- Self-driving snow removal vehicles in test operations with Fraport
- Premiere of the latest Mercedes-Benz "Remote Truck Interface" technology
- Real-time data sharing among all vehicles
- Airfield clearance requires high-precision driving: the Arocs makes it possible
- Proven series-production technology is the basis for advanced innovative solutions
Stuttgart /
Bad Sobernheim – In an unprecedented test, Daimler AG is demonstrating
another potential solution for the future use of automated commercial
vehicles. Following the successful demonstration of the innovative
Highway Pilot and Highway Pilot Connect systems, the latter making
truck platooning possible, the company today presents another
development step forward on the road to the fully connected and
autonomous commercial vehicle.
On the site of the former
Pferdsfeld airbase, the world's leading manufacturer of commercial
vehicles demonstrates the practical application of automated snow
removal operations at airports based on a specific customer
requirement.
Martin Daum, the Daimler AG Board of Management
member responsible for Daimler Trucks, emphasises: "We are not just
talking about new technologies, we are bringing them onto the road.
Step by step we are developing our very latest assistance systems even
further – with a view to automated driving. We are currently working on
the implementation of two specific use cases: Firstly automated
driving in quite normal traffic on motorways – with the clear aim of
relieving driver workload and significantly improving safety. And
secondly driverless operation in enclosed areas to significantly
improve productivity. With today's demonstration of automated snow
clearance on an airfield, we are once more reinforcing our claim to
technological leadership."
Under the project name "Automated
Airfield Ground Maintenance“ (AAGM), four Mercedes-Benz Arocs tractor
units demonstrate automated airfield clearing in a remote-controlled
convoy. The benefits are obvious: Airfield clearances are hard to
predict and thus difficult to plan, especially in winter. This makes
snow removal units operated with pinpoint precision by a single vehicle
operator to remove snow from runways especially crucial when extreme
weather strikes without warning during the winter months, and they
require no additional vehicle and staff scheduling.
The project
was established in close cooperation between Lab1886, the Daimler
innovation incubator, Daimler Trucks and Fraport AG. Lab1886 actively
supports the transformation of Daimler AG from an automotive
manufacturer to a mobility provider, and works closely with the Daimler
CASE initiative. CASE – � these letters shape the future of mobility
and are an integral part of the corporate strategy of Daimler. They
stand for the fields of connectivity (Connected), autonomous driving
(Autonomous), flexible use (Shared & Services) and electric
powertrains (Electric).
"The mission of Lab1886 is to develop
new innovative business models for Daimler. The Fraport project is a
great example in this regard. It shows how we bring together
innovations with specific customer needs to develop new markets“, says
Susanne Hahn, Head of Lab1886.
"As one of the first airports
worldwide, we are pleased to be contributing our know-how to this
innovative project. It enables us to examine autonomous control of
heavy winter service equipment in the especially challenging winter
conditions of an airport. We hope to obtain findings that will help us
to plan the future deployment of equipment even more precisely and
efficiently under sudden wintry conditions. Our commitment once again
underlines the role of Fraport AG as an innovation driver in a wide
range of areas," says Mathias Dudek, head of Infrastructural Facility
Management at Fraport AG.
Based in Frankfurt/Main, Fraport AG
operates one of the world's largest air traffic hubs. The objective of
the joint testing activities is the implementation of state-of-the-art
telematics-based vehicle control technology in areas not accessible to
the public. This is one of the key aspects in which the new
application differs from the technology milestones in the area of
autonomous driving developed and realized for practical testing by
Daimler to date. The Highway Pilot and the Highway Pilot Connect system
presented for platooning are designed for use on public roads.
In
addition to a comprehensive set of requirements on automated operating
machines, Fraport also supplies the snow removal equipment for this
unparalleled test. Among the equipment are four so-called sweeper
blowers of the kind already in operation today as semitrailers towed by
still conventional Mercedes-Benz tractor units.
Premiere for the "Remote Truck Interface" (RTI)
The
four Arocs test vehicles are equipped with the new Remote Truck
Interface (RTI) for remotely controlling vehicle functions and
exchanging data. The RTI is the centrepiece of the new technology, for
which Daimler can draw on a significant pool of knowledge and
engineering from projects such as the advanced Highway Pilot and
Highway Pilot Connect systems.
All vehicles are fully
interlinked via the RTI by means of telematic systems, all operate
automated and all are able to lead or follow in the vehicle convoy.
Specifically, this means that a convoy leader chooses a random unit
from a fleet of available semitrailer combinations and defines this as
the "lead truck". He then uses a control panel to define the number and
sequence of the other convoy vehicles, and conducts a pre-operation
inspection of his and all other semitrailer combinations.
What
sounds simple is actually just as simple in practice. However, the
complexity of the software behind it is enormous. All vehicles are
equipped with dual GPS tracking (DGPS) and of course state-of-the-art
vehicle-to-vehicle communication (V2V communication) technology.
In
addition, the interplay of the innovative RTI and the remote control
unit provides extremely fast and not least secure date exchange among
vehicles. To make this work in real time, a full data exchange between
the vehicles and the main control unit of the RTI takes place every
0.1 seconds. The transmissions in the area of V2V communication are
based on the "Digital Short Range Communication DSRC“ technology.
Looking ahead: automated driving offers a wide range of possible applications
The
automated snow removal convoy comprises four vehicles during the test
phase and can be expanded to up to 14 units. It paves the way for
further applications. In addition to other airports that have already
signalled interest in such precision work machines for automated runway
maintenance, solutions for a wide variety of applications are feasible
thanks to the Mercedes-Benz Remote Truck Interface.
"This
opens up new possibilities for our customers: High-precision
manoeuvring procedures of conventional trucks, remotely controlled by
the driver outside the cab – for example, positioned at the rear of the
vehicle with a perfect view of the manoeuvres – are possible, as is
unmanned driving in mines, at container terminals or other closed-off
sites", says Martin Zeilinger, Head of Advanced Engineering at Daimler
Trucks.
The tasks of the automated Arocs in AAGM (Automated Airfield Ground Maintenance) test operations
In
the case of the demonstration of the Arocs tractor units, the Remote
Truck Interface connects the vehicle with the outside world. The
control functions for track guidance and operation of the convoy are
housed in additional external control units such as the track computer,
the operating panel and the wireless interface. Specifically this
means that the automated Arocs trucks are able to perform the following
functions:
- Control: engine start/stop
- Control: parking brake
- Vehicle lateral control: steering
- Vehicle longitudinal control: engine control (throttling up and down)
- Vehicle longitudinal control: service brake
- Powertrain management: transmission (engage start-off gear, all gear changes, engage neutral)
- Powertrain management: activation and deactivation of the differential locks
- Peripherals: lights including turn indicators, rotating beacons and much more
- Special functions: body control; here: control of the mounted sweeper blower
The
RTI control unit allows actuation of all connected vehicle functions
via an interface (CAN). Remote control is thus possible by integrating a
wireless interface into the CAN.
"An important component of the
RTI control unit is the integrated safety concept. This means that all
vehicle functions are monitored. The safety routine is executed as
soon as an error occurs. In this way we can ensure that the vehicles
can be stopped safely and quickly if needed, and can then simply be
operated manually", Zeilinger adds.
The test operations: snow removal equipment must offer highly flexible responses
In
the past, airport operators have had to keep the required removal and
cleaning equipment in an operational stand-by condition. The lead times
for relatively rare and usually short-lived bad weather periods tie up
major capacities.
On the other hand, an airfield requires
consistent and thorough clearing operations even when just a little bit
of snow covers the ground. On such sites, the snow must be cleared to
one side over a width of up to 60 metres in a single pass. In the case
of Frankfurt Airport today, up to 14 vehicles drive in a convoy with
the appropriate overlap.
This means the snow is "passed on" from
the front to the rear from one vehicle to the next. As a result, the
snow load increases from vehicle to vehicle, and the performance
requirement for the individual snow removal units rises sharply from
front to rear. Furthermore, the staggered driving also makes
high-precision guidance crucial for the quality of the clearing
pattern. All this necessitates highly dissimilar requirements on the
performance of each snow removal vehicle.
Efficient operations thanks to automated snow removal machines
In
the case of Frankfurt-Main airport, the convoy must keep the runways
and taxiways free from snow and ice as a precisely staggered formation.
To date, snow clearance machines have worked their way along metre by
metre under poor visibility conditions in darkness and fog, with snow
constantly being thrown up by the vehicles driving ahead.
The
poor visibility often leads to increasing distances between vehicles,
opening up the convoy and extending the time it takes to clear a
runway. Moreover, poor visibility can lead to the outer vehicles
damaging the runway marker lights, which are very expensive to repair.
In
the test of the autonomously operating snow removal trucks of Daimler,
a predefined snow removal programme – under the constant control of a
convoy leader – specifies the routes, direction and speed. The person
in the lead vehicle of the removal convoy in charge of the demanding
task enjoys relatively good visibility of the swaths to be cleared
ahead of the lead and the trailing vehicles.
The swaths to be
cleared are predefined with the goal of a high-precision clearing
trajectory. This means the routes to be driven are always specified
cartographically and are followed with pinpoint precision thanks to a
differential GPS system – accuracy: three centimetres – by the lead
vehicle as well as the other convoy vehicles thanks to constant
target/actual comparisons.
A high level of flexibility is also a
must for snow clearance operations on airfields. That is why the
convoy leader – owing to suddenly identified and then immediately
required deviations from the digitally specified clearing path – is
able to take over the routing personally at any time.
To this
end, the convoy leader has the classic controls - steering wheel,
accelerator and brake pedal - at his disposal in each Arocs – and
thereby full control over the vehicle. The trailing vehicles then
immediately and fully automatically adopt the target paths resulting
for them from the change of the route of "vehicle 1".
All-wheel drive Arocs 2045 AS 4x4 as the basis for the snow-clearing semitrailer combination
The
prototype convoy from Advance Engineering presented now comprises four
individual vehicles initially. The basis is provided by
all-wheel-drive Mercedes-Benz Arocs 2045 AS production tractor units
from the robust Grounder product range, equipped with the latest
OM 470 LA engine generation certified to Euro VI standards with an
output of 315 kW (428 hp) and producing 2100 Nm of torque. At a brisk
speed, most of the mass of snow is thrown to the side by a fully
hydraulic, three-section snow plough measuring eight metres in width.
The
finishing surface clearing touches are carried out by a sweeper, a
so-called sweeper blower. It is towed as a semitrailer and powered
independently of the tractor unit by a six-cylinder engine from
Mercedes-Benz installed at the rear of the semitrailer.
The
entire tractor/semi-trailer combination is 23 metres long and weighs
25 tonnes in operational condition. The tractor unit, which was
reinforced in the area of the snow plough mounts, accounts for about
ten tonnes, the plough blade adds two tonnes to the total weight, the
semi-trailer with the sweeper blower has a gross weight of 13 tonnes.
Innovation as a tradition: Daimler Trucks is the leader on the road to autonomous driving
Mercedes-Benz
has traditionally taken the lead in new safety and assistance systems,
and in improving the driver-friendliness of commercial vehicles. The
same applies to networking and automated driving. Know-how accumulated
over decades is the basis for developments such as the Highway Pilot
and Highway Pilot Connect, on the road to automated driving.
The
Future Truck 2025 presented in 2014 with the Highway Pilot system was
the answer to the challenges of the future: increasing traffic,
inadequate infrastructure, growing cost pressure and shortage of
drivers. Based on the current Mercedes-Benz Actros and its numerous,
improved assistance and telematic systems, it ushered in a new era for
road goods transport.
Only one year later, the Freightliner
Inspiration Truck continued to write history. Its technology is based
on the Future Truck 2025, but adapted to suit North American operating
conditions. The Freightliner Inspiration Truck was the world's first
automated driving truck to have operating approval for the public roads
of Nevada.
Shortly afterwards, Daimler Trucks opened up a new
chapter in Europe: in autumn 2015, a standard Mercedes-Benz Actros with
the Highway Pilot was given approval for public roads as a test
vehicle. It is permitted to drive on all German autobahns in
semi-automated mode. This means that the vehicle drives automated, but
the driver must constantly monitor the system and be able to take over
control at any time.
While the Mercedes-Benz Future Truck 2025
was a concept vehicle, the transition to series production technology
has proved successful in the form of the Mercedes-Benz Actros with the
Highway Pilot. It demonstrates the everyday suitability of automated
driving.
As early as 2016, three Actros trucks with the Highway
Pilot Connect took to the roads: the technology allows electronic
docking by vehicles on motorways and long-distance highways, also known
as "platooning". During the cross-border European Truck Platooning
Challenge, Daimler Trucks was able to demonstrate the advantages of
electronic vehicle-to-vehicle networking on the journey to Rotterdam.
In truck platooning, connectivity and automated driving increase safety
for trucks driving in convoy, relieve driver workload and improve fuel
efficiency by reducing distances between vehicles.