Title :
Optimal control techniques for assessing feasibility and defining subsystem level requirements: an automotive case study
Author :
Kolmanovsky, Ilya V. ; Stefanopoulou, Anna G.
Author_Institution :
Ford Res. Lab., Dearborn, MI, USA
fDate :
5/1/2001 12:00:00 AM
Abstract :
The use of models is widespread in the automotive industry in the preliminary feasibility assessment of novel powertrains, determination of system configuration and subsystem requirements, and operating strategy. Although optimal control problems arise naturally within this context when faced with analysis of transient performance requirements, they are rarely treated other than by simulations. The objective of the paper is to illustrate how optimal control problems of this kind arise and can be solved numerically using optimal control techniques. We also demonstrate an array of meaningful conclusions that can be generated from such an optimal control study. The case study treated in the paper deals with a turbocharger power assist system (TPAS). The extent to which this system can reduce the diesel engine turbo-lag is determined via the numerical solution of a minimum-time optimal control problem
Keywords :
automobiles; internal combustion engines; optimal control; optimisation; splines (mathematics); diesel engine turbo-lag; feasibility assessment; minimum-time optimal control problem; operating strategy; powertrains; subsystem level requirements; transient performance requirements; turbocharger power assist system; Analytical models; Automotive engineering; Context modeling; Diesel engines; Electrical equipment industry; Mechanical power transmission; Optimal control; Performance analysis; Power system modeling; Transient analysis;
Journal_Title :
Control Systems Technology, IEEE Transactions on