CN112287450B - Train transmission control unit characteristic curve evaluation method, device, system and medium - Google Patents
Train transmission control unit characteristic curve evaluation method, device, system and medium Download PDFInfo
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- CN112287450B CN112287450B CN201910615643.XA CN201910615643A CN112287450B CN 112287450 B CN112287450 B CN 112287450B CN 201910615643 A CN201910615643 A CN 201910615643A CN 112287450 B CN112287450 B CN 112287450B
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Abstract
The invention discloses a train transmission control unit characteristic curve evaluation method, which comprises the following steps: s01, acquiring an actual characteristic curve of a train transmission control unit in a test process; s02, comparing the actual characteristic curve with a preset standard characteristic curve to obtain a difference degree; and S03, when the difference is within a preset threshold value, judging that the actual characteristic curve is normal, otherwise, judging that the actual characteristic curve is abnormal. The invention also discloses an evaluation system, which comprises an upper computer and a simulation test platform, wherein the simulation test platform is connected with the transmission control unit of the train to be tested and is used for realizing simulation test; the upper computer is used for executing the steps of the evaluation method. The invention also discloses a device and a medium corresponding to the method. The method, the device, the system and the medium have the advantage of realizing the performance evaluation of the characteristic curve.
Description
Technical Field
The invention mainly relates to the technical field of train testing, in particular to a method, a device, a system and a medium for evaluating a characteristic curve of a train transmission control unit.
Background
The traction characteristic curve of the train refers to a curve drawn by the relation between the total traction (adhesive traction) around the wheel and the speed of the train, and the traction is linearly reduced along with the increase of the speed until reaching a constant power point when the speed of the general train is the lowest, and then the traction is continuously reduced until reaching the upper limit of the constant power point when the train enters a hyperbolic curve of the constant power. Typically, this upper limit is the point of maximum operating speed of the locomotive.
The traction characteristic curve and the braking characteristic curve are two important parameters in train operation, and the two important parameters reflect the performance of an electric transmission system of a train to a certain extent. The designer will design the traction and braking characteristics of the train according to the user's requirements, such as vehicle type, travel route conditions, ramp conditions, acceleration and top speed. Besides hardware conditions such as motor power and the like, parameters can be modified through inversion software to adjust the characteristic curve. After adjustment, the transmission control unit needs to be tested, and whether the actual characteristic curve meets the design requirement or not is evaluated.
At present, for test evaluation of a traction characteristic curve and a brake characteristic curve of a transmission control unit, full-speed scanning of traction and braking is performed through a semi-physical simulation test platform, moments at different speed points are recorded, then a relation curve of the moments and the speeds is drawn, and compared with a design value, and the most frequently used standard is not less than 70% of the design value and not more than 130% of the design value. Although this evaluation method can determine to some extent whether the characteristic curve at this time meets the requirements, it cannot evaluate the performance of the characteristic curve. As shown in fig. 1, the two actual characteristic curves both meet the original evaluation standard, but due to the difference between the two characteristic curves, the parameters of the transmission control unit cannot be adjusted according to which characteristic curve, or the parameter information corresponding to the standard characteristic curve cannot be obtained (in fig. 1, the uppermost curve corresponds to the upper boundary of the design moment +30% error, the lowermost curve corresponds to the upper boundary of the design moment-30% error, and the middle smooth curve is the design curve).
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the technical problems in the prior art, the invention provides a method, a device, a system and a medium for evaluating a characteristic curve of a train transmission control unit, which can realize performance evaluation.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a train transmission control unit characteristic curve evaluation method comprises the following steps:
s01, acquiring an actual characteristic curve of the train transmission control unit in a test process;
s02, comparing the actual characteristic curve with a preset standard characteristic curve to obtain a difference degree;
and S03, when the difference is within a preset threshold value, judging that the actual characteristic curve is normal, otherwise, judging that the actual characteristic curve is abnormal.
Preferably, in step S02, the difference degree is obtained by acquiring a variance or a standard deviation or a range or a dispersion coefficient between the actual characteristic curve and the standard characteristic curve.
Preferably, when the standard characteristic curve includes discrete variables, the variance is obtained based on the following formula:
wherein y is i (i =1, 2 \8230;, n) represents the speed a i Actual moment of time; b i (i =1, 2 \8230;, n) represents the speed a i Standard moment of time;
when the standard characteristic curve is a continuity curve, the variance is obtained based on the following formula:
wherein y = f (x) is an actual characteristic curve, b = E (x) is a design characteristic curve, x is a speed, and c is a preset minimum speed value; d are preset maximum speed values respectively.
Preferably, when the standard characteristic curve includes discrete variables, the standard deviation is obtained based on the following formula:
wherein y is i (i =1, 2 \8230;, n) represents the speed a i Actual moment of time; b i (i =1, 2 \8230;, n) represents the speed a i Standard moment of time;
when the standard characteristic curve is a continuity curve, a standard deviation is obtained based on the following formula:
wherein y = f (x) is an actual characteristic curve, b = E (x) is a design characteristic curve, x is a speed, and c is a preset minimum speed value; d are respectively preset maximum speed values.
Preferably, in step S01, an actual characteristic curve is obtained by acquiring an actual torque value and an actual speed value of the train transmission control unit during the test.
Preferably, in step S03, the smaller the difference, the closer the corresponding actual characteristic curve is to the standard characteristic curve; and adjusting the characteristic parameters of the train transmission control unit through the minimum difference degree.
Preferably, the characteristic parameter comprises one or more of a traction rise impact rate, a rotor time parameter or an excitation reactance.
The invention also discloses a train transmission control unit characteristic curve evaluation device, which comprises
The first module is used for acquiring an actual characteristic curve of the train transmission control unit in the test process;
the second module is used for comparing the actual characteristic curve with a preset standard characteristic curve to obtain a difference degree;
and the third module is used for judging that the actual characteristic curve is normal when the difference degree is within a preset threshold value, and otherwise, judging that the actual characteristic curve is abnormal.
The invention further discloses a train transmission control unit characteristic curve evaluation system, which comprises an upper computer and a simulation test platform, wherein the simulation test platform is connected with the train transmission control unit to be tested and used for realizing simulation test; and the upper computer is connected with the train transmission control unit to be tested and is used for executing the steps of the evaluation method.
The invention also discloses a computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, performs the steps of the evaluation method as described above.
Compared with the prior art, the invention has the advantages that:
according to the train transmission control unit characteristic curve evaluation method, device, system and medium, on the basis of conventional range evaluation, the evaluation of the difference degree is introduced, the performance evaluation of the actual characteristic curve can be realized, the performance of the train transmission control unit can be better reflected, and the accurate adjustment of the train transmission control unit is further realized.
According to the method, the device, the system and the medium for evaluating the characteristic curve of the train transmission control unit, the variance or the standard deviation or the range or the dispersion coefficient between the actual characteristic curve and the standard characteristic curve is obtained and used as the difference degree, the dispersion degree between data can be embodied, and the performance of the train transmission control unit can be embodied better.
According to the train transmission control unit characteristic curve evaluation method, device, system and medium, the characteristic parameters of the train transmission control unit are adjusted through the characteristic curve corresponding to the minimum difference, so that the subsequent characteristic curve is closer to the standard characteristic curve.
Drawings
Fig. 1 is a diagram illustrating a conventional characteristic curve.
FIG. 2 is a flow chart of the method of the present invention.
Fig. 3 is a system configuration diagram of the present invention.
Detailed Description
The invention is further described below in conjunction with the drawings and the detailed description of the invention.
As shown in fig. 2, the method for evaluating a characteristic curve of a train transmission control unit of the present embodiment includes the steps of:
s01, acquiring an actual characteristic curve of the train transmission control unit in a test process;
s02, comparing the actual characteristic curve with a preset standard characteristic curve to obtain a difference degree;
and S03, when the difference is within a preset threshold value, judging that the actual characteristic curve is normal (meets the design standard), and if not, judging that the actual characteristic curve is abnormal (does not meet the design standard).
According to the train transmission control unit characteristic curve evaluation method, on the basis of conventional range evaluation, the evaluation of the difference degree is introduced, the performance evaluation of the actual characteristic curve can be realized, the performance of the train transmission control unit can be better reflected, and the accurate adjustment of the train transmission control unit is further realized.
In step S02, the variance or standard deviation or range or dispersion coefficient between the actual characteristic curve and the standard characteristic curve is obtained as the difference, so as to reflect the dispersion degree between the data and further reflect the performance of the train transmission control unit.
Specifically, when the standard characteristic curve includes discrete variables, the variance is obtained based on the following formula:
wherein y is i (i =1, 2 \8230;, n) represents the speed a i Actual moment of time; b is a mixture of i (i =1, 2 \8230;, n) represents the speed a i Standard moment of time;
when the standard characteristic curve is a continuity curve, the variance is obtained based on the following formula:
wherein y = f (x) is an actual characteristic curve, b = E (x) is a design characteristic curve, x is a speed, and c is a preset minimum speed value; d are respectively preset maximum speed values.
When the standard characteristic curve includes discrete variables, the standard deviation is obtained based on the following formula:
wherein y is i (i =1, 2 \8230;, n) represents the speed a i Actual moment of time; b i (i =1, 2 \8230;, n) represents the speed a i Standard moment of time;
when the standard characteristic curve is a continuity curve, a standard deviation is obtained based on the following formula:
wherein y = f (x) is an actual characteristic curve, b = E (x) is a design characteristic curve, x is a speed, and c is a preset minimum speed value; d are respectively preset maximum speed values.
In step S01, an actual characteristic curve is obtained by obtaining an actual torque value and an actual speed value of the train transmission control unit during the test process, and the actual characteristic curve includes a traction characteristic curve and a braking characteristic curve. In step S03, the smaller the difference, the closer the corresponding actual characteristic curve is to the standard characteristic curve; and adjusting the characteristic parameters of the train transmission control unit through the characteristic curve corresponding to the minimum difference degree, so that the subsequent characteristic curve is closer to the standard characteristic curve. The characteristic parameters comprise traction force rising impact rate, rotor time parameters, excitation reactance and the like. If the rotor time constant has a direct influence on the performance of the control and controlled object, it will also be directly reflected on the characteristic curve, and if the rotor time constant changes due to the actual temperature during the operation, it needs to be compensated or corrected. After correction or compensation, the difference degree is calculated by the same method, if the difference degree is smaller than the previous difference degree, the correction mode at the moment can be selected, and if the difference degree is larger, the opposite correction or compensation mode is adopted.
The invention also correspondingly discloses a device for evaluating the characteristic curve of the train transmission control unit, which comprises
The first module is used for acquiring an actual characteristic curve of the train transmission control unit in the test process;
the second module is used for comparing the actual characteristic curve with a preset standard characteristic curve to obtain a difference degree;
and the third module is used for judging that the actual characteristic curve is normal when the difference degree is within a preset threshold value, and otherwise, judging that the actual characteristic curve is abnormal.
The invention also discloses a computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, performs the steps of the evaluation method as described above. All or part of the flow of the method of the embodiments may be implemented by a computer program, which may be stored in a computer-readable storage medium and executed by a processor, to implement the steps of the embodiments of the methods. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying computer program code, recording medium, U.S. disk, removable hard disk, magnetic diskette, optical disk, computer Memory, read-Only Memory (ROM), random Access Memory (RAM), electrical carrier wave signal, telecommunications signal, software distribution medium, etc. The memory may be used to store computer programs and/or modules, and the processor may perform various functions by executing or executing the computer programs and/or modules stored in the memory, as well as by invoking data stored in the memory. The memory may include high speed random access memory and may also include non-volatile memory such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.
The invention further discloses a computer device comprising a memory and a processor, the memory having stored thereon a computer program which, when executed by the processor, performs the steps of the above-described evaluation method.
As shown in fig. 3, the invention further discloses a train transmission control unit characteristic curve evaluation system, which comprises an upper computer and a simulation test platform, wherein the simulation test platform is connected with the train transmission control unit to be tested and used for realizing simulation test; the upper computer is connected with the transmission control unit of the train to be tested and is used for executing the steps of the evaluation method.
Specifically, a semi-physical simulation test platform of the train transmission control unit is adopted, different software programs are brushed into the transmission control unit, different DCU operation information is set according to an upper computer, an actual torque value and a speed value in the test process are recorded, and whether the design requirements are met or not is judged according to a drawn traction characteristic curve.
As shown in fig. 3, train transmission control unit (DCU) that awaits measuring is connected to semi-physical simulation test platform, also connects to the host computer through net gape and serial ports simultaneously, and the host computer is connected with the display, and semi-physical simulation test platform includes:
the real-time simulator outputs and collects external signals, simulates signal interaction between real equipment of the transmission control unit in real time, simulates simulation control of the transmission control unit on the train, and realizes hardware-in-loop semi-physical real-time simulation.
And the virtual driver console software is used for simulating a network control signal sent by an upper part component of the transmission control unit, controlling the running process of the transmission control unit and receiving and displaying data information uploaded by the transmission control unit. The operation interface comprises a power-up button, a power-on/power-off main switch, a direction handle, a traction button, a traction level button, a brake level button, an emergency traction, a driver control console handle level instruction and a function of simulating partial signal display in a train display screen.
DCU software configuration and monitoring software, which configures DCU software parameters, monitors the running state of each software in the DCU, and judges the software function realization condition through the DCU software configuration and monitoring software in the test process;
and the interference device is used for testing interference from the outside or simulating to generate an interference signal and sending the interference signal to the DCU, verifying whether the inversion re-projection can stably work or not and sending a verification result to the upper computer.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may be made by those skilled in the art without departing from the principle of the invention.
Claims (8)
1. A train transmission control unit characteristic curve evaluation method is characterized by comprising the following steps:
s01, acquiring an actual characteristic curve of the train transmission control unit in a test process;
s02, comparing the actual characteristic curve with a preset standard characteristic curve to obtain a difference degree;
s03, when the difference is within a preset threshold value, judging that the actual characteristic curve is normal, otherwise, judging that the actual characteristic curve is abnormal;
in step S02, the variance or standard deviation or range or dispersion coefficient between the actual characteristic curve and the standard characteristic curve is obtained as the difference;
when the standard characteristic curve includes discrete variables, the variance is obtained based on the following formula:
wherein y is i Representing the speed a i Actual moment of time; b i Indicates the speed a i Standard moment of time; wherein i =1, 2 \ 8230, n;
when the standard characteristic curve is a continuity curve, the variance is obtained based on the following formula:
wherein y = f (x) is an actual characteristic curve, b = E (x) is a design characteristic curve, x is a speed, and c is a preset minimum speed value; d are preset maximum speed values respectively.
2. The train transmission control unit characteristic curve evaluation method of claim 1, wherein when the standard characteristic curve includes discrete variables, a standard deviation is obtained based on the following formula:
wherein y is i Representing the speed a i Actual moment of time; b i Indicates the speed a i Standard moment of time; wherein i =1, 2 8230, n;
when the standard characteristic curve is a continuity curve, a standard deviation is obtained based on the following formula:
wherein y = f (x) is an actual characteristic curve, b = E (x) is a design characteristic curve, x is a speed, and c is a preset minimum speed value; d are respectively preset maximum speed values.
3. The train transmission control unit characteristic curve evaluation method according to any one of claims 1 to 2, wherein in step S01, an actual characteristic curve is obtained by acquiring an actual torque value and an actual speed value of the train transmission control unit during a test.
4. The train transmission control unit characteristic curve evaluation method according to any one of claims 1 to 2, wherein in step S03, the smaller the degree of difference, the closer the corresponding actual characteristic curve is to the standard characteristic curve; and adjusting the characteristic parameters of the train transmission control unit through the minimum difference degree.
5. The train transmission control unit profile evaluation method of claim 4, wherein the characteristic parameters include one or more of a traction rise impact rate, a rotor time parameter, or an excitation reactance.
6. A train transmission control unit characteristic curve evaluation device for performing the train transmission control unit characteristic curve evaluation method according to any one of claims 1 to 5, comprising
The first module is used for acquiring an actual characteristic curve of the train transmission control unit in the test process;
the second module is used for comparing the actual characteristic curve with a preset standard characteristic curve to obtain a difference degree;
and the third module is used for judging that the actual characteristic curve is normal when the difference degree is within a preset threshold value, and otherwise, judging that the actual characteristic curve is abnormal.
7. A train transmission control unit characteristic curve evaluation system is characterized by comprising an upper computer and a simulation test platform, wherein the simulation test platform is connected with a train transmission control unit to be tested and used for realizing simulation test; the upper computer is connected with the train transmission control unit to be tested and is used for executing the steps of the evaluation method of any one of claims 1 to 5.
8. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the evaluation method according to one of claims 1 to 5.
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