winADAM (Automated DAta acquisition in Mobile applications)

Realistic driving cycles are of great importance for the prediction of fatigue life, emissions and fuel consumption. The winADAM measurement data acquisition system, which was specially developed for this purpose, records video data and position in addition to various driving dynamics and mechanical variables. Our own measurement vehicle (MB CLA 180 d Shooting Brake) is available for test drives.

winADAM is a measurement data acquisition system that can be

• installed in the vehicle and the measurement started within approx. 1 minute,
• records extensive operational data without the need to install additional sensors,
• is extremely robust. Tank missions and drives on the Nürburgring were carried out without any problems.

These measurement data are used to assess powertrains, driver behaviour, real time control of test rigs or to collect basic data for simulations.

Measurement System winADAM

Structure of the Measurement System

winADAM consists of a measuring case (Fig. 1) in which the following sensors are installed in addition to a notebook computer:

• Yaw rate sensor
• GPS receiver
• Pressure sensor
• Video camera
• 3 acceleration sensors in longitudinal, transverse and vertical direction
• Temperature and humidity sensor.

Prepared Cconnections for further Measurement Values

An analogue-digital converter enables the recording of a further 5 analogue channels with a voltage between -10 and + 10 V. The recording of these 5 channels always takes place even if there are no external input signals.

A CAN interface is integrated and the recording of 20 CAN signals also always takes place. The configuration of the CAN data is read out from the customer-definable *.dbc file. This allows the user to define the data to be read out himself.

The connection of further temperature measuring points via USB is prepared.

Sample Rates for Measurement

winADAM can be used for long-term measurements over several days or even weeks with a low sampling rate as well as for highly dynamic short-term measurements. The sampling rates can be set within the following limits:

• Video, 1-24 Hz
• Analogue channels, 1-200 Hz
• CAN-channel, 1-200 Hz
• USB (e.g. temperature) 1 Hz

Installation in the Vehicle

The following actions are necessary when installing the measuring case::

• the case must be placed horizontally in the vehicle,
• the GPS antenna with magnetic base must be fixed on the roof,
• the camera is fixed to the windscreen with a suction tripod,
• if CAN data is to be recorded, the CAN interface must be connected to the vehicle CAN, which is done using a USB plug. After switching on the computer, the measuring programme is started automatically. The vehicle should be as horizontal as possible, as the accelerometers are calibrated first. If the vehicle is leaning, a subsequent correction is possible.

Carrying out the Measurement

Evaluation Software

The powerful evaluation software provides the following functions:

Plausibility Check and Generation of Files for further Applications

In a first step, the measured data and their availability and plausibility are checked, possibly faulty areas are marked and interpolated if necessary. During this step, files are also written for optional use in the EXCEL and DIADEM programmes and files are generated for simulation and test rig control with winEVA.

Data Visualisation

POST-PROCESSING OF DATA

The measurement can be graphically post-processed interactively. Partial distances can be created, which can then be combined in any order. If several routes are attached to each other, a correction of the time and path coordinate is automatically carried out.

The measured GPS coordinates are connected with the help of a spline function.

Since on many measurement runs the driver is alone and no markers can be entered during the run, this can also be done during post-processing by determining traffic restrictions, place names, traffic influences, etc. on the basis of the video image.

The evaluation software allows a geographical map to be copied to the clipboard and added to the course. Furthermore, a file is automatically generated that can be directly displayed in Google-Earth. In this way, very detailed information can still be obtained subsequently, which gives a very comprehensive picture of the measurement runs. Individual routes or the entirety of all measured routes can also be displayed in Google Earth, so that a geographical database of the measurement runs is obtained.

In order to record the measured topography as accurately as possible, it is determined with the help of the GPS signal, the pressure signal and optionally with the help of other measured variables. The accuracy of the data depends on various conditions and is constantly assessed and the optimum correction calculated.

Screenshot of the display of the measurement results in three time-synchronous windows

Conducted measurement run (yellow-red), which can be displayed immediately in Google Earth.

Publications

[10] Willmerding, G.: Jehlicka, E.: Verbrauchsuntersuchungen an Stadtbussen; Der Nahverkehr Heft 5 1986

[11] Willmerding, G.: A simulation system to study the working conditions of vehicles and to develop fuel efficient drivetrains, publication on the FISITA-congress 1992, Institution of mechanical engineers, London 1992

[12] Willmerding, G.: Ein Simulationsmodell für Kraftfahrzeuge im Verkehrsfluß, publication on ASIM-congress TU-Berlin 1993, Fortschritte in der Simulationstechnik, 8. Symposium 1993, Band 6, ISBN 3-528-06555-9

[13] Böhm, Jehlicka, Willmerding: research of a modern freight traffic-system by using computer simulation, publication on the FISITA-congress in Peking 1994

[14] Willmerding, G.; Trübswasser, F.; Häckh, J.: A simulation system to predict fuel consumption and emissions considering the traffic flow. 5. Aachener Kolloquium Fahrzeug- und Motorentechnik 1995. Tagungsband.

[18] Willmerding, G.; Dietzel, B.; Körner, T.: Rechnergestützte Entwicklung von Schaltprogrammen für Automatikgetriebe, 3. Stuttgarter Symposium Kraftfahrwesen und Verbrennungsmotoren 1999, Universität Stuttgart, Seite 843 - 856, ISBN-Nr. 3-8169-1751-8

[19] Willmerding G.: Vorhersage der Lebensdauer dynamisch belasteter Bauteile durch Kombination von Lebensdauerberechnung mit Finite Element Methode, Vortrag Nr. 14 auf der Tagung Fahrwerk-Tech 99 Adaptive Fahrwerksysteme, 4-5. März, München, Tagungsunterlagen TÜV-Akademie München.

[22] Willmerding, G; Häckh, J; Berthold, A:Driving Cycle, Load and Fatigue Life Predictions based on measured Route Data , Vortrag auf der ATT-Tagung in Barcelona 2001, SAE-Paper 01ATT120

[23] Häckh, J.; Willmerding, G.; Kley, M.; Binz, H.; Körner, T.: Rechnerische Lebensdauerabschätzung von Getriebegehäusen unter Einbeziehung realer multiaxialer Belastungen, DVM-Tagung Fulda vom 5. bis 6.6.2002, VDI-Berichte N2. 1689, 2002 Seite 303 - 317

[24] Körner, T.; Depping, H.; Häckh, J.; Willmerding, G.; Klos, W.: Rechnerische Lebensdauerabschätzung unter Berücksichtigung realer Belastungskollektive für die Hauptwelle eines Nutzfahrzeuggetriebes, DVM-Tagung Fulda vom 5. bis 6.6. 2002, VDI-Berichte N2. 1689, 2002 Seite 275 - 285

[25] Körner, T.; Depping, H.; Häckh, J.; Willmerding, G.: Fatigue Life Prognosis for Transmissions based on critical Component Spectrum, World Automotive Congress FISITA 2002, Helsinki, Paper Nr. F02V091

Available Configurations

These two versions are available:

• Standard configuration:
  In the standard configuration, winADAM is supplied with a GPS receiver with a sampling rate of 1 second.
• Extended version
  The advanced version uses a DGPS receiver with correction data sent via satellite. The position and speed are measured 10 times per second. A licence fee is required to use the satellite data.

USING STEINBEIS VEHICLES FOR MEASUREMENTS

Steinbeis owns 3 measurement vehicles of different powertrain configurations, which carry out measurements and road tests according to customer specifications.
A one-day measurement according to customer specifications including evaluation of the data costs:

RENTING WINADAM

The system can also be rented out on a daily basis.

PURCHASE PRICES

winADAM standard configuration including hardware and software without

After consultation with the customer, deviations and extensions are possible, for which a corresponding price surcharge is then levied. A fixed price offer will be provided in advance.