Truck & Off-Highway Engineering - February 2019 - 26

and even more


Bendix Commercial Vehicle Systems testing
various aspects of ADAS technologies on a closed track.

The commercial-vehicle market is eager to adopt more ADAS and automateddriving innovations, but before those technologies get to the road, they must
first pass rigorous testing practices that prove their efficacy.


hen it comes to testing advanced driver-assistance systems (ADAS), comprehensive is the word. Hours and
hours and hundreds of thousands of miles are spent
testing to ensure a product is market-ready.
"To get that product to market the things that become important
overall-especially from the ADAS perspective-are to make sure that
the system operates properly in a variety of conditions and to make
sure it's maintainable. It needs to do what it's supposed to do, and not
do things that aren't expected, like giving false alerts or braking when
it shouldn't," said Bendix Commercial Vehicle Systems' Fred
Andersky, Director of Marketing and Customer Solutions, Controls.
Not only does that mean testing in all weather conditions, but getting the technology into the hands of real fleets and drivers to put it
through real operational protocols. "And you have to be able to test
and review the maintenance aspects: You want to make sure if you're
fixing the radar, for instance, that you don't inadvertently affect the
operation of another interconnected system, because as systems become more and more complex, changes that you make to one may
have impacts on others," Andersky noted.
The supplier and developer uses both physical testing and simulation
to prepare products for market. "We have a strong, what we call hardware-in-the-loop (HIL) approach-where we can actually have different
parameter settings on a computer and actual equipment that's built
into this hardware-in-the-loop so we can see how the system will respond and what will happen in that response," Andersky told Truck &
Off-Highway Engineering Magazine. "That allows us to fine-tune the
parameter setting and we can get a lot of that done up front."

Logging the miles
To physically test variety parameters, testing moves to the track followed by additional fine tuning. Mileage accumulation comes next,
where the corporate test fleet gets 10,000 to 30,000 miles to see how
the system responds. Once the company reaches a point of comfort
from a mileage-accumulation standpoint, Bendix takes it to fleet customers to test in real-world conditions.
At this stage of testing, Andersky said they look to get into the
100,000-mile (or so) range across a couple of different customer fleets
and operating parameters in a wide variety of environmental conditions.
As Bendix runs this regimen, it also is performing additional testing and
26 February 2019

evaluation, which might involve not only on-road trials
and on-track simulation testing, but also winter test,
which is done at Keweenaw Research Center (KRC) in
Houghton, Mich., a part of Michigan Tech.
The components themselves are tested to ensure
nothing breaks and to validate winter performance in
different conditions (using salt and humidity baths,
for example).
Following a successful fleet trial, when Bendix is ready
for product release "it becomes important to keep in
mind that we're not just releasing a product. Because
we're a Tier 1 supplier, the OEM is going to take our product and do their level of testing in their vehicles, in their
production operations," Andersky explained.
Bendix also performs simulation. "Oftentimes when
we're developing new systems, we're setting parameters for how the system's going to work," Andersky
said. "Back in the old days, we used to do it [testing]
where you'd try a parameter setting: you'd run it, get
results, and then you would change one of the 25
parameters; see what that does." Simulation obviously brings significant time and cost efficiency to
that practice.
The testing process varies and can depend on the
component or system. Some product development
can be relatively quick, especially if the company is
building on a foundation of a previous product. But
using the example of Bendix's Stability Control
(launched in 2005), Andersky said it took a lot longer
in terms of testing.
For global supplier dSPACE Inc., comprehensive is
also the word when it comes to ADAS testing. The
company offers tools to develop and test embedded
software for ADAS and autonomous driving systems
to its OEM, Tier 1 and Tier 2 suppliers. "These solutions
are very wide ranging across the development V-cycle,
as well as very detailed to provide a comprehensive
toolchain," Mahendra Muli, Director - Marketing & New
Business Development for dSPACE Inc.
The company has simulation platforms for modelTRUCK & OFF-HIGHWAY ENGINEERING


by Jennifer Shuttleworth


Table of Contents for the Digital Edition of Truck & Off-Highway Engineering - February 2019