CN112131655A - Brake pedal feel performance determination method and device and computer readable storage medium - Google Patents
Brake pedal feel performance determination method and device and computer readable storage medium Download PDFInfo
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Abstract
The embodiment of the specification discloses a brake pedal feel performance determining method, a brake pedal feel performance determining device and a computer readable storage medium, wherein the method comprises the following steps: acquiring a target signal detected by a brake pedal of a target vehicle in a process of being stepped down and a deceleration signal of the target vehicle, wherein the target signal is a signal for representing the inductive property of the brake pedal; determining a target fitting curve of the inductive performance of the brake pedal according to the target signal and the deceleration signal; and dividing the target fitting curve into N stages, and determining the brake pedal feel performance corresponding to each stage according to a preset reference curve. According to the scheme, the brake pedal feel performance can be automatically analyzed according to the relation between the target fitting curve and the preset reference curve, the automation of brake pedal feel performance analysis is realized, and the analysis efficiency is improved.
Description
Technical Field
The embodiment of the specification relates to the technical field of automobiles, in particular to a brake pedal feel performance determining method and device and a computer readable storage medium.
Background
In the vehicle model development process, the brake pedal sensitivity performance of each type of vehicle during braking is tested, and the brake pedal sensitivity performance generally refers to the relationship between the brake pedal feedback force, the brake pedal displacement and the generated vehicle deceleration. According to the development of the vehicle type, the change curves of the variables are required to be within a specified range so as to avoid the negative feedback of a client on the vehicle, such as the problems of labor for treading and stopping the vehicle when the vehicle is braked.
Among the prior art, when analysis brake pedal feel performance, through the data of brake pedal when gathering test vehicle braking, draw curve and analytic data through the manual work, because the data quantity who gathers is huge, carry out data processing through the manual work and can appear handling loaded down with trivial details, accuracy and the not high problem of efficiency.
Disclosure of Invention
The embodiment of the specification provides a brake pedal feel performance determining method, a brake pedal feel performance determining device and a computer readable storage medium.
In a first aspect, an embodiment of the present specification provides a brake pedal sensitivity determination method, including:
acquiring a target signal detected by a brake pedal of a target vehicle in a process of being stepped down and a deceleration signal of the target vehicle, wherein the target signal is a signal for representing the inductive property of the brake pedal;
determining a target fitting curve of the inductive performance of the brake pedal according to the target signal and the deceleration signal;
and dividing the target fitting curve into N stages, and determining the brake pedal feel performance corresponding to each stage according to a preset reference curve, wherein N is a positive integer.
Optionally, the target signal comprises one or more of the following signals: a pedal feedback force signal of the brake pedal, a displacement signal of the brake pedal, and a master cylinder oil pressure signal of the target vehicle.
Optionally, after the obtaining of the target signal detected by the brake pedal of the target vehicle during being depressed and the deceleration signal of the target vehicle, the method further comprises:
removing the noise signal of the target signal to obtain a first target signal, and removing the noise signal of the deceleration signal to obtain a first deceleration signal;
removing abnormal data of the first target signal to obtain a second target signal, and removing abnormal data of the first deceleration signal to obtain a second deceleration signal;
the determining a target fitting curve of the brake pedal sensing performance according to the target signal and the deceleration signal comprises:
and determining the target fitting curve according to the second target signal and the second deceleration signal.
Optionally, the determining a target fitting curve of the brake pedal sensing performance according to the target signal and the deceleration signal includes:
and determining the target fitting curve by taking the target signal as a signal corresponding to a dependent variable and taking the deceleration signal as a signal corresponding to an independent variable.
Optionally, the dividing the target fitting curve into N stages and determining the brake pedal feel performance corresponding to each stage according to a preset reference curve includes:
dividing the target fitting curve into the N stages according to a preset deceleration interval;
acquiring target data corresponding to each stage;
acquiring target reference data corresponding to each stage based on the preset reference curve;
and determining an error between the target data and the target reference data of each stage, and determining the brake pedal feeling performance of each stage according to the corresponding error of each stage.
Optionally, the determining the brake pedal feel performance of each stage according to the error corresponding to each stage includes:
for each stage, determining a target error range corresponding to the error of the stage;
and determining a target brake pedal sensing performance grade corresponding to the target error range based on a first preset corresponding relation between the error range and the brake pedal sensing performance grade.
Optionally, after determining the target brake pedal sensing performance level corresponding to the target error range, the method further comprises:
determining a target display mode corresponding to the target brake pedal sensing performance grade according to a second preset corresponding relation between the brake pedal sensing performance grade and the display mode;
and displaying the target fitting curve according to the target display mode.
In a second aspect, embodiments of the present specification provide a brake pedal feel performance determining apparatus, the apparatus comprising:
the device comprises an acquisition module, a judgment module and a control module, wherein the acquisition module is used for acquiring a target signal detected by a brake pedal of a target vehicle in a process of being pressed down and a deceleration signal of the target vehicle, and the target signal is a signal for representing the inductive property of the brake pedal;
the curve fitting module is used for determining a target fitting curve of the inductive performance of the brake pedal according to the target signal and the deceleration signal;
and the brake pedal feeling performance determining module is used for dividing the target fitting curve into N stages and determining the brake pedal feeling performance corresponding to each stage according to a preset reference curve, wherein N is a positive integer.
Optionally, the target signal comprises one or more of the following signals: a pedal feedback force signal of the brake pedal, a displacement signal of the brake pedal, and a master cylinder oil pressure signal of the target vehicle.
Optionally, the apparatus further comprises:
the de-noising module is used for removing the noise signal of the target signal to obtain a first target signal and removing the noise signal of the deceleration signal to obtain a first deceleration signal;
the abnormal data removing module is used for removing abnormal data of the first target signal to obtain a second target signal and removing abnormal data of the first deceleration signal to obtain a second deceleration signal;
the determining a target fitting curve of the brake pedal sensing performance according to the target signal and the deceleration signal comprises:
and determining the target fitting curve according to the second target signal and the second deceleration signal.
Optionally, the curve fitting module is configured to:
and determining the target fitting curve by taking the target signal as a signal corresponding to a dependent variable and taking the deceleration signal as a signal corresponding to an independent variable.
Optionally, the brake pedal feel performance determination module is configured to:
dividing the target fitting curve into the N stages according to a preset deceleration interval;
acquiring target data corresponding to each stage;
acquiring target reference data corresponding to each stage based on the preset reference curve;
and determining an error between the target data and the target reference data of each stage, and determining the brake pedal feeling performance of each stage according to the corresponding error of each stage.
Optionally, the brake pedal feel performance determination module is configured to:
for each stage, determining a target error range corresponding to the error of the stage;
and determining a target brake pedal sensing performance grade corresponding to the target error range based on a first preset corresponding relation between the error range and the brake pedal sensing performance grade.
Optionally, the apparatus further comprises:
the display mode determining module is used for determining a target display mode corresponding to the target brake pedal inductive performance grade according to a second preset corresponding relation between the brake pedal inductive performance grade and the display mode;
and the display module is used for displaying the target fitting curve according to the target display mode.
In a third aspect, embodiments of the present specification provide a server, including a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor performs the steps of any one of the methods described above.
In a fourth aspect, the present specification provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor implements the steps of any of the above methods.
The embodiment of the specification has the following beneficial effects:
in the embodiment of the specification, when analyzing the brake pedal sensing performance of a target vehicle, a target signal detected in the process that a brake pedal is pressed down and deceleration information of the target vehicle are obtained, wherein the target signal is a signal for representing the brake pedal sensing performance; determining a target fitting curve of the new energy of the brake pedal feeling according to the target signal and the deceleration signal; and further dividing the target fitting curve into N stages, and determining the brake pedal feel performance corresponding to each stage according to a preset reference curve. In the scheme, the brake pedal feel performance can be automatically analyzed according to the relation between the target fitting curve and the preset reference curve, the automation of brake pedal feel performance analysis is realized, the analysis efficiency is improved, in addition, the target fitting curve is divided into N stages, and the brake pedal feel performance is determined stage by stage, so that the analysis of the brake pedal feel performance is more accurate.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the specification. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a flowchart of a brake pedal feel performance determination method provided in a first aspect of an embodiment of the present specification;
fig. 2 is an assembly schematic diagram of a force sensor and a distance sensor provided in an embodiment of the present disclosure;
FIG. 3 is a schematic assembly diagram of a master cylinder oil pressure sensor and an acceleration sensor provided in an embodiment of the present disclosure;
FIG. 4 is a schematic diagram of a brake pedal sensitivity determination system provided in an embodiment of the present disclosure;
fig. 5 is a schematic diagram of a brake pedal feel performance determining apparatus provided in a second aspect of the embodiment of the present specification.
Detailed Description
In order to better understand the technical solutions, the technical solutions of the embodiments of the present specification are described in detail below with reference to the drawings and specific embodiments, and it should be understood that the specific features of the embodiments and embodiments of the present specification are detailed descriptions of the technical solutions of the embodiments of the present specification, and are not limitations of the technical solutions of the present specification, and the technical features of the embodiments and embodiments of the present specification may be combined with each other without conflict.
In a first aspect, an embodiment of the present specification provides a method for determining a brake pedal feel performance, which is a flowchart of the method for determining a brake pedal feel performance provided by the embodiment of the present specification, as shown in fig. 1, and includes the following steps:
step S11: acquiring a target signal detected by a brake pedal of a target vehicle in a process of being stepped down and a deceleration signal of the target vehicle, wherein the target signal is a signal for representing the inductive property of the brake pedal;
step S12: determining a target fitting curve of the inductive performance of the brake pedal according to the target signal and the deceleration signal;
step S13: and dividing the target fitting curve into N stages, and determining the brake pedal feel performance corresponding to each stage according to a preset reference curve, wherein N is a positive integer.
In step S11, the target vehicle may be any vehicle that requires determination of brake pedal feel performance, and when determining the brake pedal feel performance, the target vehicle may be placed in a traveling state and the brake pedal may be depressed in the traveling state, and since the displacement of the brake pedal (i.e., the depth to which the brake pedal is depressed) is proportional to the deceleration desired by the driver, and the greater the displacement of the brake pedal, the greater the force (pedal feedback force) fed back to the driver by the pedal, the above-mentioned signals may change as the brake pedal is depressed during the depression of the brake pedal.
In order to determine the brake pedal feel performance, a target signal is acquired during depression of the brake pedal. In the embodiment of the present specification, the target signal is a model for characterizing the inductive performance of the brake pedal, and may include one or more of the following signals: a pedal feedback force signal of the brake pedal, a displacement signal of the brake pedal, and a master cylinder oil pressure signal of the target vehicle.
The target vehicle may be provided with a plurality of sensors to acquire a target signal generated during depression of a brake pedal of the target vehicle and a deceleration signal. Taking the example that the target signal includes a pedal feedback force signal of a brake pedal, a displacement signal of the brake pedal, and a master cylinder oil pressure signal, the sensors may include a force sensor, a distance sensor, a master cylinder oil pressure sensor, and an acceleration sensor. For better understanding of the assembly of the sensors, please refer to fig. 2 and 3, wherein fig. 2 is a schematic diagram of the assembly of the force sensor and the distance sensor, and fig. 3 is a schematic diagram of the assembly of the master cylinder oil pressure sensor and the acceleration sensor.
As shown in fig. 2 and 3, the force sensor is attached to the upper surface of the brake pedal and used for collecting a pedal feedback force signal, the distance sensor is fixed to the back surface of the pedal pad and used for collecting a displacement signal of the brake pedal, the master cylinder oil pressure sensor can be assembled with the master cylinder of the brake system through the adapter and used for collecting a master cylinder oil pressure signal, and the acceleration sensor is fixed to the position of the center of mass of the target vehicle and used for collecting a deceleration signal of the vehicle.
After the target signal and the deceleration signal are acquired, step S12 is executed to determine a target fitting curve of the brake pedal feel performance based on the target signal and the deceleration signal. In particular implementations, if the target signal includes multiple signals, multiple target fit curves may be determined based on the relationship between each target signal and the deceleration signal.
In this embodiment, in order to ensure that the determined target fitting curve is more accurate and reasonable, after obtaining the target signal and the deceleration signal, the following steps may be further included: removing the noise signal of the target signal to obtain a first target signal, and removing the noise signal of the deceleration signal to obtain a first deceleration signal; and removing abnormal data of the first target signal to obtain a second target signal, and removing abnormal data of the first deceleration signal to obtain a second deceleration signal.
Specifically, after the target signal and the deceleration signal are acquired, denoising processing may be performed in various ways, in this embodiment, a kalman filter algorithm is used to remove a noise signal from the target signal and the deceleration signal, respectively, so as to obtain a first target signal and a first deceleration signal after noise removal. Further, the abnormal data removal is performed on the first target signal and the first deceleration signal, specifically, each target signal is set with a corresponding preset data range, for example, the range of pedal feedback force is 0-500N, the range of brake pedal displacement is 0-70 mm, and the range of deceleration is 0-11 m/s2And if the data outside the preset data range belong to abnormal data, removing the abnormal data to obtain a valid second target signal and a second deceleration signal. Further, when the target fitting curve is determined, the target fitting curve is calculated according to the processed second target signal and the second deceleration signal.
In the embodiment of the present specification, when determining the target fitting curve, the following may be implemented: and determining the target fitting curve by taking the target signal as a signal corresponding to a dependent variable and taking the deceleration signal as a signal corresponding to an independent variable.
For example, if the target signal includes a pedal feedback force signal of a brake pedal, a displacement signal of the brake pedal, and a master cylinder oil pressure signal, for example, when determining the target fitting curve, curve fitting is performed using the deceleration signal as an independent variable and the pedal feedback force signal, the displacement signal of the brake pedal, and the master cylinder oil pressure signal as dependent variables, and the obtained target fitting curve includes three curves, which are a fitting curve between the pedal feedback force and the deceleration, a fitting curve between the displacement of the brake pedal and the deceleration, and a fitting curve between the master cylinder oil pressure and the deceleration.
In the embodiment of the present description, after the target fitting curve is obtained, the target fitting curve may be displayed through a display module, where the display module may be a display module disposed on a target vehicle, or may also be a display module of a system for testing a feel of a brake pedal, and is not limited herein.
Further, after the target fitting curve is obtained, step S13 is executed to determine the brake pedal feel performance of the target vehicle. Specifically, the target fitting curve is divided into N stages, and the dividing manner may be set according to actual needs, for example, the target fitting curve is randomly divided into N stages, or divided at predetermined intervals, and the like, which is not limited herein.
The preset reference curve may be a preset curve, and the independent variable and the dependent variable corresponding to the preset reference curve are the same as the target fitting curve, for example, when the target fitting curve is a curve between deceleration and pedal feedback force, the preset reference curve is also a curve between deceleration and pedal feedback force.
In the embodiment of the present specification, the brake pedal feel performance varies according to the vehicle type, and therefore, in order to better meet the brake pedal feel performance of each vehicle type, a preset reference curve corresponding to the vehicle type may be set according to each vehicle type. For example, for the vehicle type a, the preset reference curve of the vehicle type a may be determined by collecting the signal related to the brake pedal sensing performance of the vehicle type a, and for the vehicle type B, the preset reference curve of the vehicle type B may be determined by collecting the signal related to the brake pedal sensing performance of the vehicle type B. Therefore, when the brake pedal feel performance of the target vehicle is evaluated, the type of the target vehicle can be obtained, and the corresponding preset reference curve is selected according to the type of the target vehicle so as to analyze and evaluate the brake pedal feel performance of the target vehicle.
In the specific implementation process, when the brake pedal feel performance of the N stages of the target fitting curve is determined according to the preset reference curve, the determination may be implemented in various ways, for example, the preset reference curve is divided into N stages according to the dividing way of the target fitting curve, the N stages of the preset reference curve are correspondingly compared with the N stages of the target fitting curve, the matching degree between the target fitting curve and the preset reference curve in each stage is determined, and if the matching degree is high, it is indicated that the brake pedal feel performance is high, and if the matching degree is low, it is indicated that the brake pedal feel performance is low.
In the embodiments of the present specification, the following manner may be employed to determine the brake pedal feel performance: dividing the target fitting curve into the N stages according to a preset deceleration interval; acquiring target data corresponding to each stage; acquiring target reference data corresponding to each stage based on the preset reference curve; and determining an error between the target data and the target reference data of each stage, and determining the brake pedal feeling performance of each stage according to the corresponding error of each stage.
Specifically, since the argument of the target fitting curve is deceleration, it is possible to divide the deceleration interval by a predetermined deceleration interval, that is, by dividing the abscissa of the target fitting curve, for example, the deceleration range of the target fitting curve is 0 to 10m/s2The predetermined deceleration interval is 1m/s2Then, 10 points 1, 2, and 3 … 10 can be determined on the abscissa of the target fitting curve, the target fitting curve is divided into 10 stages according to the 10 points, and the 10 stages correspond to the abscissasThe coordinate intervals are 0-1 m/s respectively2，1～2m/s2，…9～10m/s2。
Further, the target data corresponding to each stage is obtained, and for a stage, the target data may be an average value of dependent variables (i.e., vertical coordinates) of the target fitting curve in the stage, may also be a value of the dependent variable at a certain point in the stage, and may also be values of all the dependent variables included in the stage. Taking the target data as the value of the dependent variable at a certain point in each step as an example, if the target data is the value of the dependent variable corresponding to the maximum deceleration in each step, for example, the deceleration is 0-1 m/s2In the stage, the target data is 1m/s2The corresponding dependent variable value is 1-2 m/s at deceleration2In the stage, the target data is 2m/s2The corresponding dependent variable values, and so on, if the example of 10 phases above is followed, 10 target data are determined.
Correspondingly, the target reference data is data determined on a preset reference curve according to each target data, that is, for each target data, one target reference data corresponds to each target data. Following the above example, if there are 10 stages, the target data of each stage is the dependent variable value corresponding to the maximum deceleration in the stage, for example, the maximum deceleration of each stage is 1m/s2、2m/s2、3m/s2…10m/s2Then, the target reference data is the value of the dependent variable corresponding to the maximum deceleration of each stage on the preset reference curve. Of course, the target reference data may also be a set of preset data, and may be directly read without calculation through a preset reference curve, which is not limited herein.
Further, an error between the target data and the target reference data is calculated, and for each phase, the target data Y corresponding to the phase is calculatedNAnd target reference data for the stage, the error between the two may be calculated by: a ═ YN-Y)/Yx 100%, wherein A is the error between the two. For each stage, the above formula can be used to calculate the error of the stageAnd (4) poor.
In the embodiment of the present specification, determining the brake pedal feel performance in each stage by the error in each stage may be implemented by: for each stage, determining a target error range corresponding to the error of the stage; and determining a target brake pedal sensing performance grade corresponding to the target error range based on a first preset corresponding relation between the error range and the brake pedal sensing performance grade.
In a specific implementation process, the first preset corresponding relationship between the error range and the brake pedal feel performance level may be set according to actual needs, for example, the brake pedal feel performance level is divided into 4 levels, the error range corresponding to the first performance level is less than or equal to 5%, the error range corresponding to the second performance level is greater than 5% and less than or equal to 15%, the error range corresponding to the third performance level is greater than 15% and less than or equal to 50%, and the error range corresponding to the fourth performance level is greater than 50%. After the error of each stage is obtained, if the error of a certain stage is 3%, it may be determined that the error belongs to the target error range of 5% or less, and further, the target brake pedal sensing performance level corresponding to the target error range is determined as the first performance level.
Further, after determining the target brake pedal sensitivity level corresponding to the target range, the following steps may be further performed: determining a target display mode corresponding to the target brake pedal sensing performance grade according to a second preset corresponding relation between the brake pedal sensing performance grade and the display mode; and displaying the target fitting curve according to the target display mode.
Specifically, different display modes can be used for distinguishing different brake pedal sensing performance levels, so that a user can visually observe which phase curve corresponds to the brake pedal sensing performance needing to be optimized. The second preset corresponding relationship between the brake pedal sensing performance level and the display mode can be set according to actual needs, for example, the display mode is display color, the shape of a curve line, and the like. Taking the display mode as an example of displaying colors, the second preset correspondence relationship may be a correspondence relationship between the brake pedal sensitivity level and the color output signal, and the above four performance levels are still used, where the color output signal L corresponding to the first performance level is 00, the color output signal L corresponding to the second performance level is 01, the color output signal L corresponding to the third performance level is 10, and the color output signal L corresponding to the fourth performance level is 11 (invalid value). For example, the curve is not displayed when the display color corresponding to L00 is green, the display color corresponding to L01 is yellow, the display color corresponding to L10 is red, and L11 is an invalid value.
Through the method, the display mode of each of the N stages of the target fitting curve can be obtained, and each stage is displayed according to the corresponding display mode. Further, whether the performance of the brake pedal at each stage needs to be improved or not can be determined according to the performance level of the brake pedal at each stage, and an improvement direction is prompted, for example, when a certain stage of a target fitting curve is a first performance level, it is indicated that the curve at the stage meets a target requirement, and improvement is not needed; when a certain stage is a second performance level, prompting that the curve of the stage can be optimized, wherein the optimization direction is that the error A is less than or equal to 5 percent; when a certain stage is a third performance level, prompting that the curve of the stage needs to be optimized, wherein the optimization direction is that the error A is less than or equal to 15 percent; at some stage, a fourth performance level, the prompt is invalid.
Further, the brake pedal sensitivity determination system according to the embodiment of the present disclosure is further provided, as shown in fig. 4, the system includes an acquisition module, a processing module, a calculation module, a display module, and a storage module, where the processing module, the calculation module, and the storage module are disposed in the processor. The acquisition module is used for acquiring a target signal and a deceleration signal; the processing module is connected with the acquisition module and is used for removing noise signals and abnormal data from the signals acquired by the acquisition module; the storage module is connected with the processing module and the calculation module and is used for storing preset reference curves of all vehicle types and effective ranges of all signals, and if new data are stored to exceed the storage space, the oldest stored data can be covered; the calculation module is connected with the processing module and is used for performing related calculation for determining the inductive performance of the brake pedal; and the display module is connected with the processing module and is used for displaying the target fitting curve.
In summary, the method provided by the embodiment of the present specification can select different preset reference curves for different vehicle types, so that the finally determined brake pedal feel performance is more accurate; and the inductive performance of the brake pedal is determined by stages through the target fitting curve, and is displayed in different display modes, so that the quality of the inductive performance of the brake pedal is displayed more intuitively. In addition, the system provided in the embodiment of the specification determines the inductive performance of the brake pedal through an external independent module, is suitable for the used vehicle, and does not occupy the electric and whole vehicle network resources of the vehicle.
In a second aspect, based on the same inventive concept, embodiments of the present specification provide a brake pedal feel performance determination apparatus, please refer to fig. 5, including:
an obtaining module 51, configured to obtain a target signal detected by a brake pedal of a target vehicle during being pressed, and a deceleration signal of the target vehicle, where the target signal is a signal representing inductive performance of the brake pedal;
a curve fitting module 52, configured to determine a target fitting curve of the brake pedal sensing performance according to the target signal and the deceleration signal;
and a brake pedal feel performance determining module 53, configured to divide the target fitted curve into N stages, and determine, according to a preset reference curve, a brake pedal feel performance corresponding to each stage, where N is a positive integer.
Optionally, the target signal comprises one or more of the following signals: a pedal feedback force signal of the brake pedal, a displacement signal of the brake pedal, and a master cylinder oil pressure signal of the target vehicle.
Optionally, the apparatus further comprises:
the de-noising module is used for removing the noise signal of the target signal to obtain a first target signal and removing the noise signal of the deceleration signal to obtain a first deceleration signal;
the abnormal data removing module is used for removing abnormal data of the first target signal to obtain a second target signal and removing abnormal data of the first deceleration signal to obtain a second deceleration signal;
the determining a target fitting curve of the brake pedal sensing performance according to the target signal and the deceleration signal comprises:
and determining the target fitting curve according to the second target signal and the second deceleration signal.
Optionally, the curve fitting module is configured to:
and determining the target fitting curve by taking the target signal as a signal corresponding to a dependent variable and taking the deceleration signal as a signal corresponding to an independent variable.
Optionally, the brake pedal feel performance determination module is configured to:
dividing the target fitting curve into the N stages according to a preset deceleration interval;
acquiring target data corresponding to each stage;
acquiring target reference data corresponding to each stage based on the preset reference curve;
and determining an error between the target data and the target reference data of each stage, and determining the brake pedal feeling performance of each stage according to the corresponding error of each stage.
Optionally, the brake pedal feel performance determination module is configured to:
for each stage, determining a target error range corresponding to the error of the stage;
and determining a target brake pedal sensing performance grade corresponding to the target error range based on a first preset corresponding relation between the error range and the brake pedal sensing performance grade.
Optionally, the apparatus further comprises:
the display mode determining module is used for determining a target display mode corresponding to the target brake pedal inductive performance grade according to a second preset corresponding relation between the brake pedal inductive performance grade and the display mode;
and the display module is used for displaying the target fitting curve according to the target display mode.
With regard to the above-described apparatus, the specific functions of the respective modules have been described in detail in the embodiment of the brake pedal feel performance determination method provided in the embodiment of the present specification, and will not be described in detail here.
In a third aspect, based on the same inventive concept as the brake pedal feel performance determination method in the previous embodiment, the present specification further provides a brake pedal feel performance determination apparatus, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of any one of the brake pedal feel performance determination methods when executing the program.
In a fourth aspect, based on the inventive concept of the brake pedal feel performance determination method in the foregoing embodiments, the present specification further provides a computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the steps of any one of the brake pedal feel performance determination methods described above.
The description has been presented with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the description. 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.
While preferred embodiments of the present specification have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all changes and modifications that fall within the scope of the specification.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present specification without departing from the spirit and scope of the specification. Thus, if such modifications and variations of the present specification fall within the scope of the claims of the present specification and their equivalents, the specification is intended to include such modifications and variations.
Claims (10)
1. A brake pedal feel performance determination method, characterized by comprising:
acquiring a target signal detected by a brake pedal of a target vehicle in a process of being stepped down and a deceleration signal of the target vehicle, wherein the target signal is a signal for representing the inductive property of the brake pedal;
determining a target fitting curve of the inductive performance of the brake pedal according to the target signal and the deceleration signal;
and dividing the target fitting curve into N stages, and determining the brake pedal feel performance corresponding to each stage according to a preset reference curve, wherein N is a positive integer.
2. The method of claim 1, wherein the target signal comprises one or more of: a pedal feedback force signal of the brake pedal, a displacement signal of the brake pedal, and a master cylinder oil pressure signal of the target vehicle.
3. The method according to claim 1 or 2, characterized in that after the obtaining of the target signal detected during depression of a brake pedal of a target vehicle and the deceleration signal of the target vehicle, the method further comprises:
removing the noise signal of the target signal to obtain a first target signal, and removing the noise signal of the deceleration signal to obtain a first deceleration signal;
removing abnormal data of the first target signal to obtain a second target signal, and removing abnormal data of the first deceleration signal to obtain a second deceleration signal;
the determining a target fitting curve of the brake pedal sensing performance according to the target signal and the deceleration signal comprises:
and determining the target fitting curve according to the second target signal and the second deceleration signal.
4. The method of claim 1 or 2, wherein determining a target fit curve of the brake pedal sensing performance based on the target signal and the deceleration signal comprises:
and determining the target fitting curve by taking the target signal as a signal corresponding to a dependent variable and taking the deceleration signal as a signal corresponding to an independent variable.
5. The method according to claim 1 or 2, wherein the dividing the target fitting curve into N stages and determining the brake pedal feel performance corresponding to each stage according to a preset reference curve comprises:
dividing the target fitting curve into the N stages according to a preset deceleration interval;
acquiring target data corresponding to each stage;
acquiring target reference data corresponding to each stage based on the preset reference curve;
and determining an error between the target data and the target reference data of each stage, and determining the brake pedal feeling performance of each stage according to the corresponding error of each stage.
6. The method of claim 5, wherein determining the brake pedal feel performance for each phase based on the error associated with each phase comprises:
for each stage, determining a target error range corresponding to the error of the stage;
and determining a target brake pedal sensing performance grade corresponding to the target error range based on a first preset corresponding relation between the error range and the brake pedal sensing performance grade.
7. The method of claim 6, wherein after determining the target brake pedal feel level corresponding to the target error range, the method further comprises:
determining a target display mode corresponding to the target brake pedal sensing performance grade according to a second preset corresponding relation between the brake pedal sensing performance grade and the display mode;
and displaying the target fitting curve according to the target display mode.
8. A brake pedal feel performance determining apparatus, characterized by comprising:
the device comprises an acquisition module, a judgment module and a control module, wherein the acquisition module is used for acquiring a target signal detected by a brake pedal of a target vehicle in a process of being pressed down and a deceleration signal of the target vehicle, and the target signal is a signal for representing the inductive property of the brake pedal;
the curve fitting module is used for determining a target fitting curve of the inductive performance of the brake pedal according to the target signal and the deceleration signal;
and the brake pedal feeling performance determining module is used for dividing the target fitting curve into N stages and determining the brake pedal feeling performance corresponding to each stage according to a preset reference curve, wherein N is a positive integer.
9. A brake pedal feel performance determining apparatus comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method of any one of claims 1 to 7 when executing the program.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 7.
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