Autonomous Vehicle Engineering - September 2021 - 6
Cover Story
"
Once you start developing and looking at the data, you see it might be
poor quality and how much additional software effort is required.
"
SIMPHERA can simulate and validate millions of test cases in the cloud, offering scenario-based evaluation of AV-system safety according to SOTIF.
" The focus was on improving the computing
ability and hardware development for the 'virtual
driver' and how to scale that development, " Pandy
explained. " The diagnostic capabilities of the vehicle
actuation systems were still at the same level as how it
was developed for the core ADAS functions and were
dependent on the safety driver in the vehicle during
these development phases. "
As AV development enters the " shakeout "
phase, where the integrated vehicle platform accumulates
significantly more mileage and infrastructure
setup begins, the focus shifts more to creating
the reliability metrics necessary to build confidence
prior to rollout.
" Diagnostics play a major role in supporting
these reliabilities, and it's not just the number of
miles driven without interventions or the number of
trips being completed, " Pandy said. " It's imperative
to have the predictive diagnostics and not have any
latent failures in the system in order to make the call
for the driverless launch. "
Smart diagnostic features should include a " self
test " at the beginning of the journey to check for any
pre-existing faults, Pandy said. A passing test can be
a condition required to enter autonomous configuration.
Self-test can be done either by simulating inputs
internally within the fail-operational steering system,
for example, or can be executed by the virtual driver
before requesting autonomous configuration.
After a successful self-test, " dynamic diagnostics "
can help continuously check for validity of the
inputs required to detect for normal steering effort.
Feedback can be provided to the virtual driver and
vehicle trajectory planning can be enabled to handle
any latent faults. " For example, by going to a safer
speed before entering a tighter curve or ramp. This
can help ensure safe maneuvering of the vehicle, "
he said.
6 September 2021
AUTONOMOUS VEHICLE ENGINEERING
dSPACE
Autonomous Vehicle Engineering - September 2021
Table of Contents for the Digital Edition of Autonomous Vehicle Engineering - September 2021
Autonomous Vehicle Engineering - September 2021 - CVR4
Autonomous Vehicle Engineering - September 2021 - CVR1
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Autonomous Vehicle Engineering - September 2021 - 1
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Autonomous Vehicle Engineering - September 2021 - 5
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Autonomous Vehicle Engineering - September 2021 - CVR3
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