tyre parameter identification from road tests on a complete vehicle
DESCRIPTION
Tyre parameter identification from road tests on a complete vehicle. Dario Lo Conte, PME-EM. Outline. Centro Ricerche Fiat Problem description Introduction to optimization TyreEstimator Conclusions and recommendations. CRF. Centro Ricerche Fiat Part of Fiat Group 850 FTE Scope. - PowerPoint PPT PresentationTRANSCRIPT
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22-04-23
Challenge the future
DelftUniversity ofTechnology
Tyre parameter identification from road tests on a complete vehicleDario Lo Conte, PME-EM
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Outline
• Centro Ricerche Fiat• Problem description• Introduction to optimization• TyreEstimator• Conclusions and recommendations
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CRF
• Centro Ricerche Fiat• Part of Fiat Group• 850 FTE• Scope
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Problem description
• Experimental test data differs from vehicle model data
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Problem description
• Reasons• Different tyre testing conditions• Different measurement method
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Problem description
• Vehicle model
• Tyre model
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Problem description
Current approach• Validation suspension• Manual tuning of tyre parameters
• Drawbacks• Takes some days of work• Inconsistent
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Problem description
“To improve the characterization of tyres from road tests an application needs to be developed that automates the identification of tyre model parameters.”
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Optimization
• Making things better• Get the best out of a calculation• Generating more profit
Provides a systematic approach for problem solving
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Optimization
• Euclides
• Calculate derivative
• Objective function• Design variables• Constraints
( ) 20 (8 )f x x x
'( ) 2 8 04
f x xx
x
8-x
x
8-x
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Optimization
•Local/Global minima• Algorithms
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TyreEstimator1
Vehicle and tyre theory
2 Models
3 Manoeuvre
5 TyreEstimator
4 Measurements
6 Parameters
7 Optimization
8Considerations
9 Results
10 Conclusions and recommendations
Part I
Part II
Part III
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TyreEstimator
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TyreEstimator
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Kleurenbibliotheek
R 0G 64B 64
R 161G 0B 88
R 173G 198B 16
R 102G 188B 170
R 0G 43B 96
R 0G 147B 171
R 123G 160B 201
R 119G 192B 215
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Grafiekkop
1e Kwartaal2e Kwartaal3e Kwartaal4e Kwartaal
Grafiek subkop
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GrafiekkopGrafiek subkop
0102030405060708090
100
2007 2007 2008 2008
EastWestNorthSouth
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Grafiekkop
0
20
40
60
80
100
1st Qtr 2nd Qtr 3rd Qtr 4th Qtr
EastWestNorthSouth
Grafiek subkop
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