CN114218663A

CN114218663A - Differential fatigue endurance rack spectrum compiling method, system, terminal and storage medium

Info

Publication number: CN114218663A
Application number: CN202111281736.7A
Authority: CN
Inventors: 薄昊; 张元勤; 申春宝; 刘占国; 董立甲; 李响
Original assignee: FAW Group Corp
Current assignee: FAW Group Corp
Priority date: 2021-11-01
Filing date: 2021-11-01
Publication date: 2022-03-22

Abstract

The invention discloses a method, a system, a terminal and a storage medium for compiling a fatigue endurance rack spectrum of a differential, belonging to the technical field of engineering vehicles and respectively acquiring torque data and rotating speed data of a driving shaft; obtaining the corresponding relation between the torque and the number of revolutions in different intervals according to the torque data and the revolution speed data of the driving shaft; calculating damage values of the same torque of different test routes by adopting a fatigue accumulated damage theory according to the corresponding relation between the torque of different intervals and the number of rotating circles; acquiring road surface driving proportions of different users, and obtaining a pseudo-damage value of the users with the equivalent weight of 24 kilometres and 99 percent through the road surface driving proportions of the different users and damage values with the same torque of different test routes; and obtaining a fatigue endurance rack spectrum of the differential by adopting a damage equivalence principle according to a pseudo damage value of 99% users equivalent to 24 kilometres. This patent comes from real user and uses the road, and it is comprehensive to cover the road type, and load input intensity is more accurate, appears being far higher than user's actual load in avoiding emulation or the bench to verify, causes the design too strong or failure mode to change.

Description

Differential fatigue endurance rack spectrum compiling method, system, terminal and storage medium

Technical Field

The invention discloses a method, a system, a terminal and a storage medium for compiling a fatigue endurance rack spectrum of a differential, and belongs to the technical field of engineering vehicles.

Background

The automobile differential mechanism can enable the left driving wheel and the right driving wheel to rotate at different rotating speeds. Mainly comprises a left half shaft gear, a right half shaft gear, two planet gears and a gear carrier. The function is that when the automobile turns or runs on an uneven road surface, the left wheel and the right wheel roll at different rotating speeds, namely, the pure rolling motion of the driving wheels at two sides is ensured. Can verify its fatigue durability through bench test and whole car experiment, wherein the bench test goes on before the whole car is verified, and the bench test passes through the back, carries out whole car again and tests, and the accuracy degree that the bench was verified depends on loaded load spectrum, and load spectrum undersize can not reach the verification purpose in earlier stage, and load spectrum is too big, causes the over-design, is unfavorable for the lightweight. It is therefore necessary to compile a rack load spectrum based on the measured road load.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a differential fatigue endurance bench spectrum compilation method, a differential fatigue endurance bench spectrum compilation system, a differential fatigue endurance bench spectrum compilation terminal and a storage medium, and the laboratory load spectrum compilation is realized by processing a load signal, counting a rotating member and combining a pseudo-damage equivalence principle.

The technical scheme of the invention is as follows:

according to a first aspect of embodiments of the present invention, there is provided a method of profiling a differential fatigue endurance stage, the method comprising:

respectively acquiring driving shaft torque data and rotating speed data;

obtaining the corresponding relation between the torque and the number of revolutions in different intervals according to the torque data and the revolution speed data of the driving shaft;

calculating damage values of the same torque of different test routes by adopting a fatigue accumulated damage theory according to the corresponding relation between the torque of different intervals and the number of rotating circles;

acquiring road surface driving proportions of different users, and obtaining a pseudo-damage value of the users with the equivalent weight of 24 kilometres and 99 percent through the road surface driving proportions of the different users and damage values with the same torque of different test routes;

and obtaining a fatigue endurance rack spectrum of the differential by adopting a damage equivalence principle according to a pseudo damage value of 99% users equivalent to 24 kilometres.

Preferably, the separately acquiring the drive shaft torque data and the rotational speed data includes:

building a test system, and testing a public road surface simulation user by the built test system; respectively acquiring driving shaft torque data and rotating speed data through the test system;

preferably, the test system comprises a slip ring torque sensor and a strain gauge which are arranged on the driving shaft and data acquisition equipment which is arranged on the test vehicle, and the slip ring torque sensor is electrically connected with the data acquisition equipment and the strain gauge respectively.

Preferably, the obtaining the correspondence between the torques in different sections and the number of rotations through the torque data and the rotational speed data of the driving shaft includes:

performing data processing on the driving shaft torque data and the rotating speed data to obtain filtered driving shaft torque data and filtered rotating speed data;

the filtered torque data of the driving shaft and the filtered rotating speed data are subjected to equation (1) to obtain the corresponding relation between the torque and the number of rotating turns in different intervals:

wherein, i is 1 and 2 … …, m is the number of torque intervals, n_iFor number of revolutions, Δ t, corresponding to torque in different intervals_iAre time units.

Preferably, the obtaining of the damage values of the same torque in different test routes by calculating the corresponding relationship between the torque in different intervals and the number of rotation turns by using a fatigue accumulated damage theory includes:

calculating by adopting a fatigue accumulated damage theory according to the corresponding relation between the torque and the number of rotation turns in different intervals to obtain the number of rotation turns of 24 kilometres with the same torque equivalent in different test routes;

and obtaining the damage values of the same torque of different test routes through the equivalent torque of the same torque of the different test routes by 24 kilometres of rotation.

Preferably, the obtaining of the equivalent 24 kilometres 99% user pseudo-damage value through the damage values of the different user road surface driving proportions and the same torque of the different test routes includes:

obtaining a pseudo damage value of 24 kilometers per equivalent of each user through the road surface driving proportions of different users and the damage values of different test routes with the same torque;

and obtaining the equivalent 24 kilometres 99% user pseudo-damage value through the equivalent 24 kilometres pseudo-damage value of each user.

Preferably, the obtaining of the fatigue endurance rack spectrum of the differential by using the damage equivalence principle through the pseudo damage value of 99% users equivalent to 24 kilometres comprises:

and mixing the durability test of the differential into the durability test of the shaft teeth of the gearbox, splitting the pseudo damage value of 99 percent of users with the equivalent of 24 kilometres into each gear, and obtaining the fatigue durability rack spectrum of the differential.

According to a second aspect of an embodiment of the present invention, there is provided a differential fatigue endurance rack mapping system, comprising:

the acquisition module is used for respectively acquiring torque data and rotating speed data of the driving shaft;

the calculation module is used for obtaining the corresponding relation between the torque and the number of turns of rotation in different intervals through the torque data and the rotating speed data of the driving shaft;

the statistical module is used for calculating damage values of the same torque of different test routes by adopting a fatigue accumulation damage theory according to the corresponding relation between the torque and the number of rotation turns in different intervals;

the calculation module is used for acquiring the road surface driving proportions of different users, and obtaining a user pseudo-damage value of 24 kilometres and 99 percent equivalent through the road surface driving proportions of the different users and damage values of the same torque of different test routes;

and the compiling module is used for obtaining a fatigue endurance rack spectrum of the differential by adopting a damage equivalence principle through a pseudo damage value of 99% users equivalent to 24 kilometres.

According to a third aspect of the embodiments of the present invention, there is provided a terminal, including:

one or more processors;

a memory for storing the one or more processor-executable instructions;

wherein the one or more processors are configured to:

the method of the first aspect of the embodiments of the present invention is performed.

According to a fourth aspect of embodiments of the present invention, there is provided a non-transitory computer-readable storage medium, wherein instructions, when executed by a processor of a terminal, enable the terminal to perform the method of the first aspect of embodiments of the present invention.

According to a fifth aspect of embodiments of the present invention, there is provided an application program product, which, when running on a terminal, causes the terminal to perform the method of the first aspect of embodiments of the present invention.

The invention has the beneficial effects that:

this patent provides a quick-witted fatigue endurance rack table of differential mechanism register for easy reference establishment method, system, terminal and storage medium, compares with prior art, has following advantage:

(1) in the early stage of the whole vehicle transmission endurance test, a strain gauge and a torque sensor are mounted on a driving shaft to obtain the real load spectrum of a real vehicle on a social road, and load spectrum compilation in a laboratory is realized by processing load signals, a rotating member counting method and combining a pseudo-damage equivalence principle;

(2) the differential fatigue endurance bench spectrum compiled by the method can be used for the endurance performance verification of the bench in a laboratory in the early stage of differential development and can also be used for load input conditions of endurance simulation calculation;

(3) the invention comes from a real road used by a user, has comprehensive road covering types and more accurate load input strength, and avoids the phenomenon that the actual load of the user is far higher in simulation or bench verification to cause over-strong design or change of failure modes.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a flow chart illustrating a differential fatigue endurance bench mapping method according to an exemplary embodiment;

FIG. 2 is a flow chart illustrating a differential fatigue endurance bench mapping method according to an exemplary embodiment;

FIG. 3 is a schematic diagram illustrating an actual tool for a slip ring torque sensor and strain gauge mounting in a method for compiling a fatigue endurance stand spectrum of a differential according to an exemplary embodiment;

FIG. 4 is a frequency histogram of statistical user pseudo-damage values in a differential fatigue endurance gantry profiling method, according to an exemplary embodiment;

FIG. 5 is a graph illustrating a statistical user cumulative probability of false damage values for a differential fatigue endurance bench mapping method, according to an exemplary embodiment;

FIG. 6 is a block diagram illustrating a structural schematic of a differential fatigue endurance bench profiling system, according to an exemplary embodiment;

fig. 7 is a schematic block diagram of a terminal structure shown in accordance with an example embodiment.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The embodiment of the invention provides a method for compiling a fatigue endurance bench spectrum of a differential, which is realized by a terminal, wherein the terminal can be a smart phone, a desktop computer or a notebook computer and the like, and the terminal at least comprises a CPU (Central processing Unit), a voice acquisition device and the like.

Example one

FIG. 1 is a flow chart illustrating a differential fatigue endurance bench profiling method for use in a terminal, according to an exemplary embodiment, comprising the steps of:

step 101, respectively acquiring torque data and rotating speed data of a driving shaft;

102, obtaining corresponding relations between torques and rotation turns in different intervals according to the torque data and the rotation speed data of the driving shaft;

103, calculating by adopting a fatigue accumulation damage theory through the corresponding relation between the torque and the number of rotation turns in different intervals to obtain damage values of the same torque in different test routes;

104, acquiring road surface driving proportions of different users, and obtaining a pseudo-damage value of the users with the equivalent weight of 24 kilometres and 99 percent through the road surface driving proportions of the different users and damage values with the same torque of different test routes;

and 105, obtaining a fatigue endurance rack spectrum of the differential by using a damage equivalence principle according to a pseudo damage value of 99% users equivalent to 24 kilometres.

wherein, i is 1, 2 … …, m isNumber of torque intervals, n_iFor number of revolutions, Δ t, corresponding to torque in different intervals_iAre time units.

Example two

FIG. 2 is a flow chart illustrating a differential fatigue endurance bench profiling method for use in a terminal, according to an exemplary embodiment, comprising the steps of:

step 201, building a test system, and testing a public road surface simulation user by the built test system;

according to the direct size and the installation position of the installation hole of the slip ring torque sensor, the diameter of the driving shaft close to the wheel end is reduced, the driving shaft and the installation hole of the slip ring torque sensor form clearance fit, a middle gap is fixed by using two-in-one adhesive, and a rotor of the slip ring torque sensor and the driving shaft form a whole and rotate together.

And mounting the strain gauge on the unchanged part of the driving shaft, selecting a full-bridge type strain gauge as the strain gauge, polishing the surface of a mounting position to be smooth, and sticking the strain gauge by using special CN glue to ensure firm sticking. Four leads of the strain gauge are soldered to the connection terminals, and four points of the connection terminals are connected to four signal input points of the rotor of the slip ring torque sensor through wires, as shown in fig. 3, ensuring that the connection terminals and the connection wires are insulated from the drive shaft. After the driving torque is input to the driving shaft, the driving shaft can be twisted, the strain gauge can generate a deformation quantity, and then a corresponding resistance value change is generated, so that a corresponding voltage signal change is caused.

And on a torque test bed, completing the calibration of the relation between the strain signal and the torque. The torque test bench outputs different torques to a driving shaft, the strain quantity of the strain gauge is collected, the relation between the strain and the torque is obtained by measuring different torque values, and T-ku is formed, wherein T is a torque value, u is a voltage value corresponding to the strain, and k is a calibration coefficient. Specific examples calibration data are shown in table 1, giving k 679.35N · m/v.

TABLE 1 Torque and Strain gauge Voltage calibration data record

Serial number	Torque (N.m)	Voltage (v)
			1	301	0.44358
2	635	0.93164
			3	931	1.3656
4	1250	1.8244
			5	1520	2.2201
6	1841	2.6977
			7	1453	2.1382
8	1077	1.6004
			9	863	1.287
10	547	0.82322
			11	246	0.38344
12	1.5	0.021948
			13	-316	-0.44924
14	-642	-0.93519
			15	-930	-1.3624
16	-1235	-1.8115
			17	-1550	-2.279
18	-1842	-2.7221
			19	-1482	-2.1925
20	-1177	-1.7408
			21	-764	-1.1335
22	-544	-0.80879
			23	-182	-0.26886
24	2.5	0.007328

Starting from vehicle model sales area, traffic condition and road surface characteristic dimensionality, areas such as Changchun, Chongqing, Hainan and Shenzhen are selected as test areas, and inter-area expressways, intra-area trunk roads, elevated roads, inter-residential district roads, urban peripheral country roads, mountain roads and the like are selected as test routes, and stations, airports, schools, markets and hospitals are set as route points as shown in table 2. The vehicle driving is carried out by adopting two driving styles of softness and fierce driving.

Table 2 test route example

Step 202, respectively acquiring driving shaft torque data and rotating speed data through the testing system.

And connecting a signal wire harness of the torque slip ring sensor to the data acquisition equipment, and inputting a calibration coefficient k in the data acquisition channel setting to enable the data acquisition equipment to directly present a driving shaft torque signal. The rotating speed signal is obtained through a special module of the data acquisition equipment. The data acquisition equipment can continuously work for more than 6 hours, the data storage memory is at least 64G, the data volume is large, the data needs to be copied from the data acquisition equipment to a local computer at regular intervals, the data acquisition equipment needs to be firmly fixed, and the surrounding heat dissipation space is enough.

And 203, performing data processing on the driving shaft torque data and the rotating speed data to obtain filtered driving shaft torque data and filtered rotating speed data.

Checking the maximum and minimum values of the signal, judging whether there is abnormal outlier, and calculating the peak factor by statistical analysis

Wherein | X_iI is the test amplitude, RMS (L) is the root mean square value of the data within the length of the data analysis. After the abnormal value is eliminated, in order to prevent high-frequency signal interference, a Butterworth filter is adopted for low-pass filtering processing, and the cut-off frequency is selected to be 20Hz, so that the filtered driving shaft torque data and the filtered rotating speed data are obtained.

And step 204, obtaining the corresponding relation between the torques in different intervals and the number of rotation turns through the filtered torque data of the driving shaft and the filtered rotation speed data.

And counting the torque and the number of rotation turns by adopting a rotating member counting method. Obtaining the corresponding relation between the torque and the number of turns of rotation in different intervals by the filtered torque data and the filtered rotation speed data of the driving shaft through a formula (1):

When the wheel speeds of the left end and the right end are different, the planet gear in the differential mechanism can rotate, the torque of an input shaft of the differential mechanism is equal to (the torque of a left rear driving shaft + the torque of a right rear driving shaft)/the reduction ratio, the speed difference of the side gear is equal to the rotating speed of the left rear driving wheel-the rotating speed of the right rear driving wheel, and when the rotating number of the rotating number corresponding to the different torque of the input shaft of the differential mechanism in a certain test route is calculated, the speed difference of the side gear is calculated by an absolute value.

And step 205, calculating by using a fatigue accumulation damage theory through the corresponding relation between the torque and the number of rotation turns in different intervals to obtain damage values of the same torque in different test routes.

Firstly, calculating by adopting a fatigue accumulation damage theory through the corresponding relation between the torque and the number of rotation turns in different intervals to obtain the number of rotation turns of 24 kilometres with the same torque equivalent in different test routes;

different road surface damage values are obtained by combining the fatigue accumulated damage theory, for example: the system comprises an expressway, an urban road, a rural road, a mountain road, a limit condition and the like, wherein the limit condition refers to that a left driving wheel and a right driving wheel sink into puddles on pavements with different attachment coefficients or one wheel of the left driving wheel and the right driving wheel. Through the calculation method in step 204, the corresponding relationship between the torque and the number of rotations of the test data of different routes is obtained. And (3) calculating the fatigue accumulated damage value of the test data by applying Miner criterion as shown in the formula (2) and the formula (3), and predicting that the failure occurs when the accumulated damage is more than or equal to 1.

In the formula, D_i-relative damage value

n_iActual number of cycles

N_i，fNumber of cycles to failure

Given a torque T, applying the principle of pseudo-damage equivalence based on the Wohler curve₁Corresponding to a number of cycles of N₁Given torque T₂Corresponding to a number of cycles of N₂They correspond to equal damage values, k being the damage index associated with the material, as shown in equation 4.

Suppose that at input torque T₁Rotation n₁The pseudo damage caused by the ring working condition is marked as C₁Then at the input torque T₂Under conditions to produce a product of general formula (II) and (III)₁Equal pseudo-damage value, then n number of revolutions is required₂＝n₁(T₁/T₂)^k. According to the method, differential damage values of different routes are equivalent to corresponding rotation turns under the same torque, damage strength of different routes is compared, the calculation method is shown in the formula (5), and the calculation result is shown in the table 3.

Wherein, T_nomFor a selected reference torque value, n_nomIs T_nomCorresponding number of revolutions, | T_iThe actual resulting torque.

TABLE 3 differential at Torque T for different routes_nomEquivalent number of rotations

Then, the damage values of the same torque of different test routes are obtained through the equations (2) and (3) through the equivalent 24 kilo-kilometer rotation turns of the same torque of different test routes. N obtained due to different road surfaces_nomTherefore, the larger the number of rotations, the larger the damage value.

And step 206, acquiring the road surface driving proportions of different users, and obtaining the equivalent 24 kilometres 99% user pseudo-damage value through the road surface driving proportions of the different users and the damage values of the different test routes with the same torque.

Firstly, obtaining a pseudo damage value of 24 kilometers per equivalent of each user through the road surface driving proportion of different users and the damage values of the same torque of different test routes, wherein the specific contents are as follows:

the road surface running proportions of different users are obtained by adopting a user survey mode, the invention carries out running surface statistics by installing data acquisition equipment on a user vehicle, the number of survey users is 80, and the road surface running proportions of different users are shown in table 4.

Calculating an equivalent damage value of 24 kilometers per user, for example:

and m is the number of urban road test routes, and the calculation methods of other pavements are consistent.

TABLE 4 road running proportion of different users

User' s	City	Country road	Mountain road	Gao Su	Limit condition of
						User1	60％	20％	10％	9.5％	0.5％
User2	30％	20％	20％	28％	2％
						User3	35％	15％	20％	29％	1％
…	…	…	…	…	…
						User80	10％	20％	35％	30％	5％

Then, the distribution of the user damage values is counted, the pseudo damage values of 99% of users are selected as the equivalent damage intensity input of the rack spectrum, as shown in fig. 4-5, a cumulative probability distribution diagram of the pseudo damage values of the counted users is obtained by counting the frequency histogram of the pseudo damage values of the users, and accordingly, the pseudo damage values of 24 kilometres and 99% of users are obtained through the pseudo damage values of 24 kilometres per equivalent of each user.

And step 207, obtaining a fatigue endurance rack spectrum of the differential by using a damage equivalence principle according to a pseudo damage value of 99% users equivalent to 24 kilometres.

The load spectrum of the fatigue endurance rack of the differential is compiled based on a damage equivalence principle, the durability test of the differential is mixed into the durability test of the shaft teeth of the gearbox, the pseudo-damage value of 99 percent of users with equivalent weight of 24 kilometres is split into each gear, the turning working condition of a real user is simulated by adjusting the rotating speed difference of a left driving shaft and a right driving shaft, the durability examination of the half shaft gear and the planetary gear is covered, the comprehensive examination of the durability of the differential is realized, and the generated fatigue endurance rack spectrum of the differential is shown in a table 5.

TABLE 5 differential at Torque T for different routes_nomEquivalent number of rotations

In the early stage of a whole vehicle transmission endurance test, a strain gauge and a torque sensor are mounted on a driving shaft to obtain a real load spectrum of a real vehicle on a social road, and load spectrum compilation in a laboratory is realized by processing a load signal, a rotating member counting method and combining a pseudo-damage equivalence principle; the compiled fatigue endurance bench spectrum of the differential can be used for the endurance performance verification of the bench in a laboratory at the early stage of differential development and can also be used for load input conditions of endurance simulation calculation; the road is used by a real user, the type of the covered road is comprehensive, the load input intensity is more accurate, and the phenomenon that the design is too strong or the failure mode is changed due to the fact that the actual load is far higher than the user load in simulation or bench verification is avoided.

EXAMPLE III

In an exemplary embodiment, there is also provided a differential fatigue endurance gantry profiling system, as shown in fig. 6, comprising:

an obtaining module 310 for obtaining drive shaft torque data and rotational speed data, respectively;

the calculating module 320 is used for obtaining the corresponding relation between the torques and the number of turns of rotation in different intervals according to the torque data and the rotating speed data of the driving shaft;

the statistical module 330 is configured to calculate, by using a fatigue accumulated damage theory, damage values of the same torque in different test routes according to the corresponding relationship between the torque in different intervals and the number of revolutions;

the calculation module 340 is configured to obtain road surface driving proportions of different users, and obtain equivalent user pseudo-damage values of 24 kilometers and 99% of users according to the road surface driving proportions of the different users and damage values of different test routes with the same torque;

and the compiling module 350 is used for obtaining a fatigue endurance rack spectrum of the differential by adopting a damage equivalence principle according to a pseudo damage value of 99% users equivalent to 24 kilometres.

In the invention, at the early stage of a whole vehicle transmission endurance test, a strain gauge and a torque sensor are arranged on a driving shaft to obtain the real load spectrum of a real vehicle on a social road, and load spectrum compilation in a laboratory is realized by processing a load signal, a rotating member counting method and combining a pseudo-damage equivalence principle; the compiled fatigue endurance bench spectrum of the differential can be used for the endurance performance verification of the bench in a laboratory at the early stage of differential development and can also be used for load input conditions of endurance simulation calculation; the road is used by a real user, the type of the covered road is comprehensive, the load input intensity is more accurate, and the phenomenon that the design is too strong or the failure mode is changed due to the fact that the actual load is far higher than the user load in simulation or bench verification is avoided.

Example four

Fig. 7 is a block diagram of a terminal according to an embodiment of the present application, where the terminal may be the terminal in the foregoing embodiment. The terminal 400 may be a portable mobile terminal such as: smart phones, tablet computers. The terminal 400 may also be referred to by other names such as user equipment, portable terminal, etc.

Generally, the terminal 400 includes: a processor 401 and a memory 402.

Processor 401 may include one or more processing cores, such as a 4-core processor, an 8-core processor, or the like. The processor 401 may be implemented in at least one hardware form of a DSP (Digital Signal Processing), an FPGA (Field-Programmable Gate Array), and a PLA (Programmable Logic Array). The processor 401 may also include a main processor and a coprocessor, where the main processor is a processor for Processing data in an awake state, and is also called a Central Processing Unit (CPU); a coprocessor is a low power processor for processing data in a standby state. In some embodiments, the processor 401 may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content required to be displayed by the display screen. In some embodiments, the processor 401 may further include an AI (Artificial Intelligence) processor for processing computing operations related to machine learning.

Memory 402 may include one or more computer-readable storage media, which may be tangible and non-transitory. Memory 402 may also include high speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In some embodiments, a non-transitory computer readable storage medium in memory 402 is used to store at least one instruction for execution by processor 401 to implement a differential fatigue endurance gantry profiling method provided herein.

In some embodiments, the terminal 400 may further optionally include: a peripheral interface 403 and at least one peripheral. Specifically, the peripheral device includes: at least one of radio frequency circuitry 404, touch screen display 405, camera 406, audio circuitry 407, positioning components 408, and power supply 409.

The peripheral interface 403 may be used to connect at least one peripheral related to I/O (Input/Output) to the processor 401 and the memory 402. In some embodiments, processor 401, memory 402, and peripheral interface 403 are integrated on the same chip or circuit board; in some other embodiments, any one or two of the processor 401, the memory 402 and the peripheral interface 403 may be implemented on a separate chip or circuit board, which is not limited by this embodiment.

The Radio Frequency circuit 404 is used for receiving and transmitting RF (Radio Frequency) signals, also called electromagnetic signals. The radio frequency circuitry 404 communicates with communication networks and other communication devices via electromagnetic signals. The rf circuit 404 converts an electrical signal into an electromagnetic signal to transmit, or converts a received electromagnetic signal into an electrical signal. Optionally, the radio frequency circuit 404 includes: an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a subscriber identity module card, and so forth. The radio frequency circuitry 404 may communicate with other terminals via at least one wireless communication protocol. The wireless communication protocols include, but are not limited to: the world wide web, metropolitan area networks, intranets, generations of mobile communication networks (2G, 3G, 4G, and 5G), Wireless local area networks, and/or WiFi (Wireless Fidelity) networks. In some embodiments, the rf circuit 404 may further include NFC (Near Field Communication) related circuits, which are not limited in this application.

The touch display screen 405 is used to display a UI (User Interface). The UI may include graphics, text, icons, video, and any combination thereof. The touch display screen 405 also has the ability to capture touch signals on or over the surface of the touch display screen 405. The touch signal may be input to the processor 401 as a control signal for processing. The touch screen display 405 is used to provide virtual buttons and/or a virtual keyboard, also referred to as soft buttons and/or a soft keyboard. In some embodiments, the touch display screen 405 may be one, providing the front panel of the terminal 400; in other embodiments, the touch screen display 405 may be at least two, respectively disposed on different surfaces of the terminal 400 or in a folded design; in still other embodiments, the touch display 405 may be a flexible display disposed on a curved surface or on a folded surface of the terminal 400. Even more, the touch screen display 405 can be arranged in a non-rectangular irregular pattern, i.e., a shaped screen. The touch screen 405 may be made of LCD (Liquid Crystal Display), OLED (Organic Light-Emitting Diode), and other materials.

The camera assembly 406 is used to capture images or video. Optionally, camera assembly 406 includes a front camera and a rear camera. Generally, a front camera is used for realizing video call or self-shooting, and a rear camera is used for realizing shooting of pictures or videos. In some embodiments, the number of the rear cameras is at least two, and each of the rear cameras is any one of a main camera, a depth-of-field camera and a wide-angle camera, so that the main camera and the depth-of-field camera are fused to realize a background blurring function, and the main camera and the wide-angle camera are fused to realize a panoramic shooting function and a VR (Virtual Reality) shooting function. In some embodiments, camera assembly 406 may also include a flash. The flash lamp can be a monochrome temperature flash lamp or a bicolor temperature flash lamp. The double-color-temperature flash lamp is a combination of a warm-light flash lamp and a cold-light flash lamp, and can be used for light compensation at different color temperatures.

The audio circuit 407 is used to provide an audio interface between the user and the terminal 400. The audio circuit 407 may include a microphone and a speaker. The microphone is used for collecting sound waves of a user and the environment, converting the sound waves into electric signals, and inputting the electric signals to the processor 401 for processing, or inputting the electric signals to the radio frequency circuit 404 for realizing voice communication. For the purpose of stereo sound collection or noise reduction, a plurality of microphones may be provided at different portions of the terminal 400. The microphone may also be an array microphone or an omni-directional pick-up microphone. The speaker is used to convert electrical signals from the processor 401 or the radio frequency circuit 404 into sound waves. The loudspeaker can be a traditional film loudspeaker or a piezoelectric ceramic loudspeaker. When the speaker is a piezoelectric ceramic speaker, the speaker can be used for purposes such as converting an electric signal into a sound wave audible to a human being, or converting an electric signal into a sound wave inaudible to a human being to measure a distance. In some embodiments, audio circuitry 407 may also include a headphone jack.

The positioning component 408 is used to locate the current geographic position of the terminal 400 for navigation or LBS (Location Based Service). The Positioning component 408 can be a Positioning component based on the Global Positioning System (GPS) in the united states, the beidou System in china, or the galileo System in russia.

The power supply 409 is used to supply power to the various components in the terminal 400. The power source 409 may be alternating current, direct current, disposable or rechargeable. When the power source 409 includes a rechargeable battery, the rechargeable battery may be a wired rechargeable battery or a wireless rechargeable battery. The wired rechargeable battery is a battery charged through a wired line, and the wireless rechargeable battery is a battery charged through a wireless coil. The rechargeable battery may also be used to support fast charge technology.

In some embodiments, the terminal 400 also includes one or more sensors 410. The one or more sensors 410 include, but are not limited to: acceleration sensor 411, gyro sensor 412, pressure sensor 413, fingerprint sensor 414, optical sensor 415, and proximity sensor 416.

The acceleration sensor 411 may detect the magnitude of acceleration in three coordinate axes of the coordinate system established with the terminal 400. For example, the acceleration sensor 411 may be used to detect components of the gravitational acceleration in three coordinate axes. The processor 401 may control the touch display screen 405 to display the user interface in a landscape view or a portrait view according to the gravitational acceleration signal collected by the acceleration sensor 411. The acceleration sensor 411 may also be used for acquisition of motion data of a game or a user.

The gyro sensor 412 may detect a body direction and a rotation angle of the terminal 400, and the gyro sensor 412 may cooperate with the acceleration sensor 411 to acquire a 3D (3 dimensional) motion of the user with respect to the terminal 400. From the data collected by the gyro sensor 412, the processor 401 may implement the following functions: motion sensing (such as changing the UI according to a user's tilting operation), image stabilization at the time of photographing, game control, and inertial navigation.

The pressure sensor 413 may be disposed on a side bezel of the terminal 400 and/or a lower layer of the touch display screen 405. When the pressure sensor 413 is disposed at a side frame of the terminal 400, a user's grip signal to the terminal 400 can be detected, and left-right hand recognition or shortcut operation can be performed according to the grip signal. When the pressure sensor 413 is disposed at the lower layer of the touch display screen 405, the operability control on the UI interface can be controlled according to the pressure operation of the user on the touch display screen 405. The operability control comprises at least one of a button control, a scroll bar control, an icon control and a menu control.

The fingerprint sensor 414 is used for collecting a fingerprint of the user to identify the identity of the user according to the collected fingerprint. Upon recognizing that the user's identity is a trusted identity, processor 401 authorizes the user to perform relevant sensitive operations including unlocking the screen, viewing encrypted information, downloading software, paying, and changing settings, etc. The fingerprint sensor 414 may be disposed on the front, back, or side of the terminal 400. When a physical key or vendor Logo is provided on the terminal 400, the fingerprint sensor 414 may be integrated with the physical key or vendor Logo.

The optical sensor 415 is used to collect the ambient light intensity. In one embodiment, the processor 401 may control the display brightness of the touch display screen 405 based on the ambient light intensity collected by the optical sensor 415. Specifically, when the ambient light intensity is high, the display brightness of the touch display screen 405 is increased; when the ambient light intensity is low, the display brightness of the touch display screen 405 is turned down. In another embodiment, the processor 401 may also dynamically adjust the shooting parameters of the camera assembly 406 according to the ambient light intensity collected by the optical sensor 415.

A proximity sensor 416, also known as a distance sensor, is typically disposed on the front side of the terminal 400. The proximity sensor 416 is used to collect the distance between the user and the front surface of the terminal 400. In one embodiment, when the proximity sensor 416 detects that the distance between the user and the front surface of the terminal 400 gradually decreases, the processor 401 controls the touch display screen 405 to switch from the bright screen state to the dark screen state; when the proximity sensor 416 detects that the distance between the user and the front surface of the terminal 400 gradually becomes larger, the processor 401 controls the touch display screen 405 to switch from the breath screen state to the bright screen state.

Those skilled in the art will appreciate that the configuration shown in fig. 7 is not intended to be limiting of terminal 400 and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components may be used.

EXAMPLE five

In an exemplary embodiment, there is also provided a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a differential fatigue endurance gantry profiling as provided by all inventive embodiments of the present application.

Any combination of one or more computer-readable media may be employed. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, 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 disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.

A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.

Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

Computer program code for carrying out operations for aspects of the present invention may 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 may 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 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 the connection may be made to an external computer (for example, through the Internet using an Internet service provider).

EXAMPLE six

In an exemplary embodiment, an application program product is also provided that includes one or more instructions executable by the processor 401 of the apparatus to perform a differential fatigue endurance frame mapping method as described above.

While embodiments of the invention have been disclosed above, it is not intended to be limited to the uses set forth in the specification and examples. It can be applied to all kinds of fields suitable for the present invention. Additional modifications will readily occur to those skilled in the art. It is therefore intended that the invention not be limited to the exact details and illustrations described and illustrated herein, but fall within the scope of the appended claims and equivalents thereof.

Claims

1. A method of profiling a fatigue-durable differential gantry, the method comprising:

respectively acquiring driving shaft torque data and rotating speed data;

2. The method of claim 1, wherein the separately acquiring drive shaft torque data and rotational speed data comprises:

3. the method of claim 2, wherein the testing system comprises a slip ring torque sensor and a strain gauge disposed on the driving shaft, and a data acquisition device disposed on the test vehicle, wherein the slip ring torque sensor is electrically connected to the data acquisition device and the strain gauge respectively.

4. The method of claim 1, wherein obtaining torque-to-revolution correspondence between different intervals from the drive shaft torque data and the rotational speed data comprises:

5. The method according to claim 1, wherein the calculating of the damage values of the same torque for different test routes by the fatigue accumulated damage theory according to the correspondence between the torques in different sections and the number of rotations comprises:

6. The method of claim 1, wherein the obtaining of the equivalent of 24 km 99% of the user pseudo-damage value through the different user road surface driving ratios and the damage values of the same torque of different testing routes comprises:

7. The method according to claim 1, wherein the obtaining of the fatigue endurance bench spectrum of the differential according to the damage equivalence principle using the pseudo damage value of 99% of users equivalent to 24 kilometres comprises:

8. A differential fatigue endurance bench mapping system, comprising:

9. A terminal, comprising:

one or more processors;

a memory for storing the one or more processor-executable instructions;

wherein the one or more processors are configured to:

performing a differential fatigue endurance bench mapping method as described in any one of claims 1 to 7.

10. A non-transitory computer readable storage medium, wherein instructions in the storage medium, when executed by a processor of a terminal, enable the terminal to perform a differential fatigue endurance gantry profiling method as recited in any one of claims 1 to 7.