CN104691269B - Method and system for designing stabilizer bar of automotive suspension - Google Patents
Method and system for designing stabilizer bar of automotive suspension Download PDFInfo
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- CN104691269B CN104691269B CN201310649152.XA CN201310649152A CN104691269B CN 104691269 B CN104691269 B CN 104691269B CN 201310649152 A CN201310649152 A CN 201310649152A CN 104691269 B CN104691269 B CN 104691269B
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- 239000000725 suspension Substances 0.000 title claims abstract description 267
- 239000003381 stabilizer Substances 0.000 title claims abstract description 195
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000009434 installation Methods 0.000 claims description 19
- 239000006096 absorbing agent Substances 0.000 claims description 3
- 230000035939 shock Effects 0.000 claims description 3
- 238000010030 laminating Methods 0.000 abstract 1
- 230000008569 process Effects 0.000 description 2
- 238000012938 design process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
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- 230000003287 optical effect Effects 0.000 description 1
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Abstract
The invention discloses a method for designing a stabilizer bar of an automotive suspension. The method comprises the steps of: (a) setting the installing position of the suspension stabilizer bar and the length and position data of a connecting rod according to predefined shapes and installing positions of all parts of the automotive suspension; (b) building a DMU model according to the set data to generate motion envelopes; (c) laminating the motion envelopes to obtain a maximum value, setting the shape of the suspension stabilizer bar, and obtaining a gap between the suspension stabilizer bar and the maximal motion envelope; (d) judging if any value of the obtained gap is greater than a predefined safety gap, if so, operating the step (e), if not, returning to the step (b) after resetting the installing position of the suspension stabilizer bar and the length and position data of the connecting rod; and (e) finishing the design. The invention further discloses a system for designing the stabilizer bar of the automotive suspension. The method and the system simplify the design steps of the suspension stabilizer bar, shorten the design period, and improve the shape design level of the suspension stabilizer bar.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a method and a system for designing a stabilizer bar of an automobile suspension.
Background
In general, in order to reduce the offset frequency of an automobile suspension to improve the running smoothness of an automobile, the vertical rigidity of the automobile suspension is designed to be relatively low, so that the roll angle rigidity of the automobile is also designed to be relatively low, and a larger vehicle body roll angle is generated when the automobile runs in a turn, so that the running stability of the automobile is influenced. In order to solve the above problems, a suspension stabilizer bar design is adopted in the front and rear suspensions of the automobile at present, and the ratio of the roll angle rigidity of the front and rear suspensions of the automobile is adjusted through the suspension stabilizer bar, so as to obtain the required steering characteristics.
In the suspension design process, parts such as a control arm, a shock absorber and the like are generally designed, and then the suspension stabilizer bar is arranged according to the space left by the parts, so that the suspension stabilizer bar can be made into a relatively complex shape, in the suspension design state, the motion of the stabilizer bar needs to be checked when the suspension stabilizer bar is arranged, if the motion of any part of the automobile suspension and the suspension stabilizer bar is interfered, the shape of the suspension stabilizer bar needs to be redesigned, and the motion check is carried out again until the motion between each part of the automobile suspension and the suspension stabilizer bar is normal. The disadvantages of this design approach are: the shape and position of the suspension stabilizer bar are difficult to determine, and the design effort is large and the cycle is long.
Disclosure of Invention
The embodiment of the invention aims to provide a method and a system for designing a stabilizer bar of an automobile suspension, which can solve the problems that the shape and the position of the stabilizer bar of the suspension are difficult to determine, the design workload is large and the period is long in the prior art.
In order to solve the technical problem, an embodiment of the present invention provides a method for designing a stabilizer bar of an automotive suspension, including the steps of:
a. setting the mounting position of a suspension stabilizer bar and the length and position data of a suspension stabilizer bar connecting rod according to the shape and the mounting position of each related part of a predefined automobile suspension;
b. establishing a DMU model according to the mounting position data of the suspension stabilizer bar and the length and position data of the connecting rod, and acquiring the motion envelope of each relevant part of the automobile suspension relative to the suspension stabilizer bar according to the DMU model;
c. superposing the generated motion envelopes to obtain a maximum motion envelope, setting the shape of the suspension stabilizer bar according to the maximum motion envelope, and obtaining a gap between the suspension stabilizer bar and the maximum motion envelope according to the shape of the suspension stabilizer bar;
d. judging whether any gap between the suspension stabilizer bar and the maximum motion envelope is larger than a predefined safety gap, and if so, operating the next step e; if not, resetting the mounting position of the suspension stabilizer bar and the length and position data of the suspension stabilizer bar connecting rod, and returning to the step b;
e. obtaining the shape and the installation position of the suspension stabilizer bar and the length and the position of the suspension stabilizer bar;
wherein the step c of superimposing the generated motion envelopes to obtain a maximum motion envelope according to which the suspension stabilizer bar is shaped includes:
and superposing the generated motion envelopes to obtain a maximum motion envelope, obtaining a space where the suspension stabilizer bar can be arranged according to the maximum motion envelope, and arranging the shape of the suspension stabilizer bar in the space.
Wherein, before step a, the method further comprises the steps of: the shapes and the installation positions of all relevant parts of the automobile suspension and the safety clearance between the relevant parts of the automobile suspension and the suspension stabilizer bar are predefined.
Wherein said step d of determining whether any gap between said suspension stabilizer bar and said maximum motion envelope is greater than a predefined safety gap comprises:
and judging whether any gap between the suspension stabilizer bar and the maximum motion envelope is correspondingly larger than a predefined safety gap between each relevant part of the automobile suspension and the suspension stabilizer bar.
Wherein, the related parts of the automobile suspension comprise an auxiliary frame, a control arm and a shock absorber.
The embodiment of the invention also provides a system for designing the stabilizer bar of the automobile suspension, which comprises the following components: the device comprises a setting unit, a first acquiring unit, a second acquiring unit, a judging unit and a third acquiring unit; wherein,
the setting unit is used for setting the mounting position of the suspension stabilizer bar and the length and position data of the suspension stabilizer bar connecting rod according to the shape and the mounting position of each related part of the automobile suspension defined in advance;
the first acquisition unit is used for establishing a DMU model according to the mounting position data of the stabilizer bar and the length and position data of the connecting rod, and acquiring the motion envelope of each relevant part of the automobile suspension relative to the stabilizer bar of the suspension according to the DMU model;
the second acquisition unit is used for superposing the generated motion envelopes to obtain a maximum motion envelope, setting the shape of the suspension stabilizer bar according to the maximum motion envelope, and obtaining a gap between the suspension stabilizer bar and the maximum motion envelope according to the shape of the suspension stabilizer bar;
the judging unit is used for judging whether any gap between the suspension stabilizer bar and the maximum motion envelope is larger than a predefined safety gap;
the third acquisition unit is configured to acquire the shape and the mounting position of the suspension stabilizer bar and the length and the position of the suspension stabilizer bar link.
Wherein, the system also comprises a preset unit;
the preset unit is used for predefining the shape and the installation position of each relevant part of the automobile suspension and the safety clearance between each relevant part of the automobile suspension and the suspension stabilizer bar.
In the embodiment of the present invention, the shape and the mounting position of each relevant part of the automobile suspension and the safety clearance between each relevant part of the automobile suspension and the suspension stabilizer bar are defined in advance, and the mounting position of the suspension stabilizer bar and the length and the position of the suspension stabilizer bar link are arranged according to the above-mentioned predefined conditions. After arrangement is completed, a DMU (Digital Mock-Up) model is established, the DMU model is driven, the motion envelopes of all relevant parts of the automobile suspension relative to the suspension stabilizer bar are obtained, the obtained motion envelopes are superposed together to obtain a maximum motion envelope, the arrangement space of the suspension stabilizer bar is obtained according to the maximum motion envelope, the shape of the suspension stabilizer bar is designed in the space, whether any gap between the suspension stabilizer bar and the maximum motion envelope (namely the gap between the suspension stabilizer bar and the motion envelopes of all relevant parts of the automobile suspension) meets the safety gap between all relevant parts of the automobile suspension and the suspension stabilizer bar is judged, if not, the shape of the suspension stabilizer bar and the length and the position of the suspension stabilizer bar connecting rod are redesigned until the safety gap requirement is met.
By implementing the embodiment of the invention, the space of the automobile suspension in which the suspension stabilizer bar can be arranged under the existing conditions can be rapidly and accurately calculated, and the shape and the position of the suspension stabilizer bar are determined in the space, so that only the judgment on whether the clearance between the suspension stabilizer bar and each relevant part motion envelope of the automobile suspension meets the preset safety clearance requirement is needed, and no motion check is needed between the suspension stabilizer bar and each relevant part of the automobile suspension one by one, therefore, the design steps of the suspension stabilizer bar are simplified, the design period is shortened, and the design level of the shape of the suspension stabilizer bar is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is within the scope of the present invention for those skilled in the art to obtain other drawings based on the drawings without inventive exercise.
FIG. 1 is a flow chart of a method for designing a stabilizer bar for a suspension of an automobile according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a system for designing a stabilizer bar of an automotive suspension according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, in an embodiment of the present invention, a method for designing a stabilizer bar of a suspension of an automobile is provided, the method comprising the steps of:
step S101, setting the mounting position of a suspension stabilizer bar and the length and position data of a suspension stabilizer bar connecting rod according to the shape and the mounting position of each relevant part of a predefined automobile suspension;
before step S101, the shapes and installation positions of the relevant parts of the automobile suspension and the safety clearance between the relevant parts of the automobile suspension and the suspension stabilizer bar, that is, the minimum clearance between the suspension stabilizer bar and the relevant parts of the automobile suspension, which do not interfere with each other, are defined in advance. The safety clearance between each relevant part of automobile suspension and the suspension stabilizer bar can be different according to actual requirements.
The method comprises the steps of fixing an automobile wheel in a certain state, enabling all parts of an automobile suspension to be relatively static, defining shapes, lengths, position coordinates and the like of the parts of the automobile suspension and safety gaps between the parts of the automobile suspension and a suspension stabilizer bar, then carrying out arrangement work of the suspension stabilizer bar, and setting installation positions of the suspension stabilizer bar and length and position data of the suspension stabilizer bar.
Step S102, establishing a DMU model according to the installation position of the set suspension stabilizer bar and the length and position data of the suspension stabilizer bar connecting rod, and obtaining the motion envelope of each relevant part of the automobile suspension relative to the suspension stabilizer bar according to the DMU model;
and (4) establishing a DMU model in design software according to the installation position of the suspension stabilizer bar and the length and position data of the suspension stabilizer bar in the step (S101) for analysis, operating the DMU model, and obtaining the motion envelope of each relevant part of the automobile suspension relative to the suspension stabilizer bar. The design software not only includes Computer Aided three-Dimensional Interactive Application (CATIA) software, but also includes other design software that can realize the same or similar functions as the CATIA software.
In the embodiment of the invention, a DMU model can be established by CATIA design software, and the motion envelope of each suspension part can be obtained by recording each position of each relevant part of an automobile suspension in the motion process, wherein the fixed part in the motion process is a suspension stabilizer bar, and the fixed parts of other common DMU models are automobile bodies.
Step S103, superposing the generated motion envelopes to obtain a maximum motion envelope, setting the shape of the suspension stabilizer bar according to the maximum motion envelope, and obtaining a gap between the suspension stabilizer bar and the maximum motion envelope according to the shape of the suspension stabilizer bar;
the generated motion envelopes are superposed together to obtain a maximum motion envelope, the maximum motion envelope is analyzed through a DMU model, a space where the suspension stabilizer bar can be arranged is obtained, a designer can set the shape of the suspension stabilizer bar in the space, and after the shape design of the suspension stabilizer bar is completed, each gap between the suspension stabilizer bar and the maximum motion envelope, namely the gap between each relevant part of the automobile suspension and the suspension stabilizer bar, is measured by using a measuring tool in design software.
Step S104, judging whether any gap between the suspension stabilizer bar and the maximum motion envelope is larger than a predefined safety gap, if so, operating the next step S105, otherwise, operating the next step S106 and returning to the step S102.
In this step, if the predefined safety gaps between the components and the suspension stabilizer bar are different, it is necessary to determine whether any gap between the suspension stabilizer bar and the maximum motion envelope is correspondingly larger than the predefined safety gap between the relevant components and the suspension stabilizer bar of the automotive suspension.
And S105, obtaining the shape and the installation position of the suspension stabilizer bar and the length and the position of the suspension stabilizer bar.
And S106, resetting the mounting position of the suspension stabilizer bar and the length and position data of the suspension stabilizer bar.
In the embodiment of the present invention, it is determined whether any gap between the suspension stabilizer bar and the maximum motion envelope meets the preset safety gap requirement, wherein the gaps between the suspension stabilizer bar and the motion envelopes of the relevant parts of the automotive suspension need to be checked in a one-to-one correspondence manner, and if one of the gaps is smaller than the preset safety gap, the operation step S106 is required: the method returns to the step S102 after resetting the installation position of the suspension stabilizer bar and the length and position data of the suspension stabilizer bar, rearranges the suspension stabilizer bar, resets the shape of the suspension stabilizer bar and rechecks the gap between the suspension stabilizer bar and the motion envelopes of all relevant parts of the automobile suspension until any obtained gap is correspondingly larger than the predefined safety gap between the relevant parts of the automobile suspension and the suspension stabilizer bar, namely the requirement of the minimum gap that the relevant parts of the suspension stabilizer bar and the automobile suspension do not interfere with each other is met, so the shape and the position of the suspension stabilizer bar can be quickly determined in a short period. And the fixing piece of other common DMU models is the automobile body, so when the gap between the maximum motion envelopes obtained by superposing the motion envelopes of the suspension stabilizer bar and the relevant parts of the automobile suspension is judged, motion check needs to be carried out between the suspension stabilizer bar and the relevant parts of the automobile suspension one by one, the workload is large, the period is long, and the shape and the position of the suspension stabilizer bar are difficult to determine.
In the embodiment of the present invention, the shape and the mounting position of each relevant part of the automobile suspension and the safety clearance between each relevant part of the automobile suspension and the suspension stabilizer bar are defined in advance, and the mounting position of the suspension stabilizer bar and the length and the position of the suspension stabilizer bar link are arranged according to the above-mentioned predefined conditions. After arrangement is completed, a DMU (Digital Mock-Up) model is established, the DMU model is driven, the motion envelopes of all relevant parts of the automobile suspension relative to the suspension stabilizer bar are obtained, the obtained motion envelopes are superposed together to obtain a maximum motion envelope, the arrangement space of the suspension stabilizer bar is obtained according to the maximum motion envelope, the shape of the suspension stabilizer bar is designed in the space, whether any gap between the suspension stabilizer bar and the maximum motion envelope (namely the gap between the suspension stabilizer bar and the motion envelopes of all relevant parts of the automobile suspension) meets the safety gap between all relevant parts of the automobile suspension and the suspension stabilizer bar or not is judged, if not, the shape of the suspension stabilizer bar and the length and the position of the suspension stabilizer bar connecting rod are redesigned until the safety gap requirement is met.
By implementing the embodiment of the invention, the space of the automobile suspension in which the suspension stabilizer bar can be arranged under the existing conditions can be rapidly and accurately calculated, and the shape and the position of the suspension stabilizer bar are determined in the space, so that only the judgment on whether the clearance between the suspension stabilizer bar and each relevant part motion envelope of the automobile suspension meets the preset safety clearance requirement is needed, and no motion check is needed between the suspension stabilizer bar and each relevant part of the automobile suspension one by one, therefore, the design steps of the suspension stabilizer bar are simplified, the design period is shortened, and the design level of the shape of the suspension stabilizer bar is improved.
As shown in fig. 2, in an embodiment of the present invention, a system for designing a stabilizer bar of a suspension of an automobile is further provided, where the system includes: a setting unit 220, a first acquiring unit 230, a second acquiring unit 240, a judging unit 250, and a third acquiring unit 260; wherein,
the setting unit 220 is used for setting the mounting position of the suspension stabilizer bar and the length and position data of the suspension stabilizer bar according to the shape and the mounting position of each relevant part of the automobile suspension defined in advance;
the first obtaining unit 230 is configured to establish a DMU model according to the mounting position data of the suspension stabilizer bar and the length and position data of the connecting rod, and obtain a motion envelope of each relevant component of the automobile suspension relative to the suspension stabilizer bar according to the DMU model;
the second obtaining unit 240 is configured to superimpose the generated motion envelopes to obtain a maximum motion envelope, set a shape of the suspension stabilizer bar according to the maximum motion envelope, and obtain a gap between the suspension stabilizer bar and the maximum motion envelope according to the shape of the suspension stabilizer bar;
the judging unit 250 is configured to judge whether any gap between the suspension stabilizer bar and the maximum motion envelope is larger than a predefined safety gap;
the third obtaining unit 260 is configured to obtain a shape and an installation position of the suspension stabilizer bar and a length and a position of the suspension stabilizer bar.
The system further comprises: the preset unit 210 is used for predefining the shape and the installation position of each relevant part of the automobile suspension and the safety clearance between each relevant part of the automobile suspension and the suspension stabilizer bar.
In the embodiment of the present invention, a system for designing a suspension stabilizer bar of an automobile first pre-defines the shape and the installation position of each relevant part of the automobile suspension and the safety gap between each relevant part of the automobile suspension and the suspension stabilizer bar in a pre-setting unit 210, and sets the installation position of the suspension stabilizer bar and the length and the position data of the suspension stabilizer bar in a setting unit 220 according to the pre-defined shape and the installation position of each relevant part of the automobile suspension; secondly, according to the set data, a DMU model is established, and motion envelopes of various relevant parts of the automobile suspension relative to the suspension stabilizer bar are obtained in the first obtaining unit 230 according to the DMU model; next, the generated motion envelopes are superimposed to obtain a maximum motion envelope, the shape of the suspension stabilizer bar is set according to the maximum motion envelope, and a gap between the suspension stabilizer bar and the maximum motion envelope is obtained in the second obtaining unit 240 according to the shape of the suspension stabilizer bar; then, it is judged whether any gap between the suspension stabilizer bar and the maximum motion envelope is larger than the predefined safety gap according to the judging unit 250, if yes, the shape and the installation position of the suspension stabilizer bar and the length and the position of the suspension stabilizer bar link are obtained in the third acquiring unit 260, if not, the installation position of the suspension stabilizer bar and the length and the position data of the suspension stabilizer bar link are reset and then returned to the first acquiring unit 230 until the gaps between the suspension stabilizer bar and the motion envelopes of the relevant parts of the automobile suspension meet the predefined safety gap requirement.
It should be noted that, in the foregoing system embodiment, each included system unit is only divided according to functional logic, but is not limited to the above division as long as the corresponding function can be implemented; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
It will be understood by those skilled in the art that all or part of the steps in the method for implementing the above embodiments may be implemented by relevant hardware instructed by a program, and the program may be stored in a computer-readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. A method of designing a stabilizer bar for a suspension of an automobile, the method comprising:
a. setting the mounting position of a suspension stabilizer bar and the length and position data of a suspension stabilizer bar connecting rod according to the shape and the mounting position of each related part of a predefined automobile suspension;
b. establishing a DMU model according to the mounting position data of the suspension stabilizer bar and the length and position data of the connecting rod, and acquiring the motion envelope of each relevant part of the automobile suspension relative to the suspension stabilizer bar according to the DMU model;
c. superposing the generated motion envelopes to obtain a maximum motion envelope, setting the shape of the suspension stabilizer bar according to the maximum motion envelope, and obtaining a gap between the suspension stabilizer bar and the maximum motion envelope according to the shape of the suspension stabilizer bar;
d. judging whether any gap between the suspension stabilizer bar and the maximum motion envelope is larger than a predefined safety gap, and if so, operating the next step e; if not, resetting the mounting position of the suspension stabilizer bar and the length and position data of the suspension stabilizer bar connecting rod, and returning to the step b;
e. obtaining the shape and the installation position of the suspension stabilizer bar and the length and the position of the suspension stabilizer bar;
wherein the step c of superimposing the generated motion envelopes to obtain a maximum motion envelope according to which the suspension stabilizer bar is shaped includes:
and superposing the generated motion envelopes to obtain a maximum motion envelope, obtaining a space where the suspension stabilizer bar can be arranged according to the maximum motion envelope, and arranging the shape of the suspension stabilizer bar in the space.
2. The method of claim 1, wherein prior to step a, the method further comprises the steps of: the shapes and the installation positions of all relevant parts of the automobile suspension and the safety clearance between the relevant parts of the automobile suspension and the suspension stabilizer bar are predefined.
3. The method of claim 2, wherein determining whether any gap between the suspension stabilizer bar and the maximum motion envelope is greater than a predefined safety gap in step d comprises:
and judging whether any gap between the suspension stabilizer bar and the maximum motion envelope is correspondingly larger than a predefined safety gap between each relevant part of the automobile suspension and the suspension stabilizer bar.
4. The method of claim 2, wherein the vehicle suspension components include a subframe, a control arm, and a shock absorber.
5. A system for designing a suspension stabilizer bar for an automobile, the system comprising: the device comprises a setting unit, a first acquiring unit, a second acquiring unit, a judging unit and a third acquiring unit; wherein,
the setting unit is used for setting the mounting position of the suspension stabilizer bar and the length and position data of the suspension stabilizer bar connecting rod according to the shape and the mounting position of each related part of the automobile suspension defined in advance;
the first acquisition unit is used for establishing a DMU model according to the mounting position data of the suspension stabilizer bar and the length and position data of the connecting rod, and acquiring the motion envelope of each relevant part of the automobile suspension relative to the suspension stabilizer bar according to the DMU model;
the second acquisition unit is used for superposing the generated motion envelopes to obtain a maximum motion envelope, setting the shape of the suspension stabilizer bar according to the maximum motion envelope, and obtaining a gap between the suspension stabilizer bar and the maximum motion envelope according to the shape of the suspension stabilizer bar;
the judging unit is used for judging whether any gap between the suspension stabilizer bar and the maximum motion envelope is larger than a predefined safety gap;
the third acquisition unit is configured to acquire the shape and the mounting position of the suspension stabilizer bar and the length and the position of the suspension stabilizer bar link.
6. The system of claim 5, further comprising a preset unit;
the preset unit is used for predefining the shape and the installation position of each relevant part of the automobile suspension and the safety clearance between each relevant part of the automobile suspension and the suspension stabilizer bar.
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| CN201310649152.XA CN104691269B (en) | 2013-12-06 | 2013-12-06 | Method and system for designing stabilizer bar of automotive suspension |
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| CN201310649152.XA CN104691269B (en) | 2013-12-06 | 2013-12-06 | Method and system for designing stabilizer bar of automotive suspension |
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| CN105082925B (en) * | 2015-09-18 | 2017-06-06 | 北汽福田汽车股份有限公司 | Stabilizer bar connecting bar and its manufacture method and vehicle |
| CN112339884B (en) * | 2020-09-25 | 2021-10-29 | 广州汽车集团股份有限公司 | Stabilizer bar arrangement position determining method and device and readable storage medium |
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| JP2003167940A (en) * | 2001-11-29 | 2003-06-13 | Nissan Motor Co Ltd | Design method of positioning tool |
| JP2003228595A (en) * | 2002-02-05 | 2003-08-15 | Matsushita Electric Ind Co Ltd | Database and method for designing integrated circuit device |
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