CN104217047B - A kind of method for making automobile steering front wheel enveloping surface - Google Patents
A kind of method for making automobile steering front wheel enveloping surface Download PDFInfo
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- CN104217047B CN104217047B CN201310220491.6A CN201310220491A CN104217047B CN 104217047 B CN104217047 B CN 104217047B CN 201310220491 A CN201310220491 A CN 201310220491A CN 104217047 B CN104217047 B CN 104217047B
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Abstract
The present invention provides a kind of method for making automobile steering front wheel enveloping surface, including：Final coupled relation curve is jumped and turned to according to the wheel of the automobile steering front wheel, generates the movement locus file of the steering front wheel；According to selected formulation wheel tyre model, the static models of tyre contour outline are made；Set up a motion simulation model for comprising only the wheel contour, corresponding coordinate value on the wheel tyre profile is set to change according to geometric locus in the movement locus file of the steering front wheel, make to carry out simulating sports described in wheel, enveloping solid is carried out to its space to scan, and obtains the motion envelope face of the wheel.The enveloping surface that the present invention is obtained has very high reliability and security, and can improve design efficiency, reduces design risk and development cost.
Description
Technical field
The present invention relates to automobile technical field, more particularly to a kind of method for making automobile steering front wheel enveloping surface.
Background technology
The wheel movement enveloping surface of automobile, refers under the various driving cycles of vehicle, wheel with suspension bob simultaneously
During divertical motion to each extreme position, the space occupied by wheel tyre.It determines Wheel casing and the wing
Daughter board hole shape, while can also be used to check wheel and periphery subsystem and the dynamic clearance and movement interference feelings of parts
Condition, or even it is also possible to drive the adjustment of Wheel centre distance, vehicle min. turning radius in the exploitation of vehicle framework etc..Therefore, whole
The development phase of car project, more accurate wheel bag is designed in appropriate exploitation node analysis, for reduction design risk, reduced
Late design change, shortening construction cycle and reduction development cost suffer from important function and significance.
The motion envelope face of wheel is decided by the movement mechanism of wheel, and its influence factor includes：The topology knot of suspension system
Structure（Suspension type）, geometry（Suspension system hard spot）, the wheel of wheel jumps and turns to relation, wheel alignment parameter, tyre type
Number, tire static profile standard and snow chain application strategy etc..
At present, motion of the automobile engineer in the exploitation design phase generally using simulation software to suspension system is emulated
Analysis, simulation calculates wheel and jumps motion and shared sky during around the divertical motion that main pin axis rotate in the wheel of vertical direction
Between, and make with this wheel envelope.However, in suspension systems, damper top, lower control arm and vehicle body are by rubber
What bushing was connected, be a flexible multibody.But in general Suspension movement emulation, usually using simple rigid body kinematics
Model, have ignored in system due to mechanism displacement caused by the flexible member stress deformation such as rubber bushing, it is impossible to accurate simulation
Go out the movement locus of wheel, the wheel inclusion fruit of gained can not be consistent with actual conditions well.
Therefore, not yet have at present can accurate simulation go out wheel trace generation wheel movement enveloping surface method.
The content of the invention
The technical problems to be solved by the invention are that the present invention proposes a kind of side for making automobile steering front wheel enveloping surface
Method, it can reflect the accurate movement locus of wheel, and make the wheel enveloping surface of generation smooth complete.
In order to solve the above-mentioned technical problem, the one side of the embodiment of the present invention provides a kind of making automobile steering front wheel envelope
The method in face, comprises the following steps：
Jumped according to the wheel of the automobile steering front wheel and turn to final coupled relation curve, it is soft by the first Kinematics Simulation
Part carries out tire enveloping surface simulation analysis, generates the movement locus file of the steering front wheel；
According to selected formulation wheel tyre model, the static models of tyre contour outline are made；Further comprise：Make described
The static models of tyre contour outline of the tire under general operating mode, damped condition and accelerating mode；
According to the static models of made wheel tyre profile, in the second kinematics simulation software, one is set up only
Motion simulation model containing the wheel contour, and fixed coordinate system is set up according to entire vehicle design requirement, its coordinate origin
And change in coordinate axis direction is identical with vehicle setting；
Appropriate kinematic pair and driving are created on wheel, makes the pose of wheel completely by wheel center point and axis
The coordinate value of upper fixing point is determined；
Editor's motion rule curve, makes corresponding coordinate value on the wheel tyre profile according to the fortune of the steering front wheel
Geometric locus changes in dynamic trail file, the wheel is carried out simulating sports, and carrying out enveloping solid to its space scans, and obtains
Obtain the motion envelope face of the wheel；
Wherein, the static models of tyre contour outline of the making tire under general operating mode are specially：
The tire cross-section shape graph of a certain model is obtained according to ETRTO standards, by the wheel tire cross-section shape around center
Line rotates a circle, and obtains the static models of the tyre contour outline；
The static models of the tyre contour outline under damped condition that makes the tire are specially：
The tire cross-section shape graph of a certain model is obtained according to ETRTO standards；
Using wheel center line as axis, the tire cross-section shape is rotated 180 ° from Y-axis positive direction to Y-axis negative direction
Form the Part I of tire model final size；
One radial-deformation formation axis P is translated along X-coordinate positive direction with wheel center line, using P as axis, tire cut
Face rotates the Part II of 180 ° of formation tire model final sizes from Y-axis positive direction to Y-axis negative direction；
Tire cross-section is moved at P from centerline, the Part III of tire model final size is formed；
It is partially synthetic described three, just obtain the static models of the tyre contour outline under damped condition.
Wherein, the static models of tyre contour outline of the making tire under accelerating mode are specially：
The tire cross-section shape graph of a certain model is obtained according to ETRTO standards；
Using wheel center line as axis, the tire cross-section shape is rotated 180 ° from Y-axis positive direction to Y-axis negative direction
Form the Part I of tire model final size；
One radial-deformation formation axis P is translated along X-axis negative direction with wheel center line, using P as axis, by tire cross-section
The Part II of 180 ° of formation tire model final sizes is rotated from Y-axis positive direction to Y-axis negative direction；
Tire cross-section is moved at P from centerline, the Part III of tire model final size is formed；
It is partially synthetic described three, just obtain the static models of the tyre contour outline under damped condition.
Wherein, the final coupled relation curve include multiple coordinate points, each coordinate points include wheel slip a line journey join
Number and steering rack travel parameters.
Wherein, the movement locus file of the steering front wheel at least includes：Each moment during emulation experiment, institute
State solid for one with core wheel distance on x, the y of the wheel center point of steering front wheel, the movement locus of z coordinate, and wheel axis
The x of the certain point of definite value, y, the movement locus of z coordinate.
Wherein, it is described to make corresponding coordinate value on the wheel tyre profile literary according to the movement locus of the steering front wheel
The step of geometric locus changes in part be specially：
At least make on the x of the static models central point of the wheel contour, y, z coordinate value and axis with central point away from
From the x of any for a fixed value, z coordinate value is transported according to the corresponding track in the movement locus file of the steering front wheel respectively
It is dynamic.
Wherein, further comprise：
According to the tire enveloping surface of made automobile steering front wheel, the interference for simulating it with the tire periphery part is closed
System.
Wherein, first kinematics simulation software is ADAMS/Car softwares；Second kinematics simulation software is
CATIA/DMU softwares.
Implement the present invention, with following beneficial effect：
In embodiments of the present invention, the motion only coordinate motion of any on wheel disk coordinate and axis of wheel
Track is determined.Compared with prior art, the motion of wheel is no longer dependent on the motion of suspension and steering mechanism.Therefore, using this
Technical scheme makes wheel enveloping surface, it is only necessary to which all vehicles can be just applied to by setting up a kinematics model of wheel, no
Need to input suspension geometry topological structure and hard spot information of vehicle etc., substantially increase operating efficiency；
The motion envelope face obtained by this method, its result has considered mechanism bullet of the automobile under complex working condition
Property deformation, the manufacture of tire and use the factor such as error.The wheel enveloping surface obtained using this method, can measure and check car
The gap of wheel and its Surrounding Parts especially wheel cover, acquired results have very high reliability and security, solve simple
Rigid model is emulated and the larger problem of real train test error, is reduced design risk, is shortened the vehicle project development cycle,
Reduce automobile research cost.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is a kind of main flow chart for method for making automobile steering front wheel enveloping surface that the present invention is provided；
During Fig. 2 is the steering front wheel obtained in a kind of method for making automobile steering front wheel enveloping surface for providing of the present invention
The movement locus schematic diagram of heart point X-coordinate；
During Fig. 3 is the steering front wheel obtained in a kind of method for making automobile steering front wheel enveloping surface for providing of the present invention
The movement locus schematic diagram of heart point Y-coordinate；
During Fig. 4 is the steering front wheel obtained in a kind of method for making automobile steering front wheel enveloping surface for providing of the present invention
The movement locus schematic diagram of heart point Z coordinate；
During Fig. 5 is the steering front wheel obtained in a kind of method for making automobile steering front wheel enveloping surface for providing of the present invention
The movement locus schematic diagram of certain fixing point X-coordinate on axis；
During Fig. 6 is the steering front wheel obtained in a kind of method for making automobile steering front wheel enveloping surface for providing of the present invention
The movement locus schematic diagram of certain fixing point Y-coordinate on axis；
During Fig. 7 is the steering front wheel obtained in a kind of method for making automobile steering front wheel enveloping surface for providing of the present invention
The movement locus schematic diagram of certain fixing point Z coordinate on axis；
Fig. 8 is the first tire used in a kind of method for making automobile steering front wheel enveloping surface for providing of the present invention
CAD model sectional view；
Fig. 9 is second of the tire used in a kind of method for making automobile steering front wheel enveloping surface for providing of the present invention
CAD model sectional view；
Figure 10 is the tire CAD that Fig. 9 is used in a kind of method for making automobile steering front wheel enveloping surface for providing of the present invention
The outline drawing of wheel under the special operation condition that model sectional view is obtained；
Figure 11 is obtained in one embodiment of a kind of method for making automobile steering front wheel enveloping surface that the present invention is provided
The flow chart of final coupled relation curve；
Figure 12 is the suspension of one embodiment in a kind of method for making automobile steering front wheel enveloping surface that the present invention is provided
The schematic diagram of Roof figures；
Figure 13 is a kind of front vehicle wheel of vehicle in a kind of method for making automobile steering front wheel enveloping surface that the present invention is provided
Roof is intended to；
Figure 14 be in a kind of method for making automobile steering front wheel enveloping surface for providing of the present invention a kind of vehicle in special work
Steering front wheel Roof under condition is intended to；
Figure 15 is the steering front wheel obtained in a kind of method for making automobile steering front wheel enveloping surface that the present invention is provided
Enveloping surface schematic diagram.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
As shown in figure 1, being a kind of main flow chart for method for making automobile steering front wheel enveloping surface that the present invention is provided；Its
Comprise the following steps：
Step S10：Jumped according to the wheel for the automobile steering front wheel being obtained ahead of time and turn to final coupled relation curve, by the
One kinematics simulation software carries out tire enveloping surface simulation analysis, generates the movement locus file of the steering front wheel, wherein, this is most
Whole coupled relation curve includes multiple coordinate points, wherein each coordinate points, which include wheel, jumps travel parameters and steering rack stroke ginseng
A kind of final coupled relation curve is shown in number, Figure 13, will hereinafter on how to obtain the final coupled relation curve
Carry out detailed narration.
Final coupled relation curve is jumped and turned to according to the automotive wheel wheel, can be exported by dynamics simulation software
Front steering tire movement locus file.In dynamics simulation software（Such as Adams/Car）Middle progress tire enveloping surface（Wheel
Envelope）Simulation analysis.By the emulation, the movement locus file of wheel can be generated.Those movement locus files include
It is with core wheel distance in each moment during emulation experiment, the x of wheel center point, y, z coordinate and wheel axis
The x of any of one fixed value, y, the movement locus of z coordinate a, example of the movement locus of six coordinates can be found in Fig. 2 extremely
Shown in Fig. 7.
Step S12：According to the model of selected formulation wheel tyre, tire CAD model is made；
Specifically, including：Needs are used according to automobile, suitable wheel tyre model is selected；Make tire CAD model.
Specifically, in one embodiment, using European tyre technical organization（TRTO European Tyre and Rim
Technical Organization, ETRTO）Standard makes the CAD model of tire.Wherein, each dimensional parameters are all in accordance with selected
Tyre model is consulted ETRTO-2010 standards and obtained.In the standard, the maximum appearance and size in tire model section is most ambassador
With size, the deformation quantity produced when being and normally being used comprising wheel and tire maximum allowance value both ensure that and taken into full account respectively
The factors such as the foozle of supplier of family, and not Redundancy Design.Specific modeling method is referring to the standards of ETRTO -2010.Fig. 8 and figure
9 show the cross sectional shape of two kinds of tires, wherein, the parameter in tire cross-section in Fig. 8 meets A+2（Bmax+4）>=sG, and scheme
The parameter in tire cross-section in 9 meets A+2（Bmax+4）<= sG.Tire cross-section shape in Fig. 8 or Fig. 9 is revolved around center line
Circle, just obtained the CAD model of tire.
In addition, brake or accelerate etc. under special operation condition, it is necessary in the case of considering to brake and accelerating wheel radial deformation
Amount.Wherein, radial-deformation refers to wheel under the influence of by ground force and suspension flexible member stress deformation, car
Displacement of the central point in radial direction is taken turns, that is, along the displacement of X-axis positive direction or X-axis negative direction.As shown in Figure 10, it is this hair
Obtained in a kind of method for making automobile steering front wheel enveloping surface of bright offer using Fig. 9 tire CAD model sectional view
The outline drawing of wheel under special operation condition；The CAD model of the profile of wheel is obtained in the following way：
With wheel center line（C.R.）For axis, by tire cross-section as shown in Figure 9 from A points（From Y-axis positive direction）To B
Point（Y-axis negative direction）The Part I of 180 ° of formation tire model final sizes of rotation；Under damped condition, with wheel center
Line（C.R.）A radial-deformation is translated along X-axis positive direction（N millimeters）Axis P is formed, using P as axis, by tire cross-section from C points
（From Y-axis positive direction）To D points（Y-axis negative direction）The Part II of 180 ° of formation tire model final sizes of rotation；Accelerating
Under operating mode, axis P is then formed by wheel axis along X-axis negative direction translation radial-deformation, and same using P as axis, will be taken turns
Tire section is from C points（From Y-axis positive direction）To D points（Y-axis negative direction）The second of 180 ° of formation tire model final sizes of rotation
Part；By tire cross-section from center line（C.R.）Place is moved at P, forms the Part III of tire model final size；Finally,
This is three partially synthetic, just braked（Or accelerate）Wheel CAD model under operating mode.Wherein, in one embodiment, should
Tire radial-deformation is 10mm, and it is an empirical value, it is to be understood that can also determine that this becomes according to CAE simulation results
Shape amount.
Step S14：According to the static models of the wheel contour, and the fortune association trail file of steering front wheel is combined, made
Wheel movement enveloping surface：
Due to having been obtained for the static CAD model of wheel contour in step s 12, in kinematics simulation software（Such as
CATIA/DMU）In module, a motion simulation model for comprising only wheel contour is set up, and foundation is required according to entire vehicle design
Fixed coordinate system, its coordinate origin and change in coordinate axis direction are identical with vehicle setting.On three dimension kinematic analysis, wheel tool
There are 6 spatial movement frees degree.Rotary motion due to wheel tyre around its axis has no effect on the locus that it is occupied,
Therefore, the position of wheel at a time can be determined with posture by one group of array comprising 5 independent parameters, this 5 independences
Parameter includes solid for one with central point distance on x, the y by the obtained wheel center points of step S10, z coordinate value and axis
The x of any of definite value, z coordinate value.In kinematics simulation software（Such as CATIA/DMU）In module, created suitably on wheel
Kinematic pair and driving, determine the pose coordinate value of fixing point on wheel center point and axis completely of wheel.Editor
Rule curve is moved, makes on the static CAD model of the wheel contour corresponding coordinate value according to the track obtained by step S10
Curvilinear motion, with regard to wheel can be made to be moved according to the space tracking in the l-G simulation test in step S10, specifically, makes the wheel
With central point apart from a bit for a fixed value on x, the y of the static CAD model central point of profile, z coordinate value and axis
X, z coordinate value is respectively according to foregoing movement locus file（Fig. 2-Fig. 7）In track motion.To the fortune of the wheel contour
Dynamic space carries out enveloping solid and scanned（Swept Volume）, careful smooth wheel movement enveloping surface has just been obtained, such as Figure 15 institutes
Show.
In the technical scheme, only the Grid Track of any is determined on wheel disk and axis for the motion of wheel.With
Prior art is compared, and the motion of wheel is no longer dependent on the motion of suspension and steering mechanism.Therefore, made using the technical scheme
Wheel enveloping surface, it is only necessary to which all vehicles can be just applied to by setting up a kinematics model of wheel, it is not necessary to input vehicle
Suspension geometry topological structure and hard spot information etc., substantially increase operating efficiency.
After wheel movement enveloping surface is obtained, wheel and its Surrounding Parts can be checked using the tire motion enveloping surface
Gap.
Following combination Figure 11-Figure 14, illustrate the final coupling obtained in one embodiment of the invention in above-mentioned steps S10
Close the flow chart of relation curve.
As shown in figure 11, an a kind of reality of method for making automobile steering front wheel enveloping surface that the present invention is provided is shown
Apply the flow chart that final coupled relation curve is obtained in example；There it can be seen that it comprises the following steps：
Step S110：The first coupled relation curve is jumped and turned to the wheel for obtaining automobile steering front wheel, and first coupling is closed
It is that curve includes multiple coordinate points, each coordinate points include damper travel parameters and the first steering rack travel parameters, wherein,
The damper travel parameters of each coordinate points are the current stroke of damper and damper in the first coupled relation curve
The percentage of limit travel, the first steering rack travel parameters are the current stroke of steering rack and steering rack limit travel
Percentage, wherein damper travel parameters note as ordinate, the first steering rack travel parameters as abscissa, wherein,
The wheel of the automobile steering front wheel is jumped and turned to the first coupled relation curve and can be tested by advance to substantial amounts of sample car
Obtain；
Step S111：By dynamics simulation software, the wheel for obtaining the steering front wheel for considering elastic component deformation is jumped and turned to
Second coupled relation curve, the second coupled relation curve includes the coordinate corresponding with the first coupled relation curve
Point, and each coordinate points include wheel jump travel parameters and the second steering rack travel parameters, specifically, including：
The front suspension system simulation model of the automobile is set up by dynamics simulation software, the several of suspension system are contained
What topological structure, and bushing connection and stiffness characteristics, the connection include ball pivot or rubber bushing；
Motion simulation is carried out to the front suspension system of the automobile, and the motion path of suspension is included multiple coordinate points,
It is corresponded with the coordinate points in the first coupled relation curve, in simulating sports, measures the vehicle wheel of each coordinate points
Wheel disk slips a line journey along the distance on direction perpendicular to the ground as when front-wheel when the heart and design point, is existed with rigid suspension system
When not turning to the upper and lower wheel disk for jumping extreme position of wheel and during design point wheel disk along on direction perpendicular to the ground away from
Limit travel is jumped from as upper and lower wheel, each coordinate points are calculated when front-wheel journey of slipping a line jumps percentage and the conduct of limit travel with wheel
Ordinate value, using the percentage of current steering rack stroke and steering rack limit by row stroke as abscissa value, forms described
Second coupled relation curve；
In addition, in some embodiments, it is desirable to being obtained by dynamics simulation software in the special operation condition such as braking or acceleration
Under, the wheel jump of the steering front wheel and the coupled relation curve turned to；
Step S112：With reference to the first coupled relation curve and the second coupled relation curve, the automobile is obtained
The wheel of steering front wheel is jumped and turns to final coupled relation curve, wherein, each coordinate points on the final coupled relation curve
Wheel jumps the damping travel parameters that travel parameters are respective coordinates point in the first coupled relation curve and couples pass with described second
It is that the wheel of respective coordinates point in curve jumps the higher value in travel parameters.
It is following to be illustrated by combining Figure 12 to Figure 14, in order to be further understood by above-mentioned steps.
As shown in figure 12, it is one embodiment in a kind of method for making automobile steering front wheel enveloping surface of the invention provided
Suspension Roof figures schematic diagram.
In vehicle traveling process, due to the constraint of suspension, the steering front wheel of automobile can either bob, and energy
Enough rotated around stub realizes steering.Therefore, the coupling that the athletic performance of wheel is jumped and turned to for wheel.In general, automobile
In the process of moving, its wheel can't reach wheel simultaneously and jump onto the limit and steering lock.In order to describe the car of a vehicle
The extreme position that may be reached is taken turns, it is necessary to obtain the relation curve that vehicle wheel is jumped and turns to coupling（I.e. foregoing the first alleged coupling
Close relation curve）, and the bounce of wheel can be reflected with the axial stroke of damper.Certain motor turning is shown in Figure 12
The first coupled relation curve between rack stroke and damper stroke, because its shape is similar to roof shape, therefore also known as
Be roof（Roof）Figure, the first coupled relation curve is called suspension Roof and schemed by we.Wherein, axis of abscissas represents to turn to tooth
The percentage of the current stroke of bar and steering rack limit travel, reflects the steering of wheel；Axis of ordinates represents damper current line
Journey and the percentage of damper limit travel, reflect the bob of wheel.As seen from Figure 12, this automobile is in traveling
During, when steering travel reach capacity stroke 100% when, wheel jump onto journey of slipping a line not over the 80% of limit travel.
Specifically, suspension Roof figures can be obtained by the test of substantial amounts of sample car.In test, bubble is first filled out in wheel cover
Foam, the motion pole of tire is embodied on skid pad by crossing the worst operating condition of test such as hole, braking, maximum steering and climbing
Limit.The reverse motion outline for calculating tire is measured or done after the completion of experiment.On the basis of substantial amounts of test data, with reference to imitative
True analysis and the adjustment of design experiences, finally show that suspension Roof schemes.In suspension Roof figure Roof figures, each coordinate points are by two
Individual parameter composition, two parameters are respectively damper travel parameters and the first steering rack travel parameters, wherein, the first coupling pass
It is that the damper travel parameters of each coordinate points in curve are the percentage of the current stroke of damper and damper limit travel, the
One steering rack travel parameters are the percentage of the current stroke of steering rack and steering rack limit travel.
As shown in figure 13, it is a kind of vehicle in a kind of method for making automobile steering front wheel enveloping surface of the invention provided
Front vehicle wheel Roof is intended to；
By dynamics simulation software, it is considered to the geometry mechanism motion characteristic and elastic component kinetic characteristic of chassis system, adjust
The suspension Roof figures obtained in positive Figure 12 are rebuild, wheel Roof figures are obtained.
What the suspension Roof figures determined in Figure 12 reflected is the coupled relation between steering rack stroke and damper stroke,
It does not account for chassis system elastic component kinetic characteristic.In order to design more accurately front tyre envelope, in addition it is also necessary to hang herein
On the basis of frame Roof figures, by dynamics simulation software（Such as ADAMS/Car）, calculate the vehicle wheel for considering elastic component deformation
Jump-steering relation curve（That is the second coupled relation curve）, and it is defined as wheel Roof figures.The implementation process is specially：
In dynamics simulation software（Such as, ADAMS/Car）Module in, set up the vehicle front suspension system emulation mould
Type.The geometry topological structure of suspension system is contained in the simulation model, and according to real vehicle situation between the structural member of suspension
Connected using ball pivot or rubber bushing.Wherein, the stiffness characteristics of rubber bushing can pass through modification according to actual measured results
Its property file is simulated.The geometry motion characteristic of the analogue simulation suspension system carried out based on dynamics simulation software with
And elastic component kinetic characteristic, it can be closer to real vehicle motion conditions；
Motion simulation is carried out to the front suspension system of the vehicle, and the motion path of suspension is included multiple coordinate points, often
Individual coordinate points are made up of two parameters of damper stroke and rack stroke.The coordinate points in its simulating sports path need to in Figure 12
The coordinate points of suspension Roof figures are corresponded, and corresponding its steering rack stroke of two coordinate points is consistent.In simulating sports
In, wheel disk is along direction perpendicular to the ground when measuring wheel disk and the design point of each coordinate points（Z directions）On distance make
To be slipped a line journey when front-wheel.With rigid suspension system when not turning to wheel it is upper and lower jump extreme position wheel disk with design shape
Wheel disk is along direction perpendicular to the ground during state（Z directions）On distance be used as it is upper and lower wheel jump limit travel.Each coordinate points are calculated to work as
Front-wheel slip a line journey with wheel jump limit travel percentage（I.e. wheel jumps travel parameters）And as ordinate value, with steering rack stroke
With the percentage of limit travel（That is the second steering rack travel parameters）As abscissa value, emulation as shown in Figure 13 is formed
Wheel Roof schemes.
Finally, then to suspension Roof scheme and emulate wheel Roof figures to integrate, take absolute at both each coordinate points
It is worth the greater, generates final wheel Roof figures（I.e. final coupled relation curve）, it is each on the final coupled relation curve
The wheel of coordinate points jumps the damper travel parameters and described that travel parameters are the coordinate points in the first coupled relation curve
The wheel of the coordinate points of corresponding section is jumped on the higher value in travel parameters, the final coupled relation curve in two coupled relation curves
The steering rack travel parameters of each coordinate points are joined for the first steering rack stroke of the first coupled relation curve respective coordinates point
Second steering rack travel parameters of number or the second coupled relation curve respective coordinates point, it is to be understood that in respective coordinates
The first steering rack travel parameters and the second steering rack travel parameters are equal at point.
Due in the dynamics simulation conducted in dynamics simulation software, containing the flexible members such as rubber bushing
Attribute, therefore obtained final wheel Roof figures combine the Elasticity of the kinetic characteristic and elastic component of its rigid mechanism
Characteristic, makes simulating sports closer to the real conditions of automobile.
As shown in figure 14, it is that a kind of vehicle exists in a kind of method for making automobile steering front wheel enveloping surface for providing of the present invention
Steering front wheel Roof under special operation condition is intended to；
Under the special operation condition such as braking or acceleration, the space of wheel can be varied from, and Figure 14 shows automobile in system
Special Roof figures under dynamic or accelerating mode（The coupled relation curve that the wheel of steering front wheel i.e. under special operation condition is jumped and turned to）,
The special Roof figures can be drawn by with reference to simulation analysis and experience on the basis of the sample car test data under special operation condition.
It is understood that in other embodiments of the invention, final coupling can be obtained using other modes and closed
It is curve, such as by the second coupled relation curve directly as final coupled relation curve.Or directly led to by many experiments
The mode for crossing emulation is obtained, and can also be obtained by existing other modes.
To sum up, two kinds of kinematics simulation software CATIA and ADAMS softwares of R. concomitans of the present invention, in dynamic suspension system of vehicles
The performance of the flexible members such as rubber bushing is considered in the foundation and emulation of model, is considered in motion simulation experiment due to bullet
The influence of property element stress deformation and special operation condition to wheel movement.Therefore, compared with typically conventional rigid body model emulation,
The wheel movement envelope obtained in embodiments of the invention, can reflect more accurate wheel trace.In addition, utilizing
CATIA/DMU modules, the present invention implements to propose the convenient and swift accurate method for making tire motion enveloping surface, is obtained
Motion envelope face is smooth complete.
The wheel movement envelope obtained using the embodiment of the present invention carries out wheel and the gap of its Surrounding Parts is checked, its
As a result the factors, gained such as mechanism elastic deformation, the manufacture of tire and use error of the automobile under complex working condition have been considered
As a result actual conditions are more nearly, with very high reliability and security.
In addition, in embodiments of the present invention, the motion of the wheel only coordinate rail of any on wheel disk and axis
Mark is determined.Compared with prior art, the motion of wheel is no longer dependent on the motion of suspension and steering mechanism.Therefore, using the skill
Art scheme makes wheel enveloping surface, it is only necessary to which all vehicles can be just applied to by setting up a kinematics model of wheel, be not required to
Suspension geometry topological structure and hard spot information of vehicle etc. are inputted, operating efficiency is substantially increased.
It is understood that one of ordinary skill in the art will appreciate that realizing the whole in above-described embodiment method or portion
Split flow, can be by computer program to instruct the hardware of correlation to complete, described program can be stored in a computer
In read/write memory medium, the program is upon execution, it may include such as the flow of the embodiment of above-mentioned each method.Wherein, it is described
Storage medium can be magnetic disc, CD, read-only memory（Read-Only Memory, ROM）Or random access memory
（Random Access Memory, RAM）Deng.
Above disclosed is only a kind of preferred embodiment of the invention, can not limit the power of the present invention with this certainly
Sharp scope, therefore the equivalent variations made according to the claims in the present invention, still belong to the scope that the present invention is covered.
Claims (6)
1. a kind of method for making automobile steering front wheel enveloping surface, it is characterised in that comprise the following steps：
Jumped according to the wheel of the automobile steering front wheel and turn to final coupled relation curve, entered by the first kinematics simulation software
Road wheel tire enveloping surface simulation analysis, generate the movement locus file of the steering front wheel；
According to selected formulation wheel tyre model, the static models of tyre contour outline are made；Further comprise：Make the tire
The static models of tyre contour outline under general operating mode, damped condition and accelerating mode；
According to the static models of made wheel tyre profile, in the second kinematics simulation software, set up one and comprise only
The motion simulation model of the wheel contour, and fixed coordinate system is set up according to entire vehicle design requirement, its coordinate origin and seat
Parameter direction is identical with vehicle setting；
Appropriate kinematic pair and driving are created on wheel, makes the pose of wheel solid completely on wheel center point and axis
The coordinate value of fixed point determines, editor's motion rule curve, makes on the wheel tyre profile corresponding coordinate value according to before described
Geometric locus changes in the movement locus file of deflecting roller, the wheel is carried out simulating sports, its space is wrapped
Network body is scanned, and obtains the motion envelope face of the wheel；
Wherein, the static models of tyre contour outline of the making tire under general operating mode are specially：
The tire cross-section shape graph of a certain model is obtained according to ETRTO standards, the wheel tire cross-section shape is revolved around center line
Circle, obtain the static models of the tyre contour outline；
The static models of the tyre contour outline under damped condition that makes the tire are specially：
The tire cross-section shape graph of a certain model is obtained according to ETRTO standards；
Using wheel center line as axis, the tire cross-section shape is rotated to 180 ° of formation from Y-axis positive direction to Y-axis negative direction
The Part I of tire model final size；
With wheel center line along X-coordinate positive direction translate a radial-deformation formation axis P, using P as axis, by tire cross-section from
Y-axis positive direction rotates the Part II of 180 ° of formation tire model final sizes to Y-axis negative direction；
Tire cross-section is moved at P from centerline, the Part III of tire model final size is formed；
It is partially synthetic described three, obtain the static models of the tyre contour outline under the damped condition；
The static models of the tyre contour outline under accelerating mode that makes the tire are specially：
The tire cross-section shape graph of a certain model is obtained according to ETRTO standards；
Using wheel center line as axis, the tire cross-section shape is rotated to 180 ° of formation from Y-axis positive direction to Y-axis negative direction
The Part I of tire model final size；
One radial-deformation formation axis P is translated along X-axis negative direction with wheel center line, using P as axis, by tire cross-section from Y
Axle positive direction rotates the Part II of 180 ° of formation tire model final sizes to Y-axis negative direction；
Tire cross-section is moved at P from centerline, the Part III of tire model final size is formed；
It is partially synthetic described three, obtain the static models of the tyre contour outline under the damped condition.
2. the method for automobile steering front wheel enveloping surface is made as claimed in claim 1, it is characterised in that the final coupling is closed
It is that curve includes multiple coordinate points, each coordinate points include wheel and jump travel parameters and steering rack row in the multiple coordinate points
Journey parameter.
3. the method for automobile steering front wheel enveloping surface is made as claimed in claim 2, it is characterised in that the steering front wheel
Movement locus file at least includes：Each moment during emulation experiment, the x of the wheel center point of the steering front wheel,
With x, y, the fortune of z coordinate of the core wheel distance for the certain point of a fixed value on y, the movement locus of z coordinate, and wheel axis
Dynamic rail mark.
4. the method for automobile steering front wheel enveloping surface is made as claimed in claim 3, it is characterised in that described to make the wheel
The step of corresponding coordinate value changes according to geometric locus in the movement locus file of the steering front wheel on tyre contour outline is specific
For：
At least make on the x of the static models central point of the wheel contour, y, z coordinate value and axis be with central point distance
The x of any of one fixed value, z coordinate value is moved according to the corresponding track in the movement locus file of the steering front wheel respectively.
5. the method for automobile steering front wheel enveloping surface is made as claimed in claim 4, it is characterised in that further comprised：
According to the tire enveloping surface of made automobile steering front wheel, its interference relation with the tire periphery part is simulated.
6. the method for automobile steering front wheel enveloping surface is made as claimed in claim 4, it is characterised in that first kinematics
Simulation software is ADAMS/Car softwares；Second kinematics simulation software is CATIA/DMU softwares.
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| CN105868517B (en) * | 2016-06-23 | 2018-10-26 | 奇瑞汽车股份有限公司 | Automobile exhaust pipeline vibrates enveloping solid production method |
| CN106777705A (en) * | 2016-12-21 | 2017-05-31 | 奇瑞汽车股份有限公司 | The method for designing on parts 3D profiles border at automotive suspension |
| CN106980714B (en) * | 2017-03-08 | 2020-10-30 | 吉利汽车研究院（宁波）有限公司 | Checking method for operation space of automobile one-key starting switch |
| CN109598005A (en) * | 2017-09-30 | 2019-04-09 | 长城汽车股份有限公司 | The construction method of tire positional parameter acquisition methods and automobile tire motion envelope |
| CN109270895A (en) * | 2018-07-20 | 2019-01-25 | 青岛理工大学 | The method for realizing complex tire design based on CATIA platform |
| CN109815567B (en) * | 2019-01-09 | 2023-04-18 | 吉利汽车研究院（宁波）有限公司 | Suspension tire envelope generation method |
| CN112287505A (en) * | 2019-07-09 | 2021-01-29 | 广州汽车集团股份有限公司 | Method and device for generating front wheel envelope, and computer storage medium and equipment |
| CN112257267B (en) * | 2020-10-23 | 2023-12-01 | 华人运通(江苏)技术有限公司 | Manufacturing method and system for vehicle tire envelope |
| CN113686598B (en) * | 2021-06-30 | 2023-09-01 | 中汽研汽车检验中心（天津）有限公司 | K & C test bench-based tire wheel cover interference inspection method |
| CN113886945A (en) * | 2021-09-09 | 2022-01-04 | 东风汽车集团股份有限公司 | Wheel and wheel cover prediction method and device |
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