Scientists at the German Aerospace Center (DLR) in Stuttgart are building a small automated guided vehicle (AGV) for the Airport in Frankfurt. Because a large number of vehicles use the same infrastructural facilities, the control of automated guided vehicle (AGV) traffic at a container terminal is crucial to the system performance.(1,5 KW-380kg)

A new modelling technique which has been used to successfully model the relevant aspects of traffic control is presented in this paper. The control can be imposed by using a hierarchical system of so called semaphores, thus it is possible to follow a structural approach in the design of a traffic control configuration. The technique has been used to model an elementary terminal configuration and tested in a simulation model.

PEMFC has several useful characteristics: for example, PEMFC has a high power density, which results in lower weight, volume, and cost. Another advantage is the low temperature (50-100 °C), which allows for quick starts and instant response to changes in the demand for power. Both high power density and the low temperature make PEMFC the system of choice for vehicle applications. The choice of a membrane technology makes it possible to mass produce cells and thereby reduce the cost per cell. Another advantage of using the immobilised electrolyte membrane is a reduction of corrosion problems.