A model-based supervisory energy management strategy for a 12 V vehicle electrical system. (November 2015)

• Record Type: Journal Article
• Authors: Waldman, Colin; Gurusubramanian, Sabarish; Fiorentini, Lisa; Canova, Marcello
• Is Part Of: Control engineering practice. Volume 44(2015)
• Page Start: 20
• Page End: 30
• Publication Date: 2015-11
• Subjects: Automotive -- Energy management -- Electrical system -- Model-based control -- Optimal control; Automatic control -- Periodicals; 629.89
• DOI: 10.1016/j.conengprac.2015.05.011
• Languages: English
• ISSNs: 0967-0661

Abstract

Abstract: This paper describes the development, implementation, and experimental verification of a supervisory energy management strategy for the vehicle electrical system of a passenger car. The control strategy commands the alternator duty cycle such that vehicle fuel economy is optimized whilst the instantaneous load current demand is met and constraints on the system voltage and battery state of charge are satisfied. The work is based on a control-oriented model of the vehicle electrical system, experimentally validated against vehicle data. Then, a constrained global optimal control problem is formulated for the energy management of the electrical system, and analytically solved using the Pontryagin׳s Minimum Principle (PMP). The optimal solution obtained is evaluated for a range of different driving cycles and electrical load current profiles, leading to the formulation of an adaptive supervisory control strategy that is implemented and tested in vehicle.