CN113029586B - Method and system for evaluating automobile starting and uniform speed driving dynamic property - Google Patents
Method and system for evaluating automobile starting and uniform speed driving dynamic property Download PDFInfo
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- CN113029586B CN113029586B CN202110191862.7A CN202110191862A CN113029586B CN 113029586 B CN113029586 B CN 113029586B CN 202110191862 A CN202110191862 A CN 202110191862A CN 113029586 B CN113029586 B CN 113029586B
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Abstract
The invention discloses a method and a system for evaluating the starting and uniform speed driving dynamic property of an automobile, wherein the method comprises the following steps: acquiring a starting accelerator pedal stroke to be tested and a target uniform speed; controlling a vehicle to be evaluated to run at a constant speed from a standstill to a certain speed according to the travel of a starting accelerator pedal under a starting gear, and collecting peak acceleration in the acceleration process; acquiring starting acceleration dynamic property according to the peak acceleration; controlling a vehicle to be evaluated to keep running at a target constant speed, and collecting the travel of a constant speed accelerator pedal in a constant speed running state; and acquiring the constant-speed driving dynamics according to the constant-speed accelerator pedal stroke. The method adopts three parameters of constant accelerator pedal travel, on-site starting peak acceleration and constant-speed running speed to quantitatively evaluate the partial load dynamic performance of the vehicle from two dimensions of starting acceleration and constant-speed running so as to objectively evaluate the dynamic performance of the vehicle.
Description
Technical Field
The invention relates to the field of automobile performance evaluation, in particular to a method and a system for evaluating the starting and constant-speed driving dynamics of an automobile.
Background
The automobile starting dynamic property and the constant-speed driving dynamic property are used as important parts of the dynamic property of the automobile and are important factors influencing the driving experience of customers. At the present stage, the urban road condition is relatively congested, and passengers feel the starting dynamic property and the uniform-speed driving dynamic property more deeply. Therefore, how to compare the starting dynamic performance and the constant-speed running dynamic performance of the same vehicle under different working conditions or different vehicles under the same working condition is an urgent problem to be solved.
Disclosure of Invention
The invention aims to overcome the defects of the background technology and provides a method and a system for evaluating the dynamic property of automobile starting and constant-speed running.
In a first aspect, a method for evaluating the starting and uniform speed driving dynamics of an automobile is provided, which comprises the following steps:
acquiring a starting accelerator pedal stroke to be tested and a target uniform speed;
controlling a vehicle to be evaluated to be accelerated to a certain vehicle speed for running at a constant speed from a standstill according to the travel of a starting accelerator pedal under a starting gear, and collecting the peak acceleration of the vehicle to be evaluated in the acceleration process;
acquiring starting acceleration dynamic performance of the vehicle to be evaluated based on the starting accelerator pedal travel according to the peak acceleration;
controlling the vehicle to be evaluated to keep running at the target constant speed, and collecting the travel of a constant speed accelerator pedal of the vehicle to be evaluated in the state of constant speed running at the target constant speed;
and acquiring the constant-speed running dynamic performance of the vehicle to be evaluated based on the target constant-speed according to the travel of the constant-speed accelerator pedal.
According to the first aspect, in a first possible implementation manner of the first aspect, the step of controlling the vehicle to be evaluated to start accelerating from a standstill to a certain vehicle speed for uniform running according to the starting accelerator pedal travel and collecting the peak acceleration of the vehicle to be evaluated in the accelerating process includes the following steps:
acquiring an accelerator pedal parameter of the vehicle to be evaluated, and acquiring a first accelerator pedal opening according to the starting accelerator pedal stroke and the accelerator pedal parameter;
controlling the vehicle to be evaluated to be in a starting gear and keeping an accelerator pedal at the first accelerator pedal opening degree, and accelerating the vehicle to be evaluated from a standstill until the vehicle to be evaluated reaches a certain vehicle speed to run at a constant speed;
and acquiring the peak acceleration of the vehicle to be evaluated in the acceleration process from the standstill to the certain speed.
According to the first aspect, in a second possible implementation manner of the first aspect, the step of "controlling the vehicle to be evaluated to keep running at the target constant speed and collecting a constant speed accelerator pedal stroke of the vehicle to be evaluated in a constant speed running state" includes the following steps:
if the vehicle to be evaluated is detected to be a manual gear vehicle, acquiring a test gear, controlling the vehicle to be evaluated to accelerate to the target constant speed to run at a constant speed under the test gear, and collecting the constant speed accelerator pedal stroke of the vehicle to be evaluated under the constant speed running state;
if the vehicle to be evaluated is detected to be an automatic transmission vehicle, controlling the vehicle to be evaluated to accelerate from a first preset vehicle speed to the target constant speed, and controlling the vehicle to be evaluated to keep the target constant speed to run at a constant speed, or; and controlling the vehicle to be evaluated to accelerate to a second preset vehicle speed, then decelerating to the target constant speed vehicle speed from the second preset vehicle speed, controlling the vehicle to be evaluated to keep the target constant speed vehicle speed to run at a constant speed, and collecting the travel of a constant speed accelerator pedal of the vehicle to be evaluated in a constant speed running state.
According to the first aspect, in a third possible implementation manner of the first aspect, the step of obtaining the starting acceleration dynamic performance of the vehicle to be evaluated based on the starting accelerator pedal travel according to the peak acceleration includes the following steps:
acquiring the peak acceleration corresponding to the starting accelerator pedal strokes respectively;
if the peak acceleration corresponding to a certain starting accelerator pedal stroke is larger than the peak acceleration corresponding to another starting accelerator pedal stroke, judging that the starting acceleration dynamic performance of the vehicle to be evaluated is stronger in the starting accelerator pedal stroke with the larger peak acceleration;
after the step of acquiring the starting acceleration dynamic property of the vehicle to be evaluated based on the starting accelerator pedal travel according to the peak acceleration, the method comprises the following steps:
acquiring target peak acceleration corresponding to different target starting accelerator pedal strokes of a plurality of vehicles to be evaluated respectively, and calculating acceleration gain according to the target starting accelerator pedal strokes and the corresponding target peak acceleration;
and if the acceleration gain corresponding to a certain vehicle to be evaluated is larger than the acceleration gain corresponding to another vehicle to be evaluated under the same target starting accelerator pedal stroke, judging that the starting acceleration dynamic property of the certain vehicle to be evaluated is stronger under the same target starting accelerator pedal stroke.
In a fourth possible implementation manner of the first aspect, after the step of obtaining the constant speed driving dynamics of the vehicle to be evaluated based on the target constant speed according to the constant speed accelerator pedal stroke, the method includes the following steps:
acquiring uniform speed accelerator pedal strokes corresponding to the target uniform speed respectively;
and if the fact that the travel of the constant speed accelerator pedal corresponding to a certain target constant speed is smaller than that of the constant speed accelerator pedal corresponding to another target constant speed is detected, judging that the constant speed running power of the vehicle to be evaluated is high under the target constant speed with the smaller travel of the constant speed accelerator pedal.
In a second aspect, a system for evaluating the starting and uniform speed driving dynamics of an automobile is provided, which comprises:
the test parameter acquisition module is used for acquiring the travel of a starting accelerator pedal to be tested and the target uniform speed;
the starting test module is in communication connection with the test parameter acquisition module and is used for controlling a vehicle to be evaluated to accelerate to a certain vehicle speed from a standstill according to the starting accelerator pedal travel under a starting gear and collecting peak acceleration of the vehicle to be evaluated in an acceleration process;
the starting dynamic property analysis module is in communication connection with the starting test module and is used for acquiring the starting acceleration dynamic property of the vehicle to be evaluated based on the starting accelerator pedal stroke according to the peak acceleration;
the constant speed test module is in communication connection with the test parameter acquisition module and is used for controlling the vehicle to be evaluated to keep running at the target constant speed and collecting the constant speed accelerator pedal stroke of the vehicle to be evaluated in the target constant speed running state;
and the constant-speed dynamic analysis module is in communication connection with the constant-speed test module and is used for acquiring the constant-speed driving dynamic of the vehicle to be evaluated based on the target constant-speed according to the travel of the constant-speed accelerator pedal.
According to a second aspect, in a first possible implementation manner of the second aspect, the launch test module includes:
the pedal opening obtaining unit is used for obtaining an accelerator pedal parameter of the vehicle to be evaluated and obtaining a first accelerator pedal opening according to the starting accelerator pedal stroke and the accelerator pedal parameter;
the starting test unit is in communication connection with the pedal opening obtaining unit and is used for controlling the vehicle to be evaluated to be in a starting gear, keeping an accelerator pedal at the first accelerator pedal opening, and accelerating the vehicle to be evaluated from a standstill until the vehicle to be evaluated reaches a certain vehicle speed to run at a constant speed;
and the acceleration acquisition unit is in communication connection with the starting test unit and is used for acquiring the peak acceleration of the vehicle to be evaluated in the acceleration process from the static state to the certain speed.
According to the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the constant speed testing module is configured to: if the vehicle to be evaluated is detected to be a manual gear vehicle, acquiring a test gear, controlling the vehicle to be evaluated to accelerate to the target constant speed and run at a constant speed under the test gear, and collecting the travel of a constant speed accelerator pedal of the vehicle to be evaluated in a constant speed running state; if the vehicle to be evaluated is detected to be an automatic transmission vehicle, controlling the vehicle to be evaluated to accelerate from a first preset vehicle speed to the target constant speed, and controlling the vehicle to be evaluated to keep the target constant speed to run at a constant speed, or; and controlling the vehicle to be evaluated to accelerate to a second preset vehicle speed, then decelerating to the target constant speed vehicle speed from the second preset vehicle speed, controlling the vehicle to be evaluated to keep the target constant speed vehicle speed to run at a constant speed, and collecting the travel of a constant speed accelerator pedal of the vehicle to be evaluated in a constant speed running state.
According to a second possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, the starting dynamics analysis module includes:
the acceleration acquisition unit is used for acquiring the peak acceleration corresponding to the strokes of the starting accelerator pedal;
the starting dynamic analysis unit is in communication connection with the acceleration acquisition unit and is used for judging that the starting acceleration dynamic of the vehicle to be evaluated is stronger in one starting accelerator pedal stroke with larger peak acceleration if the peak acceleration corresponding to one starting accelerator pedal stroke is larger than the peak acceleration corresponding to the other starting accelerator pedal stroke;
the starting dynamic analysis module is also used for acquiring target peak acceleration values respectively corresponding to the strokes of a plurality of vehicles to be evaluated at different target starting accelerator pedals, and calculating acceleration gain according to the strokes of the target starting accelerator pedals and the corresponding target peak acceleration values; and if the acceleration gain corresponding to a certain vehicle to be evaluated is larger than the acceleration gain corresponding to another vehicle to be evaluated under the same target starting accelerator pedal stroke, judging that the starting acceleration dynamic of the certain vehicle to be evaluated is stronger under the same target starting accelerator pedal stroke.
According to a third possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, the constant velocity dynamics analysis module includes:
the travel acquiring unit is used for acquiring uniform speed accelerator pedal travels corresponding to the target uniform speed respectively;
and the uniform speed dynamic analysis unit is in communication connection with the stroke acquisition unit and is used for judging that the uniform speed running dynamic of the vehicle to be evaluated is stronger under the target uniform speed with smaller uniform speed pedal stroke if detecting that the corresponding uniform speed accelerator pedal stroke under a certain target uniform speed is smaller than the corresponding uniform speed accelerator pedal stroke under another target uniform speed.
Compared with the prior art, the method adopts three parameters of constant accelerator pedal travel, on-site starting peak acceleration and constant-speed running speed to quantitatively evaluate the partial load dynamic performance of the vehicle from two dimensions of starting acceleration and constant-speed running so as to objectively evaluate the dynamic performance of the vehicle.
Drawings
Fig. 1 is a schematic flow chart of a method for evaluating the starting and uniform speed driving dynamics of an automobile according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a method for evaluating the starting and constant speed driving dynamics of an automobile according to another embodiment of the present invention;
FIG. 3 is a table relating starting accelerator pedal travel to peak acceleration provided in accordance with an embodiment of the present invention;
FIG. 4 is a table relating acceleration gain to starting accelerator pedal travel according to one embodiment of the present invention;
FIG. 5 is a table relating target uniform speed to uniform accelerator pedal travel provided by an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a system for evaluating vehicle starting and constant speed driving dynamics according to an embodiment of the present invention.
Reference numbers:
100. the system comprises an automobile starting and constant-speed running dynamic evaluation system; 110. a test parameter acquisition module; 120. a starting test module; 121. a pedal opening degree acquisition unit; 122. a starting test unit; 123. an acceleration acquisition unit; 130. a starting dynamic property analysis module; 131. an acceleration acquisition unit; 132. a starting dynamic property analysis unit; 140. a constant speed testing module; 150. a uniform dynamic analysis module; 151. a trip acquisition unit; 152. and a uniform dynamic property analysis unit.
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 invention, further details are provided below 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 evaluating vehicle starting and constant speed driving dynamics, including the following steps:
s100, acquiring a starting accelerator pedal stroke and a target constant speed of a vehicle to be evaluated;
s200, controlling a vehicle to be evaluated to be accelerated to a certain vehicle speed from a standstill under a starting gear according to the starting accelerator pedal stroke, and collecting peak acceleration of the vehicle to be evaluated in an acceleration process;
s300, acquiring starting acceleration dynamic performance of the vehicle to be evaluated based on the starting accelerator pedal stroke according to the peak acceleration;
s400, controlling the vehicle to be evaluated to keep running at the target constant speed, and collecting the constant speed accelerator pedal stroke of the vehicle to be evaluated in the constant speed running state of the target constant speed;
and S500, acquiring the constant-speed running dynamic performance of the vehicle to be evaluated based on the target constant-speed according to the travel of the constant-speed accelerator pedal.
Specifically, part load dynamic property: the power feeling of the driver who steps on any accelerator pedal stroke. In-situ starting dynamic property: and when the vehicle is static, the driver can feel the power of stepping on any accelerator pedal for a stroke.
In the embodiment, the starting accelerator pedal stroke to be tested and the target uniform speed are obtained. And (4) selecting any vehicle to be evaluated in the same evaluation and analysis mode of each vehicle. The starting dynamic property of the vehicle to be evaluated is evaluated by starting acceleration from stationary from in-situ parking. Therefore, the vehicle to be evaluated is controlled to start accelerating from a standstill to a certain speed and run at a constant speed according to the starting accelerator pedal stroke under the starting gear, namely the accelerator pedal stroke is kept constant under the starting accelerator pedal stroke until the vehicle to be evaluated runs at a constant speed. Due to the influence of different environments, even under the same starting accelerator pedal travel, the speed of the vehicle to be evaluated reaching the vehicle under different vehicle conditions may be the same or different.
And acquiring the peak acceleration of the vehicle to be evaluated in the acceleration process of starting from a standstill, wherein the peak acceleration is the maximum acceleration in all the accelerations acquired in the acceleration process. And acquiring the starting acceleration dynamic property of the vehicle to be evaluated based on the starting accelerator pedal stroke according to the peak acceleration.
And then evaluating the constant-speed running dynamic performance of the vehicle, controlling the vehicle to be evaluated to keep running at the target constant-speed at the constant speed based on the obtained target constant-speed, collecting the constant-speed accelerator pedal stroke of the vehicle to be evaluated in the constant-speed running state, namely the minimum accelerator pedal stroke of the vehicle to be evaluated in the constant-speed running state at the target constant-speed, and obtaining the constant-speed running dynamic performance of the vehicle to be evaluated based on the target constant-speed according to the constant-speed accelerator pedal stroke.
The method adopts three parameters of constant accelerator pedal travel, on-site starting peak acceleration and constant-speed running speed to quantitatively evaluate the partial load dynamic performance of the vehicle from two dimensions of starting acceleration and constant-speed running so as to objectively evaluate the dynamic performance of the vehicle. Meanwhile, the dynamic performance of the vehicle is evaluated based on partial load of the vehicle instead of the limit dynamic performance which can be achieved by the vehicle when the opening degree of an accelerator pedal is 100%, and the actual driving working condition of a driver can be better fitted, so that the daily actual driving feeling is well reflected.
Optionally, in another embodiment of the present invention, the step of controlling the vehicle to be evaluated to accelerate from a standstill to a certain vehicle speed for a uniform travel according to the starting accelerator pedal travel and collecting the peak acceleration during the acceleration of the vehicle to be evaluated at the starting gear in S200 includes the following steps:
s210, acquiring an accelerator pedal parameter of the vehicle to be evaluated, and obtaining a first accelerator pedal opening according to the starting accelerator pedal stroke and the accelerator pedal parameter;
s220, controlling the vehicle to be evaluated to be in a starting gear, keeping an accelerator pedal at the first accelerator pedal opening, and accelerating the vehicle to be evaluated from a static state until the vehicle to be evaluated reaches a certain vehicle speed to run at a constant speed;
s230, acquiring the peak acceleration of the vehicle to be evaluated in the acceleration process from the standstill to the certain vehicle speed.
Specifically, in this embodiment, the travel of the accelerator pedal CAN be obtained by converting an accelerator pedal opening signal that CAN be read by the vehicle CAN, and the actual pedal travel CAN be obtained by multiplying the pedal opening by the effective total travel and by adding the idle travel, or CAN be directly obtained by adding a displacement sensor. During testing, if an accelerator pedal position signal is obtained through vehicle CAN information, the selection of a typical working condition point is still measured by the opening degree of the accelerator pedal, and then the typical working condition point is converted into an accelerator pedal stroke which is more suitable to be used as a comparison reference.
Therefore, when the evaluation test is carried out, after the starting accelerator pedal stroke to be tested is obtained, the accelerator pedal parameter of the vehicle to be evaluated is obtained, the first accelerator pedal opening is obtained according to the starting accelerator pedal stroke and the accelerator pedal parameter, then the vehicle to be evaluated is controlled to be in the starting gear position, the accelerator pedal is kept in the first accelerator pedal opening, the vehicle to be evaluated is accelerated from a standstill until the vehicle to be evaluated reaches a certain vehicle speed to carry out uniform-speed running, and the peak acceleration of the vehicle to be evaluated in the acceleration process from the standstill to the certain vehicle speed is collected.
Optionally, as shown in fig. 2, in another embodiment of the present invention, the step of controlling the vehicle to be evaluated to keep running at the target constant speed at a constant speed and collecting a constant speed accelerator pedal stroke of the vehicle to be evaluated in a state of running at the target constant speed at the constant speed includes:
s410, if the vehicle to be evaluated is detected to be a manual gear vehicle, acquiring a test gear, controlling the vehicle to be evaluated to accelerate to the target vehicle speed, then reducing the vehicle speed to the target constant speed for running under the test gear, and collecting the constant speed accelerator pedal stroke of the vehicle to be evaluated under the constant speed running state;
s420, if the vehicle to be evaluated is detected to be an automatic transmission vehicle, controlling the vehicle to be evaluated to accelerate from a first preset vehicle speed to the target constant speed, and controlling the vehicle to be evaluated to keep the target constant speed to run at a constant speed, or; and controlling the vehicle to be evaluated to accelerate to a second preset vehicle speed, then decelerating to the target constant speed vehicle speed from the second preset vehicle speed, controlling the vehicle to be evaluated to keep the target constant speed vehicle speed to run at a constant speed, and collecting the travel of a constant speed accelerator pedal of the vehicle to be evaluated in a constant speed running state.
Specifically, in the embodiment, for the evaluation test of the uniform speed driving dynamic property, the gear switching modes of the manual transmission vehicle and the automatic transmission vehicle are different, and the acceleration modes corresponding to different gear selection of the manual transmission vehicle and the automatic transmission vehicle are different, so that the control modes of the manual transmission vehicle and the automatic transmission vehicle are different.
If the vehicle to be evaluated is detected to be a manual gear vehicle, a current test gear to be tested is obtained, the vehicle to be evaluated is controlled to accelerate to a target speed under the test gear, then the speed is reduced to a target constant speed for running, and the travel of a constant speed accelerator pedal of the vehicle to be evaluated under the constant speed running state is collected. In each gear, the acceleration mode of the manual gear vehicle is fixed, so that the uniform speed accelerator pedal stroke corresponds to the target uniform speed.
And if the vehicle to be evaluated is detected to be the automatic transmission vehicle, controlling the vehicle to be evaluated to keep running at the target constant speed. The vehicle to be evaluated may be a vehicle that is directly accelerated from a first preset vehicle speed to a target constant speed, where the first preset vehicle speed is a static or low vehicle speed (for example, the preset vehicle speed is reduced on the basis of the target constant speed), or the vehicle that is accelerated to a second preset vehicle speed and then decelerated to the target constant speed, where the second preset vehicle speed is a high vehicle speed (for example, the preset vehicle speed is increased on the basis of the target constant speed), and then the target constant speed is maintained to run at the constant speed.
For an automatic transmission vehicle, when the gear switching fluctuates, a plurality of uniform speed accelerator pedal strokes correspond to the same target uniform speed. For the same target constant speed, when the automatic transmission vehicle is in a high gear, the corresponding constant speed accelerator pedal stroke is smaller, and when the automatic transmission vehicle is in a low gear, the corresponding constant speed accelerator pedal stroke is larger, so that the target speed is reduced to the target constant speed by adopting a higher speed, so that the constant speed accelerator pedal stroke of the vehicle to be evaluated in the constant speed running state at the higher gear, namely the minimum constant speed accelerator pedal stroke corresponding to the target constant speed, is collected. The vehicle speed difference between the target vehicle speed and the target constant speed is not particularly limited.
According to the invention, the vehicle to be evaluated is accelerated to the target speed, and then the vehicle speed is reduced to the target constant speed for running, so that the collected constant speed accelerator pedal stroke corresponding to the target constant speed when the vehicle to be evaluated is in a high gear, namely the minimum constant speed accelerator pedal stroke, is ensured, and the constant speed running dynamic property of the vehicle to be evaluated can be more represented.
Optionally, in another embodiment of the present invention, the step of "S300 obtaining the starting acceleration dynamic property of the vehicle to be evaluated based on the starting accelerator pedal stroke according to the peak acceleration" includes the following steps:
s310, acquiring the peak acceleration corresponding to the starting accelerator pedal strokes respectively;
s320, if the peak acceleration corresponding to a certain starting accelerator pedal stroke is larger than the peak acceleration corresponding to another starting accelerator pedal stroke, judging that the starting acceleration dynamic of the vehicle to be evaluated is stronger in the starting accelerator pedal stroke with the larger peak acceleration;
after the step of acquiring the starting acceleration dynamic property of the vehicle to be evaluated based on the starting accelerator pedal stroke according to the peak acceleration, the method comprises the following steps:
s600, acquiring target peak acceleration values respectively corresponding to a plurality of vehicles to be evaluated in different target starting accelerator pedal strokes, and calculating acceleration gain according to the target starting accelerator pedal strokes and the corresponding target peak acceleration values;
s700, if the acceleration gain corresponding to a certain vehicle to be evaluated is larger than the acceleration gain corresponding to another vehicle to be evaluated under the same target starting accelerator pedal stroke, judging that the starting acceleration dynamic of the certain vehicle to be evaluated is stronger under the same target starting accelerator pedal stroke.
Specifically, in this embodiment, peak accelerations corresponding to a plurality of starting accelerator pedal strokes of the same vehicle to be evaluated are obtained, and the starting acceleration dynamics of the vehicle are evaluated according to the peak accelerations. As shown in fig. 3, a table is drawn by taking the starting accelerator pedal stroke as the horizontal axis and the peak acceleration as the vertical axis, so that the starting acceleration dynamics of the vehicle to be evaluated under different starting accelerator pedal strokes can be more intuitively understood. And if the peak acceleration corresponding to a certain starting accelerator pedal stroke is larger than the peak acceleration corresponding to another starting accelerator pedal stroke, judging that the starting acceleration dynamic property of the vehicle to be evaluated on one starting accelerator pedal stroke with larger peak acceleration is stronger. Further, peak accelerations corresponding to a plurality of starting accelerator pedal strokes of a plurality of different vehicles to be evaluated respectively may be plotted in the same table, such as vehicle type 1 and vehicle type 2 shown in fig. 3, so that starting acceleration dynamics of different vehicles to be evaluated under the same starting accelerator pedal stroke can be known more intuitively, and the acceleration dynamics of different vehicles to be evaluated need to be limited to the same starting accelerator pedal stroke.
In addition, target peak accelerations respectively corresponding to a plurality of vehicles to be evaluated in different target starting accelerator pedal strokes are obtained, acceleration gains are calculated according to the target starting accelerator pedal strokes and the corresponding target peak accelerations, and then starting acceleration dynamics of the vehicles are evaluated according to the acceleration gains. Wherein, the acceleration gain delta a of the unit starting accelerator pedal stroke is calculated according to the target starting accelerator pedal stroke s and the target peak acceleration a,
the target starting accelerator pedal stroke is taken as a horizontal axis, the acceleration gain is taken as a vertical axis to draw a table, and the acceleration gains corresponding to the starting accelerator pedal strokes of a plurality of different vehicles to be evaluated are respectively drawn in a unified table, such as a vehicle type 1 and a vehicle type 2 shown in fig. 4, so that the starting acceleration dynamic performance of the different vehicles to be evaluated under different starting accelerator pedal strokes can be more visually known. Under the same starting accelerator pedal stroke, if the acceleration gain corresponding to a certain vehicle to be evaluated is larger than the acceleration gain corresponding to another vehicle to be evaluated, the starting acceleration dynamic property of the vehicle to be evaluated with larger acceleration gain is judged to be stronger. And evaluating the acceleration dynamics of different vehicles to be evaluated, and limiting the acceleration dynamics to the same starting accelerator pedal stroke.
Optionally, in another embodiment of the present invention, after the step of "S500 obtaining the constant speed driving dynamics of the vehicle to be evaluated based on the target constant speed according to the constant speed accelerator pedal stroke", the method includes the following steps:
s510, acquiring uniform speed accelerator pedal strokes corresponding to the target uniform speed respectively;
s520, if it is detected that the travel of the constant speed accelerator pedal corresponding to a certain target constant speed is smaller than that of the constant speed accelerator pedal corresponding to another target constant speed, it is determined that the constant speed running power of the vehicle to be evaluated is stronger at the target constant speed with a smaller travel of the constant speed accelerator pedal.
Specifically, in this embodiment, uniform speed accelerator pedal strokes respectively corresponding to multiple target uniform speed speeds of the same vehicle to be evaluated are obtained, and as shown in fig. 5, a table is drawn by taking the target uniform speed as a horizontal axis and the uniform speed accelerator pedal stroke as a vertical axis, so that uniform speed driving dynamics of the vehicle to be evaluated at different target uniform speed speeds can be known more intuitively. And if the corresponding constant speed accelerator pedal stroke at a certain target constant speed is smaller than that at another target constant speed, judging that the constant speed driving power of the vehicle to be evaluated is stronger at the target constant speed with smaller constant speed accelerator pedal stroke.
Further, uniform speed accelerator pedal strokes corresponding to a plurality of target uniform speed speeds of a plurality of different vehicles to be evaluated respectively may be drawn in a unified table, such as vehicle type 1 and vehicle type 2 in fig. 5, so that uniform speed driving dynamics of different vehicles to be evaluated at the same target uniform speed can be known more intuitively, and the uniform speed driving dynamics of different vehicles to be evaluated need to be limited to the same target uniform speed. In addition, when the vehicle to be evaluated is a manual transmission vehicle, the same test gear is defined.
Referring to fig. 6, an embodiment of the present invention provides an evaluation system 100 for vehicle starting and uniform speed driving dynamics, including:
the test parameter acquisition module 110 is used for acquiring the starting accelerator pedal stroke to be tested and the target uniform speed;
the starting test module 120 is in communication connection with the test parameter acquisition module 110 and is used for controlling a vehicle to be evaluated to accelerate from a standstill to a certain vehicle speed and run at a uniform speed according to the starting accelerator pedal travel under a starting gear, and collecting peak acceleration of the vehicle to be evaluated in an acceleration process;
the starting dynamic property analysis module 130 is in communication connection with the starting test module 120 and is used for acquiring the starting acceleration dynamic property of the vehicle to be evaluated based on the starting accelerator pedal stroke according to the peak acceleration;
the constant speed test module 140 is in communication connection with the test parameter acquisition module 110, and is configured to control the vehicle to be evaluated to keep running at the target constant speed, and acquire a constant speed accelerator pedal stroke of the vehicle to be evaluated in a constant speed running state at the target constant speed;
and the constant speed dynamic property analysis module 150 is in communication connection with the constant speed test module 140 and is used for acquiring the constant speed driving dynamic property of the vehicle to be evaluated based on the target constant speed according to the travel of the constant speed accelerator pedal.
The launch test module 120 includes:
the pedal opening obtaining unit 121 is configured to obtain an accelerator pedal parameter of the vehicle to be evaluated, and obtain a first accelerator pedal opening according to the starting accelerator pedal stroke and the accelerator pedal parameter;
a starting test unit 122, communicatively connected to the pedal opening obtaining unit 121, configured to control the vehicle to be evaluated to be in a starting gear and an accelerator pedal to be kept at the first accelerator pedal opening, and start accelerating the vehicle to be evaluated from a standstill until the vehicle to be evaluated reaches the certain vehicle speed to perform uniform speed driving;
and the acceleration acquisition unit 123 is in communication connection with the starting test unit 122, and is used for acquiring a peak acceleration of the vehicle to be evaluated in an acceleration process from a standstill to the certain speed.
The constant speed testing module 140 is further configured to, if it is detected that the vehicle to be evaluated is a manual-gear vehicle, obtain a test gear, control the vehicle to be evaluated to accelerate to the target constant speed for constant speed running under the test gear, and collect a constant speed accelerator pedal stroke of the vehicle to be evaluated in a constant speed running state; if the vehicle to be evaluated is detected to be an automatic transmission vehicle, controlling the vehicle to be evaluated to accelerate from a first preset vehicle speed to the target constant speed, and controlling the vehicle to be evaluated to keep the target constant speed to run at a constant speed, or; and controlling the vehicle to be evaluated to accelerate to a second preset vehicle speed, then decelerating to the target constant speed vehicle speed from the second preset vehicle speed, controlling the vehicle to be evaluated to keep the target constant speed vehicle speed to run at a constant speed, and collecting the travel of a constant speed accelerator pedal of the vehicle to be evaluated in a constant speed running state.
The launch dynamics analysis module 130 includes:
an acceleration obtaining unit 131, configured to obtain the peak accelerations corresponding to the respective starting accelerator pedal strokes;
the starting dynamic analysis unit 132 is in communication connection with the acceleration acquisition unit 131, and is configured to determine that the starting acceleration dynamic of the vehicle to be evaluated is stronger in one starting accelerator pedal stroke where the peak acceleration is larger if the peak acceleration corresponding to one starting accelerator pedal stroke is larger than the peak acceleration corresponding to another starting accelerator pedal stroke;
the starting dynamic analysis module 130 is further configured to obtain target peak accelerations corresponding to different target starting accelerator pedal strokes of the vehicles to be evaluated respectively, and calculate an acceleration gain according to the target starting accelerator pedal strokes and the corresponding target peak accelerations; and if the acceleration gain corresponding to a certain vehicle to be evaluated is larger than the acceleration gain corresponding to another vehicle to be evaluated under the same target starting accelerator pedal stroke, judging that the starting acceleration dynamic of the certain vehicle to be evaluated is stronger under the same target starting accelerator pedal stroke.
The uniform dynamic analysis module 150 includes:
a stroke obtaining unit 151, configured to obtain uniform speed accelerator pedal strokes corresponding to the multiple target uniform speed speeds respectively;
and a uniform speed dynamic analysis unit 152, communicatively connected to the stroke obtaining unit 151, and configured to determine that the uniform speed driving dynamic of the vehicle to be evaluated is stronger at the target uniform speed with a smaller uniform speed pedal stroke if it is detected that the uniform speed accelerator pedal stroke corresponding to a certain target uniform speed is smaller than the uniform speed accelerator pedal stroke corresponding to another target uniform speed.
Specifically, the functions of each module in this embodiment have been described in detail in the corresponding method embodiment, and thus are not described in detail again.
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 suitable additions or subtractions depending on the requirements of legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer-readable media may not include electrical carrier signals or telecommunication signals in accordance with legislation and patent practice.
Based on the same inventive concept, embodiments of the present application further provide 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), an off-the-shelf Programmable Gate Array (fpga) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. 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 Memory 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. The method for evaluating the starting and uniform speed running dynamic performance of the automobile is characterized by comprising the following steps of:
acquiring a starting accelerator pedal stroke to be tested and a target constant speed;
controlling a vehicle to be evaluated to be accelerated to a certain vehicle speed for running at a constant speed from a standstill according to the travel of a starting accelerator pedal under a starting gear, and collecting the peak acceleration of the vehicle to be evaluated in the acceleration process;
acquiring starting acceleration dynamic performance of the vehicle to be evaluated based on the starting accelerator pedal stroke according to the peak acceleration;
controlling the vehicle to be evaluated to keep running at the target constant speed at a constant speed, and collecting the travel of a constant speed accelerator pedal of the vehicle to be evaluated in the state of running at the target constant speed at the constant speed;
and acquiring the constant-speed running dynamic performance of the vehicle to be evaluated based on the target constant-speed vehicle speed according to the travel of the constant-speed accelerator pedal.
2. The method for evaluating the vehicle starting and constant-speed running dynamic property of the claim 1, wherein the step of controlling the vehicle to be evaluated to start accelerating to a certain vehicle speed and run at a constant speed from a standstill according to the starting accelerator pedal travel under a starting gear and collecting the peak acceleration of the vehicle to be evaluated in the accelerating process comprises the following steps:
acquiring an accelerator pedal parameter of the vehicle to be evaluated, and acquiring a first accelerator pedal opening according to the starting accelerator pedal stroke and the accelerator pedal parameter;
controlling the vehicle to be evaluated to be in a starting gear and keeping an accelerator pedal at the first accelerator pedal opening degree, and accelerating the vehicle to be evaluated from a standstill until the vehicle to be evaluated reaches a certain vehicle speed to run at a constant speed;
and acquiring the peak acceleration of the vehicle to be evaluated in the acceleration process from the standstill to the certain speed.
3. The method for evaluating the dynamic property of starting and running at a constant speed of the automobile according to claim 1, wherein the step of controlling the vehicle to be evaluated to keep running at the target constant speed and collecting the travel of the constant speed accelerator pedal of the vehicle to be evaluated in the state of running at a constant speed comprises the following steps:
if the vehicle to be evaluated is detected to be a manual gear vehicle, acquiring a test gear, controlling the vehicle to be evaluated to accelerate to the target constant speed and run at a constant speed under the test gear, and collecting the travel of a constant speed accelerator pedal of the vehicle to be evaluated in a constant speed running state;
if the vehicle to be evaluated is detected to be an automatic transmission vehicle, controlling the vehicle to be evaluated to accelerate from a first preset vehicle speed to the target constant speed, and controlling the vehicle to be evaluated to keep the target constant speed to run at a constant speed, or; and controlling the vehicle to be evaluated to accelerate to a second preset vehicle speed, then decelerating to the target constant speed vehicle speed from the second preset vehicle speed, controlling the vehicle to be evaluated to keep the target constant speed vehicle speed to run at a constant speed, and collecting the travel of a constant speed accelerator pedal of the vehicle to be evaluated in a constant speed running state.
4. The method for evaluating the starting and uniform-speed running dynamics of the automobile according to claim 1, wherein the step of obtaining the starting acceleration dynamics of the vehicle to be evaluated based on the starting accelerator pedal travel according to the peak acceleration comprises the following steps of:
acquiring the peak acceleration corresponding to the starting accelerator pedal strokes respectively;
if the peak acceleration corresponding to a certain starting accelerator pedal stroke is larger than the peak acceleration corresponding to another starting accelerator pedal stroke, judging that the starting acceleration dynamic performance of the vehicle to be evaluated is stronger in the starting accelerator pedal stroke with the larger peak acceleration;
after the step of acquiring the starting acceleration dynamic property of the vehicle to be evaluated based on the starting accelerator pedal travel according to the peak acceleration, the method comprises the following steps:
acquiring target peak acceleration corresponding to different target starting accelerator pedal strokes of a plurality of vehicles to be evaluated respectively, and calculating acceleration gain according to the target starting accelerator pedal strokes and the corresponding target peak acceleration;
and if the acceleration gain corresponding to a certain vehicle to be evaluated is larger than the acceleration gain corresponding to another vehicle to be evaluated under the same target starting accelerator pedal stroke, judging that the starting acceleration dynamic property of the certain vehicle to be evaluated is stronger under the same target starting accelerator pedal stroke.
5. The method for evaluating the starting and constant speed running dynamics of the automobile according to claim 1, wherein after the step of obtaining the constant speed running dynamics of the vehicle to be evaluated based on the target constant speed according to the travel of the constant speed accelerator pedal, the method comprises the following steps of:
acquiring uniform speed accelerator pedal strokes corresponding to the target uniform speed respectively;
and if the fact that the travel of the constant-speed accelerator pedal corresponding to a certain target constant-speed vehicle is smaller than that of the constant-speed accelerator pedal corresponding to another target constant-speed vehicle is detected, judging that the constant-speed running power of the vehicle to be evaluated is higher under the target constant-speed vehicle with the smaller travel of the constant-speed accelerator pedal.
6. The utility model provides an automobile starting and at uniform velocity driving dynamics evaluation system which characterized in that includes:
the test parameter acquisition module is used for acquiring the travel of a starting accelerator pedal to be tested and the target uniform speed;
the starting test module is in communication connection with the test parameter acquisition module and is used for controlling a vehicle to be evaluated to start accelerating to a certain vehicle speed for uniform running from a standstill according to the starting accelerator pedal travel and collecting the peak acceleration of the vehicle to be evaluated in the accelerating process;
the starting dynamic property analysis module is in communication connection with the starting test module and is used for acquiring the starting acceleration dynamic property of the vehicle to be evaluated based on the starting accelerator pedal stroke according to the peak acceleration;
the constant speed test module is in communication connection with the test parameter acquisition module and is used for controlling the vehicle to be evaluated to keep running at the target constant speed and collecting the constant speed accelerator pedal stroke of the vehicle to be evaluated in the target constant speed running state;
and the constant speed dynamic property analysis module is in communication connection with the constant speed test module and is used for acquiring the constant speed running dynamic property of the vehicle to be evaluated based on the target constant speed according to the travel of the constant speed accelerator pedal.
7. The system for evaluating the vehicle starting and uniform speed running dynamic property of the claim 6, wherein the starting test module comprises:
the pedal opening obtaining unit is used for obtaining an accelerator pedal parameter of the vehicle to be evaluated and obtaining a first accelerator pedal opening according to the starting accelerator pedal stroke and the accelerator pedal parameter;
the starting test unit is in communication connection with the pedal opening obtaining unit and is used for controlling the vehicle to be evaluated to be in a starting gear, keeping an accelerator pedal at the first accelerator pedal opening, and accelerating the vehicle to be evaluated from a standstill until the vehicle to be evaluated reaches a certain vehicle speed to run at a constant speed;
and the acceleration acquisition unit is in communication connection with the starting test unit and is used for acquiring the peak acceleration of the vehicle to be evaluated in the acceleration process from the static state to the certain speed.
8. The system for evaluating the dynamic property of starting and running at a constant speed of an automobile according to claim 6, wherein the constant speed test module is further configured to obtain a test gear if it is detected that the vehicle to be evaluated is a manual transmission vehicle, control the vehicle to be evaluated to accelerate to the target constant speed for running at a constant speed under the test gear, and collect a constant speed accelerator pedal stroke of the vehicle to be evaluated in a constant speed running state; if the vehicle to be evaluated is detected to be an automatic transmission vehicle, controlling the vehicle to be evaluated to accelerate from a first preset vehicle speed to the target constant speed, and controlling the vehicle to be evaluated to keep the target constant speed to run at a constant speed, or; controlling the vehicle to be evaluated to accelerate to a second preset vehicle speed, then decelerating from the second preset vehicle speed to the target constant speed vehicle speed, controlling the vehicle to be evaluated to keep the target constant speed vehicle speed running at a constant speed, and collecting the travel of a constant speed accelerator pedal of the vehicle to be evaluated in a constant speed running state.
9. The system for evaluating the starting and uniform-speed running dynamics of the automobile according to claim 6, wherein the starting dynamics analysis module comprises:
the acceleration acquisition unit is used for acquiring the peak acceleration corresponding to the travel of the starting accelerator pedal;
the starting power analysis unit is in communication connection with the acceleration acquisition unit and is used for judging that the starting acceleration power of the vehicle to be evaluated is stronger in one starting accelerator pedal stroke with larger peak acceleration if the peak acceleration corresponding to one starting accelerator pedal stroke is larger than the peak acceleration corresponding to the other starting accelerator pedal stroke;
the starting dynamic analysis module is further used for acquiring target peak acceleration corresponding to the strokes of a plurality of vehicles to be evaluated on different target starting accelerator pedals, and calculating acceleration gain according to the strokes of the target starting accelerator pedals and the corresponding target peak acceleration; and if the acceleration gain corresponding to a certain vehicle to be evaluated is larger than the acceleration gain corresponding to another vehicle to be evaluated under the same target starting accelerator pedal stroke, judging that the starting acceleration dynamic property of the certain vehicle to be evaluated is stronger under the same target starting accelerator pedal stroke.
10. The system for evaluating the starting and driving dynamics of a vehicle according to claim 6, wherein the constant speed dynamics analysis module comprises:
the stroke obtaining unit is used for obtaining uniform speed accelerator pedal strokes corresponding to the target uniform speed respectively;
and the uniform speed dynamic analysis unit is in communication connection with the stroke acquisition unit and is used for judging that the uniform speed running dynamic of the vehicle to be evaluated is stronger under the target uniform speed with smaller uniform speed pedal stroke if detecting that the corresponding uniform speed accelerator pedal stroke under a certain target uniform speed is smaller than the corresponding uniform speed accelerator pedal stroke under another target uniform speed.
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| CN114323684B (en) * | 2021-12-16 | 2023-07-14 | 东风汽车集团股份有限公司 | Objective evaluation method and system for vehicle dynamic performance |
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