies will lead to different dynamic stresses of the parts, ignoring its influence will cause certain errors in the identification and identification of invalid loads
Method used
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
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0042] The implementation of the present invention will be illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention will be presented in conjunction with a preferred embodiment, it does not mean that the features of the invention are limited to this embodiment. On the contrary, the purpose of introducing the invention in conjunction with the embodiments is to cover other options or modifications that may be extended based on the claims of the present invention. The following description contains numerous specific details in order to provide a thorough understanding of the present invention. The invention may also be practiced without these details. Also, some specific details will be omitted from the description in order to avoid obscuring or obscuring the gist of the present invent...
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 PUM
Login to View More Abstract
The invention discloses a characteristic load identification and acceleration test load spectrum compilation method which is characterized by comprising the following steps of: (1) inputting an original load spectrum; (2) acquiring the statistical parameters of the original load spectrum; (3) performing power spectral density analysis on the original load spectrum to obtain frequency domain characteristics of a signal; (4) carrying out j-layer wavelet decomposition on the load spectrum signal; (5) reconstructing wavelet coefficients according to load frequency band characteristics, and grouping wavelet components; (6) determining a relative load threshold of each group; (7) identifying the part with the amplitude higher than the threshold in the signal, and positioning the time period; (8)forming and splicing load spectrum signal segments; and (9) comparing the acceleration test load spectrum with the original load spectrum, and if the key statistical parameters are greatly changed, carrying out identification and extraction again after the relative threshold is determined again until the key statistical parameters meet the requirements, thereby finishing the compiling work.
Description
Technical field: [0001] The invention relates to the technical field of automobiles, in particular to a characteristic load identification and acceleration test load spectrum compilation method. Background technique: [0002] Automobiles are an indispensable means of transportation for modern human work and life. With the continuous lightweighting of traditional automobiles and the continuous increase in the load of new energy vehicles, the stress on automotive structural parts is increasing. How to correctly predict its fatigue life has become an important issue for automobiles One of the key tasks of anti-fatigue design. [0003] In this regard, due to the complexity of the vehicle structure and working conditions, there have always been relatively large technical difficulties. Among them, in the anti-fatigue design of automobiles, the preparation of the accelerated fatigue test load spectrum plays a vital role in judging the accuracy of the fatigue life of the estimated ...
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 Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01M17/007G06K9/00
CPCG01M17/007G06F2218/06G06F2218/08Y02T90/00
Inventor 沈永峰张杰陈庆东沈宇涛
Owner SHANGHAI DIANJI UNIV