Thomas Herpel
Research
Transmission of Safety-Relevant Sensor Data in Intra-Car Communication Systems
Projektleitung:
Beteiligte:
Förderer:
Mitwirkende Institutionen:
- Safety-Electronics / Airbag-Control-Systems
Stichwörter:
- Automotive Technology, Intra-Car Communication Networks, Safety and Reliability
Laufzeit:
Inhalt und Ziele:
Currently used airbag systems work independently, consisting of
only few external and internal sensors and several firing units. To
fulfill the demands of safety in an automotive environment, sensors
and controllers are designed redundantly, plausibility tests are
performed and activation of actuators is proved against misuse by
so-called safing-concepts.
The connection of different electronic systems within the car -
e.g. electronic stability program (ESP) or anticipatory sensors
with the airbag control unit (ACU) - leads to new architectures
with sensors, actuators and several controllers. As a consequence
of the connection, more signals and sensor data are available to
the single control units and self-test functions can be integrated
in software, increasing the reliability, availability and safety of
the system while costs can be reduced as redundant components may
become unnecessary.
Nevertheless, the complexity of the overall system grows with such
a distributed design of the intra-car network, especially in terms
of predicting performance measures such as latencies, firing times
or failure probabilities.
To overcome this, a method is to be developed to analyze existing
design layouts as well as new architecture patterns, taking into
account key characteristics of network components (bus system and
topology, controller, sensor), investigated scenarios (crash,
roll-over, pre-crash phase, pedestrian protection) and common
reliability engineering methods (SIL, FMEA, FTA, FEM, discrete
and/or continuous simulation, Markov Chains). The method shall be
validated by measurements for an actual system configuration on the
one hand, while its basic applicability to arbitrary design
patterns is to be assured on the other hand. The results are
intended to give a sound basis for predicting the system behavior,
especially when discussing new layout decisions in industrial
committees (VDA) or boards of directors.
Links:
Kontakt:
German, Reinhard
Phone +49 9131 85 27916
Fax +49 9131 85 27409
E-Mail:
reinhard.german@informatik.uni-erlangen.de
