3d-method, requirement engineering · characteristics of the 3d parameter space ... matlab simulink...
TRANSCRIPT
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3D-Method, Requirement Engineering
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” by IfF
Customeruse
Requirement
Representative requirements
cover the whole range of customer use.
Customer use range
Requirement: range covered in the development process(design and testing)
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” by IfF
Customeruse
Representative requirements
cover the whole range of customer use.
Customer use range
Requirement: range covered in the development process(design and testing)
Requirementoptimum, representativerequirements
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” by IfF
Requirement Engineering
• Chassis• Drivetrain• Body• ADAS
• Energy consumption
• Range• Performance• Costs• Comfort• …
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HIC
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• ICE• El. motor• Battery• Loungemodul
• Powerelectronics
• Transmission• Propshaft• Axle drive• Steering• Brake• Wheels• Subframe• Suspension• …
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AS
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LIE
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• Link arm• Wheel hub• Damper• Spring• …• Gear-wheel• Clutch• Bearing• Shaft• Joint• …• Battery-Management
• Powertraincontrol strategy
• …• Energy-Management
• Thermo-Management
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• Chassis• Drivetrain• Body• ADAS
• Power consumption
• Tank range• Performance• Costs• Comfort• …
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HIC
LE
• ICE• El. Machine• Battery• Startingmodul
• Powerelectronics
• Transmission• Propshaft• Axle drive• Steering• Brake• Wheels• Subframe• Suspension• …
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AS
SE
MB
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• Link arm• Wheel hub• Damper• Spring• …• Gear-wheel• Clutch• Lager• Shaft• Joint• …• Battery-Management
• Controlstrategy• …• Energy-Management
• Thermo-Management
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Requirement Engineering
• Basis of development: Specification book 1 Requirement catalogue 1
Which features related to function and durability have to be fulfilled by components, modules, systems and the overall vehicle?
• Basis of design and testing: Specification book 2 Requirement catalogue 2
Which driving maneuvers, function- and load spectras occur in customer operation?
Which of them are representative for the regarded components, modules, systems and the overall vehicle and therefore have to be considered in the development process?
All requirements are connected with the characteristics of the 3D parameter space
Driver Driving environs Driven vehicle
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” by IfF
Development of 3D-Method, Parameter Choice
Driver FahrerDriving style • Mild• Average
• Sporty
Driving environs Environs Road profile quality
• Urban• Extra urban
• Highway
• Mountain
Driven vehicle Vehicles of different segments and loadings
• Light load• Average load• Full load• Trailer
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3D-Method: Choice of the Driver
Possibletest drivers
Vehicle withBlackbox
Measuring parameters related to driver actions and environs
Evaluation-drives
Urban Extra urban Highway Mountain
EvaluationAcceleration (longitudinal, lateral), Velocity, Steering, etc.
Identification of driving style
Mild Average Sporty
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” by IfF
Hamburg
Ruhrgebiet(Dortmund)
BraunschweigHannover
Regensburg
Würzburg
Magdeburg
Bad Pyrmont
Hof
Kassel
Berlin
Leipzig
Startpunkt
Hamburg
Ruhrgebiet(Dortmund)
BraunschweigHannover
Regensburg
Würzburg
Magdeburg
Bad Pyrmont
Hof
Kassel
Berlin
Leipzig
Startpunkt
3D-Method: Choice of the Driving environs
Urban
Extra urban
Mountain
& Highway
Hamburg, Berlin, Munich, Brunswick, Peking, Shanghai, Changchun etc. schedule: Istanbul, London, Tokyo,Mumbai, New-Dehli
D, EU, Poland, Latvia, Lithuania, China, schedule: USA, Turkey, Inda, Japan
Alps (D, A, CH), Highlands (Harz)
Stochastic Roughness
Transient Roughness MisuseRoad Profile
Measuring
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3D-Method: Choosen driven vehicles
Weight-to-Power Ratio [kg/kW]:
7…99…1111..1313…1515…17> 17
900 1300 1700 2100 2500Vehicle mass [kg]
100
200
300
400
500
600To
rque
[Nm
]
Measurement signals
• Driver throttle, break preasure, steering wheel angle, gear, clutch
• Driven Torque and forces, Vehicle translation and rotation
• Driving curvature, road gradient,environs road roughness, tempature
Data Base50.0000-70.000 km per Vehicle
• Conventional drivetrains• Hybrid drivetrains • Electrical drivetrains • Front, rear and
all wheel drive• different Transmissions
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3D-Method: Measurement program
Driver
Urban
Extra urban
Highway
Mountain
light average full trailer
mild average sporty
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” by IfF
mild average sporty
light average full trailer
light average full trailer
light average full trailer
light average full trailer
• Delivery service • Postal service• Special incidents• Misuse• …
Special customers
3D-Method: Measurement program
900 1300 1700 2100 2500Vehicle mass [kg]
100
200
300
400
500
600Torq
ue
[Nm
]
900 1300 1700 2100 2500Vehicle mass [kg]
100
200
300
400
500
600Torq
ue
[Nm
]
Urban
Extra urban
Highway
Mountain
light average full trailer
Urban
Extra urban
Highway
Mountain
light average full trailer
Driver
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” by IfF900 1300 1700 2100 2500
Vehicle mass [kg]
100
200
300
400
500
600Torq
ue
[Nm
]
900 1300 1700 2100 2500Vehicle mass [kg]
100
200
300
400
500
600Torq
ue
[Nm
]
light average full trailer
light average full trailer
light average full trailer
light average full trailer
SimulationMOVE3D
• Delivery service • Postal service• Special incidents• Misuse• …
Special customers
3D-Method: Measurement program
Urban
Extra urban
Highway
Mountain
light average full trailer
Urban
Extra urban
Highway
Mountain
light average full trailer
mild average sportyDriver
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” by IfF
Driver model
Driving environs model
Driven vehicle
Modulare Variantenbasierte Entwicklungsplattform für 3F-Simulationen (MOVE 3D)(Modular development platform based on variants for 3D simulations)
• Simulation environment based onMatlab Simulink
• Different drive lines (front wheel drive, rear wheel drive, …) with various transmission types (MT, AT, …)
• Tailored implementation of simulation programmes as Dymola
Simulation environment
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” by IfF
3D-Method: Driver model *)
Driver actions
• Throttle (acceleration)• Break preasure (deceleration)
• Driving speed
• Gear shift, clutch (MT)
• Steering (lateral acceleration)
*) problem specific modelling; regarding the natural statistical variance
1 3 5
2 4 R
Driven vehicle
• Segment (small … big)
• Vehicle loading (light,
average, full, trailer)
• Engine power (M-n)
• Transmission
Driving environs
• Environs- Urban- Extra urban- Highway- Mountain
• Road profile - Gradient/curvature- Unevenness, potholes
• Traffic & Temperature
Depending on
Driving style
• mild
• average
• sporty
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” by IfF
3D-Method: Driving environs - Models *)
Coverage of environs parameters forurban, extra urban, highway and mountain
• Traffic parameter- Driving speeds, incl. Stop&Go
- Acceleration sections
- Deceleration sections
- vehicle-spacing
- …
• Road profile parameter- Gradient, curvature
- Road profiles (periodic,
stochastic, transiente),
potholes, sleeping policemen,
railway crossing, …
- friction factor
• Weather data- Temperature
- Sight distance*) problem specific modelling; regarding the natural statistical variance
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3D-Method: Driven vehicle model *)
Consideration of function and durability behaviour of
• Elements, parts• Assemblies/modules
• Overall vehicle
For regarding the topics
• Drivetrain• Chassis
• Body
• ADAS
MBS-Models
*) problem specific modelling; regarding the natural statistical variance
Two track models
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” by IfF
Characteristics of the 3D Method and MOVE3D
• Virtual measurement and testing program in 3D parameter space
• Consideration of natural statistical variance of the characteristics of- Driver- Driving environs- Driven vehicle
• Acquisition of all representative driving maneuvres and parameters inthe time domain and/or as histograms
EWPStadtLandBABBerg
EWPStadtLandBABBerg
10002000
30004000
0100
200300
012
x 105EWP
nmot [1/min]Mgetr,ein [Nm] 1000
20003000
4000
0100
200300
012
x 105L_sc_M
nmot [1/min]Mgetr,ein [Nm]
Load spectra Percentage of gears
Load factors Engine operating points
3D-Cube
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” by IfF
3D-Method: Benefit
Evaluation, optimization of 3D paramters
optimalDesign
DevelopmentFunctionDurability
Determination of represen-tative requirements• representative drivingmaneuvres
• Load spectras• Histograms for function parameters
• Chassis• Drivetrain• Body• ADAS
• Energy consumption
• Range• Performance• Costs• Comfort• …
VE
HIC
LE
• ICE• El. motor• Battery• Loungemodul
• Powerelectronics
• Transmission• Propshaft• Axle drive• Steering• Brake• Wheels• Subframe• Suspension• …
MO
DU
LE
S /
AS
SE
MB
LIE
S
• Link arm• Wheel hub• Damper• Spring• …• Gear-wheel• Clutch• Bearing• Shaft• Joint• …• Battery-Management
• Powertraincontrol strategy
• …• Energy-Management
• Thermo-Management
FU
NC
TIO
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3D-Method, Requirement Engineering
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