Autonomous Vehicle Engineering - November 2021 - 17

ADAS
laptop computers stacked on top of one another, and
we've maintained really good latency by scaling that.
How will Ultra Cruise interface with
mapping data compared to Super Cruise?
We do have a map for Ultra Cruise, and it is different
from Super Cruise. The Super Cruise map is generated
from high-definition lidar scans of interstate roads in
the U.S. and Canada. Expanding to what is ultimately
3.4 million miles is financially impractical with HD
lidar scans. So we've got our own in-house technology
that we've developed, where we are generating the
map, and we have various sources of input data to
that map generation technology. That map will then
be loaded on every car.
You mention Ultra Cruise covering 95%
of driving scenarios. What are the 5% not
covered, and how will the driver be notified?
One example of the type of scenario [not covered]
is a roundabout. A roundabout is a really complex
maneuver. Sometimes they have single lanes and
they're not very complicated. Sometimes there are
multiple lanes. Sometimes there are up to five or six
different roads coming into a roundabout. So that is
an example of a situation where we'd ask the driver to
come back in, complete the maneuver, and then we'll
do an automatic re-engage.
We will know when these scenarios are coming
because of what we're able to see with the perception
system, and the information we have in the map. We've
developed a new customer notification method using
the steering wheel light bar, similar to what we use for
the escalations we have in Super Cruise. We've developed
a new scenario that we call a 'non-urgent escalation'
and will ask the driver to take control of the wheel.
Once the touch sensors on the wheel have confirmation
the driver is in control, the light bar will turn off.
The driver will complete the maneuver and then Ultra
Cruise will automatically re-engage once we're beyond
that maneuver and all the conditions are met.
When we start, this non-urgent escalation is
going to be a function of the speed of the car coming
into the maneuver. We want to ensure that whether
we're slowing down or whether the driver is slowing
down, there's adequate time to do a nice, gradual
deceleration. The slower you're going coming into
the maneuver, the later the escalation will come up.
CarSim, TruckSim, and BikeSim
Vehicle Dynamics Software for ADAS and Automated Driving
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Autonomous Vehicle Engineering - November 2021

Table of Contents for the Digital Edition of Autonomous Vehicle Engineering - November 2021