EP3011486A1 - Method of modelling a tyre in running conditions at a predefined speed - Google Patents
Method of modelling a tyre in running conditions at a predefined speedInfo
- Publication number
- EP3011486A1 EP3011486A1 EP14759016.0A EP14759016A EP3011486A1 EP 3011486 A1 EP3011486 A1 EP 3011486A1 EP 14759016 A EP14759016 A EP 14759016A EP 3011486 A1 EP3011486 A1 EP 3011486A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tire
- torque
- vehicle
- load
- generated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C99/00—Subject matter not provided for in other groups of this subclass
- B60C99/006—Computer aided tyre design or simulation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/15—Vehicle, aircraft or watercraft design
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2111/00—Details relating to CAD techniques
- G06F2111/10—Numerical modelling
Definitions
- the present invention relates to a method for modeling a tire in a rolling situation at a given speed and more specifically to a method comprising modeling the tilt torque exerted on the tire.
- the present invention also relates to a computer program product comprising program code instructions for implementing the aforementioned modeling method.
- the present invention relates to a real-time stabilization system of a vehicle comprising tire modeling means implementing the mentioned modeling method.
- the simulation tools require descriptive models of the behavior of the tires.
- reference actions in a turn correspond to the load transfer of the vehicle and to the variation of the crushed radius associated with this load, to the roll-induced inducing of the camber, and to the necessity of generating a force via a drift angle tap.
- Mx R. o 1 F ⁇ 'i Qsxi' ⁇ ⁇ Vmx
- R 0 is the free radius of the tire
- F z is the vertical load on the tire
- q Sxl is the coefficient of dependence linear to the load
- a Vmx is the scale factor associated with q Sxl
- Sx2 is the camber dependence coefficient
- y is the camber angle, sometimes also camber
- q Sx3 is the lateral force dependence coefficient
- F y is the transverse thrust force exerted on the tire
- F z0 is the reference load of the tire
- ⁇ ⁇ is the overall scale factor.
- the object of the present invention is to propose a method for modeling a tire in a rolling situation that includes modeling the tilting torque Mx exerted on the tire with improved precision.
- a method of modeling a tire under rolling conditions at a predetermined speed includes modeling the tilt torque exerted on the tire in which the tilting torque is the sum of at least:
- the tire having a drift angle and an inflation pressure
- the torque generated by the ground reaction is a function of the vehicle load, the speed, the camber angle, drift angle and inflation pressure.
- the torque generated by the ground reaction is calculated by the following formula:
- a torque generated by the reaction of the ground under the load decentered by the reference point by the transverse thrust force where Mx 31 , Mx 32 , Mx 33 , Mx 34 , Mx 35 , Mx 36 , Mx 37 and Mx 38 are predetermined coefficients, F z represents the vehicle load, y represents the camber angle, ⁇ represents the drift angle, V represents the speed and P represents the inflation pressure.
- the coefficients Mx 31 , Mx 32 , Mx 33 , Mx 34 , Mx 35 , Mx 36 , Mx 37 and Mx 38 are determined in a preliminary step comprising: • a substep of measurements on a tire bench; then
- the modeling method of the invention may be used to determine the behavior of a vehicle comprising the tire modeled thereby, and preferably to determine the behavior of the overturning vehicle.
- a computer program product downloadable from a communication network and / or recorded on a computer readable and / or executable medium by a processor, includes program code instructions for the implementation of the modeling process above.
- a real-time stabilization system of a vehicle comprising a tire comprises means for modeling the tire implementing the modeling method above.
- FIG. 1 represents the torque generated by the offset of the load of the vehicle by the camber angle
- FIG. 2 represents the torque generated by the transverse thrust force
- FIG. 3 represents the torque generated by the reaction of the ground under the load decentered by the reference point by the transverse thrust force
- FIG. 4 represents a comparison diagram between the measured switching torque Mx and the switching torque model Mx of the formulation MF-5.2 and the model of the switching torque Mx used in the modeling method according to an embodiment of FIG. the invention. Modes of realization
- the present embodiment relates in the first place to a method of modeling a tire under rolling conditions at a predetermined speed.
- the tire is subjected to a downward representative load F z of a vehicle and to a transverse thrust force F y .
- the tire is inclined relative to the vertical of a camber angle y.
- the method comprises modeling the tilting torque Mx exerted on the tire in which the tilting torque Mx is the sum of at least:
- the modeling of the Mx tilt torque exerted on a tire of the modeling method described above has an improved precision with regard to the precision presented by the formulation MF-5.2 of the prior art because the modeling the Mx tilting torque better integrates the effects of the Mx 3 torque, namely the torque created by the off-center reaction of the ground, the effects of the internal temperature of the tire and the surface temperature of the tire, as well as those of the speed of the tire. vehicle, the tire inflation pressure and the transverse force of the vehicle.
- the modeling of the tilting torque Mx exerted on the tire is performed under the typical conditions encountered on a vehicle comprising this tire.
- these typical conditions cover a wide range of uses of the tire, such as, for example, the rolling of the tire in a straight line or the high-speed running on a circuit or the safety maneuvers.
- Figure 1 illustrates the torque Mx 1 generated by the offset vehicle load by the camber angle.
- Figure 1 illustrates the couple
- Figure 1 illustrates the camber angle y which represents the angle formed by the running surface of the vehicle. pneumatic with the vertical and the crushed radius R e which represents the distance between the reference point C of the tire and the point of contact of the tire W with the ground.
- Figure 2 illustrates the torque Mx 2 generated by the transverse thrust force. Particularly, Figure 2 illustrates the torque Mx 2 generated at the contact point of the tire W with the ground when a transverse thrust force F is exerted on the reference point C of the tire. In addition, Figure 2 illustrates the load F z exerted on the reference point C of the tire.
- Figure 3 illustrates the torque Mx 3 generated by the ground reaction F R under load F z . It should be noted that the vertical component of the ground reaction F R is off-center of the reference point C of the tire by the transverse thrust force F is exerted on the reference point C of the tire. Figure 3 illustrates the point D of the tire on which the reaction of soil F R off-center is exerted.
- the torque Mx 3 is a function of the load F z of the vehicle, the speed (V) of the vehicle, the camber angle y, the drift angle ⁇ and the inflation pressure P.
- the drift angle is the angle formed by the intersection of the plane of the ground with the wheel plane relative to the vector of the speed.
- the Mx 3 pair generated by the soil reaction is calculated by the formula
- Mx 31, 32 Mx, Mx 33, 34 Mx, Mx 35, 36 Mx, Mx and Mx 37 38 are predetermined coefficients
- F z is the charge of the vehicle
- y is the angle of camber
- ⁇ represents the drift angle
- V represents the speed
- P represents the inflation pressure
- the coefficients Mx 31 , Mx 32 , Mx 33 , Mx 34 , Mx 35 , Mx 36 , Mx 37 and Mx 38 are determined during a preliminary stage of the modeling process comprising a sub-step of bench-based measurements (for example ground plane-type rolling machine) of said tire and an iterative adjustment sub-step of the coefficients until the model reproduces the measurements to a predetermined error margin.
- bench-based measurements for example ground plane-type rolling machine
- Figure 4 illustrates a comparison diagram between the Mx tilt torque measured on a bench, the Mx tilt torque model of the above-mentioned MF-5.2 formulation and the model of the Mx tilt torque used in the modeling process described above.
- the modeling method of the invention can be used to determine the behavior of a vehicle comprising the tire modeled thereby.
- the described modeling method can be used to determine the reversing behavior of the vehicle.
- the method is implemented by a computer program product downloadable from a communication network and / or recorded on a computer readable and / or executable medium by a processor, including program code.
- the method may be integrated into a real-time stabilization system of a vehicle comprising a tire modeled as described above.
- the driver assistance system can more accurately determine the reversal torque and thus more effectively implement anti-rollover measures.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Geometry (AREA)
- General Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Evolutionary Computation (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Aviation & Aerospace Engineering (AREA)
- Computational Mathematics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
- Tires In General (AREA)
- Control Of Driving Devices And Active Controlling Of Vehicle (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1357693A FR3009402B1 (en) | 2013-08-02 | 2013-08-02 | METHOD FOR MODELING A TIRE IN ROLLING SITUATION AT A DETERMINED SPEED |
PCT/FR2014/051916 WO2015015097A1 (en) | 2013-08-02 | 2014-07-23 | Method of modelling a tyre in running conditions at a predefined speed |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3011486A1 true EP3011486A1 (en) | 2016-04-27 |
Family
ID=49713194
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14759016.0A Withdrawn EP3011486A1 (en) | 2013-08-02 | 2014-07-23 | Method of modelling a tyre in running conditions at a predefined speed |
Country Status (7)
Country | Link |
---|---|
US (1) | US20160207366A1 (en) |
EP (1) | EP3011486A1 (en) |
JP (1) | JP6260701B2 (en) |
KR (1) | KR101829695B1 (en) |
CN (1) | CN105408901B (en) |
FR (1) | FR3009402B1 (en) |
WO (1) | WO2015015097A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106446430B (en) * | 2016-09-30 | 2019-06-04 | 长安大学 | A kind of semitrailer bend is overtaken other vehicles risk analysis method |
KR101959723B1 (en) | 2018-11-21 | 2019-03-19 | 김동철 | Drift prevention tire |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4710261B2 (en) * | 2004-06-30 | 2011-06-29 | 横浜ゴム株式会社 | Method for operating tire behavior simulation processing device |
JP2006298209A (en) * | 2005-04-21 | 2006-11-02 | Advics:Kk | Vehicle roll increase trend determination device and vehicle motion stabilization controller using the same |
JP5560677B2 (en) * | 2009-11-30 | 2014-07-30 | 横浜ゴム株式会社 | Tire lateral force calculation method and apparatus, tire stiffness parameter value extraction method and apparatus, tire characteristic calculation method and apparatus, tire design method, vehicle motion analysis method, and program |
CN102529960B (en) * | 2012-02-15 | 2015-04-15 | 三一汽车制造有限公司 | Control method and control system for preventing side overturn and mixing transport vehicle |
CN103213582B (en) * | 2013-04-18 | 2016-08-24 | 上海理工大学 | Anti-rollover pre-warning and control method based on body roll angular estimation |
-
2013
- 2013-08-02 FR FR1357693A patent/FR3009402B1/en not_active Expired - Fee Related
-
2014
- 2014-07-23 EP EP14759016.0A patent/EP3011486A1/en not_active Withdrawn
- 2014-07-23 US US14/909,500 patent/US20160207366A1/en not_active Abandoned
- 2014-07-23 KR KR1020167004984A patent/KR101829695B1/en active IP Right Grant
- 2014-07-23 CN CN201480042585.1A patent/CN105408901B/en active Active
- 2014-07-23 WO PCT/FR2014/051916 patent/WO2015015097A1/en active Application Filing
- 2014-07-23 JP JP2016530577A patent/JP6260701B2/en not_active Expired - Fee Related
Non-Patent Citations (2)
Title |
---|
None * |
See also references of WO2015015097A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2015015097A1 (en) | 2015-02-05 |
US20160207366A1 (en) | 2016-07-21 |
KR101829695B1 (en) | 2018-02-23 |
JP2016537247A (en) | 2016-12-01 |
FR3009402A1 (en) | 2015-02-06 |
CN105408901A (en) | 2016-03-16 |
KR20160036052A (en) | 2016-04-01 |
JP6260701B2 (en) | 2018-01-17 |
CN105408901B (en) | 2018-08-28 |
FR3009402B1 (en) | 2016-12-09 |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN |
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