A bstrcrct-An electric gun computer simulation code has been developed, tested and validated a t the Electric Armaments Division (EAD) a t the Army Research a n d Development Engineering Center (ARDEC), Picatinny Arsenal, New Jersey. The Army Railgun Modular Simulator (ARMS) is a rail gun and pulse power supply numerical code that predicts the t i m e v a r i a n t r e s p o n s e of a c o u p l e d electromechanical system.The ARMS code is a personal-computer-based program which employs a user-friendly input interface called the "Designer" and a companion numerical simulator called the "Simulator".Both the Designer and Simulator use a bulldieg block, or modular, approach to modeling a complete EM gun system. With this approach the computer program is readily reconfigurable and a d a p t i v e t o t h e c h a n g i n g needs of t h e experimentalist and program manager alike.The output of the code has been measured against actual single-shot data and mainframe/P-Spice simulator benchmarks.An overview of the current status, featbres, p r o g r a m a r c h i t e c t u r e , m a t h e m a t i c a l rationale a n d future software directions for the ARMS code are presented.
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