Abstract
This paper describes an effort by the US Army Tank–automotive and Armaments Command, Research, Development & Engineering Center (TACOM–TARDEC) to validate a dynamic model of an M923 cargo truck towing a howitzer, and subsequently, use that model to investigate the dynamic performance of the combination while conducting a full matrix of tests to evaluate its stability and handling during braking manoeuvres in response to varying loading and operational conditions. The Analytical Simulation Team (AMSTA–TR–VP) of the Virtual Prototyping Business Group was tasked by the Combat Support Office (TACOM–CSO) to develop and validate high–resolution, computer–based models of the M939 Series Truck (with 14 × R20 tyres) towing an M198, medium, 155 mm howitzer (with 11 × R20 tyres) for the purpose of investigating truck/howitzer dynamic stability while negotiating specially designed on–road braking manoeuvres over a range of vehicle speeds. The follow–on analysis is also intended to determine what influences the 7257+ kilogram (kg) howitzer has on the stability of the truck during braking manoeuvres when the truck is operating in an unloaded condition.
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