Acceleration condition test method, device and equipment, storage medium and computer product

Abstract

The invention relates to the technical field of vehicles, and discloses an acceleration condition test method, device and equipment, a storage medium and a computer product, and the method comprises the steps: obtaining an initial road spectrum based on the acceleration characteristics of a to-be-tested vehicle, and collected vehicle load signals and accelerator pedal position signals; amplifying a load frequency in the initial road spectrum to obtain an equivalent load spectrum with the increased load frequency, and obtaining a target time domain signal of an acceleration working condition; performing time domain signal iteration on the target time domain signal to obtain a vehicle driving spectrum; and carrying out acceleration working condition testing through the vehicle driving spectrum. According to the invention, loading of the acceleration condition is added on the basis of the 24-channel road simulation test bench, so that assessment of the acceleration condition can be realized, the road simulation test is more comprehensive, and the accuracy of the endurance test of the whole vehicle is improved.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to an acceleration condition testing method, device, equipment, storage medium and computer product. Background Art

[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 simulate the worst working conditions of users in the test field after all the parts of the vehicle are installed according to the assembly requirements, including vibration road, torsion road, acceleration road and high-speed road and other reinforced road surfaces.

[0003] Indoor bench durability tests include equal-amplitude loading and road spectrum loading. Equal-amplitude loading is a cyclic loading of equal amplitude on vehicle systems and components. Currently, most component durability tests use this method. Road spectrum loading is based on road load simulation technology to simulate road loads on a bench for single-channel or multi-channel durability tests. Currently, there are mainly twenty-four-channel road simulation tests, which can only achieve load simulation of six degrees of freedom: longitudinal, vertical, longitudinal, braking, steering, and camber. It cannot simulate acceleration conditions for structural durability assessment of chassis and body structures. Acceleration conditions are commonly used conditions in durability road tests, so it is necessary to increase the simulation of vehicle acceleration conditions. Summary of the invention

[0004] The purpose of the present invention is to provide an acceleration condition test method, device, equipment, storage medium and computer product, aiming to solve the technical problem of lack of simulated acceleration conditions for structural durability assessment of chassis and body structures.

[0005] To achieve the above object, the present invention provides an accelerated working condition testing method, the accelerated working condition testing method comprising:

[0006] 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;

[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 an acceleration condition;

[0008] Obtaining a vehicle driving spectrum by performing time domain signal iteration on the target time domain signal;

[0009] An acceleration condition test is performed using the vehicle driving spectrum.

[0010] In one embodiment, the step of acquiring the 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 includes:

[0011] Controlling the road spectrum collection device to collect the vehicle load signal;

[0012] Controlling the pedal position sensor to synchronously collect the accelerator pedal position signal;

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

[0014] The original signal is clipped, filtered and combined to obtain the initial path spectrum.

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

[0016] Controlling the pedal position sensor to synchronously collect the pedal position depth of the vehicle to be tested and the time domain signal corresponding to the acceleration condition;

[0017] The accelerator pedal position signal is acquired according to the pedal position depth and the time domain signal.

[0018] In one embodiment, the step of 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 an acceleration condition includes:

[0019] Multiplying 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;

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

[0021] In one embodiment, before the step of obtaining the vehicle driving spectrum by performing time domain signal iteration on the target time domain signal, the step includes:

[0022] Obtaining a first target response signal of an acceleration condition in the initial road spectrum and a second target response signal of other vehicle conditions;

[0023] Acquiring a simulated 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, the step of acquiring the vehicle driving spectrum by performing time domain signal iteration on the target time domain signal is performed.

[0025] In one embodiment, the step of performing an acceleration condition test using the vehicle driving spectrum includes:

[0026] Acquiring a target driving signal according to the vehicle driving spectrum;

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

[0028] In addition, to achieve the above-mentioned purpose, the present invention also provides an accelerated working condition testing device, the device comprising:

[0029] A signal acquisition module, used 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] A signal amplification module, used 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 an acceleration condition;

[0031] A signal reproduction module, used for obtaining a vehicle driving spectrum by performing time domain signal iteration on the target time domain signal;

[0032] A test drive module is used to perform an acceleration condition test using the vehicle drive spectrum.

[0033] In addition, to achieve the above-mentioned purpose, the present invention also proposes an acceleration condition testing device, which includes: 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 condition testing method as described above.

[0034] In addition, to achieve the above-mentioned purpose, the present invention also proposes a storage medium, which 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, the steps of the acceleration condition test method as described above are implemented.

[0035] In addition, to achieve the above-mentioned purpose, the present invention also proposes a computer program product, which includes a computer program, and when the computer program is executed by a processor, the acceleration condition test method as described above is implemented.

[0036] The present invention proposes an acceleration condition test method, which includes: 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; 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 condition; obtaining a vehicle drive spectrum by performing time domain signal iteration on the target time domain signal; and performing an acceleration condition test through the vehicle drive spectrum. The present invention adds the loading of the acceleration condition on the basis of the twenty-four-channel road simulation test bench, which can realize the assessment of the acceleration condition, make the road simulation test more comprehensive, and improve the accuracy of the vehicle durability test. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0039] Figure 1 A schematic diagram of a process flow provided for the first embodiment of the accelerated working condition testing method of the present invention;

[0040] Figure 2 A schematic diagram of a flow chart of a second embodiment of the accelerated working condition testing method of the present invention;

[0041] Figure 3 A schematic diagram of a process flow provided in Embodiment 3 of the accelerated working condition testing method of the present invention;

[0042] Figure 4 This is a schematic diagram of the module structure of the acceleration condition test device according to an embodiment of the present invention;

[0043] Figure 5 It is a schematic diagram of the structure of the accelerated working condition testing equipment of the hardware operating environment involved in the accelerated working condition testing method in an embodiment of the present invention.

[0044] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments. DETAILED DESCRIPTION

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

[0046] In order to better understand the technical solution of the present invention, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0047] The main solution of the embodiment of the present invention is: based on the acceleration characteristics of the vehicle to be tested and the collected vehicle load signal and accelerator 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 an increased load frequency, and a target time domain signal of the acceleration condition is obtained; by performing time domain signal iteration on the target time domain signal, a vehicle drive spectrum is obtained; and an acceleration condition test is performed using the vehicle drive spectrum.

[0048] Since road spectrum loading is based on road load simulation technology to simulate road loads on a test bench for single-channel or multi-channel durability tests, there are currently mainly 24-channel road simulation tests, which can only achieve load simulation for six degrees of freedom: longitudinal, vertical, longitudinal, braking, steering, and camber. It cannot simulate acceleration conditions for structural durability assessment of chassis and body structures. Acceleration conditions are commonly used conditions for durability road tests, so it is necessary to increase the simulation of vehicle acceleration conditions.

[0049] The present invention increases the loading of acceleration conditions on the basis of the twenty-four-channel road simulation test bench, can realize the assessment of acceleration conditions, make the road simulation test more comprehensive, and improve the accuracy of the vehicle durability test.

[0050] It should be noted that the execution subject of this 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 condition test device capable of realizing the above functions, etc. The following takes the acceleration condition test device as an example to illustrate this embodiment and the following embodiments.

[0051] Based on this, the embodiment of the present invention provides an accelerated working condition test method, referring to Figure 1 , Figure 1 A schematic diagram of a process flow diagram of an embodiment 1 of the accelerated operating condition testing method of the present invention.

[0052] In this embodiment, the acceleration condition test method includes steps S10 to S40:

[0053] Step S10: 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.

[0054] It should be noted that the acceleration characteristics of a vehicle refer to the vehicle's ability to quickly increase its speed, which is an important indicator for evaluating the vehicle's power level. Usually, acceleration performance can be measured by the acceleration time from 0 to 100 km / h. The shorter this time, the better the vehicle's acceleration performance. Acceleration performance not only affects the driving pleasure of the vehicle, but also affects the safety and practicality in actual driving scenarios such as overtaking and climbing.

[0055] It should be understood that the vehicle load signal generally refers to the load changes caused by uneven road surface, vehicle dynamics and other external forces during the driving process. These load signals can include vertical force, lateral force, longitudinal force, bending moment, torque, etc., which are important parameters for evaluating the structural strength, durability and ride comfort of the vehicle. In the definition of vehicle load signals, the six-component force signal is a common concept. It is acquired by a six-component force sensor, and eight signals such as vertical force (Fz), horizontal force (Fx, Fy), bending moment (Mx, My) and torque (Mz) at the wheel center position can be collected at the same time. In addition, the acceleration signal is also part of the vehicle load signal, which can be obtained through an acceleration sensor and used to analyze the vibration characteristics and response behavior of the vehicle. In practical applications, the acquisition and analysis of load signals helps vehicle manufacturers predict potential structural problems in 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's accelerator pedal position signal is generated by the accelerator pedal position sensor, which is usually installed inside the accelerator pedal to monitor the position change of the accelerator pedal. When the driver presses or releases the accelerator 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 engine's power output.

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

[0058] Step S20: 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 an acceleration condition.

[0059] It should be noted that the initial road spectrum is analyzed in detail to identify the distribution characteristics of the load frequency. This includes identifying statistical parameters such as the peak frequency, amplitude, and number of cycles of the load. The equivalent amplification factor is then determined based on design requirements or safety standards. This factor will be used to amplify the load frequencies in the initial road spectrum to simulate more stringent working conditions or expected load growth. The amplification factor is applied to the load frequencies in the initial road spectrum, and the load spectrum is adjusted to reflect the increased equivalent load. This involves recalculating each load level in the load spectrum to ensure that the amplified load spectrum can accurately reflect the increased load effect. Finally, the equivalent load spectrum is Fourier transformed into the target time domain signal of the acceleration condition.

[0060] Step S30: acquiring a vehicle driving spectrum by performing time domain signal iteration on the target time domain signal.

[0061] It should be understood that the target time domain signal needs to be preprocessed, including denoising, smoothing and standardization, to improve the accuracy of subsequent analysis. Then apply an iterative algorithm 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 using the target time domain signal, which is a method of characterizing the energy distribution of the signal in the frequency domain. During the iteration process, techniques such as the Welch method can be used to estimate the power spectrum of the signal. The power spectrum obtained is analyzed to extract the dynamic characteristics of the vehicle such as the natural frequency and damping ratio. This information constitutes the drive spectrum of the vehicle.

[0062] It should be noted that in practical applications, the selection and implementation details of the iterative algorithm will be adjusted according to specific engineering requirements and vehicle characteristics. For example, the Newton 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 real-time performance. In addition, time domain signal analysis can reveal the electromagnetic test rules under transient conditions, propose electromagnetic emission test methods under transient conditions, and improve the accuracy of vehicle EMC performance testing.

[0063] Step S40: performing an acceleration condition test using the vehicle driving spectrum.

[0064] It should be understood that when performing an acceleration test, the tester will drive the vehicle for multiple acceleration tests and record the data of each experiment, including acceleration, driving speed, acceleration time, etc. After the data is recorded, a 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, it is necessary to preset the number of playbacks to play the vehicle driving spectrum for the acceleration test.

[0065] This embodiment proposes an acceleration condition test method, which includes: 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; 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 condition; obtaining a vehicle drive spectrum by performing time domain signal iteration on the target time domain signal; and performing an acceleration condition test through the vehicle drive spectrum. The present invention adds the loading of the acceleration condition on the basis of the twenty-four-channel road simulation test bench, which can realize the assessment of the acceleration condition, make the road simulation test more comprehensive, and improve the accuracy of the vehicle durability test.

[0066] Based on the first embodiment of the present invention, in the second embodiment of the present invention, the same or similar contents as those in the above-mentioned embodiment 1 can be referred to the above introduction, and will not be described in detail later. Figure 2 , Figure 2 The flowchart of the second embodiment of the acceleration condition test method of the present invention is provided. In step S10, the acceleration condition test method further includes:

[0067] Step S101: controlling the road spectrum collection device to collect the vehicle load signal.

[0068] It should be understood that when collecting the vehicle load signal, it is necessary to ensure that all sensors (such as six-component force sensors, accelerometers, strain gauges, etc.) are properly installed on the vehicle and properly connected to the data acquisition system (such as IPETRONIK's system). Perform necessary system calibration, including bridge compensation and signal gain adjustment. Then set the appropriate sampling frequency according to the test requirements. For example, if the acceleration signal is 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, ensure that the data storage and transmission mechanism can handle the expected amount of data. Select representative test paths that should be able to reflect the various load conditions that the vehicle may encounter in actual use. During the test, strictly follow the predetermined speed and route to ensure the consistency and comparability of the load data. During the data acquisition process, monitor the sensor readings and system performance in real time to ensure that there is no data loss or noise interference. Use filtering technology to remove noise from the signal, but be careful not to filter out useful signal components. After the acquisition is completed, the raw data is processed, including data cleaning, synchronization and analysis. Use professional software (such as FlexPro) for data analysis to extract the load spectrum and other relevant engineering parameters.

[0069] Step S102: Controlling the pedal position sensor to synchronously collect the accelerator pedal position signal.

[0070] It should be noted that the displacement signals of the shock absorber and suspension during driving are clipped, filtered, and combined to process the accelerator pedal position signal; at the same time, the pedal position sensor is controlled to synchronously collect the pedal position depth of the vehicle to be tested and the time domain signal corresponding to the acceleration condition, and finally the accelerator pedal position signal is obtained according to the pedal position depth and the time domain signal.

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

[0072] It should be understood that obtaining the original signal based on the vehicle load signal and the accelerator pedal position signal involves the vehicle's sensor data acquisition and signal processing. The vehicle load signal may come from the sensor in the vehicle suspension system, while the accelerator pedal position signal comes from the accelerator pedal position sensor. These signals are usually analog signals and need to be converted into digital signals through a data acquisition system (DAQ) so that they can be processed and analyzed by a computer system.

[0073] Step S104: performing clipping, filtering and combining operations on the original signal to obtain the initial path spectrum.

[0074] It should be noted that in the process of obtaining the initial road spectrum of the vehicle, the editing, filtering and combination of the original signal are key steps, which help improve the quality and accuracy of the data. The editing 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 merge the signals collected by different sensors according to certain rules to construct a complete road spectrum dataset.

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

[0076] Step S201: multiplying 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;

[0077] Step S202: Acquire 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 proportionality coefficients need to be determined first, 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 requirements or design specifications. The pedal position depth is multiplied by the first preset proportionality coefficient 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. The original time domain signal is multiplied by the second preset proportionality coefficient to obtain the amplified time domain signal. This amplification is to enhance certain features in the signal for easy detection or identification. Finally, a target time domain signal is generated based on the amplified pedal position depth and the amplified time domain signal. This signal may be the input of the control algorithm or the object of further analysis.

[0079] In this embodiment, the road spectrum acquisition device is controlled to acquire the vehicle load signal; the pedal position sensor is controlled to synchronously acquire the accelerator pedal position signal; the original signal is acquired according to the vehicle load signal and the accelerator pedal position signal; the original signal is clipped, filtered and combined to acquire the initial road spectrum. At the same time, the pedal position depth and the time domain signal are respectively multiplied by a preset proportional coefficient to acquire the amplified pedal position depth and the amplified time domain signal, and then the target time domain signal is acquired according to the amplified pedal position depth and the amplified time domain signal. This 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 invention, in the third embodiment of the present invention, the same or similar contents as those in the first and second embodiments can be referred to the above description, and will not be described in detail later. Figure 3 , Figure 3 The flowchart of the third embodiment of the acceleration condition test method of the present invention is provided. In step S30, the acceleration condition test method further includes:

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

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

[0083] Step S302: Acquire a simulated response signal and the accelerator pedal position signal.

[0084] It should be noted that in the process of obtaining the analog response signal and the accelerator pedal position signal, a special data acquisition system and sensor are usually required. The analog response signal may include analog outputs of various physical quantities, such as temperature, pressure, flow, etc., while the accelerator pedal position signal is an electrical signal used to monitor the change in the accelerator 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 simulation response signal, the step of acquiring the vehicle driving spectrum by performing time domain signal iteration on the target time domain signal is executed.

[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 simulation response signal, the acceleration condition target time domain signal is reproduced, and the accuracy of the vehicle driving spectrum is ensured.

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

[0088] Step S401: acquiring a target driving signal according to the vehicle driving spectrum;

[0089] Step S402: performing the acceleration condition test using the target driving signal.

[0090] It should be understood that the control algorithm can be used to calculate the target drive signal according to the vehicle's driving spectrum and 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 a desired manner 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 remaining vehicle conditions, the simulation response signal and the accelerator pedal position signal are simultaneously obtained. When the first target response signal is equal to the pedal position response signal and the second target response signal is equal to the simulation response signal, the step of obtaining the vehicle drive spectrum by performing time domain signal iteration on the target time domain signal is performed. The target drive signal is obtained from the vehicle drive spectrum, and the acceleration condition test is performed using the target drive signal, thereby improving the stability of the acceleration condition test and the accuracy of the vehicle durability test.

[0092] It should be noted that the above examples are only used to understand the present invention and do not constitute a limitation on the accelerated operating condition test method of the present invention. More simple transformations based on this technical concept are all within the protection scope of the present invention.

[0093] The present invention also provides an accelerated working condition testing device, please refer to Figure 4 , the acceleration condition test device comprises:

[0094] The signal acquisition module 10 is used 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 used 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 an acceleration condition;

[0096] A signal reproduction module 30, configured to obtain a vehicle driving spectrum by performing time domain signal iteration on the target time domain signal;

[0097] The test driving module 40 is used to perform an acceleration condition test through the vehicle driving spectrum.

[0098] Optionally, the signal acquisition module 10 is also used to control the road spectrum acquisition device to collect the vehicle load signal; control the pedal position sensor to synchronously collect the accelerator pedal position signal; obtain the original signal according to the vehicle load signal and the accelerator pedal position signal; and perform clipping, filtering and combining operations on the original signal to obtain the initial road spectrum.

[0099] Optionally, the signal acquisition module 10 is also used to control the pedal position sensor to synchronously collect the pedal position depth of the vehicle to be tested and the time domain signal corresponding to the acceleration condition; and obtain the accelerator pedal position signal according to the pedal position depth and the time domain signal.

[0100] Optionally, the signal amplification module 20 is further used to multiply the pedal position depth and the time domain signal by preset proportional coefficients to obtain an amplified pedal position depth and an amplified time domain signal; and obtain the target time domain signal according to the amplified pedal position depth and the amplified time domain signal.

[0101] Optionally, the signal reproduction module 30 is also used to obtain a first target response signal for an acceleration condition in the initial road spectrum and a second target response signal for other conditions of the vehicle; obtain a simulation response signal and the accelerator pedal position signal; and when the first target response signal is equal to the pedal position response signal and the second target response signal is equal to the simulation response signal, execute the step of obtaining a vehicle driving spectrum by performing time domain signal iteration on the target time domain signal.

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

[0103] The acceleration condition test device provided by the present invention adopts the acceleration condition test method in the above embodiment, which can solve the technical problem of lack of simulated acceleration condition for structural durability assessment of chassis and body structure. Compared with the prior art, the beneficial effects of the acceleration condition test device provided by the present invention are the same as the beneficial effects of the acceleration condition test method provided by the above embodiment, and other technical features in the acceleration condition test device are the same as the features disclosed in the above embodiment method, which will not be repeated here.

[0104] The present invention provides an acceleration condition testing device, which includes: at least one processor; and a memory connected to the at least one processor in communication; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the acceleration condition testing method in the above-mentioned embodiment one.

[0105] Reference below Figure 5 , which shows a schematic diagram of the structure of an acceleration condition test device suitable for implementing an embodiment of the present invention. The acceleration condition test device in the embodiment of the present invention may include, but is not limited to, mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 5 The acceleration test equipment shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present invention.

[0106] like Figure 5As shown, the acceleration test equipment may include a processing device 1001 (e.g., a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. In RAM1004, various programs and data required for the operation of the device are also stored. The processing device 1001, ROM1002, and RAM1004 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 touchpad, 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: Liquid Crystal Display), a speaker, a vibrator, etc.; a 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 test device to communicate with other devices wirelessly or by wire to exchange data. Although the figure shows an acceleration test device with various systems, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems can be implemented or have alternatively.

[0107] In particular, according to the embodiments disclosed in the present invention, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present invention include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program contains program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through a 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 method of the embodiment disclosed in the present invention are executed.

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

[0109] It should be understood that the various parts disclosed in the present invention can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0110] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

[0111] The present invention provides a computer-readable storage medium having computer-readable program instructions (ie, computer programs) stored thereon, wherein the computer-readable program instructions are used to execute the acceleration condition test method in the above-mentioned embodiment.

[0112] The computer-readable storage medium provided by the present invention may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more 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 thereof. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that may be used by or in combination with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

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

[0114] Computer program code for performing the operations of the present invention may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may 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 may be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0115] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present invention. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs the specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0116] The modules involved in the embodiments of the present invention may be implemented by software or hardware, wherein the name of the module does not limit the unit itself in some cases.

[0117] The readable storage medium provided by the present invention is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned acceleration condition test method, and can solve the technical problem of lack of simulated acceleration conditions for structural durability assessment of chassis and body structures. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided by the present invention are the same as the beneficial effects of the acceleration condition test method provided by the above-mentioned embodiment, and will not be elaborated here.

[0118] The above descriptions are only some embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. An accelerated working condition test method, characterized in that: The accelerated condition test method comprises: 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; 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 an acceleration condition; Obtaining a vehicle driving spectrum by performing time domain signal iteration on the target time domain signal; An acceleration condition test is performed using the vehicle driving spectrum.

2. The accelerated operating condition testing method according to claim 1, characterized in that: The step of acquiring the 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 includes: Controlling the road spectrum collection device to collect the vehicle load signal; Controlling the pedal position sensor to synchronously collect the accelerator pedal position signal; Acquire an original signal according to the vehicle load signal and the accelerator pedal position signal; The original signal is clipped, filtered and combined to obtain the initial path spectrum.

3. The accelerated condition testing method according to claim 2, characterized in that: The step of controlling the pedal position sensor to synchronously collect the accelerator pedal position signal comprises: Controlling the pedal position sensor to synchronously collect the pedal position depth of the vehicle to be tested and the time domain signal corresponding to the acceleration condition; The accelerator pedal position signal is acquired according to the pedal position depth and the time domain signal.

4. The accelerated condition testing method according to claim 3, 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 a target time domain signal of an acceleration condition comprises: Multiplying 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; The target time domain signal is acquired according to the amplified pedal position depth and the amplified time domain signal.

5. The accelerated condition testing method according to claim 1, characterized in that: Before the step of obtaining the vehicle driving spectrum by performing time domain signal iteration on the target time domain signal, the method includes: Obtaining a first target response signal of an acceleration condition in the initial road spectrum and a second target response signal of other vehicle conditions; Acquiring a simulated response signal and the accelerator 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 acquiring the vehicle driving spectrum by performing time domain signal iteration on the target time domain signal is performed.

6. The accelerated condition testing method according to claim 1, characterized in that: The step of performing an acceleration condition test using the vehicle driving spectrum comprises: Acquiring a target driving signal according to the vehicle driving spectrum; The acceleration condition test is performed using the target driving signal.

7. An accelerated working condition test device, characterized in that: The device comprises: A signal acquisition module, used 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; A signal amplification module, used 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 an acceleration condition; A signal reproduction module, used for obtaining a vehicle driving spectrum by performing time domain signal iteration on the target time domain signal; A test drive module is used to perform an acceleration condition test using the vehicle drive spectrum.

8. An accelerated working condition test device, characterized in that: The device comprises: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the acceleration condition test method according to any one of claims 1 to 6.

9. 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, the steps of the acceleration condition test method according to any one of claims 1 to 6 are implemented.

10. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the acceleration condition testing method according to any one of claims 1 to 6 is implemented.

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