Thus, a calibration is needed to obtain good performance in orientation esti- mation. ... High variety of approaches to IMU sensor calibration exist. In most cases ...
Mercedes Benz Seat Occupant sensor emulator - Type1: not included. Can
emulate only ... Can emulate older (year 1997-2001) Mercedes Benz A-class
W168, C-class W202,. Vito W638, ML (with ... Renault Scenic wiring: 1 - +12V. 2 -
GND.
Mar 9, 2010 - unknown, e.g., due to refractive propagation paths. For this case, the .... a weighted alternating least squares (WALS) approach op- timizing ...
cal problems of accuracy in depth measurement occa- sionally ... technical problem we are focusing on by following the ..... [1] KINECT for Xbox 360, 2010.
mounted on a custom-built temperature-controlled test fixture consisting of an aluminum block containing a heater and a calibrated thermocouple. Screws (not.
Jul 6, 2017 - tion (pdf) of the associated parameters. The uncertainty is ...... [Ð0.92,Ð0.78]. [0.06, 0.17]. [0.93, 1.05]. Skewness. Ð1.2034. 0.7712. 0.0394 .... In metro- logical terms, it means that any effort directed towards an improvement of
LTD, the Dodge Diplomat, and the Chevrolet bolster, and steering column as a function of the. Impala. These cars were then retrofitted with crash pulse and ...
The simulation result of a 50kph MDB (Moving Deformable Barrier) impact .... Le, J., Chen, P., and Bauch, D., âDevelopment of CAE Simulated Crash Pulses for.
Nov 23, 2011 - the model to produce data which are similar to that collected from the ...... routines are established (and broken). Living ... tive targets such as laptop computers, multimedia ...... an offender's hard drive and notified police. The.
Environmental data are provided to simulate sensor readings. J-Sim [13]. Java-Sim began as a generic, open-source, component based, compositional network.
performance as well as general energy usage monitor- ing information. ... vides information regarding the spot general electric power consumption of the entire ...
Modeling and Simulation Center ... Scientific Decision Support Center ... Faruk Polat is an associate professor in the Department of Computer Engineering of ...
NS-2 can comfortably model wired network topologies up to 1,000 nodes or ... for a description of both), because of the advantage of native sensor code ...
Polytechnic University of Cartagena, Spain. Email: {esteban.egea, javier.vales, alejandros.martinez, pablo.pavon, joang.haro}@upct.es. â Corresponding author ...
Wireless Sensor Networks (WSN) are formed by a large ... particular type of Mobile Ad-hoc NETwork (MANET), formed ..... basically focus on free, open-source, simulation tools. 4.1. ... lack of models is being cut down by recent contributions.
the evaluation tools employed in on-going research on WSN. 2.1. Network model ... 1) Nodes: Each node is a physical device monitoring a set of physical ...
Wireless Sensor Networks (WSN) have been, and still are, a rich field for scientific activity. The immense advantages of WSNs in terms of mobility and flexibility ...
numbers, which are generally quieter, with noise levels increasingly restricted and an increase in demand for cars with quiet cabins, marks the need for ...
Dec 31, 2016 - [7] compared the suitability of five popular simulation tools for WSN planning .... QualNet packet tracer is a graphical packet trace analyzer .... ison is Packet delivery fraction(PDF), that is the ratio of total number ..... [13] J.
of calibration plane in the camera frame is acquired as: 01. =+ +. + ci ci ci zcybxa. (15). From (12) and (15), the intersection of beeline lj and pi can be determined ...
Feb 17, 2016 - using IBM SPSS Statistics software package (IBM SPSS Statistics 23, ... In the complex calibration method, the custom manual platform used for ...
the Ford Truck Service Manual which may be helpful to subsequent stage ... plus
150 lb for each designated seating position, and an additional allowance for ...
... AIRBAG ECU ? An airbag sensor has to be calibrated based on acceleration
signals. ... A new airbag sensor will be introduced in FH trucks and in the mean
time, some parts will be modified: ... influence of barrier position (height, angle…).
SIMULATION FOR AIRBAG SENSOR CALIBRATION Jérôme LAGRUT 2nd European HyperWorks Technology Conference
Volvo 3P AB VOLVO GROUP – Business Area Volvo Trucks
Buses
Renault Trucks
Mack Trucks
Volvo Penta
Volvo Aero
Volvo 3P Jerome LAGRUT EHTC 2008
Sept. 30 - Oct. 1
Nissan Diesel
2
Construction Equipment
Financial Services
Volvo 3P AB VOLVO GROUP – Corporate Values
QUALITY SAFETY ENVIRONMENT
Volvo 3P Jerome LAGRUT EHTC 2008
Sept. 30 - Oct. 1
3
Volvo 3P AB VOLVO GROUP – Corporate Values
QUALITY “Safety is – and must always be – the fundamental principle SAFETY of our design work-” Assar Gabrielsson and Gustaf Larson, founders of Volvo
ENVIRONMENT
Volvo 3P Jerome LAGRUT EHTC 2008
Sept. 30 - Oct. 1
4
Volvo 3P AIRBAG TEST
FM 30 km/h 0° TRAILER BACK
Volvo 3P Jerome LAGRUT EHTC 2008
Sept. 30 - Oct. 1
5
Volvo 3P AIRBAG CONTROL ECU Electronic Control Unit
NON FIRE
CRASH SITUATION
ECU FIRE
accelerations
algorithm
Volvo 3P Jerome LAGRUT EHTC 2008
Sept. 30 - Oct. 1
6
Volvo 3P HOW TO CALIBRATE AN AIRBAG ECU ?
TODAY = TESTS NON FIRE
accelerations
ECU
accelerations
FIRE algorithm
FUTURE = SIMULATION
Volvo 3P Jerome LAGRUT EHTC 2008
Sept. 30 - Oct. 1
7
Volvo 3P HOW TO CALIBRATE AN AIRBAG ECU ? An airbag sensor has to be calibrated based on acceleration signals. HIGH SPEED
HIGH SPEED
TEST 1
TEST 1
HIGH SPEED TEST 2
HIGH SPEED
Acceleration signals
TEST 2
HIGH SPEED TEST 3
DEVELOPMENT TESTS
LOW SPEED
Sensor
VERIFICATION
CALIBRATION
TESTS
TEST 1
LOW SPEED TEST 2
LOW SPEED TEST 3
R O S ER N SE PLI P U S
Jerome LAGRUT Sept. 30 - Oct. 1
TEST 3
LOW SPEED TEST 1
Volvo 3P EHTC 2008
HIGH SPEED
algorithm
8
LOW SPEED TEST 2
LOW SPEED TEST 3
Volvo 3P RESEARCH AND DEVELOPMENT PROJECT A two years research and development project has been done to define the simulation methodology:
• MESH GUIDELINES: recommendations for the mesh quality, mesh size (mesh class) and element formulation • TEST SENSOR ACCELERATION: frequency analysis to find the frequency spectrum that needs to be caught • FILTERING: cut off frequency and sampling rate have been set up to filter numerical noise and catch physical accelerations • SENSOR MODELING: recommendations to represent the sensors
Volvo 3P Jerome LAGRUT EHTC 2008
Sept. 30 - Oct. 1
9
Volvo 3P PROJECT APPLICATION: FH trucks A new airbag sensor will be introduced in FH trucks and in the mean time, some parts will be modified:
2007-2008: 1st application of airbag sensor calibration with simulation help in the VOLVO Group
Level of details needed in the models (pipes, tanks, brackets…) Material characteristics for crash application Rupture, tearing (welds, glue, bolts, sheet metal…) Model size: 64 bits workstations and software needed Model size : CPU time Test robustness
Volvo 3P Jerome LAGRUT EHTC 2008
Sept. 30 - Oct. 1
17
Volvo 3P CONCLUSIONS: CAE BENEFITS Many variants can be simulated (cab size, engine...) Details can be seen in simulation and not in test (transparent vehicle) The worst case scenario can be found by computation and influence the verification test configuration New test conditions can be tested (speed, angle...) Simulations will bring higher robustness to the algorithm Simulations can show how new introduced parts (eg Front lid in steel instead of plastic) will effect the sensor signal and the algorithm
Volvo 3P Jerome LAGRUT EHTC 2008
Sept. 30 - Oct. 1
18
Volvo 3P THANK YOU FOR YOUR ATTENTION
Volvo 3P Jerome LAGRUT EHTC 2008
Sept. 30 - Oct. 1
19
Volvo 3P BACKUP SLIDE: sampling rate If we need 10 sampling points per period and if we want to catch accelerations up to 1500 Hz we need a sampling frequency :
Tsamp
1 1 = = = 0.06ms 10ν 15/ ms
Volvo 3P Jerome LAGRUT EHTC 2008
Sept. 30 - Oct. 1
20
Volvo 3P BACKUP SLIDE: mesh size • We need 10 elements (10.lc) per wavelength (c.T = c/ν) for the highest frequency and the slowest (plastic) stress wave :
50mm/ms c = = 3.333mm lc ≤ 10ν 15/ ms • For thicknesses of 2.mm or less this is close to the mesh convergence requirement
