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Energies 2014, 7(6), 3733-3747;

Sensitivity Analyses for Cross-Coupled Parameters in Automotive Powertrain Optimization

School of Engineering, Cranfield University, College Road, Cranfield, Bedford MK43 0AL, UK
Author to whom correspondence should be addressed.
Received: 22 April 2014 / Revised: 27 May 2014 / Accepted: 4 June 2014 / Published: 17 June 2014
(This article belongs to the Special Issue Advances in Hybrid Vehicles)
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When vehicle manufacturers are developing new hybrid and electric vehicles, modeling and simulation are frequently used to predict the performance of the new vehicles from an early stage in the product lifecycle. Typically, models are used to predict the range, performance and energy consumption of their future planned production vehicle; they also allow the designer to optimize a vehicle’s configuration. Another use for the models is in performing sensitivity analysis, which helps us understand which parameters have the most influence on model predictions and real-world behaviors. There are various techniques for sensitivity analysis, some are numerical, but the greatest insights are obtained analytically with sensitivity defined in terms of partial derivatives. Existing methods in the literature give us a useful, quantified measure of parameter sensitivity, a first-order effect, but they do not consider second-order effects. Second-order effects could give us additional insights: for example, a first order analysis might tell us that a limiting factor is the efficiency of the vehicle’s prime-mover; our new second order analysis will tell us how quickly the efficiency of the powertrain will become of greater significance. In this paper, we develop a method based on formal optimization mathematics for rapid second-order sensitivity analyses and illustrate these through a case study on a C-segment electric vehicle. View Full-Text
Keywords: hybrid and electric vehicles; sensitivity analysis; powertrain optimization hybrid and electric vehicles; sensitivity analysis; powertrain optimization
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Othaganont, P.; Assadian, F.; Auger, D. Sensitivity Analyses for Cross-Coupled Parameters in Automotive Powertrain Optimization. Energies 2014, 7, 3733-3747.

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