Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Flying wing glider airfoil resistance coefficient grey estimation method

A technology of drag coefficient and gray estimation, applied in design optimization/simulation, special data processing applications, geometric CAD, etc., can solve problems such as time-consuming solution, and achieve improved prediction accuracy, fitting accuracy and prediction accuracy, and high accuracy. The effect of fitting accuracy

Pending Publication Date: 2022-04-22
NORTHWESTERN POLYTECHNICAL UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem that a large amount of solution time is required in the fluid simulation link of the existing underwater vehicle, the present invention provides a gray estimation method for the airfoil drag coefficient of a flying wing glider

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Flying wing glider airfoil resistance coefficient grey estimation method
  • Flying wing glider airfoil resistance coefficient grey estimation method
  • Flying wing glider airfoil resistance coefficient grey estimation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0058]In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0059] A kind of flying wing glider airfoil drag coefficient gray estimation method proposed by the present invention comprises the following steps:

[0060] Step 1: Preprocess the known data sequence based on the enhanced buffer operator, let X=(x(1),x(2),...,x(n)) be the system behavior data sequence, and D be the The operator of X, the sequence obtained by X through the action of operator D is recorded as...

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

No PUM Login to View More

Abstract

The invention relates to a flying wing glider airfoil resistance coefficient grey estimation method, and belongs to the technical field of underwater vehicle research. The method aims at solving the problem that a large amount of solving time needs to be consumed in an existing underwater vehicle fluid simulation link, and reference is provided for accurate prediction of unsolved parameters through a mathematical model. The method takes a gray GM (2, 1) model as a core, and comprises the following steps of: firstly, preprocessing a known data sequence by utilizing an enhanced buffer operator; then, establishing an objective function related to a gray model background value, and performing optimization in combination with a genetic algorithm; and finally, predicting an unsolved resistance coefficient. A calculation result shows that the designed model has very high fitting precision, and the prediction precision of the resistance coefficient is remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of underwater vehicle research, and in particular relates to a gray estimation method for airfoil drag coefficient of a flying wing glider. Background technique [0002] With the continuous development of economic globalization, fierce market competition has prompted countries and enterprises to improve product quality and shorten the design cycle. The industry mainly adopts the method of simulation analysis to optimize the design of products, and this method has been widely used in the fields of aviation, aerospace and navigation. Nowadays, the process of industrial product design usually involves multi-objective and multi-disciplinary collaboration, so when optimizing the problem, it is necessary to call a large number of simulation models. Although the computing power of the computer continues to improve, the model is becoming more and more complex during the simulation analysis process, and the converge...

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
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/15G06F30/27
CPCG06F30/15G06F30/27
Inventor 梁庆卫黄汉成宋保维潘光严卫生刘明雍胡欲立
Owner NORTHWESTERN POLYTECHNICAL UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com