This paper describes the evaluation of fuel optimal trajectories of a fuel cell powered vehicle along a given route. The optimization is based on the theory of Optimal Control, which has been applied by means of a control-oriented model developed for this purpose. The latter is a reduced complexity version of a physical model of the fuel cell vehicle, whose derivation is presented in the paper....

The department REI/EP at DaimlerChrysler Research and Technology and the Laboratory for Efficient Energy Systems at Trier University of Applied Science, are developing control functions and fuel optimal strategies for low speed conditions. The goal of this thesis project was to further develop the fuel optimal operating strategies, and implement them into a test vehicle equipped with a dSPACE e...

Design of fuel/time optimal control of the benchmark two-mass/spring system is addressed in the frequency domain. The optimal control profile is represented as the output of a time-delay filter, where the amplitude of the time-delayed signals are constrainted to satisfy the control bounds. The time delays of the filter are determined by solving a parameter optimization problem that minimizes a ...

The problem addressed is how to control vehicle speed over a given distance on a given time such that fuel consumption is minimized. Analytical expressions for the necessary optimality conditions are derived. These expressions are essential for the understanding of the decisive parameters affecting fuel optimal driving and the analytical optimality conditions make it possible to see how each pa...

Due to the complex nature of hybrid electric vehicles, control strategies based on engineering intuition frequently fail to achieve satisfactory overall system efficiency. This paper presents a procedure for improving the energy management strategy for a parallel hybrid electric truck on the basis of dynamic optimization over a given drive cycle. Dynamic Programming techniques are utilized to d...

Maximization of the catalyst efficiency in automotive fuel-injection engines requires the design of accurate control systems to keep the air-to-fuel ratio at the optimal stoichiometric value AF . Unfortunately, this task is complex since the air-to-fuel ratio is very sensitive to small perturbations of the engine parameters. Some mechanisms ruling the engine and the combustion process are in fa...

Time and fuel balance is an important topic in the dynamic tracking problem of unmanned systems. In this paper, we propose a quasi time-fuel optimal control strategy (QTFOC) to solve double integrator system, which capable multi-target switching tasks, such as strike weapons rapid grabbing robots on industrial assembly lines. Compared with previous algorithms, proposed controller retains charac...

Develop solid oxide fuel cell (SOFC) materials and • architectures for robust operation on renewable/ biomass fuel streams. Identify optimal fuel-processing strategies for renewable • fuels, specifically biogas derived from anaerobic digesters commonly utilized for sludge remediation at wastewater treatment facilities. Employ system modeling to optimize SOFC system • configurations. Extend mode...