[Legacy Report] Verification and Validation of Electromagnetics Software
Speaker: Dr Edward Miller
Distinguished Lecturer, IEEE AP Society
Abstract:
For the past several decades, a computing-resource of exponentially expanding capability now called computational electromagnetics (CEM) has grown into a tool that both complements and relies on measurement and analysis for its development and validation, The growth of CEM is demonstrated by the number of computer models (codes) available and the complexity of problems being solved attesting to its utility and value. Even now, however, relatively few available modeling packages offer the user substantial on-line assistance concerning verification and validation. CEM would be of even greater practical value were the verification and validation of the codes and the results they produce more convenient. Verification means determining that a code conforms to the analytical foundation and numerical implementation on which it is based. Validation means determining the degree to which results produced by the code conform to physical reality. Validation is perhaps the most challenging aspect of code development especially for those intended for general-purpose application where inexperienced users may employ the codes in unpredictable or inappropriate ways. This presentation discusses some of the errors, both numerical and physical, that most commonly occur in modeling, the need for quantitative error measures, and various validation tests that can be used. A procedure or protocol for validating codes both internally and externally is proposed. Ways of comparing different computer models with respect not only to their efficiency and utility, but also to make more relevant intercode comparisons and to thereby provide a basis for code selection by users having particular problems to model, are also discussed. The kinds of information that can be realistically expected from a computer model and how and why the computed results might differ from physical reality are considered.A procedure called “Feature Selective Validation” that has received increasing attention in the Electromagnetic Compatibility Community as a means of comparing data sets will be summarized. The overall goal is to characterize, compare, and validate EM modeling codes in ways most relevant to the end user.
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- UNSW Canberra, ADFA, Australian Capital Territory
- Australia
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- Co-sponsored by Greg Milford