Modeling, design, control and optimization of
hybrid vehicles.
The aim of this talk is to propose a framework for the analysis and
design of hybrid vehicles. We postulate that hybrid vehicle analysis
and design is concerned with the storage of energy in three domains -
chemical, mechanical, and electrical - and with energy conversions
between these domains. Some of the conversions are bi-directional
(e.g.: motor-generator action), some are not (e.g.: fuel
chemical-to-mechanical energy via thermal engine). Each domain is
characterized by energy storage devices (e.g.: fuels, batteries,
flywheels), and the energy conversion devices form links between
domains. Energy conversion devices belong to one of two types:
inter-domain and intra-domain. The former (e.g., electric machine,
combustion engine), perform a conversion between domains; the latter
convert energy within one domain (e.g.: gearbox, power electronic
converter, fueling system, fuel reformer). We observe that control
actions always take place at the intra-domain energy converters
(shifting gears, controlling fuel flow, controlling electrical power
flow); thus, we allow these elements to be multi-port elements with
additional control inputs.
The talk will present a normalized and unified description of hybrid
vehicles based on composable and scalable subsystem models, and will
introduce a number of optimization and control problems that arise in
connection with the design of hybrid vehicles and of related control
strategies.