Weapon System Performance in Complex Radio Frequency (RF) Environments
Navy SBIR FY2008.2

Sol No.: Navy SBIR FY2008.2
Topic No.: N08-121
Topic Title: Weapon System Performance in Complex Radio Frequency (RF) Environments
Proposal No.: N082-121-0007
Firm: Delcross Technologies, LLC
2009 Fox Drive
Unit K
Champaign, Illinois 61820
Contact: Tod Courtney
Phone: (217) 373-4879
Web Site: www.delcross.com
Abstract: Many highly accurate electromagnetic solvers have been developed based on a variety of full-wave and asymptotic algorithms. The tools provide cost effective insight into electromagnetic phenomena and allow analysts to perform trade studies while reducing expensive measurements. By itself, a well-developed EM analysis tool is not sufficient to produce accurate results; accurate results require an accurate input geometry model that is designed to meet the EM solver's requirements. The development of an accurate CAD model and associated mesh of a particular platform can be a labor intensive task. We propose to develop a graphical software tool that will greatly reduce the amount of time spent on preparing meshes and/or surface models for use with EM solvers. The tool's inputs and outputs will include both triangular and NURBS asymptotic models as well as triangular and quadrilateral full-wave meshes. The tool will allow analysts to automatically identify problems with existing meshes based upon user specified criteria related to edge length, aspect ratio, connectivity, etc. Our approach will address the healing of existing models and meshes, the conversion between quadrilateral and triangular meshes, conversion between asymptotic and full-wave meshes, and the conversion between meshes and NURBS models.
Benefits: There is a very significant need for the CAD/mesh healing and regeneration technology proposed in this effort because every electromagnetic analyst faces the challenge of acquiring a high quality mesh that accurately represents the geometry of interest as required by their analysis tool of choice. The proposed technology would be a natural complement to the CEM solver technologies in use throughout government agencies and government contractors by providing users with the ability to import CAD formats, fix existing meshes, convert asymptotic meshes to full wave meshes, scale a mesh to a new frequency through the use of a reconstructed intermediate surface model, and other CAD/mesh pre-processing steps involved in a CEM analysis. The process in use today for resolving these issues is not trivial and often requires the use of multiple surface editing and meshing tools and a significant number of labor hours by a user experienced with the process. We plan to integrate the proposed CAD/mesh healing technology into the CEM software products that we are currently developing at Delcross for use by both government agencies and commercial companies. We view the CAD/mesh pre-processing feature as a critical capability for these tools because analysts in these markets have very little time to work on CAD/mesh issues. We also plan to offer the CAD/mesh healing capability as a stand-alone product for organizations already using CEM solvers developed by other companies. These organizations will still be able to greatly benefit from the proposed technology to create meshes for their solver of choice. We know of no CEM software package that provides the capability in our proposed effort. The software that we would sell would be customized for the CEM application and would be significantly more affordable and easier to learn than other general-purpose CAD tools. For these reasons, we view the proposed effort as having very significant commercial market potential and providing multiple sources of revenue. We anticipate this customer base will be composed of military organizations, defense contractors, and commercial companies.