CN113686596A - Noise testing device, noise testing method and vehicle - Google Patents
Noise testing device, noise testing method and vehicle Download PDFInfo
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- CN113686596A CN113686596A CN202111162398.5A CN202111162398A CN113686596A CN 113686596 A CN113686596 A CN 113686596A CN 202111162398 A CN202111162398 A CN 202111162398A CN 113686596 A CN113686596 A CN 113686596A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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Abstract
The application provides a noise test device, noise test method and vehicle, noise test device includes: an accelerator pedal assembly, the accelerator pedal assembly comprising: the accelerator pedal is rotatably arranged on the vehicle floor, and the actuator is connected with the accelerator pedal and is suitable for driving the accelerator pedal to rotate according to a preset curve of the accelerator opening degree changing along with time; and the NVH collector is suitable for collecting vibration signals and noise signals of the whole vehicle in the rotating process of the accelerator pedal. Through setting up the actuator, the steerable accelerator pedal of actuator rotates according to predetermined throttle opening curve track that changes with time, and the output torque of motor all keeps unanimous in the steerable experiments many times, can obtain the same motor torque curve that changes with time to promote the accuracy of test result, promote the measuring accuracy, improve whole car development efficiency.
Description
Technical Field
The application relates to the technical field of new energy automobiles, in particular to a noise testing device, a noise testing method and a vehicle.
Background
At present, the new energy automobile industry is developing vigorously, and automobile enterprises and automobile consumers have higher and higher requirements on the performance of new energy automobiles. In the development process of electric vehicles, NVH (Noise, Vibration, Harshness Noise, Vibration and sound Vibration roughness) engineers need to perform a whole vehicle test, and collect, process and analyze Vibration signals and Noise signals of the whole vehicle through test equipment.
In many of these tests, the conclusion is drawn that: under the condition that the control strategy of the motor controller software is not changed, the vibration and noise of the motor assembly generally have a positive correlation trend with the torque. Based on the conclusion, in the development process of the electric automobile, in order to obtain multiple groups of effective test data which can be used for comparison, when an NVH engineer carries out road test of the whole automobile, the opening degree of an accelerator pedal can be controlled, the consistency of the output torque of a motor in the speed-up process of the automobile in the whole test process is ensured, and under the condition that the output torque of the motor is controlled all the time, a noise signal in the development and improvement process of the electric automobile is tested, so that the electric automobile is optimized. However, the opening of the accelerator pedal is affected by personal factors, the control is not accurate, the torque output by the motor is difficult to keep consistent in the process of controlling the accelerator pedal, and a consistent motor torque curve cannot be obtained, so that the test result is inaccurate, the test precision is not high, and the development process of the whole vehicle is delayed.
Content of application
The present application is directed to solving at least one of the problems in the prior art. Therefore, an object of this application is to provide a noise test device, this noise test device's test result changes just, and the measuring accuracy is high, can promote whole car development efficiency.
Another object of the present application is to propose a noise test method for a vehicle.
Another object of the present application is to propose a vehicle.
According to the noise testing arrangement for vehicle of this application embodiment, include: an accelerator pedal assembly, the accelerator pedal assembly comprising: the accelerator pedal is rotatably arranged on the vehicle floor, and the actuator is connected with the accelerator pedal and is suitable for driving the accelerator pedal to rotate according to a preset curve of the accelerator opening degree changing along with time; and the NVH collector is suitable for collecting vibration signals and noise signals of the whole vehicle in the rotating process of the accelerator pedal.
According to the noise testing device for the vehicle, through setting up the actuator, the steerable accelerator pedal of actuator rotates according to predetermined throttle opening curve track that changes with time, and the output torque of motor all keeps unanimous in steerable many experiments, can obtain the same motor torque curve that changes with time to promote the accuracy of test result, promote the measuring accuracy, improve whole car development efficiency.
Specifically, the actuator includes: a bracket disposed on the floor; the driving piece is fixed on the support, and the output end of the driving piece is connected with and drives the accelerator pedal to rotate.
Specifically, the driving member includes: a power source; an intermediate drive comprising: the transmission gear is connected with the power source, and one end of the transmission rack is connected with the accelerator pedal.
Optionally, a guide structure is further disposed between the bracket and the transmission rack, and the guide structure is adapted to move the transmission rack in a direction approaching or departing from the accelerator pedal.
Specifically, the guide structure includes: a guide rail and a guide groove cooperating with each other, one of the guide rail and the guide groove being provided on the bracket, the other of the guide rail and the guide groove being provided on the transmission rack.
In some embodiments, the stent comprises: the accelerator pedal comprises a vertical plate and an inclined plate, wherein the lower end of the vertical plate and the lower end of the inclined plate are fixedly connected with the floor of a vehicle, the upper end of the vertical plate is connected with the upper end of the inclined plate, and when the accelerator pedal is located at an initial position, the inclined plate is orthogonal to the accelerator pedal.
Optionally, an avoiding hole for avoiding the accelerator pedal is further formed in the inclined plate.
In some embodiments, a reset member is further disposed between the accelerator pedal and the bracket or the floor, and the reset member is adapted to reset the accelerator pedal when the actuator stops supplying power to the accelerator pedal.
According to the noise testing method for the vehicle provided by the embodiment of the application, the noise testing method is completed by adopting any one of the noise testing devices, and the noise testing method at least comprises the following steps: acquiring an accelerator opening curve from actual data or editing the accelerator opening curve according to actual conditions; the actuator drives the accelerator pedal to rotate according to the accelerator opening curve; the NVH collector collects vibration signals and noise signals of the whole vehicle in the rotation process of the accelerator pedal; after the actuator drives the accelerator pedal to a preset opening degree, the actuator stops providing power for the accelerator pedal, and the accelerator pedal resets.
According to the noise testing method for the vehicle, by arranging the noise testing device, the opening degree of the throttle valve in multiple experiments is enabled to rotate according to the preset condition, the testing result can be improved, the precision of experimental data is improved, the noise testing device can be stopped at any time in the experiment process by arranging the brake pedal, the noise testing process is stopped, and the safety of the noise testing process is improved.
According to the embodiment of the application, the vehicle comprises the noise testing device and the noise testing method.
According to the vehicle of the embodiment of the application, by the arrangement of the noise testing device and the noise testing method, the vibration signal and the noise signal of the vehicle can be accurately tested, the vehicle is convenient to design and improve, the performance of the vehicle is optimized, and the development efficiency is improved.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural diagram of an accelerator pedal assembly according to an embodiment of the present application;
FIG. 2 is a simplified mathematical modeling diagram of an accelerator pedal assembly according to an embodiment of the present application;
FIG. 3 is a flow chart of a noise testing method according to an embodiment of the present application.
Reference numerals:
an accelerator pedal assembly 100,
An accelerator pedal 1,
An actuator 2,
A bracket 3, a vertical plate 31, an inclined plate 32,
A driving member 4,
A transmission gear 5,
A transmission rack 6,
A slide block 7,
A floor 200,
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application. In the description of the present application, "a plurality" means two or more.
A noise test apparatus according to an embodiment of the present application is described below with reference to fig. 1 to 3.
According to the noise testing arrangement for vehicle of this application embodiment, include: accelerator pedal assembly 100 and NVH gathers the outfit, and accelerator pedal assembly 100 includes: the accelerator pedal 1 is rotatably arranged on a vehicle floor 200, the actuator 2 is connected with the accelerator pedal 1 and is suitable for driving the accelerator pedal 1 to rotate according to a preset curve of accelerator opening degree changing along with time, and the NVH (Noise, Vibration, Harshness Noise, Vibration and sound Vibration roughness) collector is suitable for collecting Vibration signals and Noise signals of the whole vehicle in the rotating process of the accelerator pedal 1.
The noise testing device of the embodiment of the application is suitable for testing the whole vehicle vibration signal and the noise signal of the vehicle, preferably, the noise testing device of the application is applied to the electric vehicle, and the structure and the working process of the application are described below by taking the noise testing device for the electric vehicle as an example.
The whole vehicle vibration signal and the noise signal of the electric vehicle are related to the output torque of the motor, in the development process of the electric vehicle, in order to obtain a plurality of groups of effective test data which can be used for comparison, when a NVH engineer carries out the road test of the whole vehicle, the consistency of the output torque of the motor in the speed-up process of the vehicle in the whole test process is ensured, and under the condition of controlling the output torque of the motor to be consistent, the noise signal in the development and improvement process of the electric vehicle is tested, so that the electric vehicle is optimized. The accelerator opening of the accelerator pedal 1 can control the output torque of the motor, so that the output torque of the motor can be controlled to be consistent by controlling the accelerator opening of the accelerator pedal 1 to change along a determined change track. The actuator 2 of the embodiment of the application can drive the accelerator pedal 1 to rotate according to a curve of the preset accelerator opening degree changing along with time, the accelerator opening degree changes along a curve track of the accelerator opening degree changing along with time, namely the output torque of the motor can be controlled to change according to the curve track of the torque changing along with time, and the output torque of the motor for controlling multiple experiments is kept consistent.
The NVH acquisition device can collect vibration signals and noise signals of the whole vehicle in the rotating process of the accelerator pedal 1, provides test analysis data, and is convenient for optimizing the performance of the whole vehicle.
According to the noise testing device for the vehicle of the embodiment of the application, through setting up the actuator 2, the controllable accelerator pedal 1 of actuator 2 rotates according to the curve track of the scheduled accelerator opening along with the time variation, the output torque of the motor keeps consistent in the controllable multiple experiments, the same motor torque along with the time variation curve can be obtained, thereby the accuracy of the test result is promoted, the testing precision is promoted, and the development efficiency of the whole vehicle is improved.
Specifically, as shown in fig. 1, the actuator 2 includes: support 3 and driving piece 4, support 3 sets up on floor 200, and driving piece 4 is fixed on support 3, and the output of driving piece 4 links to each other with accelerator pedal 1 and drives accelerator pedal 1 and rotate. The output end of the driving piece 4 outputs power to drive the accelerator pedal 1 to rotate according to a preset curve that the accelerator opening degree changes along with time.
Specifically, the driver 4 includes: power supply and intermediate transfer spare, intermediate transfer spare includes: the transmission gear 5 and the transmission rack 6 meshed with the transmission gear 5, the transmission gear 5 is connected with a power source, and one end of the transmission rack 6 is connected with the accelerator pedal 1.
The power source produces drive power, and the power transmission of power source output is transmitted to accelerator pedal 1 to middle driving medium connection power source and accelerator pedal 1, drives accelerator pedal 1 and rotates.
Specifically, the power supply is the motor, and intermediate drive spare includes: the output shaft of the motor is connected with the transmission gear 5, the transmission gear 5 is meshed with the transmission rack 6, and one end of the transmission rack 6 is connected with the accelerator pedal 1. When the motor is started, the motor drives the transmission gear 5 to rotate, the power source and the transmission gear 5 are both fixed on the support 3, the meshing action of the transmission gear 5 drives the transmission rack 6 to move, and the movement of the transmission rack 6 drives the accelerator pedal 1 to rotate.
Further, a reset member is provided between the accelerator pedal 1 and the bracket 3 or the floor 200, and the reset member is adapted to reset the accelerator pedal 1 when the actuator 2 stops supplying power to the accelerator pedal 1.
It can be understood that the people not only can drive accelerator pedal 1 and rotate when normally driving, still can loosen accelerator pedal 1 and make accelerator pedal 1 resume normal position and slow down, set up the piece that resets and accord with normal driving custom, promote this application noise testing arrangement's experimental range, promote the experiment accuracy.
Reset through setting up not only can restore the normal position with accelerator pedal 1 when the experiment finishes, conveniently resume experimental apparatus, be convenient for experiment once more, still can make accelerator pedal 1 reverse want to rotate, rotate according to the curve of predetermined throttle aperture change with time, accord with people's normal driving custom, promote the accuracy of experiment.
And through setting up the direction of rotation and the slew velocity of motor, can drive driving rack 6 and remove to different directions with different speed, can drive accelerator pedal 1 and rotate according to the curve that the preset throttle opening degree changes with time.
In some embodiments, the accelerator pedal 1 is controlled as follows: when an experiment is started, the accelerator pedal 1 is located at an initial position, the transmission rack 6 is connected with the accelerator pedal 1, the power source is started, the motor rotates forwards, the motor drives the transmission gear 5 to rotate anticlockwise, the transmission gear 5 drives the transmission rack 6 to move towards the accelerator pedal 1, the transmission rack 6 drives the accelerator pedal 1 to rotate, the accelerator pedal 1 rotates according to a curve of the preset accelerator opening along with time change, when the curve of the preset accelerator opening along with time change is positive growth speed and is larger, the motor rotation speed is increased, the transmission rack 6 is driven to accelerate and drive the accelerator pedal 1 to rotate, when the curve of the preset accelerator opening along with time change is positive growth speed and is smaller, the motor rotation speed is reduced, the transmission rack 6 is driven to slowly drive the accelerator pedal 1 to rotate, when the curve of the preset accelerator opening along with time change is negative growth, the motor rotates reversely, the motor drives the transmission gear 5 to rotate clockwise, the transmission gear 5 drives the transmission rack 6 to move towards the direction far away from the accelerator pedal 1, the accelerator pedal 1 rotates reversely under the action of the reset piece, the motor drives the rack to return to the initial position after the experiment is finished, and the accelerator pedal 1 also returns to the initial position under the action of the reset piece to prepare for the next experiment.
Optionally, a guiding structure is further arranged between the bracket 3 and the transmission rack 6, and the guiding structure is suitable for enabling the transmission rack 6 to move in a direction close to or far away from the accelerator pedal 1. Through setting up guide structure and leading to transmission rack 6, can promote the stability in transmission rack 6's motion route to can be spacing to transmission rack 6, avoid transmission rack 6 to receive partial effort and deviate from support 3, promote this application noise testing arrangement's job stabilization nature.
Specifically, the guide structure includes: a guide rail and a guide groove cooperating with each other, one of the guide rail and the guide groove being provided on the carrier 3 and the other of the guide rail and the guide groove being provided on the transmission rack 6. The above-described guide rail and channel configurations are for illustrative purposes, but it will be apparent to those of ordinary skill in the art after reading the following disclosure that the application of the present disclosure to other guide configurations is within the scope of the present disclosure.
In some embodiments of the present application, a guide rail is provided on the transmission rack 6, a guide groove is provided on the bracket 3, and the transmission rack 6 and the bracket 3 are mutually matched and arranged through the guide rail and the guide groove, so that the working stability of the transmission rack 6 can be improved.
In other embodiments of the present application, a guide groove is provided on the transmission rack 6, a guide rail is provided on the bracket 3, and the transmission rack 6 and the bracket 3 are mutually matched and arranged through the guide groove and the guide rail, so that the working stability of the transmission rack 6 can be improved.
In some embodiments, the actuator 2 further comprises a slider 7, the slider 7 is disposed between the end of the transmission rack 6 and the accelerator pedal 1, the transmission rack 6 drives the slider 7 to move, the slider 7 transmits the driving force to the accelerator pedal 1, and the effect of driving the accelerator pedal 1 can be improved by adjusting the structure of the slider 7, for example, the cross-sectional area of the slider 7 from the contact end with the transmission rack 6 to the contact end with the accelerator pedal 1 is gradually increased.
In some embodiments, the support 3 comprises: the accelerator pedal comprises a vertical plate 31 and an inclined plate 32, wherein the lower end of the vertical plate 31 and the lower end of the inclined plate 32 are fixedly connected with the floor 200 of the vehicle, the upper end of the vertical plate 31 is connected with the upper end of the inclined plate 32, and the inclined plate 32 is orthogonal to the accelerator pedal 1 when the accelerator pedal 1 is in an initial position.
The lower ends of the vertical plate 31 and the inclined plate 32 of the bracket 3 are disposed on the floor 200 and are fixedly connected to the floor 200, that is, the lower ends of the vertical plate 31 and the inclined plate 32 are located on the same horizontal plane as the fixed end of the accelerator pedal 1. The upper end of vertical board 31 and the upper end of hang plate 32 link to each other, and vertical board 31, hang plate 32 and floor 200 constitute a right angled triangle jointly with the linkage segment of hang plate 32, vertical board 31, and right angled triangle's shape is comparatively firm, can promote support 3's arrangement stability. And the angle that sets up the inclined plate is perpendicular when being in the initial position with accelerator pedal 1, that is to say accelerator pedal 1 is located the initial position, the driving rack 6 of intermediate drive spare is so at 1 mutually perpendicular with accelerator pedal, like this accelerator pedal 1 when starting to rotate from the initial position, the force perpendicular to accelerator pedal 1 of intermediate drive spare to accelerator pedal 1 application of force, the intermediate drive spare is perpendicular to accelerator pedal 1's start-up power direction, drive power does not disperse to tangential direction, accelerator pedal 1's rotation start-up power is sufficient, the experiment of being convenient for. In addition, the arrangement mode is convenient for mathematical modeling and writing of control programs.
Optionally, an avoidance hole for avoiding the accelerator pedal 1 is further provided on the inclined plate 32.
The inclined plate 32 is arranged to intersect with the accelerator pedal 1, and the design mode can make the contact surface between the actuator 2 on the inclined plate 32 and the accelerator pedal 1 larger, and promote the driving force of the actuator 2 to the accelerator pedal 1. And the inclined plate is provided with an avoiding hole for avoiding the accelerator pedal 1, so that the rotation action of the moving pedal can be avoided, the movement interference is avoided, and the working stability of the accelerator pedal 1 is improved.
According to the noise testing method for the vehicle provided by the embodiment of the application, the noise testing method is completed by adopting any one of the noise testing devices, and the noise testing method at least comprises the following steps: acquiring an accelerator opening curve from actual data or editing the accelerator opening curve according to actual conditions; the actuator 2 drives the accelerator pedal 1 to rotate according to the accelerator opening curve; the NVH collector collects vibration signals and noise signals of the whole vehicle in the rotation process of the accelerator pedal 1; after the actuator 2 drives the accelerator pedal 1 to a preset opening degree, the actuator 2 stops supplying power to the accelerator pedal 1, and the accelerator pedal 1 is reset.
The noise test method of the embodiment of the present application is briefly described below with reference to fig. 3.
When the noise testing method is started, a preset accelerator opening time-varying curve is obtained, and the accelerator opening time-varying curve can be obtained from actual data or edited according to actual conditions, namely, the accelerator opening time-varying curve can be obtained by testing actual data obtained in one actual driving, or can be edited from results obtained in multiple experiments, and can be selected according to actual requirements in the actual experiment process.
The fitting process of the curve of the accelerator opening degree along with the time change is as follows:
the time-domain signal of the accelerator pedal opening can be regarded as a function of the accelerator opening along with time, the function is set as f (t), Excel can be derived from curve data, so that a function f (t) is obtained, and a function value f (ti) at t0, t1, t2, and tn exists in an interval [ a, b ] (i is 0,1,2.
Make it satisfy the interpolation condition
In consideration of the difficulty of programming, the patent performs numerical calculation by using Lagrange interpolation polynomial, which is expressed as:
wherein the content of the first and second substances,
thereby obtaining an accelerator opening curve
(in units of "%"), the angle α of the initial position of the accelerator pedal is known, so the accelerator opening angle δ is obtained:
subsequently, the accelerator opening curve is edited into a script file or software is imported into a control module of the noise testing device, specifically, mathematical modeling is performed on the noise testing device, as shown in fig. 2, and the process of editing the accelerator opening curve into the script file is described in detail below.
As shown in fig. 2, modeling the accelerator pedal assembly 100, for the accelerator pedal 1, the angle α between the initial position and the floor 200 is known, point O is the fixed point of the accelerator pedal 1 and the floor 200, point ob is the vertical plate 31, point nb is the inclined plate 32, point oc is the accelerator pedal 1, the length of the accelerator pedal 1 is L, when the accelerator pedal 1 is at the initial position, the inclined plate 32 is orthogonal to the accelerator pedal 1, the intersection point of the actuator 2 and the accelerator pedal 1 at the initial position is m, the included angle between the inclined plate 32 and the floor 200 is beta, and satisfies that beta is pi/2-alpha, point a is the contact point of the end part of the transmission rack 6 and the accelerator pedal 1 when the actuator 2 works, point n is the contact point of the accelerator pedal 1 when the accelerator opening is 100%, that is, when the accelerator opening is 100%, the movable end of the accelerator pedal 1 and the fixed end of the inclined plate 32 are positioned to overlap each other.
When the actuator 2 works and the accelerator pedal 1 rotates, the point a moves from m to n along mn, the moving speed of the point a is set as v (t), and the accelerator opening angle is represented by delta.
ma is:
then
|om|＝|on|cosα＝Lcosα
The throttle opening angle δ is expressed as:
therefore, the moving speed v (t) of the point a is:
the angular velocity of the accelerator pedal is:
modeling of the accelerator pedal assembly 100 is completed, and then a force analysis is performed on the accelerator pedal assembly 100, which may be listed as a mechanical equation,
wherein f (t) is force input of the rack to the accelerator pedal, M is system mass, k is rigidity of the accelerator pedal spring, x is rack displacement, and other structural factors are ignored, and the rack displacement x is considered to be effective displacement of the accelerator pedal spring.
Namely, it is
Let the reference circle radius (or pitch circle radius) of the actuator 2 be r, and the power source output torque curve be tq (t), then:
wherein
From the above mathematical modeling it can be deduced that:
where ^ v dt may also be deduced from the above mathematical modeling:
∫v dt＝Lcosαsinδ(t)
the relation curve of the power source output torque of the actuator 2 and the opening degree of the accelerator pedal 1 can be obtained through the formula, the actuator 2 is arranged to output the torque according to a preset mode, and the accelerator pedal 1 can be driven to rotate according to the preset change curve of the opening degree of the accelerator along with time.
Specifically, an opening angle delta (t) of an accelerator pedal and output torque Tq (t) of the small motor are calculated, and a Tq (t) curve and discrete points of current are imported into a small motor software control program.
Then, the noise test device, into which the script file or software edited according to the accelerator opening curve has been introduced by the control module, is fixed on the floor 200 of the test vehicle according to the above requirements.
The noise testing device is operated in a test mode, whether the noise testing device fails or not is verified, when the noise testing device fails, a tester stops the noise testing device in a braking mode, specifically, the priority of a brake pedal is higher than that of an accelerator pedal 1, namely, the accelerator pedal 1 fails when the brake pedal works, and the tester stops the noise testing device in a mode that the tester drives the brake pedal to enable the accelerator pedal 1 to fail.
And (3) the noise testing device is tested to run, and when the noise testing device does not break down, the NVH acquisition device or other testing equipment (HEAD or LMS) is started to record the experimental data.
Subsequently, the actuator 2 of the noise test device is activated.
A driving piece 4 of the noise testing device works, and a transmission rack 6 drives the accelerator pedal 1 to change according to a script file input into the control module.
In the experimental process, the accelerator pedal 1 can be disabled by driving the brake pedal at any time, so that the noise testing device is stopped, and the noise testing process is stopped.
The noise testing device normally operates without controlling the brake pedal.
The noise testing device normally operates, and the transmission rack 6 drives the accelerator pedal 1 to finish work according to the change of the preset accelerator opening degree along with time.
When the work of the accelerator pedal 1 is finished, the actuator 2 stops working or moves reversely, and the reset piece drives the accelerator pedal 1 to return to the initial position.
The tester drives the brake pedal to enable the accelerator pedal 1 to fail, and the test is completed.
According to the noise testing method for the vehicle, by arranging the noise testing device, the opening degree of the throttle valve in multiple experiments is enabled to rotate according to the preset condition, the testing result can be improved, the precision of experimental data is improved, the noise testing device can be stopped at any time in the experiment process by arranging the brake pedal, the noise testing process is stopped, and the safety of the noise testing process is improved.
According to the embodiment of the application, the vehicle comprises the noise testing device and the noise testing method.
According to the vehicle of the embodiment of the application, by the arrangement of the noise testing device and the noise testing method, the vibration signal and the noise signal of the vehicle can be accurately tested, the vehicle is convenient to design and improve, the performance of the vehicle is optimized, and the development efficiency is improved.
In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A noise testing device for a vehicle, comprising:
an accelerator pedal assembly, the accelerator pedal assembly comprising: the accelerator pedal is rotatably arranged on the vehicle floor, and the actuator is connected with the accelerator pedal and is suitable for driving the accelerator pedal to rotate according to a preset curve of the accelerator opening degree changing along with time;
and the NVH collector is suitable for collecting vibration signals and noise signals of the whole vehicle in the rotating process of the accelerator pedal.
2. The noise-testing device for a vehicle according to claim 1, wherein the actuator includes:
a bracket disposed on the floor;
the driving piece is fixed on the support, and the output end of the driving piece is connected with and drives the accelerator pedal to rotate.
3. The noise testing device for a vehicle according to claim 2, wherein the driving member includes:
a power source;
an intermediate drive comprising: the transmission gear is connected with the power source, and one end of the transmission rack is connected with the accelerator pedal.
4. The noise testing device for a vehicle of claim 3, wherein a guide structure is further disposed between the bracket and the transmission rack, the guide structure being adapted to move the transmission rack in a direction toward or away from the accelerator pedal.
5. The noise testing device for a vehicle according to claim 4, wherein the guide structure comprises: a guide rail and a guide groove cooperating with each other, one of the guide rail and the guide groove being provided on the bracket, the other of the guide rail and the guide groove being provided on the transmission rack.
6. The noise testing device for a vehicle according to claim 2, wherein the bracket includes: the accelerator pedal comprises a vertical plate and an inclined plate, wherein the lower end of the vertical plate and the lower end of the inclined plate are fixedly connected with the floor of a vehicle, the upper end of the vertical plate is connected with the upper end of the inclined plate, and when the accelerator pedal is located at an initial position, the inclined plate is orthogonal to the accelerator pedal.
7. The noise testing device for the vehicle according to claim 6, wherein an avoiding hole for avoiding the accelerator pedal is further formed in the inclined plate.
8. The noise testing device for a vehicle according to claim 1, wherein a reset member is further provided between the accelerator pedal and the bracket or the floor, the reset member being adapted to reset the accelerator pedal when the actuator stops supplying power to the accelerator pedal.
9. A noise testing method for a vehicle, characterized in that the noise testing method is performed using the noise testing apparatus of any one of claims 1 to 8, the noise testing method comprising at least the steps of:
acquiring an accelerator opening curve from actual data or editing the accelerator opening curve according to actual conditions;
the actuator drives the accelerator pedal to rotate according to the accelerator opening curve;
the NVH collector collects vibration signals and noise signals of the whole vehicle in the rotation process of the accelerator pedal;
after the actuator drives the accelerator pedal to a preset opening degree, the actuator stops providing power for the accelerator pedal, and the accelerator pedal resets.
10. A vehicle comprising the noise testing apparatus of any one of claims 1 to 8 or the noise testing method of claim 9.
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| CN114427978A (en) * | 2022-01-20 | 2022-05-03 | 上汽通用五菱汽车股份有限公司 | Limiting method and system for opening degree of accelerator pedal |
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| CN104596776A (en) * | 2014-12-19 | 2015-05-06 | 安徽江淮汽车股份有限公司 | Car gentle acceleration control device |
| CN106568603A (en) * | 2016-11-10 | 2017-04-19 | 江苏三能动力总成有限公司 | Device for controlling vehicle slow acceleration and method for controlling vehicle slow acceleration |
| CN109030029A (en) * | 2018-08-09 | 2018-12-18 | 合肥工业大学 | Pass through the controller for automobile throttle pedal and method of noise testing for vehicle |
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2021
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| CN104596776A (en) * | 2014-12-19 | 2015-05-06 | 安徽江淮汽车股份有限公司 | Car gentle acceleration control device |
| CN106568603A (en) * | 2016-11-10 | 2017-04-19 | 江苏三能动力总成有限公司 | Device for controlling vehicle slow acceleration and method for controlling vehicle slow acceleration |
| CN109030029A (en) * | 2018-08-09 | 2018-12-18 | 合肥工业大学 | Pass through the controller for automobile throttle pedal and method of noise testing for vehicle |
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| CN114427978A (en) * | 2022-01-20 | 2022-05-03 | 上汽通用五菱汽车股份有限公司 | Limiting method and system for opening degree of accelerator pedal |
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