Accelerated duty test method, device, equipment, storage medium and computer product

Abstract

The application relates to the technical field of vehicles and discloses an acceleration working condition test method, device, equipment, storage medium and computer product, which comprises the following steps: obtaining an initial road spectrum based on the acceleration characteristics of a vehicle to be tested and collected vehicle load signals and throttle pedal position signals; obtaining an equivalent load spectrum with increased load frequency by amplifying the load frequency in the initial road spectrum, and obtaining a target time domain signal of the acceleration working condition; obtaining a vehicle driving spectrum by performing time domain signal iteration on the target time domain signal; and performing acceleration working condition test through the vehicle driving spectrum. The application can realize the examination of the acceleration working condition by increasing the loading of the acceleration working condition on the basis of a 24-channel road simulation test bench, the road simulation test is more comprehensive, and the accuracy of the whole vehicle durability test is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to an acceleration working condition test method, device, equipment, storage medium and computer product. BACKGROUND

[0002] At present, the durability test of vehicles and parts is mainly completed through real vehicle road durability test and indoor bench durability test. The real vehicle road durability test is to install all parts of the vehicle according to the assembly requirements, and then to conduct road test in the test field to simulate the most severe working condition of user use, including vibration road, torsion road, acceleration road and high-speed road and other strengthened road surfaces.

[0003] The indoor bench durability test includes equal amplitude loading and road spectrum loading. The equal amplitude loading is to cycle load the vehicle system and parts with equal amplitude, and at present, most of the part durability tests adopt this method. The road spectrum loading is to simulate the road load on the bench based on the road load simulation technology to conduct single-channel or multi-channel durability test, and at present, there are mainly twenty-four channel road simulation tests. However, the test can only realize the load simulation of six degrees of freedom, including longitudinal, vertical, longitudinal, braking, steering and inclination, and cannot simulate the structure durability test of the acceleration working condition for the chassis and vehicle body structure. Since the acceleration working condition is a common working condition of durability road test, it is necessary to increase the simulation of the acceleration working condition for the vehicle. SUMMARY

[0004] The present application aims to provide an acceleration working condition test method, device, equipment, storage medium and computer product, and aims to solve the technical problem of lacking simulation of the structure durability test of the acceleration working condition for the chassis and vehicle body structure.

[0005] To achieve the above-mentioned purpose, the present application provides an acceleration working condition test method, which comprises:

[0006] obtaining an initial road spectrum based on the acceleration characteristics of the vehicle to be tested and the collected vehicle load signal and throttle pedal position signal;

[0007] amplifying the load frequency in the initial road spectrum to obtain an equivalent load spectrum with increased load frequency, and obtaining a target time domain signal of the acceleration working condition;

[0008] obtaining a vehicle driving spectrum by iterating the target time domain signal in time domain;

[0009] conducting acceleration working condition test through the vehicle driving spectrum.

[0010] In an embodiment, the step of obtaining an initial road spectrum based on the acceleration characteristics of the vehicle to be tested and the collected vehicle load signal and throttle pedal position signal comprises:

[0011] controlling a road spectrum acquisition device to acquire the vehicle load signal;

[0012] controlling a pedal position sensor to synchronously acquire the accelerator pedal position signal;

[0013] acquiring an original signal according to the vehicle load signal and the accelerator pedal position signal;

[0014] acquiring the initial road spectrum by clipping, filtering and combining the original signal.

[0015] In an embodiment, the step of controlling the pedal position sensor to synchronously acquire the accelerator pedal position signal comprises:

[0016] controlling the pedal position sensor to synchronously acquire a pedal position depth and a time domain signal corresponding to an acceleration working condition of the vehicle to be tested;

[0017] acquiring the accelerator pedal position signal according to the pedal position depth and the time domain signal.

[0018] In an embodiment, the step of amplifying the load frequency in the initial road spectrum to acquire an equivalent load spectrum with increased load frequency and acquiring a target time domain signal of the acceleration working condition comprises:

[0019] multiplying the pedal position depth and the time domain signal by a preset proportionality coefficient to acquire an amplified pedal position depth and an amplified time domain signal;

[0020] acquiring the target time domain signal according to the amplified pedal position depth and the amplified time domain signal.

[0021] In an embodiment, before the step of acquiring the vehicle drive spectrum by iteratively processing the target time domain signal, the method further comprises:

[0022] acquiring a first target response signal of the acceleration working condition and a second target response signal of the remaining working conditions of the vehicle in the initial road spectrum;

[0023] acquiring an analog response signal and the accelerator pedal position signal;

[0024] when the first target response signal is equal to the pedal position response signal and the second target response signal is equal to the analog response signal, performing the step of acquiring the vehicle drive spectrum by iteratively processing the target time domain signal.

[0025] In an embodiment, the step of testing the acceleration working condition according to the vehicle drive spectrum comprises:

[0026] acquiring a target drive signal according to the vehicle drive spectrum;

[0027] The acceleration working condition test is performed through the target driving signal.

[0028] In addition, to achieve the above object, the application further provides an acceleration working condition test device, which comprises:

[0029] The signal acquisition module is configured to acquire an initial road spectrum based on the acceleration characteristics of the vehicle to be tested and the collected vehicle load signal and accelerator pedal position signal.

[0030] The signal amplification module is configured to amplify the load frequency in the initial road spectrum to obtain an equivalent load spectrum with increased load frequency, and to obtain a target time domain signal of the acceleration working condition.

[0031] The signal reproduction module is configured to acquire a vehicle driving spectrum by performing time domain signal iteration on the target time domain signal.

[0032] The test driving module is configured to perform the acceleration working condition test through the vehicle driving spectrum.

[0033] In addition, to achieve the above object, the application further provides an acceleration working condition test device, which comprises a memory, a processor and a computer program stored in the memory and executable on the processor, and the computer program is configured to implement the steps of the acceleration working condition test method.

[0034] In addition, to achieve the above object, the application further provides a storage medium, which is a computer readable storage medium, and the storage medium stores a computer program, and the computer program is executed by a processor to implement the steps of the acceleration working condition test method.

[0035] In addition, to achieve the above object, the application further provides a computer program product, which comprises a computer program, and the computer program is executed by a processor to implement the acceleration working condition test method.

[0036] The application provides an acceleration working condition test method, which comprises: acquiring an initial road spectrum based on the acceleration characteristics of the vehicle to be tested and the collected vehicle load signal and accelerator pedal position signal; amplifying the load frequency in the initial road spectrum to obtain an equivalent load spectrum with increased load frequency, and obtaining a target time domain signal of the acceleration working condition; acquiring a vehicle driving spectrum by performing time domain signal iteration on the target time domain signal; and performing the acceleration working condition test through the vehicle driving spectrum. The application increases the loading of the acceleration working condition on the basis of the twenty-four-channel road simulation test bench, can realize the evaluation of the acceleration working condition, makes the road simulation test more comprehensive, and improves the accuracy of the whole vehicle durability test. BRIEF DESCRIPTION OF DRAWINGS

[0037] The accompanying drawings, which are incorporated into and form a part of the specification, illustrate preferred embodiments of the present application and, together with the description, serve to explain the principles of the application.

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, those skilled in the art can obtain other drawings from these drawings without any creative effort.

[0039] Figure 1 A flowchart provided for the embodiment one of the acceleration working condition test method of the present application;

[0040] Figure 2 A flowchart provided for the embodiment two of the acceleration working condition test method of the present application;

[0041] Figure 3 A flowchart provided for the embodiment three of the acceleration working condition test method of the present application;

[0042] Figure 4 A module structure diagram of the acceleration working condition test device of the embodiment of the present application;

[0043] Figure 5 An acceleration working condition test device structure diagram of the hardware running environment involved in the acceleration working condition test method in the embodiment of the present application.

[0044] The object realization, functional features and advantages of the present application will be further explained with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0045] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application, and are not used to limit the present application.

[0046] In order to better understand the technical solutions of the present application, the following will be described in detail in combination with the drawings in the specification and the specific embodiments.

[0047] The main solution of the embodiment of the present application is: based on the acceleration characteristics of the vehicle to be tested and the collected vehicle load signal and throttle pedal position signal, an initial road spectrum is obtained; the load frequency in the initial road spectrum is amplified to obtain an equivalent load spectrum with increased load frequency, and a target time domain signal of the acceleration working condition is obtained; the vehicle driving spectrum is obtained by iterating the target time domain signal; and the acceleration working condition test is performed through the vehicle driving spectrum.

[0048] Since the road spectrum loading is based on the road load simulation technology to simulate the road load on the bench to carry out single-channel or multi-channel durability test, at present, there are mainly twenty-four channel road simulation tests, and the test can only realize the load simulation of six degrees of freedom, i.e., longitudinal, vertical, longitudinal, braking, steering and inclination, and cannot simulate the structure durability test of the chassis and the vehicle body structure under the acceleration working condition, and the acceleration working condition is a common working condition of the durability road test, so it is necessary to increase the simulation of the acceleration working condition of the vehicle.

[0049] The present application increases the loading of the acceleration working condition on the basis of the twenty-four channel road simulation test bench, can realize the test of the acceleration working condition, makes the road simulation test more comprehensive, and improves the accuracy of the whole vehicle durability test.

[0050] It should be noted that the execution subject of the present embodiment can be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or an acceleration working condition test device capable of realizing the above functions. The following will take the acceleration working condition test device as an example to describe the present embodiment and each of the following embodiments.

[0051] Based on this, the present embodiment provides an acceleration working condition test method, which is described with reference to Figure 1 , Figure 1 The flowchart provided by the first embodiment of the acceleration working condition test method of the present application is shown.

[0052] In the present embodiment, the acceleration working condition test method comprises steps S10-S40:

[0053] Step S10: obtaining an initial road spectrum based on the acceleration characteristics of the vehicle to be tested and the collected vehicle load signal and accelerator pedal position signal.

[0054] It should be noted that the acceleration characteristics of the vehicle refer to the ability of the vehicle to rapidly improve the driving speed, which is an important indicator for evaluating the power level of the vehicle. Generally, the acceleration performance can be measured by the acceleration time from 0 to 100 kilometers per hour, and the shorter the time, the better the acceleration performance of the vehicle. The acceleration performance not only affects the driving pleasure of the vehicle, but also relates to the safety and practicability in the actual driving scenes such as overtaking and climbing.

[0055] It should be understood that vehicle load signals generally refer to the changes in load experienced by a vehicle during operation due to road irregularities, vehicle dynamics, and other external forces. These load signals can include vertical forces, lateral forces, longitudinal forces, bending moments, torques, etc., which are important parameters for evaluating vehicle structural strength, durability, and ride comfort. In the definition of vehicle load signals, six-component force signals are a common concept, which are acquired by six-component force sensors and can simultaneously acquire eight signals such as vertical force (Fz), horizontal force (Fx, Fy), bending moment (Mx, My), and torque (Mz) of the wheel center position. In addition, acceleration signals are also part of the vehicle load signals, which can be obtained by acceleration sensors to analyze the vibration characteristics and response behavior of the vehicle. In practical applications, the acquisition and analysis of load signals help vehicle manufacturers predict potential structural problems during the design stage, optimize vehicle performance, and provide guidance during the use and maintenance of the vehicle.

[0056] It should be noted that the vehicle throttle pedal position signal is generated by a throttle pedal position sensor, which is usually installed inside the throttle pedal to monitor the position change of the throttle pedal. When the driver steps on or releases the throttle pedal, the sensor converts the physical displacement of the pedal into electrical signals, which are then sent to the vehicle's electronic control unit (ECU). The ECU calculates the corresponding fuel injection amount and ignition timing based on these signals to control the power output of the engine.

[0057] It should be understood that the vehicle is tested under actual road conditions to collect acceleration characteristic data, vehicle load signals, and throttle pedal position signals, which are usually recorded through sensors and data acquisition systems installed on the vehicle. The raw data collected needs to be processed to extract useful information about the dynamic behavior of the vehicle, which includes steps such as filtering, calibration, and data synchronization. Using the processed data, you can build an initial road profile of the vehicle. The road profile is a statistical model that describes the various working conditions (such as speed, acceleration, load, etc.) encountered by the vehicle in actual operation. By analyzing the acceleration characteristics, you can determine the acceleration pattern of the vehicle at different speeds, while the load signals and throttle pedal position signals help understand the power demand and response of the vehicle under these working conditions.

[0058] Step S20: amplify the load frequency in the initial road profile to obtain an equivalent load spectrum with increased load frequency, and obtain the target time domain signal of the acceleration working condition.

[0059] It should be noted that a detailed analysis of the initial road spectrum is required to identify the distribution characteristics of the load frequency. This includes identifying the peak frequency, amplitude, and cycle count of the load, as well as other statistical parameters. Then, according to the design requirements or safety standards, the equivalent amplification factor is determined. This factor will be used to amplify the load frequency in the initial road spectrum to simulate more severe working conditions or expected load growth. The amplification factor is applied to the load frequency in the initial road spectrum to adjust the load spectrum to reflect the increased equivalent load. This involves recalculating each load level in the load spectrum to ensure that the amplified load spectrum accurately reflects the increased load effect. Finally, the equivalent load spectrum is Fourier transformed into the target time-domain signal of the accelerated working condition.

[0060] Step S30: Obtain the vehicle drive spectrum by iterating the target time-domain signal in the time domain.

[0061] It should be understood that the target time-domain signal needs to be preprocessed, including denoising, smoothing, and standardization, etc., to improve the accuracy of subsequent analysis. Then, an iterative algorithm is applied to process the data. The iterative algorithm can be a control algorithm based on drive spectrum correction, which optimizes the reproduction of the drive spectrum through continuous iteration to improve the accuracy of vibration control. The power spectral density (PSD) is calculated from the target time-domain signal, which is a method of characterizing the energy distribution of a signal in the frequency domain. In the iteration process, techniques such as the Welch method can be used to estimate the power spectrum of the signal. Analyze the obtained power spectrum to extract the natural frequency, damping ratio and other dynamic characteristics of the vehicle, which constitute the drive spectrum of the vehicle.

[0062] It should be noted that in actual application, the selection and implementation details of the iterative algorithm will be adjusted according to specific engineering requirements and vehicle characteristics. For example, Newton's method can be used to derive the excitation spectrum iteration equation and propose a corresponding iterative correction algorithm to simplify the calculation amount and improve the real-time performance. In addition, time-domain signal analysis can reveal the electromagnetic test law under transient working conditions, propose an electromagnetic emission test method under transient working conditions, and improve the accuracy of vehicle EMC performance testing.

[0063] Step S40: Perform accelerated working condition test by the vehicle drive spectrum.

[0064] It should be understood that when performing the accelerated working condition test, the tester will drive the vehicle to perform multiple acceleration tests, record the data of each experiment, including acceleration, speed, acceleration time, etc. After data recording, detailed data analysis will be performed to calculate the average acceleration time and compare it with relevant standards or similar vehicles to evaluate the acceleration performance of the vehicle. Therefore, the number of plays needs to be preset to play the vehicle drive spectrum for accelerated working condition test.

[0065] The embodiment provides an accelerated working condition test method, which comprises the following steps: obtaining an initial road spectrum based on acceleration characteristics of a vehicle to be tested and collected vehicle load signals and accelerator pedal position signals; obtaining an equivalent load spectrum with increased load frequency by amplifying the load frequency in the initial road spectrum, so as to obtain a target time domain signal of the accelerated working condition; obtaining a vehicle driving spectrum by iteratively processing the target time domain signal; and performing accelerated working condition test by using the vehicle driving spectrum. The application can realize the examination of the accelerated working condition, make the road simulation test more comprehensive, and improve the accuracy of the whole vehicle durability test.

[0066] Based on the first embodiment of the application, the same or similar contents as the above-mentioned embodiment one can be referred to the above description, and the subsequent description will not be repeated. On this basis, please refer to Figure 2 , Figure 2 The flowchart of the second embodiment of the accelerated working condition test method of the application is shown in the figure. In step S10, the accelerated working condition test method further comprises the following steps:

[0067] Step S101: controlling a road spectrum acquisition device to acquire the vehicle load signals.

[0068] It should be understood that when acquiring the vehicle load signals, it is necessary to ensure that all sensors (such as six-component force sensors, acceleration sensors, strain gauges, etc.) are correctly installed on the vehicle and correctly connected with the data acquisition system (such as the IPETRONIK system). Necessary system calibration is performed, including bridge compensation and signal gain adjustment. Then, according to the test requirements, the appropriate sampling frequency is set. For example, if the acceleration signals are collected, the sampling frequency may need to be higher than twice the highest frequency component in the signal to avoid aliasing. At the same time, it is necessary to ensure that the data storage and transmission mechanism can handle the expected amount of data. Select representative test paths that can reflect various load conditions that the vehicle may encounter in actual use. During the test, strictly follow the predetermined speed and route to drive, so as to ensure the consistency and comparability of the load data. During the data acquisition process, real-time monitoring of sensor readings and system performance is performed to ensure that there is no data loss or noise interference. Filtering techniques are used to remove noise in the signal, but care should be taken not to filter out useful signal components. After the collection is completed, the original data is processed, including data cleaning, synchronization and analysis. Professional software (such as FlexPro) is used for data analysis to extract the load spectrum and other related engineering parameters.

[0069] Step S102: controlling a pedal position sensor to synchronously acquire the accelerator pedal position signals.

[0070] It should be noted that the displacement signals of the running shock absorber and suspension and the like are clipped, filtered, and combined with the accelerator pedal position signal; at the same time, the pedal position sensor synchronously collects the pedal position depth and the time domain signal corresponding to the acceleration working condition of the vehicle to be tested, and finally the pedal position depth and the time domain signal are used to obtain the accelerator pedal position signal.

[0071] Step S103: Obtain the original signal according to the vehicle load signal and the accelerator pedal position signal.

[0072] It should be understood that obtaining the original signal according to the vehicle load signal and the accelerator pedal position signal involves sensor data acquisition and signal processing of the vehicle. The vehicle load signal may come from a sensor in the vehicle suspension system, and the accelerator pedal position signal comes from an accelerator pedal position sensor. These signals are usually analog signals, which need to be converted into digital signals by a data acquisition system (DAQ) for processing and analysis by a computer system.

[0073] Step S104: Obtain the initial road spectrum by clipping, filtering, and combining the original signal.

[0074] It should be noted that in the process of obtaining the initial road spectrum of the vehicle, clipping, filtering, and combining of the original signal are key steps, which help to improve the quality and accuracy of the data. The clipping operation usually involves removing noise and outliers in the signal to ensure that only valid data related to vehicle driving is retained. The filtering operation is used to reduce high-frequency noise in the signal and retain useful low-frequency information, which is crucial for subsequent data analysis. The combination operation is to combine the signals collected by different sensors according to certain rules to construct a complete road spectrum data set.

[0075] In step S20, the acceleration working condition test method further comprises:

[0076] Step S201: Multiply the pedal position depth and the time domain signal by a predetermined scaling factor to obtain an amplified pedal position depth and an amplified time domain signal.

[0077] Step S202: Obtain the target time domain signal according to the amplified pedal position depth and the amplified time domain signal.

[0078] It should be understood that two predetermined scaling factors are first determined, one for amplifying the pedal position depth and the other for amplifying the time-domain signal. These coefficients can be set according to the system's requirements or design specifications. Multiply the pedal position depth by the first preset scaling factor to obtain the amplified pedal position depth. This step is to adjust the magnitude of the signal to make it more suitable for subsequent processing or analysis. Multiply the original time-domain signal by the second preset scaling factor to obtain the amplified time-domain signal. This amplification is to enhance certain features in the signal to facilitate detection or identification. Finally, generate the target time-domain signal based on the amplified pedal position depth and the amplified time-domain signal. This signal may be the input of a control algorithm or the object of further analysis.

[0079] In this embodiment, the control road spectrum acquisition device acquires the vehicle load signal; the control pedal position sensor synchronously acquires the accelerator pedal position signal; the original signal is obtained according to the vehicle load signal and the accelerator pedal position signal; the initial road spectrum is obtained by clipping, filtering and combining the original signal. At the same time, the pedal position depth and the time-domain signal are multiplied by a preset scaling factor to obtain an amplified pedal position depth and an amplified time-domain signal, and the target time-domain signal is obtained according to the amplified pedal position depth and the amplified time-domain signal. Not only improves the quality and accuracy of the target time-domain signal, but also improves the accuracy of the subsequent vehicle driving spectrum, making the road simulation test more comprehensive.

[0080] Based on the first embodiment and / or the second embodiment of the present application, in the third embodiment of the present application, the same or similar contents as the above-mentioned embodiments one and two can be referred to the above introduction, and the following will not be repeated. On this basis, please refer to Figure 3 , Figure 3 The flowchart provided for the third embodiment of the accelerated working condition test method of the present application. In step S30, the accelerated working condition test method further comprises:

[0081] Step S301: obtaining a first target response signal of the acceleration working condition in the initial road spectrum and a second target response signal of the whole vehicle working condition except the acceleration working condition.

[0082] It should be understood that the first target response signal refers to the response signal of the vehicle system (such as suspension, vehicle body, etc.) to the dynamic input (such as acceleration force) under a specific acceleration working condition. This is usually an important indicator in vehicle performance test, because it is directly related to the acceleration performance and ride comfort of the vehicle. The second target response signal refers to the response signal of the vehicle system to the dynamic input under other whole vehicle working conditions except the acceleration working condition. These working conditions may include uniform speed driving, deceleration, turning, etc., which together constitute various situations that the vehicle may encounter in daily use.

[0083] Step S302: Obtain the analog response signal and the throttle pedal position signal.

[0084] It should be noted that in the process of obtaining the analog response signal and the throttle pedal position signal, a special data acquisition system and sensor are usually required. The analog response signal may include analog output of various physical quantities, such as temperature, pressure, flow, etc., and the throttle pedal position signal is an electrical signal used to monitor the change of the throttle pedal position.

[0085] Step S303: When the first target response signal is equal to the pedal position response signal, and the second target response signal is equal to the analog response signal, execute the step of obtaining the vehicle drive spectrum by iterating the target time domain signal in time domain.

[0086] It should be understood that when the first target response signal is equal to the pedal position response signal, and the second target response signal is equal to the analog response signal, the acceleration condition target time domain signal is reproduced, and the accuracy of the vehicle drive spectrum is also ensured.

[0087] In step S40, the acceleration condition test method further comprises:

[0088] Step S401: Obtain the target drive signal according to the vehicle drive spectrum;

[0089] Step S402: Perform the acceleration condition test by the target drive signal.

[0090] It should be understood that the target drive signal can be calculated using a control algorithm based on the vehicle's drive spectrum and the current driving state. These signals guide the vehicle's power system (such as an electric motor or an internal combustion engine) to output power in the desired way to optimize the vehicle's performance, such as improving energy efficiency, reducing emissions, or improving driving experience.

[0091] In this embodiment, by obtaining the first target response signal of the acceleration condition in the initial road spectrum and the second target response signal of the rest of the vehicle conditions, and simultaneously obtaining the analog response signal and the throttle pedal position signal, when the first target response signal is equal to the pedal position response signal, and the second target response signal is equal to the analog response signal, the step of obtaining the vehicle drive spectrum by iterating the target time domain signal in time domain is executed. The target drive signal is obtained from the vehicle drive spectrum, and the acceleration condition test is performed by the target drive signal, which improves the stability of the acceleration condition test and improves the accuracy of the vehicle durability test.

[0092] It should be noted that the above examples are only for understanding the present application and do not constitute a limitation on the accelerated operating condition test method of the present application, and more forms of simple transformation based on this technical concept are within the protection scope of the present application.

[0093] The present application also provides an accelerated operating condition test device, please refer to Figure 4 , the accelerated operating condition test device comprises:

[0094] The signal acquisition module 10 is configured to acquire an initial road spectrum based on the acceleration characteristics of the vehicle to be tested and the collected vehicle load signal and accelerator pedal position signal.

[0095] The signal amplification module 20 is configured to amplify the load frequency in the initial road spectrum to obtain an equivalent load spectrum with increased load frequency, and obtain a target time domain signal of the acceleration operating condition.

[0096] The signal reproduction module 30 is configured to obtain a vehicle driving spectrum by iteratively processing the target time domain signal in the time domain.

[0097] The test driving module 40 is configured to perform an acceleration operating condition test based on the vehicle driving spectrum.

[0098] Optionally, the signal acquisition module 10 is further configured to control a road spectrum acquisition device to collect the vehicle load signal, control a pedal position sensor to synchronously collect the accelerator pedal position signal, acquire an original signal based on the vehicle load signal and the accelerator pedal position signal, and perform clipping, filtering and combination operations on the original signal to obtain the initial road spectrum.

[0099] Optionally, the signal acquisition module 10 is further configured to control a pedal position sensor to synchronously collect a pedal position depth of the vehicle to be tested and a time domain signal corresponding to the acceleration operating condition, and acquire the accelerator pedal position signal based on the pedal position depth and the time domain signal.

[0100] Optionally, the signal amplification module 20 is further configured to multiply the pedal position depth and the time domain signal by a preset proportionality coefficient to obtain an amplified pedal position depth and an amplified time domain signal, and acquire the target time domain signal based on the amplified pedal position depth and the amplified time domain signal.

[0101] Optionally, the signal reproduction module 30 is further configured to acquire a first target response signal of the acceleration operating condition and a second target response signal of the remaining operating conditions of the whole vehicle in the initial road spectrum, acquire an analog response signal and the accelerator pedal position signal, and execute the step of obtaining the vehicle driving spectrum by iteratively processing the target time domain signal in the time domain when the first target response signal is equal to the pedal position response signal and the second target response signal is equal to the analog response signal.

[0102] Optionally, the test driving module 40 is further configured to acquire a target driving signal according to the vehicle driving spectrum; and perform the acceleration test under the acceleration condition by using the target driving signal.

[0103] The acceleration test device provided by the application can solve the technical problem of lacking of simulation of acceleration condition for the structure durability test of chassis and vehicle body structure. Compared with the prior art, the acceleration test device provided by the application has the same beneficial effects as the acceleration test method provided by the above-mentioned embodiments, and other technical features of the acceleration test device are the same as the features disclosed in the above-mentioned embodiments, which will not be repeated here.

[0104] The application provides an acceleration test device, which comprises at least one processor and a memory connected with the at least one processor, wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the acceleration test method in the above-mentioned embodiment one.

[0105] Reference will be made to the following Figure 5 The acceleration test device in the embodiments of the application can include, but is not limited to, mobile terminals such as mobile phones, notebook computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (for example, vehicle-mounted navigation terminals), and the like, and fixed terminals such as digital TVs, desktop computers, and the like. Figure 5 The acceleration test device shown is only an example, and should not bring any limitation to the function and use range of the embodiments of the application.

[0106] As Figure 5As shown, the acceleration condition test device can include a processing device 1001 (e.g., a central processing unit, a graphics processing unit, etc.) that can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 1002 or a program loaded from a storage device 1003 into a random access memory (RAM) 1004. In the RAM 1004, various programs and data required for operation of the device are also stored. The processing device 1001, the ROM 1002, and the RAM 1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Generally, the following systems can be connected to the I / O interface 1006: an input device 1007 including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 1008 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; the storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 can allow the acceleration condition test device to communicate wirelessly or wired with other devices to exchange data. Although the acceleration condition test device with various systems is shown in the figure, it should be understood that all the shown systems are not required to be implemented or possessed. More or less systems can be alternatively implemented or possessed.

[0107] In particular, the processes described above with reference to the flowcharts can be implemented as a computer software program according to embodiments of the present disclosure. For example, embodiments of the present disclosure include a computer program product comprising a computer program carried on a computer readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network through the communication device, or installed from the storage device 1003, or installed from the ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the methods of the embodiments of the present disclosure are performed.

[0108] The acceleration condition test device provided by the present disclosure adopts the acceleration condition test method in the above embodiments, and can solve the technical problem of lacking simulation of acceleration conditions for structural durability test of chassis and body structure. Compared with the prior art, the acceleration condition test device provided by the present disclosure has the same beneficial effects as the acceleration condition test method provided by the above embodiments, and other technical features in the acceleration condition test device are the same as the features disclosed in the previous embodiment method, which will not be repeated here.

[0109] It should be understood that various aspects disclosed herein can be implemented in hardware, software, firmware, or a combination thereof. In the description above various specific details are mentioned that can be implemented in any one or more embodiments or examples.

[0110] The above description is only specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

[0111] The present application provides a computer readable storage medium having stored thereon computer readable program instructions (i.e. computer programs) for performing the accelerated operating condition test method in the above-described embodiments.

[0112] The computer readable storage medium provided by the present application may, for example, be a U disk, but is not limited to an electric, magnetic, optical, electromagnetic, infrared, or semiconductor system, system, or device, or any combination of the above. More specific examples of the computer readable storage medium can include, but are not limited to, an electric connection with one or more conductive wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present embodiment, the computer readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, system, or device. The program code contained on the computer readable storage medium can be transmitted by any suitable medium, including but not limited to an electric wire, an optical cable, an RF (Radio Frequency), etc., or any suitable combination of the above.

[0113] The above computer readable storage medium can be included in the accelerated operating condition test device; or can exist separately without being assembled into the accelerated operating condition test device.

[0114] Computer program code for carrying out operations of the present application can be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code can execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection can be made to an external computer (for example, through the Internet using an Internet Service Provider).

[0115] The flow diagrams and the block diagrams in the drawings are illustrations of architectures, functionalities, and operations of possible implementations of systems, methods, and computer program products according to various embodiments of the present application. In this regard, each block in the flow diagrams or block diagrams can represent a module, a segment, or a portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that in some alternative implementations, the functions noted in the blocks can occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently or the blocks may

[0116] The modules involved in the embodiments of the present application can be implemented by software or by hardware. In some cases, the name of the module does not constitute a limitation on the module itself.

[0117] The readable storage medium provided by the present application is a computer readable storage medium, which stores computer readable program instructions (i.e. computer programs) for executing the above-mentioned accelerated working condition test method, and can solve the technical problem of lacking simulation of accelerated working conditions to test the structural durability of chassis and body structure. Compared with the prior art, the computer readable storage medium provided by the present application has the same beneficial effects as the accelerated working condition test method provided by the above-mentioned embodiments, and will not be described here.

[0118] The above merely illustrates some embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation, direct / indirect application in other related technical fields based on the technical concept of the present application, and contents of the present application specification and drawings are included in the patent protection scope of the present application.

Claims

1. An accelerated operating condition testing method, characterized in that, The accelerated operating condition test method includes: The initial road spectrum is obtained based on the acceleration characteristics of the vehicle under test and the collected vehicle load signal and accelerator pedal position signal. The load frequency in the initial road spectrum is amplified to obtain an equivalent load spectrum with increased load frequency, and the target time domain signal of the acceleration condition is obtained. The vehicle drive spectrum is obtained by iterating the target time-domain signal. Acceleration test was performed using the vehicle's drive spectrum. The step of obtaining the initial road spectrum based on the acceleration characteristics of the vehicle under test and the collected vehicle load signal and accelerator pedal position signal includes: The road spectrum acquisition device is controlled to acquire the vehicle load signal; The control pedal position sensor synchronously acquires the accelerator pedal position signal; The original signal is obtained based on the vehicle load signal and the accelerator pedal position signal; The initial road spectrum is obtained by editing, filtering, and combining the original signal. Prior to the step of obtaining the vehicle drive spectrum by performing time-domain signal iteration on the target time-domain signal, the procedure includes: Acquire the first target response signal of the acceleration condition and the second target response signal of the vehicle under other conditions in the initial road spectrum; Acquire the analog response signal and the accelerator pedal position signal; When the first target response signal is equal to the accelerator pedal position signal and the second target response signal is equal to the analog response signal, the step of obtaining the vehicle drive spectrum by performing time-domain signal iteration on the target time-domain signal is executed.

2. The accelerated operating condition testing method as described in claim 1, characterized in that, The step of synchronously acquiring the accelerator pedal position signal by the control pedal position sensor includes: The control pedal position sensor synchronously acquires the time-domain signals corresponding to the pedal position depth and acceleration conditions of the vehicle under test; The accelerator pedal position signal is obtained based on the pedal position depth and the time domain signal.

3. The accelerated operating condition testing method as described in claim 2, characterized in that, The step of amplifying the load frequency in the initial road spectrum to obtain an equivalent load spectrum with increased load frequency, and obtaining the target time-domain signal of the acceleration condition, includes: The pedal position depth and the time domain signal are multiplied by a preset scaling factor to obtain the magnified pedal position depth and the magnified time domain signal, respectively. The target time domain signal is obtained based on the position and depth of the amplification pedal and the amplified time domain signal.

4. The accelerated operating condition testing method as described in claim 1, characterized in that, The step of performing acceleration condition testing using the vehicle drive spectrum includes: The target driving signal is obtained based on the vehicle driving spectrum; The acceleration test is performed using the target drive signal.

5. An accelerated operating condition testing device, characterized in that, The device includes: The signal acquisition module is used to acquire the initial road spectrum based on the acceleration characteristics of the vehicle under test and the collected vehicle load signal and accelerator pedal position signal; The signal amplification module is used to amplify the load frequency in the initial road spectrum to obtain the equivalent load spectrum with increased load frequency, and to obtain the target time domain signal of the acceleration condition. The signal reproduction module is used to obtain the vehicle drive spectrum by performing time-domain signal iteration on the target time-domain signal; The test drive module is used to perform acceleration condition tests based on the vehicle drive spectrum. The signal acquisition module is also used to control the road spectrum acquisition device to acquire the vehicle load signal; control the pedal position sensor to synchronously acquire the accelerator pedal position signal; acquire the original signal based on the vehicle load signal and the accelerator pedal position signal; and perform editing, filtering and combination operations on the original signal to obtain the initial road spectrum. The signal reproduction module is further configured to acquire the first target response signal of the acceleration condition and the second target response signal of the remaining conditions of the vehicle in the initial road spectrum; acquire the analog response signal and the accelerator pedal position signal; and when the first target response signal is equal to the accelerator pedal position signal and the second target response signal is equal to the analog response signal, execute the step of acquiring the vehicle drive spectrum by performing time-domain signal iteration on the target time-domain signal.

6. An accelerated operating condition testing device, characterized in that, The device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the accelerated operating condition testing method as described in any one of claims 1 to 4.

7. A storage medium, characterized in that, The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, it implements the steps of the accelerated operating condition test method as described in any one of claims 1 to 4.

8. A computer program product, characterized in that, The computer program product includes a computer program that, when executed by a processor, implements the accelerated operating condition testing method as described in any one of claims 1 to 4.

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