Modeling and verification of Hybrid Electric HMMWV performance

Abstract

The U.S. Military, through the Defense Advanced Research Projects Agency (DARPA) and the U.S. Army Tank-automotive and Armaments Command (TACOM) have sponsored the development of three different versions of the Hybrid Electric High Mobility Multipurpose Wheeled Vehicle (HE-HMMWV). The most recent version of this vehicle was designed by PEI Electronics, Inc. (PEI) and a limited number of prototypes have been constructed. This paper describes the modeling of this vehicle using a set of customized model components that have been formulated using the PNGV Systems Analysis Toolkit (PSAT). Model output has been obtained for the standard Federal Urban Drive Cycle (FUDS). In an effort to provide model verification, the model output data is compared to field test results obtained from a prototype vehicle driven to mimic the FUDS profile. Comparison between model output and field data shows generally good agreement demonstrating the value of model performance prediction. Additional improvements are expected to result from continuing analysis of field data and more accurate incorporation of vehicle control strategies and component behavior.