CN113297681A - Optimization method and system for vehicle steering input yaw response over-slow problem - Google Patents
Optimization method and system for vehicle steering input yaw response over-slow problem Download PDFInfo
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- CN113297681A CN113297681A CN202110691283.9A CN202110691283A CN113297681A CN 113297681 A CN113297681 A CN 113297681A CN 202110691283 A CN202110691283 A CN 202110691283A CN 113297681 A CN113297681 A CN 113297681A
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Abstract
The invention discloses a method and a system for optimizing a problem of slow yaw response of vehicle steering input, wherein the method comprises the following steps: obtaining the vehicle reaction condition after steering input; judging the specific position of the vehicle body where the problem occurs according to the acquired vehicle reaction condition after the steering input; acquiring a vehicle side-tipping working condition, a vehicle running speed and a vehicle steering input response speed change working condition; acquiring an analysis characteristic type of a problem according to a vehicle side-tipping working condition, a vehicle running speed and a vehicle steering input response speed change working condition; and acquiring the specific position of the part where the vehicle steering input yaw response over-slow problem occurs according to the specific position of the vehicle body where the acquired vehicle yaw response over-slow problem occurs and the acquired analysis characteristic type of the vehicle input yaw response over-slow problem. The optimization method for the problem that the yaw response of the vehicle steering input is too slow can quickly check and position the problem point of the problem that the yaw response is too slow, and is favorable for quickly and accurately solving the problem.
Description
Technical Field
The invention relates to the technical field of vehicle yaw response, in particular to a method and a system for optimizing a problem that vehicle steering input yaw response is too slow.
Background
In vehicle development, the problem of too slow yaw response of the steering input often occurs, the response to the steering input is slow, and the whole vehicle is rather dull.
The prior art discloses a yaw stability control method for the non-linear characteristic of an automobile, which comprises a reference model, a tire lateral force and lateral deflection stiffness processor, an MPC controller and a Carsim automobile model. The reference model is used to determine a desired yaw rate of the vehicle; a tire lateral force and cornering stiffness processor for determining a cornering angle, a lateral force and a cornering stiffness of the tire; the CarSim automobile model is used for outputting actual motion state information of an automobile, wherein the actual motion state information comprises automobile longitudinal speed, yaw velocity, mass center slip angle and road adhesion coefficient; the MPC controller selects a prediction model according to the cornering stiffness of the tire, optimally solves the additional turning angle of the front wheel of the automobile by combining the expected yaw rate of the automobile and the actual motion state information of the automobile, superposes the additional turning angle of the front wheel generated by the steering input of a driver, outputs the additional turning angle and the front wheel turning angle to the CarSim automobile model, and controls the automobile to realize yaw stability control. The technical problem solved by the technical scheme is to improve the stability of the yaw control of the automobile, not to improve the response speed of the steering input yaw and reduce the response time.
Disclosure of Invention
The invention aims to overcome the defects of the background technology and provide a method for optimizing the problem that the response of the vehicle steering input yaw is too slow.
In a first aspect, the present invention provides a method for optimizing a vehicle steering input yaw response slowness problem, comprising the steps of:
obtaining the vehicle reaction condition after steering input;
judging the specific position of the vehicle body where the problem of too slow response of the vehicle yaw occurs according to the acquired vehicle reaction condition after the steering input;
acquiring a vehicle side-tipping working condition, a vehicle running speed and a vehicle steering input response speed change working condition;
according to the vehicle roll working condition, the vehicle running speed and the vehicle steering input response speed change working condition, obtaining an analysis characteristic type of the problem that the vehicle input yaw response is too slow, wherein the analysis characteristic type comprises a kinematics characteristic and a smoothness characteristic;
and acquiring the specific position of the part where the vehicle steering input yaw response over-slow problem occurs according to the specific position of the vehicle body where the acquired vehicle yaw response over-slow problem occurs and the acquired analysis characteristic type of the vehicle input yaw response over-slow problem.
According to the first aspect, in a first possible implementation manner of the first aspect, the step of "determining that the vehicle yaw response too slow problem occurs at a specific position of the vehicle body according to the obtained vehicle reaction condition after the steering input" specifically includes the following steps:
after the steering input, the vehicle head generates steering action after the preset waiting time is exceeded, and the problem that the vehicle yaw response is too slow is judged to occur on the front axle;
after the steering input, the head of the vehicle immediately generates steering action, and after the preset waiting time is exceeded, the tail of the vehicle generates steering action, so that the problem that the yaw response is too slow is judged to occur on the rear axle.
According to the first aspect, in a second possible implementation manner of the first aspect, the step of obtaining the analysis characteristic type of the problem that the vehicle input yaw response is too slow according to the vehicle roll condition, the vehicle running speed and the vehicle steering input response speed change condition specifically includes the following steps:
when the vehicle rolls, the steering input speed of the vehicle is slowed, and the analysis characteristic type of the problem that the input yaw response of the vehicle is too slow is judged to be a kinematics characteristic;
when the vehicle is in a low-speed running non-roll working condition and the steering input response speed of the vehicle is lower than a preset speed, judging that the analysis characteristic type of the problem that the input yaw response of the vehicle is too slow is a smooth characteristic;
when the vehicle has a roll working condition and the change value of the vehicle steering input speed is smaller than the preset speed change, the analysis characteristic type of the problem that the vehicle input yaw response is too slow is judged to be a smooth characteristic.
According to the first aspect, in a third possible implementation manner of the first aspect, the step of obtaining that the vehicle steering input yaw response too slow problem occurs at the specific position of the part according to the obtained specific position of the vehicle body where the vehicle yaw response too slow problem occurs and the obtained analysis characteristic type of the vehicle input yaw response too slow problem specifically comprises the following steps:
when the analysis characteristic type of the problem that the input yaw response of the vehicle is too slow is a kinematics characteristic, acquiring hard point measurement data at a specific vehicle body position;
and acquiring the problem that the yaw response of the vehicle steering input is too slow at a specific position of a part according to the acquired hard point measurement data at the specific position of the vehicle body.
According to the third possible implementation manner of the first aspect, in the fourth possible implementation manner of the first aspect, the step of obtaining that the vehicle steering input yaw response too slow problem occurs at the specific position of the part according to the obtained specific position of the vehicle body where the vehicle yaw response too slow problem occurs and the obtained analysis characteristic type of the vehicle input yaw response too slow problem further specifically comprises the following steps:
when the analysis characteristic type of the problem that the input yaw response of the vehicle is too slow is a smooth characteristic, acquiring aligning moment data and lateral force steering data of the vehicle;
comparing the acquired vehicle aligning torque data with the lateral force steering data and aligning torque data and lateral force steering data of a preset stored vehicle type to acquire a first comparison result;
according to the obtained first comparison result, obtaining a moment steering type of the problem that the yaw response of the vehicle steering input is too slow;
and acquiring the specific position of the part where the vehicle steering input yaw response is too slow according to the acquired torque steering type where the vehicle steering input yaw response is too slow.
According to a fourth possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, the step of obtaining that the vehicle steering input yaw response too slow problem occurs at a specific position of the part according to the obtained type of the moment steering where the vehicle steering input yaw response too slow problem occurs includes the following steps:
when the torque steering type generated by the problem that the yaw response is too slow when the vehicle steering input is a aligning torque, acquiring an influence factor of a component variable related to the aligning torque;
and acquiring the specific position of the part where the vehicle steering input yaw response is too slow according to the acquired influence factor of the aligning moment related part variable.
According to a fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, the step of obtaining that the vehicle steering input yaw response too slow problem occurs at a specific position of the part according to the obtained type of the moment steering where the vehicle steering input yaw response too slow problem occurs further specifically includes the following steps:
when the moment steering type generated by the problem that the yaw response is too slow when the vehicle steering input is lateral force, acquiring an influence factor of a lateral force related part variable;
and acquiring the specific position of the part where the vehicle steering input yaw response is too slow according to the acquired influence factor of the lateral force related part variable.
In a seventh possible implementation manner of the first aspect, after the step of obtaining that the vehicle steering input yaw response too slow problem occurs at the specific position of the part according to the type of the analysis characteristic that the obtained vehicle yaw response too slow problem occurs at the specific position of the vehicle body and the obtained vehicle input yaw response too slow problem, the method further comprises the following steps:
and optimizing the structure of the part.
According to a seventh possible implementation manner of the first aspect, in an eighth possible implementation manner of the first aspect, after the step of "optimizing the structure of the part", the method further includes the following steps:
and verifying the optimization effect of the part with the optimized structure.
In a second aspect, the present invention provides a system for solving the problem of too slow yaw response of a vehicle steering input based on K & C measurement and simulation means, comprising:
the vehicle reaction condition acquisition module is used for acquiring the vehicle reaction condition after steering input;
the vehicle body position analysis and acquisition module is in communication connection with the vehicle reaction condition acquisition module and is used for judging that the problem of too slow vehicle yaw response occurs at the specific position of the vehicle body according to the acquired vehicle reaction condition after steering input;
the vehicle roll working condition acquisition module is used for acquiring a vehicle roll working condition, a vehicle running speed and a vehicle steering input response speed change working condition;
the characteristic type acquisition module is in communication connection with the vehicle roll working condition acquisition module and is used for acquiring the analysis characteristic type of the problem that the vehicle input yaw response is too slow according to the vehicle roll working condition, the vehicle running speed and the vehicle steering input response speed change working condition;
and the part position acquisition module is in communication connection with the vehicle body position analysis acquisition module and the characteristic type acquisition module and is used for acquiring the specific position of the vehicle steering input yaw response over-slow problem according to the specific position of the vehicle body where the acquired vehicle yaw response over-slow problem occurs and the acquired analysis characteristic type of the vehicle input yaw response over-slow problem.
Compared with the prior art, the invention has the following advantages:
the optimization method for the problem that the yaw response of the vehicle steering input is too slow can quickly check and position the problem point of the problem that the yaw response is too slow, and is favorable for quickly and accurately solving the problem.
Drawings
FIG. 1 is a method flow diagram of a vehicle steering input yaw response over-slow problem optimization method of the present invention;
FIG. 2 is another method flow diagram of the vehicle steering input yaw response over-slow problem optimization method of the present invention;
FIG. 3 is another method flow diagram of the vehicle steering input yaw response over-slow problem optimization method of the present invention;
fig. 4 is a functional block diagram of a system for solving the problem of too slow a yaw response of a vehicle steering input according to the present invention.
In the figure, 100, a vehicle reaction condition obtaining module; 200. a vehicle body position analysis and acquisition module; 300. a vehicle roll condition acquisition module; 400. a characteristic type obtaining module; 500. and a part position acquisition module.
Detailed Description
Reference will now be made in detail to the present embodiments of the invention, examples of which are illustrated in the accompanying drawings. While the invention will be described in conjunction with the specific embodiments, it will be understood that they are not intended to limit the invention to the embodiments described. On the contrary, it is intended to cover alternatives, modifications, and equivalents as may be included within the spirit and scope of the invention as defined by the appended claims. It should be noted that the method steps described herein may be implemented by any functional block or functional arrangement, and that any functional block or functional arrangement may be implemented as a physical entity or a logical entity, or a combination of both.
In order that those skilled in the art will better understand the present invention, the following detailed description of the invention is provided in conjunction with the accompanying drawings and the detailed description of the invention.
Note that: the example to be described next is only a specific example, and does not limit the embodiments of the present invention necessarily to the following specific steps, values, conditions, data, orders, and the like. Those skilled in the art can, upon reading this specification, utilize the concepts of the present invention to construct more embodiments than those specifically described herein.
Referring to fig. 1, an embodiment of the present invention provides a method for optimizing a vehicle steering input yaw response slowness problem, including the following steps:
s100, obtaining a vehicle reaction condition after steering input;
s200, judging the specific position of the vehicle body where the problem of too slow response of the vehicle yaw occurs according to the acquired vehicle reaction condition after the steering input;
s300, acquiring a vehicle side-tipping working condition, a vehicle running speed and a vehicle steering input response speed change working condition;
s400, acquiring an analysis characteristic type of the problem that the response speed of the vehicle input yaw is too slow according to the vehicle roll working condition, the vehicle running speed and the vehicle steering input response speed change working condition;
and S500, acquiring the specific position of the part where the vehicle steering input yaw response over-slow problem occurs according to the specific position of the vehicle body where the acquired vehicle yaw response over-slow problem occurs and the acquired analysis characteristic type of the vehicle input yaw response over-slow problem.
The optimization method for the problem that the yaw response of the vehicle steering input is too slow can quickly check and position the problem point of the problem that the yaw response is too slow, and is favorable for quickly and accurately solving the problem.
As described above, according to the present application, the analysis characteristic types include a kinematic characteristic that does not consider the movement of force and mass but only the movement of the wheel in association with the suspension link, and a smooth characteristic that is the movement of the wheel in association with the deformation of the spring, rubber, and parts of the suspension due to the deformation caused by the applied force.
In an embodiment, referring to fig. 2, the step of "S200, determining that the vehicle yaw response too slow problem occurs at a specific position of the vehicle body according to the obtained vehicle reaction condition after the steering input" specifically includes the following steps:
s210, after the steering input is carried out, the vehicle head generates steering action after the preset waiting time is exceeded, and the problem that the vehicle yaw response is too slow is judged to occur on a front axle, namely a front axle;
and S220, after the steering input is carried out, the head of the vehicle immediately generates steering action, and after the preset waiting time is exceeded, the tail of the vehicle generates steering action, so that the problem that the yaw response is too slow is judged to occur on a rear axle, namely a rear axle.
In one embodiment, the preset waiting time is 3min or 5min, which is a time that generates a significant steering waiting feeling.
In an embodiment, referring to fig. 3, the step of "S400, obtaining an analysis characteristic type of the vehicle yaw response too slow according to a vehicle roll condition, a vehicle running speed, and a vehicle steering input response speed change condition" specifically includes the following steps:
s410, when the vehicle rolls, the steering input speed of the vehicle becomes slow, the analysis characteristic type of the problem that the response of the input yaw of the vehicle is too slow is judged to be the kinematics characteristic, and the kinematics characteristic of the vehicle needs to be further analyzed;
s421, when the vehicle is in a low-speed running non-rolling working condition and the steering input response speed of the vehicle is lower than a preset speed, judging that the analysis characteristic type of the problem that the input yaw response of the vehicle is too slow is a smooth characteristic;
and S422, whether the vehicle has a roll working condition or not, when the change value of the vehicle steering input speed is smaller than the preset speed change, namely the vehicle steering input speed has no obvious change, judging that the analysis characteristic type of the problem that the vehicle input yaw response is too slow is a smooth characteristic, and further analyzing the smooth characteristic of the vehicle.
In one embodiment, the step of obtaining the specific position of the part where the vehicle steering input yaw response too slow problem occurs according to the specific position of the vehicle body where the obtained vehicle yaw response too slow problem occurs and the obtained analysis characteristic type of the vehicle input yaw response too slow problem specifically comprises the following steps:
when the analysis characteristic type of the problem that the input yaw response of the vehicle is too slow is a kinematics characteristic, acquiring hard point measurement data at a specific vehicle body position, wherein the hard point is a point determining the kinematics characteristic of the suspension in the suspension and comprises a key mounting point, a kinematic hinge central point, a bushing central point, a wheel central point, an inner point and an outer point of a swing arm, an inner point and an outer point of a steering pull rod, a mounting point of a shock absorber and the like;
and acquiring the problem that the yaw response of the vehicle steering input is too slow at a specific position of a part according to the acquired hard point measurement data at the specific position of the vehicle body.
In one embodiment, a KC test database is established, wherein vehicle hard spot simulation test data, smoothness characteristics and kinematics characteristic related simulation test data are obtained through simulation tests, as shown in Table 1. Furthermore, according to a large amount of simulation test data, a numerical range of relevant hard points is given, and a standard EQCT-1009-. And (3) drawing a curve by using the acquired hard point measurement data at the specific vehicle body position, namely the hard point measurement data of the front axle or the rear axle, and comparing the hard point measurement data with the hard point simulation test data, wherein if a certain hard point measurement data curve is obviously deviated from the hard point simulation test data curve, the hard point is determined to be a problem point of the problem that the yaw response of the vehicle steering input is too slow.
TABLE 1 comparison table of various parameters of different vehicle types
In one embodiment, the step of obtaining the specific position of the vehicle steering input yaw response over-slow problem occurring in the part according to the specific position of the vehicle body where the obtained vehicle yaw response over-slow problem occurs and the obtained analysis characteristic type of the vehicle input yaw response over-slow problem further comprises the following steps:
when the analysis characteristic type of the problem that the input yaw response of the vehicle is too slow is a smooth characteristic, acquiring aligning moment data and lateral force steering data of the vehicle;
comparing the acquired vehicle aligning torque data with the lateral force steering data and aligning torque data and lateral force steering data of a preset stored vehicle type to acquire a first comparison result;
according to the obtained first comparison result, obtaining a moment steering type of the problem that the yaw response of the vehicle steering input is too slow;
and acquiring the specific position of the part where the vehicle steering input yaw response is too slow according to the acquired torque steering type where the vehicle steering input yaw response is too slow.
As described above, the torque steering types include return torque steering and lateral force steering.
In one embodiment, the step of obtaining that the vehicle steering input yaw response too slow problem occurs at a specific position of a part according to the obtained type of torque steering where the vehicle steering input yaw response too slow problem occurs comprises the following steps:
when the torque steering type generated by the problem that the yaw response is too slow when the vehicle steering input is a aligning torque, acquiring an influence factor of a component variable related to the aligning torque;
and acquiring the specific position of the part where the vehicle steering input yaw response is too slow according to the acquired influence factor of the aligning moment related part variable.
In one embodiment, the step of obtaining the specific position of the part where the vehicle steering input yaw response too slow problem occurs according to the obtained type of the moment steering where the vehicle steering input yaw response too slow problem occurs includes the following steps:
when the moment steering type generated by the problem that the yaw response is too slow when the vehicle steering input is lateral force, acquiring an influence factor of a lateral force related part variable;
and acquiring the specific position of the part where the vehicle steering input yaw response is too slow according to the acquired influence factor of the lateral force related part variable.
In an embodiment, after the step of obtaining that the vehicle steering input yaw response too slow problem occurs at the specific position of the part according to the specific position of the vehicle body where the obtained vehicle yaw response too slow problem occurs and the analysis characteristic type of the obtained vehicle input yaw response too slow problem, the method further comprises the following steps:
and optimizing the structure of the part.
In one embodiment, after the step of "optimizing the structure of the part", the method further includes the following steps:
and verifying the optimization effect of the part with the optimized structure.
In one embodiment, when the type of torque steering where the vehicle steering input yaw response is too slow is a aligning torque, the CAE sensitivity analysis is used to find out the effect of key part variables on KC aligning torque steering, such as: and the key part variables of the front hinge joint of the triangular arm, the rear hinge joint of the triangular arm, the mounting hinge joint of the steering engine and the mounting hinge joint of the shock absorber are found to have the greatest influence, wherein the sensitivity to the mounting hinge joint of the steering engine is highest.
And the mounting hinge rigidity of the steering engine, which is the factor influencing the maximum factor, is improved.
And then, optimizing the rubber hinge rigidity of the steering engine mounting hinge by using ADAMS (automatic dynamic analysis of mechanical systems), and manufacturing sample loading vehicles with at least 3 groups of different parameter characteristics in high, medium and low levels.
Finally, the optimization effect is confirmed as shown in table 2, the overall vehicle and system parameters are measured, summarized and judged through objective tests, and the result is confirmed according to subjective and objective data as shown in table 3.
Table 2 evaluation table for optimized structure
TABLE 3 comparison table of parameters before and after structure optimization
In one embodiment, when the type of torque steering in which the problem of too slow yaw response of the vehicle steering input is caused is a lateral force, the optimization effect verification is performed by using the method described above.
Based on the same inventive concept, please refer to fig. 4, the invention provides a system for solving the problem of too slow response of yaw input of vehicle steering based on K & C measurement and simulation means, comprising a vehicle reaction condition acquisition module 100, a vehicle body position analysis acquisition module 200, a vehicle roll condition acquisition module 300, a characteristic type acquisition module 400 and a part position acquisition module 500, wherein the vehicle reaction condition acquisition module 100 is used for acquiring the vehicle reaction condition after steering input; the vehicle body position analysis and acquisition module 200 is in communication connection with the vehicle reaction condition acquisition module 100 and is used for judging that the problem of too slow vehicle yaw response occurs at a specific position of a vehicle body according to the acquired vehicle reaction condition after steering input; the vehicle roll condition acquiring module 300 is used for acquiring a vehicle roll condition, a vehicle running speed and a vehicle steering input response speed change condition; the characteristic type obtaining module 400 is in communication connection with the vehicle rolling condition obtaining module 300, and is configured to obtain an analysis characteristic type of the problem that the vehicle input yaw response is too slow according to a vehicle rolling condition, a vehicle running speed, and a vehicle steering input response speed change condition; and a part position obtaining module 500, which is in communication connection with the vehicle body position analysis obtaining module 200 and the characteristic type obtaining module 400, and is used for obtaining the specific position of the part where the vehicle steering input yaw response is too slow according to the specific position of the vehicle body where the obtained vehicle yaw response is too slow and the obtained analysis characteristic type of the vehicle input yaw response is too slow.
Based on the same inventive concept, the embodiments of the present application further provide a computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements all or part of the method steps of the above method.
The present invention can implement all or part of the processes of the above methods, and can also be implemented by using a computer program to instruct related hardware, where the computer program can be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps of the above method embodiments can be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying computer program code, recording medium, U-disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution media, and the like. It should be noted that the computer readable medium may contain other components which may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, in accordance with legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunications signals.
Based on the same inventive concept, an embodiment of the present application further provides an electronic device, which includes a memory and a processor, where the memory stores a computer program running on the processor, and the processor executes the computer program to implement all or part of the method steps in the method.
The processor may be a Central Processing Unit (CP U), or may be other general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, or the like. The general purpose processor may be a microprocessor or the processor may be any conventional processor or the like, the processor being the control center of the computer device and the various interfaces and lines connecting the various parts of the overall computer device.
The memory may be used to store computer programs and/or modules, and the processor may implement various functions of the computer device by executing or executing the computer programs and/or modules stored in the memory, as well as by invoking data stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (e.g., a sound playing function, an image playing function, etc.); the storage data area may store data (e.g., audio data, video data, etc.) created according to the use of the cellular phone. In addition, the memory may include high speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a flash memory Card (flash Card), at least one magnetic disk storage device, a flash memory device, or other volatile solid state storage device.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, server, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), servers and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A method for optimizing a vehicle steering input yaw response slowness problem is characterized by comprising the following steps of:
obtaining the vehicle reaction condition after steering input;
judging the specific position of the vehicle body where the problem of too slow response of the vehicle yaw occurs according to the acquired vehicle reaction condition after the steering input;
acquiring a vehicle side-tipping working condition, a vehicle running speed and a vehicle steering input response speed change working condition;
according to the vehicle roll working condition, the vehicle running speed and the vehicle steering input response speed change working condition, obtaining an analysis characteristic type of the problem that the vehicle input yaw response is too slow, wherein the analysis characteristic type comprises a kinematics characteristic and a smoothness characteristic;
and acquiring the specific position of the part where the vehicle steering input yaw response over-slow problem occurs according to the specific position of the vehicle body where the acquired vehicle yaw response over-slow problem occurs and the acquired analysis characteristic type of the vehicle input yaw response over-slow problem.
2. The method for optimizing the vehicle steering input yaw response over-slow problem according to claim 1, wherein the step of judging that the vehicle yaw response over-slow problem occurs at a specific position of the vehicle body according to the obtained vehicle reaction condition after the steering input comprises the following steps:
after the steering input, the vehicle head generates steering action after the preset waiting time is exceeded, and the problem that the vehicle yaw response is too slow is judged to occur on the front axle;
after the steering input, the head of the vehicle immediately generates steering action, and after the preset waiting time is exceeded, the tail of the vehicle generates steering action, so that the problem that the yaw response is too slow is judged to occur on the rear axle.
3. The method for optimizing the vehicle steering input yaw response too slow as claimed in claim 1, wherein the step of obtaining the type of the analysis characteristic of the vehicle input yaw response too slow according to the vehicle rolling condition, the vehicle running speed and the vehicle steering input response speed change condition comprises the following steps:
when the vehicle rolls, the steering input speed of the vehicle is slowed, and the analysis characteristic type of the problem that the input yaw response of the vehicle is too slow is judged to be a kinematics characteristic;
when the vehicle is in a low-speed running non-roll working condition and the steering input response speed of the vehicle is lower than a preset speed, judging that the analysis characteristic type of the problem that the input yaw response of the vehicle is too slow is a smooth characteristic;
when the vehicle has a roll working condition and the change value of the vehicle steering input speed is smaller than the preset speed change, the analysis characteristic type of the problem that the vehicle input yaw response is too slow is judged to be a smooth characteristic.
4. The vehicle steering input yaw response slowness problem optimization method according to claim 1, wherein the step of obtaining that the vehicle steering input yaw response slowness problem occurs at a specific position of the part according to the specific position of the vehicle body where the obtained vehicle yaw response slowness problem occurs and the type of the analytical characteristic of the obtained vehicle input yaw response slowness problem comprises the steps of:
when the analysis characteristic type of the problem that the input yaw response of the vehicle is too slow is a kinematics characteristic, acquiring hard point measurement data at a specific vehicle body position;
and acquiring the problem that the yaw response of the vehicle steering input is too slow at a specific position of a part according to the acquired hard point measurement data at the specific position of the vehicle body.
5. The vehicle steering input yaw response slowness problem optimization method according to claim 4, wherein the step of obtaining that the vehicle steering input yaw response slowness problem occurs at a specific position of the part according to the specific position of the vehicle body where the obtained vehicle yaw response slowness problem occurs and the type of the analytical characteristic of the obtained vehicle input yaw response slowness problem further comprises the steps of:
when the analysis characteristic type of the problem that the input yaw response of the vehicle is too slow is a smooth characteristic, acquiring aligning moment data and lateral force steering data of the vehicle;
comparing the acquired vehicle aligning torque data with the lateral force steering data and aligning torque data and lateral force steering data of a preset stored vehicle type to acquire a first comparison result;
according to the obtained first comparison result, obtaining a moment steering type of the problem that the yaw response of the vehicle steering input is too slow;
and acquiring the specific position of the part where the vehicle steering input yaw response is too slow according to the acquired torque steering type where the vehicle steering input yaw response is too slow.
6. The vehicle steering input yaw response slowness problem optimization method according to claim 5, wherein the step of obtaining that the vehicle steering input yaw response slowness problem occurs at a specific position of a part according to the type of torque steering where the obtained vehicle steering input yaw response slowness problem occurs comprises the steps of:
when the torque steering type generated by the problem that the yaw response is too slow when the vehicle steering input is a aligning torque, acquiring an influence factor of a component variable related to the aligning torque;
and acquiring the specific position of the part where the vehicle steering input yaw response is too slow according to the acquired influence factor of the aligning moment related part variable.
7. The vehicle steering input yaw response slowness problem optimization method according to claim 6, wherein the step of obtaining that the vehicle steering input yaw response slowness problem occurs at a specific position of a part according to the type of torque steering where the obtained vehicle steering input yaw response slowness problem occurs comprises the specific steps of:
when the moment steering type generated by the problem that the yaw response is too slow when the vehicle steering input is lateral force, acquiring an influence factor of a lateral force related part variable;
and acquiring the specific position of the part where the vehicle steering input yaw response is too slow according to the acquired influence factor of the lateral force related part variable.
8. The vehicle steering input yaw response slowness problem optimization method according to claim 1, wherein the step of obtaining that the vehicle steering input yaw response slowness problem occurs at a specific position of the part according to the obtained vehicle yaw response slowness problem occurring at a specific position of the vehicle body and the obtained type of the analytical characteristic of the vehicle steering input yaw response slowness problem further comprises the steps of:
and optimizing the structure of the part.
9. The method for optimizing a vehicle steering input yaw response slowness problem according to claim 8, wherein said step of "structurally optimizing the components" further comprises the steps of:
and verifying the optimization effect of the part with the optimized structure.
10. A system for solving the problem of too slow response of a vehicle steering input yaw based on K & C measurement and simulation means is characterized by comprising the following steps:
the vehicle reaction condition acquisition module is used for acquiring the vehicle reaction condition after steering input;
the vehicle body position analysis and acquisition module is in communication connection with the vehicle reaction condition acquisition module and is used for judging that the problem of too slow vehicle yaw response occurs at the specific position of the vehicle body according to the acquired vehicle reaction condition after steering input;
the vehicle roll working condition acquisition module is used for acquiring a vehicle roll working condition, a vehicle running speed and a vehicle steering input response speed change working condition;
the characteristic type acquisition module is in communication connection with the vehicle roll working condition acquisition module and is used for acquiring the analysis characteristic type of the problem that the vehicle input yaw response is too slow according to the vehicle roll working condition, the vehicle running speed and the vehicle steering input response speed change working condition;
and the part position acquisition module is in communication connection with the vehicle body position analysis acquisition module and the characteristic type acquisition module and is used for acquiring the specific position of the vehicle steering input yaw response over-slow problem according to the specific position of the vehicle body where the acquired vehicle yaw response over-slow problem occurs and the acquired analysis characteristic type of the vehicle input yaw response over-slow problem.
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