Electrical igniters of vehicle occupant restraint systems can be activated by electrical pulses or high frequency currents caused by electromagnetic fields. In order not to perturb unintentional ignition of the propellant charge and a releasing of the Airbags or the seat belt tightener in the vehicle, the igniters are always qualified with special ESD and RF immunity tests in the development process. Protection concepts against ESD may not affect the safe function of the restraint systems in case of a vehicle crash. Simulations make a fast examination of several test concepts possible and allow checking of parametrical influences in detail. A thermal electrical model of an igniter was developed and verified on the basis of laboratory measurements. The calculation results show a good agreement with measurements. Different configurations were examined and fundamental relations were represented.I.
Abstract. Automotive bus systems like FlexRay or CAN transmit safety critical data. To ensure correct functionality under all circumstances, extensive investigations about signal integrity and EMC have to be performed. To be able to use simulation in this validation process, suitable models for the components of the bus systems have to be developed. This paper shows how a combined transceiver model for signal integrity and EMC investigations can be created. The model shows good results in comparison to measurement data.
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