Systematic Digitized Treatment of Engineering Line-Diagrams

DOI

10.2991/cisia-15.2015.210How to use a DOI?

Keywords

line graph; data processing; curve fitting; grey models; cubic spline function; artificial neural network

Abstract

In engineering design, there are many functional relationships which are difficult to express into a simple and exact mathematical formula. Instead they are documented within a form of line graphs (or plot charts or curve diagrams) in engineering handbooks or text books. Because the information in such a form cannot be used directly in the modern computer aided design (CAD) process, it is necessary to find a way to numerically represent the information. In this paper, a data processing system for numerical representation of line graphs in mechanical design is developed, which incorporates the process cycle from the initial data acquisition to the final output of required information. As well as containing the capability for curve fitting through Cubic spline and Neural network techniques, the system also adapts a novel methodology for use in this application: Grey Models. Grey theory have been used in various applications, normally involved with time-series data, and have the characteristic of being able to handle sparse data sets and data forecasting. Two case studies were then utilized to investigate the feasibility of Grey models for curve fitting. Furthermore, comparisons with the other two established techniques show that the accuracy was better than the Cubic spline function method, but slightly less accurate than the Neural network method. These results are highly encouraging and future work to fully investigate the capability of Grey theory, as well as exploiting its sparse data handling capabilities is recommended.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - T.Z Sui
AU  - H.S Qi
AU  - Q. Qi
AU  - L. Wang
AU  - J.W Sun
PY  - 2015/06
DA  - 2015/06
TI  - Systematic Digitized Treatment of Engineering Line-Diagrams
BT  - Proceedings of the International Conference on Computer Information Systems and Industrial Applications
PB  - Atlantis Press
SP  - 776
EP  - 779
SN  - 2352-538X
UR  - https://doi.org/10.2991/cisia-15.2015.210
DO  - 10.2991/cisia-15.2015.210
ID  - Sui2015/06
ER  -