Authors: Denise M. Rizzo; Periannan Kumaran; Jonathan Zeman; Paramsothy Jayakumar
Addresses: US Army RDECOM TARDEC, 6501 E. 11 Mile Road, MS 157, Warren, MI 48397-5000, USA ' Pratt and Miller Engineering, 29600 W.K Smith Dr., New Hudson, MI 48165, USA ' Gamma Technologies, 601 Oakmont Lane Suite 220, Westmont, IL 60559, USA ' US Army RDECOM TARDEC, 6501 E. 11 Mile Road, MS 157, Warren, MI 48397-5000, USA
Abstract: Military drive cycles typically consist of complex terrains, which include rough and deformable surfaces, steep grades, and sharp turns, which is a contrast to the commercial and passenger vehicle cycles. Typically, a one dimensional (1D) powertrain model is utilised to simulate and predict energy usage over a given drive cycle in GT-SUITE. This 1D model does not take into account lateral dynamics, short wavelength excitations, or tyre performance. These omissions are typically valid for straight line simple terrains where transient conditions are minimal. For complex terrains, such as the aforementioned military cycles, these assumptions are no longer valid and chassis dynamics need to be considered. This paper will demonstrate a transient powertrain dynamic model built in GT-SUITE and a comprehensive chassis dynamic model built in MSC.Adams/Car integrated through a co-simulation framework. It will include a detail analysis to describe the effects of the aforementioned phenomena on the vehicle performance.
Keywords: fuel economy; co-simulation; energy analysis; powertrains; vehicle chassis; simulation; military duty cycles; off-road vehicles; lateral dynamics; short wavelength excitations; tyre performance; off-road mobility; chassis dynamics; vehicle dynamics; dynamic modelling; powertrain dynamics.
International Journal of Vehicle Performance, 2017 Vol.3 No.1, pp.89 - 112
Received: 25 May 2016
Accepted: 09 Sep 2016
Published online: 01 Jan 2017 *