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On the fault-injection-caused increase of the DAE-index in analogue fault simulation



IEEE Computer Society:
European Test Workshop 1999. Proceedings
Los Alamitos, Calif.: IEEE Computer Society, 1999
ISBN: 0-7695-0390-X
ISBN: 0-7695-0391-8
European Test Workshop (ETW) <1999, Konstanz>
Conference Paper
Fraunhofer IIS, Institutsteil Entwurfsautomatisierung (EAS) ()
differential algebraic equations (DAE); simulation; network; circuit simulation

This paper demonstrates the possibility of occurring numerical problems in analogue fault simulation due to a fault-injection-caused increase of the DAE-index. Based on analytical results and fault simulation experiments with two electrical networks it is described that a network showing no numerical problems during its fault-free simulations may increase its index as a result of the injection of a fault. The higher index causes numerical problems during the simulation. Some suggestions to tackle such index problems will be discussed.