CN115626234A - Method and system for generating driving shaft envelope - Google Patents
Method and system for generating driving shaft envelope Download PDFInfo
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- CN115626234A CN115626234A CN202211333492.7A CN202211333492A CN115626234A CN 115626234 A CN115626234 A CN 115626234A CN 202211333492 A CN202211333492 A CN 202211333492A CN 115626234 A CN115626234 A CN 115626234A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D65/00—Designing, manufacturing, e.g. assembling, facilitating disassembly, or structurally modifying motor vehicles or trailers, not otherwise provided for
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Abstract
The invention discloses a method and a system for generating a drive shaft envelope, which comprises the following steps: acquiring parameters corresponding to the automobile to be verified under various typical working conditions; acquiring relative position information between a driving shaft of an automobile to be verified and related parts under the action of corresponding parameters under various typical working conditions; acquiring actual motion tracks of the following time of the inner spherical hinge and the outer spherical hinge of the driving shaft under various typical working conditions according to the relative position information between the driving shaft of the automobile to be verified and related parts; based on the actual motion trail, obtaining the central coordinates of the inner spherical hinge and the outer spherical hinge of the driving shaft under various typical working conditions along with the change of time, and drawing the motion envelopes of the inner spherical hinge and the outer spherical hinge of the driving shaft model under various typical working conditions by combining the driving shaft model; under various typical working conditions, the motion envelopes of the driving shaft model are obtained by overlapping the motion envelopes of the inner spherical hinge and the outer spherical hinge of the driving shaft model.
Description
Technical Field
The present application relates to the field of vehicle design and development, and in particular, to a method and a system for generating a driving shaft envelope.
Background
The driving shaft envelope refers to a space motion track swept by the driving shaft moving along with wheels and a power assembly in various driving conditions, and the reasonability judgment is carried out on the space arrangement through the interference condition of the driving shaft and peripheral parts. If the arrangement is not reasonable, for example, there is interference risk such as friction and collision, the driving safety of the whole vehicle can be involved.
For a driving shaft, the actual motion characteristic of the driving shaft is that the inner ball joint end vibrates along with a power assembly, the outer ball joint end moves along with a wheel, and the motion of the driving shaft is the coupling of the two motions.
Disclosure of Invention
The invention provides a method and a system for generating an envelope of a driving shaft, wherein the motion of an inner spherical hinge and an outer spherical hinge of the driving shaft are respectively and directly associated with typical working conditions, the motion characteristics of the inner spherical hinge and the outer spherical hinge under each typical working condition are obtained by referring to the actual motion trail of the inner spherical hinge and the outer spherical hinge of the driving shaft along with the time under the typical working conditions, the motion characteristics of the inner spherical hinge and the outer spherical hinge under each typical working condition are combined, and the accurate motion envelope of the driving shaft is obtained by decoupling and recoupling, so that the technical problem that the real condition of the motion of the driving shaft cannot be covered by the drawing of the envelope of the driving shaft in the prior art is solved or partially solved.
In order to solve the above technical problem, in a first aspect of the present invention, a method for generating a driving axis envelope is disclosed, the method comprising:
acquiring parameters corresponding to the automobile to be verified under various typical working conditions;
acquiring relative position information between a driving shaft of the automobile to be verified and related parts under the action of corresponding parameters under various typical working conditions; the related parts are as follows: the power assembly is connected with an inner spherical hinge of a driving shaft of the automobile to be verified, and the tire is connected with an outer spherical hinge of the driving shaft of the automobile to be verified;
acquiring actual motion tracks of the inner and outer spherical hinges of the driving shaft along with time under various typical working conditions according to relative position information between the driving shaft of the automobile to be verified and related parts;
acquiring the central coordinates of the inner spherical hinge and the outer spherical hinge of the driving shaft along with time change under various typical working conditions based on the actual motion trail, and drawing the motion envelopes of the inner spherical hinge and the outer spherical hinge of the driving shaft model under various typical working conditions by combining with the driving shaft model;
under various typical working conditions, the motion envelopes of the driving shaft model are obtained by overlapping the motion envelopes of the inner spherical hinge and the outer spherical hinge of the driving shaft model; the motion envelope of the driving shaft model is used for representing the driving shaft motion envelope under the coupling working condition formed by the motion of the follow-up power assembly and the wheel.
Preferably, the various typical working conditions are obtained by combining the wheel motion law and the power assembly vibration law;
the motion rule of the wheels comprises vertical jumping along with a suspension system, rotation along with a steering system and superimposed motion of the two motions;
the powertrain vibration law includes: the power assembly rotates around the center of mass of the power assembly, and the rotation is decomposed into rotation around an X axis, a Y axis and a Z axis and movement of the center of mass of the power assembly in the directions of the X axis, the Y axis and the Z axis.
Preferably, the various typical operating conditions represent the operating conditions of the real movement of the driving shaft, and include: the control method comprises the following steps of a full-throttle 0-100 acceleration working condition, a maximum braking force 100-0 braking working condition, a full-throttle reverse gear working condition, a turning working condition, a pit bumping working condition, a packet bumping working condition and a superposition working condition of the working conditions, wherein the superposition working conditions comprise a full-throttle left-turn working condition, a full-throttle right-turn working condition, a full-throttle pit bumping working condition and a full-throttle packet bumping working condition.
Preferably, the parameters corresponding to the automobile to be verified under various typical working conditions comprise driving parameters and road parameters under various typical working conditions; wherein, the driving parameters and the road parameters under different working conditions are different.
Preferably, the acquiring of the relative position information between the driving shaft of the automobile to be verified and the relevant parts under the action of the parameters corresponding to the various typical working conditions specifically includes:
selecting rigid positioning points on a white automobile body, the wheels and the power assembly of the automobile;
measuring the motion parameters of the wheels and the powertrain relative to the body-in-white of the automobile during the running of the automobile based on the rigid positioning points, wherein the motion parameters are coordinate information which changes along with time;
and acquiring the relative position information of the inner spherical hinge and the outer spherical hinge of the driving shaft relative to the white automobile body of the automobile along with the change of time based on the space position relations between the power assembly and the inner spherical hinge and between the wheels and the outer spherical hinge.
Preferably, the measuring, based on the rigid positioning point, a motion parameter of the wheel and the powertrain relative to the body-in-white of the automobile during running of the automobile, where the motion parameter is coordinate information that changes with time, specifically includes:
acquiring absolute coordinate information of rigid positioning points on the body-in-white, the wheels and the power assembly of the automobile;
and under the state that the body-in-white of the automobile is absolutely static, the relative coordinate information of the rigid positioning points on the wheels and the power assembly relative to the rigid positioning points on the body-in-white of the automobile is calculated by combining the absolute coordinate information of the rigid positioning points on the body-in-white of the automobile, the wheels and the power assembly relative to the movement of the wheels and the power assembly relative to the body-in-white of the automobile.
Preferably, the spatial position relationship between the power assembly and the inner spherical hinge is an inner spherical hinge central coordinate calculated by the relative coordinate information coordinate of a rigid positioning point on the power assembly based on the relative stationary motion relationship between the power assembly and the inner spherical hinge;
preferably, the spatial position relationship between the wheel and the outer spherical hinge is the center coordinate of the outer spherical hinge calculated by the relative coordinate information of the rigid positioning point on the wheel based on the relative stationary motion relationship between the wheel and the outer spherical hinge.
Preferably, the drive shaft model has different motion envelopes under different typical working conditions.
In a second aspect of the present invention, a system for generating a driving-axis envelope is disclosed, comprising:
the first acquisition unit is used for acquiring parameters corresponding to the automobile to be verified under various typical working conditions;
the second acquisition unit is used for acquiring the relative position information between the driving shaft of the automobile to be verified and relevant parts under the action of the corresponding parameters under various typical working conditions; the related parts are as follows: the power assembly is connected with an inner spherical hinge of a driving shaft of the automobile to be verified, and the tire is connected with an outer spherical hinge of the driving shaft of the automobile to be verified;
the third acquisition unit is used for acquiring the actual motion trail of the inner and outer spherical hinges following time of the driving shaft under various typical working conditions according to the relative position information between the driving shaft of the automobile to be verified and related parts;
the drawing unit is used for acquiring the central coordinates of the inner spherical hinge and the outer spherical hinge of the driving shaft under various typical working conditions along with the change of time based on the actual motion track, and drawing the motion envelopes of the inner spherical hinge and the outer spherical hinge of the driving shaft model under various typical working conditions by combining with the driving shaft model;
the envelope generating unit is used for obtaining the motion envelope of the driving shaft model by overlapping the motion envelopes of the inner spherical hinge and the outer spherical hinge of the driving shaft model under various typical working conditions; the motion envelope of the driving shaft model is used for representing the driving shaft motion envelope under the coupling working condition formed by the motion of the follow-up power assembly and the wheel.
Through one or more technical schemes of the invention, the invention has the following beneficial effects or advantages:
the invention discloses a method and a system for generating an envelope of a driving shaft, wherein the motion of an inner spherical hinge and an outer spherical hinge of the driving shaft are respectively and directly associated with typical working conditions, the motion characteristics of the inner spherical hinge and the outer spherical hinge under each typical working condition are obtained through the obtained actual motion trail of the inner spherical hinge and the outer spherical hinge of the driving shaft along with time under each typical working condition, the motion characteristics of the inner spherical hinge and the outer spherical hinge are combined under each typical working condition, and the accurate motion envelope of the driving shaft is obtained through the mode of decoupling and recoupling.
The above description is only an overview of the technical solutions of the present invention, and the present invention can be implemented in accordance with the content of the description so as to make the technical means of the present invention more clearly understood, and the above and other objects, features, and advantages of the present invention will be more clearly understood.
Drawings
Various additional advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings.
In the drawings:
FIG. 1 illustrates a flow diagram of a method for generating a driveshaft envelope in accordance with one embodiment of the invention;
FIG. 2 illustrates a schematic diagram of a system for generating a driveshaft envelope in accordance with one embodiment of the invention.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Referring to fig. 1, an embodiment of the present invention discloses a method for generating a driving axis envelope, including the following steps:
step 101, obtaining parameters corresponding to the automobile to be verified under various typical working conditions.
In this embodiment, a welded vehicle body (which does not include moving parts such as four doors and two covers) which is not coated, that is, a vehicle body in white, is taken as a vehicle to be verified, which has the advantages of simple structure, and capability of avoiding interference caused by redundant vehicle body parts such as four doors and two covers, interior and exterior decorations, electronic and electrical systems and the like, so that the drawn driving shaft envelope is more accurate.
In the embodiment, various typical working conditions are obtained by combining the wheel motion law and the powertrain vibration law. The motion law of the wheels comprises up-and-down jumping along with a suspension system, rotation along with a steering system and superimposed motion of the two motions. The powertrain vibration law includes: the rotation of the power assembly around the center of mass of the power assembly and the movement of the center of mass of the power assembly. When the automobile is in a static state on a horizontal road surface, the X axis is parallel to the ground and points to the front of the automobile, the Z axis points to the upper part through the mass center of the automobile, and the Y axis points to the left side of a driver; on the basis, the movement of the center of mass of the power assembly can be decomposed into the movement of the center of mass of the power assembly in the directions of the X axis, the Y axis and the Z axis of the automobile coordinate system. In the embodiment, typical working conditions which can represent the real movement of the driving shaft are found by combining the wheel movement law and the powertrain vibration law. Each typical working condition can be divided according to an acceleration working condition, a deceleration working condition, a turning working condition and a bumping working condition, and specifically comprises the following steps: the system comprises a full-throttle acceleration working condition of 0-100, a maximum braking force working condition of 100-0, a full-throttle reverse gear working condition, a turning working condition, a pit bumping working condition, a packet bumping working condition and a superposition working condition of the working conditions, wherein the superposition working conditions comprise a full-throttle left-turn working condition, a full-throttle right-turn working condition, a full-throttle pit bumping working condition and a full-throttle packet bumping working condition.
In this embodiment, the parameters of the vehicle to be verified are different under various typical operating conditions. Specifically, the parameters of the vehicle to be verified in this embodiment include driving parameters and road parameters, such as accelerator opening, braking force, steering angle, road pit size (length, width, height), and road bag size (length, width, height). Different typical working conditions correspond to respective driving parameters and road parameters, for example, the parameters corresponding to the automobile to be verified are different under the full-throttle 0-100 acceleration working condition and the maximum braking force 100-0 braking working condition.
In the embodiment, various typical working conditions can be obtained by combining the wheel motion law and the power assembly vibration law; and designing driving parameters and road parameters of the automobile to be verified according to various typical working conditions, and preparing for subsequent motion envelopes.
And 102, acquiring relative position information between the driving shaft of the automobile to be verified and relevant parts under the action of the corresponding parameters under various typical working conditions.
Wherein, the relevant parts are as follows: the power assembly is connected with the inner spherical hinge of the driving shaft of the automobile to be verified, and the tire is connected with the outer spherical hinge of the driving shaft of the automobile to be verified.
In order to obtain the relative position information of the inner spherical hinge of the drive shaft and the power assembly and the relative position information of the outer spherical hinge and the tire, the embodiment of the invention is implemented as follows.
Step 1, selecting rigid positioning points on a body-in-white, the wheels and the power assembly of the automobile.
And 2, measuring the motion parameters of the wheels and the power assembly relative to the body-in-white of the automobile during the running of the automobile based on the rigid positioning points. The rigid positioning point can be represented by coordinates, and the motion parameter is coordinate information changing along with time.
In the step 2, absolute coordinate information of the body in white, the wheels and the rigid positioning points on the power assembly of the automobile is obtained, wherein the absolute coordinate information refers to coordinate information of the body in white, the wheels and the power assembly of the automobile in a static state. And under the state that the body-in-white of the automobile is absolutely static, the motion parameters relative to the body-in-white of the automobile can be obtained through the motion of the wheels and the powertrain relative to the body-in-white of the automobile. Specifically, the relative coordinate information of the rigid positioning point on the wheel and the powertrain relative to the rigid positioning point on the body-in-white of the automobile can be calculated by combining the absolute coordinate information during movement. The relative coordinate information can be used for representing the motion parameters of the wheels and the powertrain relative to the body-in-white of the automobile.
And 3, acquiring relative position information of the inner and outer spherical hinges of the driving shaft relative to the white automobile body of the automobile along with time based on the space position relations among the power assembly, the inner spherical hinge, the wheels and the outer spherical hinge.
In the step 3, the spatial position relationship between the power assembly and the inner spherical hinge is based on the relative static motion relationship between the power assembly and the inner spherical hinge, the central coordinate of the inner spherical hinge is calculated by the relative coordinate information coordinate of the rigid positioning point on the power assembly, the calculation mode is three-dimensional space coordinate solving, and the relative position information of the inner spherical hinge relative to the white automobile body of the automobile along with the time change can be converted by the central coordinate of the inner spherical hinge and the motion parameters of the power assembly relative to the white automobile body of the automobile. Similarly, the spatial position relationship between the wheel and the outer spherical hinge is based on the relative static motion relationship between the wheel and the outer spherical hinge, the central coordinate of the outer spherical hinge calculated by the relative coordinate information of the rigid positioning point on the wheel is calculated in a three-dimensional space coordinate solving mode, and the relative position information of the outer spherical hinge relative to the automobile body-in-white along with the time change can be converted by the central coordinate of the outer spherical hinge and the motion parameters of the wheel relative to the automobile body-in-white.
In the embodiment, the driving shaft is decoupled into the inner spherical hinge and the outer spherical hinge, so that the motion relation between the driving shaft and the automobile body-in-white is disassembled into the relative position information of the inner spherical hinge and the outer spherical hinge relative to the automobile body-in-white, which changes along with time, and the real situation of the motion of the transmission shaft can be covered.
And 103, acquiring actual motion tracks of the inner and outer spherical hinges of the driving shaft along with time under various typical working conditions according to the relative position information between the driving shaft of the automobile to be verified and related parts.
In this embodiment, the relative position information between the driving shaft and the relevant parts can be decoupled into the time-varying relative position information of the inner and outer spherical hinges (i.e., the inner spherical hinge and the outer spherical hinge) relative to the body-in-white of the automobile, so as to draw the actual motion trajectories of the inner and outer spherical hinges respectively following the time.
And 104, acquiring the central coordinates of the inner spherical hinge and the outer spherical hinge of the driving shaft along with time change under various typical working conditions based on the actual motion trail, and drawing the motion envelopes of the inner spherical hinge and the outer spherical hinge of the driving shaft model under various typical working conditions by combining with the driving shaft model.
In this embodiment, the actual motion trajectory refers to an actual motion trajectory in which the center coordinates of the inner and outer spherical hinges change with time. It is worth noting that the inner and outer spherical hinges have different actual motion tracks under different typical working conditions, so that the motion envelopes are distinguished according to the typical working conditions. Under each typical working condition, the central coordinates of the inner spherical hinge and the outer spherical hinge of the driving shaft along with the change of time are obtained based on the corresponding actual motion track, and the motion envelopes of the inner spherical hinge and the outer spherical hinge of the driving shaft model under the typical working condition can be drawn by combining the driving shaft model. It is noted that the drive shaft model has different motion envelopes under different typical conditions.
In the embodiment, the driving shaft is decoupled into the inner spherical hinge and the outer spherical hinge, the motion relationship between the inner spherical hinge and the power assembly along with relative rest, the motion relationship between the outer spherical hinge and the tire along with relative rest, and the motion parameters of the wheel and the power assembly relative to the automobile body-in-white during the running of the automobile are integrated, and the relative position information of the inner spherical hinge and the outer spherical hinge relative to the automobile body-in-white along with time is obtained, so that the actual motion tracks (namely, the motion characteristics) of the inner spherical hinge and the outer spherical hinge under each typical working condition are obtained, and the motion envelopes of the inner spherical hinge and the outer spherical hinge are drawn according to the actual motion tracks. Therefore, the motion envelopes of the inner spherical hinge and the outer spherical hinge respectively drawn by the embodiment can cover the real situation of the motion of the driving shaft.
And 105, under various typical working conditions, obtaining the motion envelope of the driving shaft model by overlapping the motion envelopes of the inner spherical hinge and the outer spherical hinge of the driving shaft model.
The motion envelope of the driving shaft model is used for representing the driving shaft motion envelope under the coupling working condition formed by the motion of the follow-up power assembly and the wheel.
In this embodiment, under the various typical conditions, the motion envelopes of the inner and outer spherical hinges are coupled, so that the motion envelope of the driving shaft, which can cover the real situation of the motion of the driving shaft under the coupling condition formed by the motion of the power assembly and the wheels, can be obtained.
Based on the same inventive concept, the embodiment of the present invention further discloses a system for generating a driving axis envelope, referring to fig. 2, including:
the first obtaining unit 201 is configured to obtain parameters corresponding to the vehicle to be verified under various typical working conditions;
the second obtaining unit 202 is configured to obtain relative position information between the driving shaft of the automobile to be verified and a relevant part under the action of the corresponding parameters under the various typical working conditions; the related parts are as follows: the power assembly is connected with the inner spherical hinge of the driving shaft of the automobile to be verified, and the tire is connected with the outer spherical hinge of the driving shaft of the automobile to be verified;
a third obtaining unit 203, configured to obtain, according to the relative position information between the driving shaft of the automobile to be verified and a relevant component, actual motion trajectories of inner and outer spherical hinge following times of the driving shaft under various typical working conditions;
a drawing unit 204, configured to obtain, based on the actual motion trajectory, center coordinates of the inner and outer spherical hinges of the drive shaft changing with time under various typical working conditions, and draw, in combination with a drive shaft model, motion envelopes of the inner and outer spherical hinges of the drive shaft model under various typical working conditions;
the envelope generation unit 205 is configured to obtain a motion envelope of the driving shaft model by superimposing motion envelopes of the inner and outer spherical hinges of the driving shaft model under the various typical working conditions; the motion envelope of the driving shaft model is used for representing the driving shaft motion envelope under the coupling working condition formed by the motion of the follow-up power assembly and the wheel.
Through one or more embodiments of the present invention, the present invention has the following advantageous effects or advantages:
the invention discloses a method and a system for generating an envelope of a driving shaft, wherein the motion of an inner spherical hinge and the motion of an outer spherical hinge of the driving shaft are respectively directly associated with typical working conditions, the motion characteristics of the inner spherical hinge and the outer spherical hinge under each typical working condition are obtained through the obtained actual motion trail of the inner spherical hinge and the outer spherical hinge of the driving shaft along with time under each typical working condition, the motion characteristics of the inner spherical hinge and the outer spherical hinge are combined under each typical working condition, and the accurate motion envelope of the driving shaft is obtained through the mode of decoupling and recoupling.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. A method of generating a driveshaft envelope, the method comprising:
acquiring parameters corresponding to the automobile to be verified under various typical working conditions;
acquiring relative position information between a driving shaft of the automobile to be verified and related parts under the action of corresponding parameters under various typical working conditions; the related parts are as follows: the power assembly is connected with the inner spherical hinge of the driving shaft of the automobile to be verified, and the tire is connected with the outer spherical hinge of the driving shaft of the automobile to be verified;
acquiring actual motion tracks of the inner and outer spherical hinges of the driving shaft along with time under various typical working conditions according to relative position information between the driving shaft of the automobile to be verified and related parts;
acquiring the central coordinates of the inner and outer spherical hinges of the driving shaft under various typical working conditions along with the change of time based on the actual motion trail, and drawing the motion envelopes of the inner and outer spherical hinges of the driving shaft model under various typical working conditions by combining with the driving shaft model;
under various typical working conditions, the motion envelopes of the driving shaft model are obtained by overlapping the motion envelopes of the inner spherical hinge and the outer spherical hinge of the driving shaft model; the motion envelope of the driving shaft model is used for representing the driving shaft motion envelope under the coupling working condition formed by the motion of the follow-up power assembly and the wheel.
2. The method of claim 1, wherein the typical operating conditions are obtained by combining a wheel motion law and a powertrain vibration law;
the motion law of the wheels comprises vertical jumping along with a suspension system, rotation along with a steering system and superimposed motion of the two motions;
the powertrain vibration law includes: the power assembly rotates around the center of mass of the power assembly, and the rotation is decomposed into rotation around an X axis, a Y axis and a Z axis and movement of the center of mass of the power assembly in the directions of the X axis, the Y axis and the Z axis.
3. The method according to claim 1 or 2, wherein the various types of typical conditions represent conditions of true motion of the drive shaft, and comprise: the system comprises a full-throttle acceleration working condition of 0-100, a maximum braking force working condition of 100-0, a full-throttle reverse gear working condition, a turning working condition, a pit bumping working condition, a packet bumping working condition and a superposition working condition of the working conditions, wherein the superposition working conditions comprise a full-throttle left-turn working condition, a full-throttle right-turn working condition, a full-throttle pit bumping working condition and a full-throttle packet bumping working condition.
4. The method of claim 1, wherein the parameters corresponding to the vehicle to be verified under various typical working conditions comprise driving parameters and road parameters under various typical working conditions; wherein, the driving parameters and the road parameters under different working conditions are different.
5. The method according to claim 1, wherein the acquiring of the relative position information between the driving shaft of the vehicle to be verified and the relevant parts under the action of the parameters corresponding to the various typical operating conditions specifically comprises:
selecting rigid positioning points on a white automobile body, the wheels and the power assembly of the automobile;
measuring the motion parameters of the wheels and the powertrain relative to the body-in-white of the automobile during the running of the automobile based on the rigid positioning points, wherein the motion parameters are coordinate information which changes along with time;
and acquiring relative position information of the inner spherical hinge and the outer spherical hinge of the driving shaft relative to the white automobile body of the automobile along with the change of time based on the space position relations among the power assembly, the inner spherical hinge, the wheels and the outer spherical hinge.
6. The method according to claim 5, wherein the measuring of the motion parameters of the wheel and the powertrain relative to the body-in-white of the vehicle while the vehicle is in motion based on the rigid anchor points comprises:
acquiring absolute coordinate information of rigid positioning points on the automobile body-in-white, the wheels and the power assembly;
and under the state that the body-in-white of the automobile is absolutely static, the relative coordinate information of the rigid positioning points on the wheels and the power assembly relative to the rigid positioning points on the body-in-white of the automobile is calculated by combining the absolute coordinate information of the rigid positioning points on the body-in-white of the automobile, the wheels and the power assembly relative to the movement of the wheels and the power assembly relative to the body-in-white of the automobile.
7. The method of claim 5, wherein the spatial relationship between the powertrain and the inner ball joint is the center coordinates of the inner ball joint calculated from the coordinates of the relative coordinate information of the rigid positioning points on the powertrain based on the relative stationary motion relationship between the powertrain and the inner ball joint.
8. The method of claim 5, wherein the spatial relationship between the wheel and the outer ball joint is the center coordinates of the outer ball joint calculated from the relative coordinate information of the rigid positioning points on the wheel based on the relative stationary motion relationship between the wheel and the outer ball joint.
9. The method of claim 1, wherein the drive shaft model has different motion envelopes under different typical operating conditions.
10. A system for generating a drive shaft envelope, comprising:
the first acquisition unit is used for acquiring parameters corresponding to the automobile to be verified under various typical working conditions;
the second acquisition unit is used for acquiring the relative position information between the driving shaft of the automobile to be verified and relevant parts under the action of the corresponding parameters under various typical working conditions; the related parts are as follows: the power assembly is connected with the inner spherical hinge of the driving shaft of the automobile to be verified, and the tire is connected with the outer spherical hinge of the driving shaft of the automobile to be verified;
the third acquisition unit is used for acquiring the actual motion trail of the inner and outer spherical hinges following time of the driving shaft under various typical working conditions according to the relative position information between the driving shaft of the automobile to be verified and related parts;
the drawing unit is used for acquiring the central coordinates of the inner spherical hinge and the outer spherical hinge of the driving shaft under various typical working conditions along with the change of time based on the actual motion track, and drawing the motion envelopes of the inner spherical hinge and the outer spherical hinge of the driving shaft model under various typical working conditions by combining with the driving shaft model;
the envelope generating unit is used for obtaining the motion envelope of the driving shaft model by overlapping the motion envelopes of the inner spherical hinge and the outer spherical hinge of the driving shaft model under various typical working conditions; the motion envelope of the driving shaft model is used for representing the driving shaft motion envelope under the coupling working condition formed by the motion of the follow-up power assembly and the wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211333492.7A CN115626234A (en) | 2022-10-28 | 2022-10-28 | Method and system for generating driving shaft envelope |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211333492.7A CN115626234A (en) | 2022-10-28 | 2022-10-28 | Method and system for generating driving shaft envelope |
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| CN115626234A true CN115626234A (en) | 2023-01-20 |
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| CN202211333492.7A Pending CN115626234A (en) | 2022-10-28 | 2022-10-28 | Method and system for generating driving shaft envelope |
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| CN (1) | CN115626234A (en) |
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- 2022-10-28 CN CN202211333492.7A patent/CN115626234A/en active Pending
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