Motor train unit traction adhesion state identification method and device

Abstract

The invention provides a motor train unit traction adhesion state identification method and device, and relates to the technical field of high-speed motor train unit adhesion control. The method comprises the steps that the wheel set linear speed and the trailer speed of the motor train unit are obtained, and the creep speed and the acceleration of the motor train unit are determined according to the wheel set linear speed and the trailer speed; performing grading judgment on the creep speed of the motor train unit to obtain a creep speed grade, and performing grading judgment on the acceleration of the motor train unit to obtain an acceleration grade; and performing comprehensive state judgment on the creep speed level and the acceleration level to obtain a traction adhesion state identification result of the motor train unit. According to the motor train unit traction adhesion state identification method and device provided by the embodiment of the invention, the control performance of the motor train unit at different speeds and different adhesion coefficients can be ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of high-speed train adhesion control technology, and particularly relates to a train traction adhesion state recognition method and device. BACKGROUND

[0002] The traction and braking of a train rely on the friction force acting on the moving contact surface in the process of wheel-rail rolling contact. The two contact surfaces in the contact area produce relative motion of sliding, so the motion form of wheel-rail contact is "both rolling and sliding", which is called "creep". As the traction force or braking force acting on the wheel increases, the adhesion area between the wheel and the rail decreases, and the creep area increases. When the traction force or braking force reaches the saturation value, the creep area will cover the entire contact area. Greater than this value, the tangential force and the corresponding creep tend to the adhesion limit. Exceeding this limit, the tangential force transmission between the wheel and the rail will be damaged, and the creep will quickly develop into true sliding, eventually causing the wheel to spin or slide. This process is called the adhesion-creep characteristic of wheel-rail, and the specific process is shown in Figure 1 .

[0003] In order to reflect the adhesion characteristic of wheel-rail, the adhesion coefficient is defined, which is the ratio of the adhesion force (traction force or braking force) F between the wheel-rail contact interface to the vertical force P of the wheel-rail: μ = F / P; the creep speed is defined, which is the difference between the circumferential speed R•ω of the wheel and the forward speed υ of the wheel. The train adhesion influencing factors include track surface contamination, climate, speed, line, wheel diameter, axle load and transfer, driving mode, etc., as shown in Figure 2 .

[0004] The wheel-rail adhesion performance is a key indicator affecting the safety, stability and stability of train operation. When the adhesion condition of the train wheel and rail is poor, it will cause the train wheel and rail to spin or slide, and serious spinning will cause the rail to be scratched, and serious sliding will cause the wheelset to be scratched, affecting the safety of train operation.

[0005] The adhesion control method widely used on the train at present is based on the creep speed. When the diagnosis of spinning or sliding is made, the output torque of the motor traction / braking is controlled as soon as possible through the PI regulator to suppress the adhesion deterioration phenomenon, improve the adhesion state, and avoid the situation of scratching the wheel and the rail, as shown in Figure 3The sanding is continuously applied to realize the wheel-rail adhesion when the train creep speed exceeds the limit value. The method is simple and easy to implement in engineering, but the high-speed rail application environment is very complex, and the train often runs at high speed in severe rain and snow weather. The traditional fixed creep speed adhesion control method cannot realize the optimal adhesion force play in the whole speed range, may lose more adhesion force as the premise to avoid the wheel-rail friction phenomenon, cannot maximize the application of wheel-rail adhesion, and the adhesion coefficient is also different under different application conditions. The fixed control parameters cannot guarantee the control performance under different speeds and different adhesion coefficients. According to the continuous sanding application of the creep speed, the sand box resource is wasted to a certain extent, and fine control needs to be considered. SUMMARY

[0006] In view of the problems in the prior art, the embodiment of the present application provides a motor train unit traction adhesion state recognition method and device, which can at least partially solve the problems in the prior art.

[0007] In one aspect, the present application provides a motor train unit traction adhesion state recognition method, comprising:

[0008] obtaining the wheel pair linear speed and the trailer speed of the motor train unit, and determining the motor train unit creep speed and the motor train unit acceleration according to the wheel pair linear speed and the trailer speed;

[0009] grading the motor train unit creep speed to obtain the creep speed level, and grading the motor train unit acceleration to obtain the acceleration level;

[0010] comprehensively determining the creep speed level and the acceleration level to obtain the traction adhesion state recognition result of the motor train unit.

[0011] Among them, the determination of the motor train unit creep speed and the motor train unit acceleration according to the wheel pair linear speed and the trailer speed comprises:

[0012] subtracting the trailer speed from the wheel pair linear speed to obtain the motor train unit creep speed;

[0013] differentially calculating the wheel pair linear speed to obtain the motor train unit acceleration.

[0014] Among them, the comprehensive state determination of the creep speed level and the acceleration level to obtain the traction adhesion state recognition result of the motor train unit comprises:

[0015] determining a first comprehensive state determination result corresponding to the creep speed level, and determining a second comprehensive state determination result corresponding to the acceleration level;

[0016] selecting a traction adhesion state of a higher level from the first comprehensive state determination result and the second comprehensive state determination result as the traction adhesion state identification result.

[0017] The traction adhesion state identification method of the motor train unit further comprises:

[0018] performing adhesion enhancement control according to a first adhesion enhancement control strategy corresponding to the creep speed level, and performing adhesion enhancement control according to a second adhesion enhancement control strategy corresponding to the acceleration level.

[0019] The traction adhesion state identification method of the motor train unit further comprises:

[0020] if it is determined that the creep speed level is greater than or equal to a first preset level, performing torque control according to a first torque control strategy;

[0021] if it is determined that the creep speed level is less than the first preset level, performing torque control according to a second torque control strategy;

[0022] if it is determined that the acceleration level is greater than or equal to a second preset level, performing torque control according to a first torque control strategy;

[0023] if it is determined that the acceleration level is less than the second preset level, performing torque control according to a second torque control strategy.

[0024] The traction adhesion state identification method of the motor train unit further comprises:

[0025] if it is determined that there is torque reduction in the control strategy, performing torque reduction adjustment control in a first stage, a second stage, a third stage and a fourth stage in sequence;

[0026] The control strategy comprises the first adhesion enhancement control strategy, the second adhesion enhancement control strategy and the first torque control strategy; the first stage applies torque reduction at a fast speed, and sanding is applied in this adhesion deterioration stage, the second stage maintains torque reduction and waits for adhesion recovery, the third stage quickly cancels a part of torque reduction, and the fourth stage slowly cancels all torque reduction until the creep speed level and the acceleration level are both at the lowest level.

[0027] In one aspect, the present application provides a motor train unit traction adhesion state identification device comprising:

[0028] An acquisition unit is configured to acquire a wheel pair linear speed and a trailer speed of a motor train unit, and determine a motor train unit creep speed and a motor train unit acceleration according to the wheel pair linear speed and the trailer speed.

[0029] A determination unit is configured to determine the EMU creep speed and obtain a creep speed level, and determine the EMU acceleration and obtain an acceleration level;

[0030] A recognition unit is configured to comprehensively determine the creep speed level and the acceleration level, and obtain a traction adhesion state recognition result of the EMU.

[0031] In another aspect, the embodiment of the present application provides a computer device, which comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the following method when executing the computer program.

[0032] The wheel pair linear speed and the trailer speed of the EMU are acquired, and the EMU creep speed and the EMU acceleration are determined according to the wheel pair linear speed and the trailer speed.

[0033] The EMU creep speed is determined and a creep speed level is obtained, and the EMU acceleration is determined and an acceleration level is obtained.

[0034] The creep speed level and the acceleration level are comprehensively determined, and a traction adhesion state recognition result of the EMU is obtained.

[0035] The embodiment of the present application provides a computer readable storage medium, which comprises:

[0036] The computer readable storage medium stores a computer program, and the computer program is executed by a processor to implement the following method.

[0037] The wheel pair linear speed and the trailer speed of the EMU are acquired, and the EMU creep speed and the EMU acceleration are determined according to the wheel pair linear speed and the trailer speed.

[0038] The EMU creep speed is determined and a creep speed level is obtained, and the EMU acceleration is determined and an acceleration level is obtained.

[0039] The creep speed level and the acceleration level are comprehensively determined, and a traction adhesion state recognition result of the EMU is obtained.

[0040] The embodiment of the present application further provides a computer program product, which comprises a computer program, and the computer program is executed by a processor to implement the following method.

[0041] The wheel pair linear speed and the trailer speed of the EMU are acquired, and the EMU creep speed and the EMU acceleration are determined according to the wheel pair linear speed and the trailer speed.

[0042] The creep speed of the motor train unit is graded and determined to obtain a creep speed level, and the acceleration of the motor train unit is graded and determined to obtain an acceleration level;

[0043] The creep speed level and the acceleration level are comprehensively determined to obtain a traction adhesion state recognition result of the motor train unit.

[0044] The motor train unit traction adhesion state recognition method and device provided by the embodiment of the application obtain the wheel pair linear speed and the trailer speed of the motor train unit, determine the creep speed and the acceleration of the motor train unit according to the wheel pair linear speed and the trailer speed, grade and determine the creep speed of the motor train unit to obtain a creep speed level, grade and determine the acceleration of the motor train unit to obtain an acceleration level, and comprehensively determine the creep speed level and the acceleration level to obtain a traction adhesion state recognition result of the motor train unit, so that the control performance of the motor train unit under different speeds and different adhesion coefficients can be ensured. BRIEF DESCRIPTION OF DRAWINGS

[0045] In order to more clearly illustrate the technical solutions of the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only constitute some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor. In the drawings:

[0046] Figure 1 is a schematic diagram provided by the prior art for explaining the wheel-rail adhesion characteristics.

[0047] Figure 2 is a schematic diagram provided by the prior art for explaining the wheel-rail adhesion influencing factors.

[0048] Figure 3 is a schematic diagram provided by the prior art for explaining the adhesion control method based on the creep speed.

[0049] Figure 4 is a flowchart of the motor train unit traction adhesion state recognition method provided by an embodiment of the application.

[0050] Figure 5 is a flowchart of the motor train unit traction adhesion state recognition method provided by another embodiment of the application.

[0051] Figure 6 is a flowchart of the creep speed level determination provided by an embodiment of the application.

[0052] Figure 7 is a flowchart of the acceleration level determination provided by an embodiment of the application.

[0053] Figure 8 is a flowchart of torque adjustment provided by an embodiment of the present application.

[0054] Figure 9 is a structural schematic diagram of a motor train set traction adhesion state recognition device provided by an embodiment of the present application.

[0055] Figure 10 is a computer device entity structure schematic diagram provided by an embodiment of the present application. DETAILED DESCRIPTION

[0056] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, further detailed description will be made to the embodiments of the present application in combination with the drawings. Herein, the illustrative embodiments of the present application and the description thereof are used to explain the present application, but not as a limitation to the present application. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other at will.

[0057] Figure 4 is a flowchart of a motor train set traction adhesion state recognition method provided by an embodiment of the present application, as shown in Figure 4 The motor train set traction adhesion state recognition method provided by the embodiment of the present application comprises:

[0058] Step S1: obtaining wheel pair linear speed and trailer speed of a motor train set, and determining motor train set creep speed and motor train set acceleration according to the wheel pair linear speed and the trailer speed.

[0059] Step S2: performing hierarchical determination on the motor train set creep speed to obtain a creep speed level, and performing hierarchical determination on the motor train set acceleration to obtain an acceleration level.

[0060] Step S3: performing comprehensive state determination on the creep speed level and the acceleration level to obtain a traction adhesion state recognition result of the motor train set.

[0061] In the above step S1, the device obtains wheel pair linear speed and trailer speed of a motor train set, and determines motor train set creep speed and motor train set acceleration according to the wheel pair linear speed and the trailer speed. The device can be a computer device executing the method. The acquisition, storage, use, processing and the like of data in the technical scheme of the present application all conform to the relevant provisions. The determination of the motor train set creep speed and the motor train set acceleration according to the wheel pair linear speed and the trailer speed comprises:

[0062] subtracting the trailer speed from the wheel pair linear speed to obtain the motor train set creep speed;

[0063] differentially calculating the wheel pair linear speed to obtain the motor train set acceleration.

[0064] As shown in Figure 5 , the wheel pair linear speed V r of the motor train unit is collected in real time t , the trailer speed of the motor train unit is collected as the train reference speed V d , and the difference between the wheel pair linear speed and the trailer speed is the creep speed V r =V t . The wheel pair linear speed V r is differentiated to obtain the acceleration A=d(V r ) / dt. According to the creep speed V d , the creep speed level m is determined, according to the acceleration A, the acceleration level n is determined, the current adhesion state is comprehensively determined, and then the corresponding torque reduction and torque reduction slope value are obtained. After the torque reduction takes effect, the sanding adhesion increasing signal is applied according to the adjustment state of the torque, and the traction state recognition, torque reduction, and sanding adhesion increasing control process is completed.

[0065] In the above step S2, the device classifies the motor train unit creep speed to obtain the creep speed level, and classifies the motor train unit acceleration to obtain the acceleration level. As shown in Figure 6 , the creep speed level determination method is exemplified, which specifically includes determining according to the current creep speed value. If the creep speed value is in the 1st threshold range, the creep speed level is determined to be 0, and no treatment is required.

[0066] If the creep speed value is in the 2nd threshold range, the creep speed level is determined to be 1, and it is considered that the creep occurs but is not serious, and the sanding is temporarily applied without torque reduction.

[0067] If the creep speed value is in the 3rd threshold range, the creep speed level is determined to be 2, and it is considered that the creep phenomenon is aggravated, and a smaller slope is applied to a smaller torque reduction.

[0068] If the creep speed value is in the 4th threshold range, the creep speed level is determined to be 3, and it is considered that the creep phenomenon is serious, a larger slope is applied to a larger torque reduction, and the reduction value is obtained by linear interpolation according to the creep speed.

[0069] If the creep speed value is in the 5th threshold range, the creep speed level is determined to be 4, and it is considered that the creep phenomenon is very serious, and the torque value is quickly set to 0, that is, the maximum torque reduction is applied.

[0070] As shown in Figure 7 , the acceleration level determination method is exemplified, which includes determining according to the current acceleration value. If the acceleration value is lower than the lower limit threshold, the acceleration level is determined to be 0, and no treatment is required.

[0071] If the acceleration value is higher than the low limit threshold and lower than the high limit threshold, a larger torque reduction is applied with a larger slope, and the reduction value is linearly interpolated according to the size of the creep speed.

[0072] If the acceleration value is higher than the high limit threshold, the torque value set value needs to be quickly reduced to 0, that is, the maximum torque reduction is applied.

[0073] In the above step S3, the device comprehensively determines the slip speed level and the acceleration level to obtain the traction adhesion state recognition result of the EMU. The comprehensive determination of the slip speed level and the acceleration level to obtain the traction adhesion state recognition result of the EMU includes:

[0074] Determine the first comprehensive state determination result corresponding to the slip speed level, and determine the second comprehensive state determination result corresponding to the acceleration level; the first comprehensive state determination result and the second comprehensive state determination result can refer to the above description.

[0075] Select a higher level traction adhesion state from the first comprehensive state determination result and the second comprehensive state determination result as the traction adhesion state recognition result. The higher level traction adhesion state can be understood as the traction adhesion state with more serious traction adhesion. That is, if the traction adhesion corresponding to the first comprehensive state determination result is more serious than the traction adhesion corresponding to the second comprehensive state determination result, the first comprehensive state determination result is determined as the traction adhesion state recognition result.

[0076] That is, if the traction adhesion corresponding to the second comprehensive state determination result is more serious than the traction adhesion corresponding to the first comprehensive state determination result, the second comprehensive state determination result is determined as the traction adhesion state recognition result.

[0077] The EMU traction adhesion state recognition method further includes:

[0078] According to the first adhesion increasing control strategy corresponding to the slip speed level, adhesion increasing control is performed; and according to the second adhesion increasing control strategy corresponding to the acceleration level, adhesion increasing control is performed. As shown in Figure 6 The first adhesion increasing control strategy includes slip speed reduction = 0, sanding, reduction = interpolation x 10%, reduction = interpolation, and reduction = current value.

[0079] As shown in Figure 7 The second adhesion increasing control strategy includes acceleration reduction = current torque, acceleration reduction = interpolation calculation, and acceleration reduction = 0.

[0080] The EMU traction adhesion state recognition method further includes:

[0081] If it is determined that the creep speed level is greater than or equal to a first preset level, torque control is performed according to a first torque control strategy;

[0082] If it is determined that the creep speed level is less than the first preset level, torque control is performed according to a second torque control strategy; as Figure 6 As shown in the figure, the torque given value turns after the torque reduction, in order to facilitate the real-time calculation of the torque given value in the scheme, define a new variable-idling cruise torque memory value as the real-time torque given value, if the creep speed level is 2, 3, 4, the idling cruise torque memory value is the turning value of the previous beat updated in real time, if the creep speed level is not 2, 3, 4, the idling cruise torque memory value remains unchanged at the turning point value, that is, there is no torque reduction, and the torque no longer turns.

[0083] If it is determined that the acceleration level is greater than or equal to a second preset level, torque control is performed according to a first torque control strategy;

[0084] If it is determined that the acceleration level is less than the second preset level, torque control is performed according to a second torque control strategy. As Figure 7 As shown in the figure, if the acceleration level is high (level 5 or 6), the idling cruise torque memory value is the turning value of the previous beat updated in real time, if the acceleration level is not 5 or 6, the idling cruise torque memory value remains unchanged at the turning point value, that is, there is no torque reduction, and the torque no longer turns.

[0085] The EMU traction adhesion state recognition method further comprises:

[0086] If it is determined that there is torque reduction in the control strategy, torque reduction adjustment control is performed in the first stage, the second stage, the third stage and the fourth stage in turn;

[0087] The control strategy includes the first adhesion increasing control strategy, the second adhesion increasing control strategy and the first torque control strategy; the first stage applies torque reduction value quickly, and applies sanding in this adhesion deterioration stage, the second stage maintains reduction application and waits for adhesion recovery, the third stage quickly withdraws part of the torque reduction value, and the fourth stage slowly withdraws all torque reduction values until the creep speed level and the acceleration level are the lowest level.

[0088] As Figure 8As shown, after determining the adhesion state and applying the torque reduction, the first stage is to apply the torque reduction value quickly, and to apply sanding in this adhesion deterioration stage; the second stage is an adhesion recovery waiting stage, that is, to maintain the reduction application and wait for adhesion recovery; the third stage is a torque quick recovery stage, in which a part of the torque reduction value is quickly withdrawn; the fourth stage is a torque slow recovery stage, in which the whole torque reduction value is slowly withdrawn until the acceleration level and the creep speed level are both 0, representing that the wheel-rail adhesion is completely recovered. No sanding is applied in the third and fourth stages to increase adhesion.

[0089] The traction adhesion state recognition method for the EMU provided in the embodiments of the present application sets multiple adhesion speeds and acceleration levels, calculates and then determines the adhesion state according to the current real-time detected speed value, and outputs the torque reduction according to different adhesion states and different slopes and values, so as to realize fine control of adhesion reduction torque and sanding adhesion increase. The method is applied to high-speed EMUs in complex operation conditions and higher speed levels, and ensures safe and reliable operation, and improves the adhesion utilization rate as much as possible.

[0090] In the wide application of high-speed EMUs, the adhesion conditions are more and more complex, and the train operation speed is higher and higher, which puts forward higher requirements for train adhesion control. If the train cannot be diagnosed and the adhesion deterioration phenomenon cannot be inhibited in time, the train operation safety is affected, and in severe cases, the wheel-rail friction is caused. Therefore, the scheme of fine control of adhesion reduction torque and sanding adhesion increase according to the adhesion state classification has rich application scenarios and practical value.

[0091] The traction adhesion state recognition method for the EMU provided in the embodiments of the present application obtains the wheel pair linear speed and the trailer speed of the EMU, determines the EMU creep speed and the EMU acceleration according to the wheel pair linear speed and the trailer speed, classifies and determines the EMU creep speed to obtain the creep speed level, classifies and determines the EMU acceleration to obtain the acceleration level, and comprehensively determines the creep speed level and the acceleration level to obtain the traction adhesion state recognition result of the EMU, so as to ensure the control performance of the EMU under different speeds and different adhesion coefficients.

[0092] In the above optional embodiments, the determination of the EMU creep speed and the EMU acceleration according to the wheel pair linear speed and the trailer speed comprises:

[0093] The wheel pair linear speed is subtracted from the trailer speed to obtain the EMU creep speed. Refer to the above embodiments for description.

[0094] The wheel pair linear speed is differentiated to obtain the EMU acceleration. Refer to the above embodiments for description.

[0095] In the optional embodiment above, the comprehensive state determination on the creep speed level and the acceleration level is performed to obtain the traction adhesion state recognition result of the motor train unit, which comprises:

[0096] A first comprehensive state determination result corresponding to the creep speed level is determined, and a second comprehensive state determination result corresponding to the acceleration level is determined; refer to the above embodiments for description, which will not be repeated here.

[0097] The traction adhesion state with a higher level is selected from the first comprehensive state determination result and the second comprehensive state determination result as the traction adhesion state recognition result. Refer to the above embodiments for description, which will not be repeated here.

[0098] In the optional embodiment above, the traction adhesion state recognition method of the motor train unit further comprises:

[0099] The adhesion increasing control is performed according to the first adhesion increasing control strategy corresponding to the creep speed level, and the adhesion increasing control is performed according to the second adhesion increasing control strategy corresponding to the acceleration level. Refer to the above embodiments for description, which will not be repeated here.

[0100] In the optional embodiment above, the traction adhesion state recognition method of the motor train unit further comprises:

[0101] If it is determined that the creep speed level is greater than or equal to a first preset level, torque control is performed according to a first torque control strategy; refer to the above embodiments for description, which will not be repeated here.

[0102] If it is determined that the creep speed level is less than the first preset level, torque control is performed according to a second torque control strategy; refer to the above embodiments for description, which will not be repeated here.

[0103] If it is determined that the acceleration level is greater than or equal to a second preset level, torque control is performed according to a first torque control strategy; refer to the above embodiments for description, which will not be repeated here.

[0104] If it is determined that the acceleration level is less than the second preset level, torque control is performed according to a second torque control strategy. Refer to the above embodiments for description, which will not be repeated here.

[0105] In the optional embodiment above, the traction adhesion state recognition method of the motor train unit further comprises:

[0106] If it is determined that there is torque reduction in the control strategy, torque reduction adjustment control is sequentially performed in a first stage, a second stage, a third stage and a fourth stage; refer to the above embodiments for description, which will not be repeated here.

[0107] The control strategy includes the first viscosity increasing control strategy, the second viscosity increasing control strategy and the first torque control strategy; the first stage is to quickly apply torque reduction value, and sanding is applied in the adhesion deterioration stage, the second stage is to maintain the application of torque reduction value and wait for the recovery of adhesion, the third stage is to quickly cancel a part of torque reduction value, and the fourth stage is to slowly cancel all torque reduction value until the creep speed level and the acceleration level are both the lowest level.

[0108] Figure 9 Figure 1 is a structural schematic diagram of a motor train set traction adhesion state recognition device provided by an embodiment of the present application, as shown in the figure, the motor train set traction adhesion state recognition device provided by the embodiment of the present application includes an acquisition unit 901, a determination unit 902 and a recognition unit 903, wherein: Figure 9

[0109] The acquisition unit 901 is configured to acquire wheel pair linear speed and trailer speed of the motor train set, and determine creep speed and acceleration of the motor train set according to the wheel pair linear speed and the trailer speed; the determination unit 902 is configured to perform hierarchical determination on the creep speed of the motor train set to obtain a creep speed level, and perform hierarchical determination on the acceleration of the motor train set to obtain an acceleration level; and the recognition unit 903 is configured to perform comprehensive state determination on the creep speed level and the acceleration level to obtain a traction adhesion state recognition result of the motor train set.

[0110] Specifically, the acquisition unit 901 in the device is configured to acquire wheel pair linear speed and trailer speed of the motor train set, and determine creep speed and acceleration of the motor train set according to the wheel pair linear speed and the trailer speed; the determination unit 902 is configured to perform hierarchical determination on the creep speed of the motor train set to obtain a creep speed level, and perform hierarchical determination on the acceleration of the motor train set to obtain an acceleration level; and the recognition unit 903 is configured to perform comprehensive state determination on the creep speed level and the acceleration level to obtain a traction adhesion state recognition result of the motor train set.

[0111] The motor train set traction adhesion state recognition device provided by the embodiment of the present application acquires wheel pair linear speed and trailer speed of the motor train set, and determines creep speed and acceleration of the motor train set according to the wheel pair linear speed and the trailer speed; performs hierarchical determination on the creep speed of the motor train set to obtain a creep speed level, and performs hierarchical determination on the acceleration of the motor train set to obtain an acceleration level; and performs comprehensive state determination on the creep speed level and the acceleration level to obtain a traction adhesion state recognition result of the motor train set, which can guarantee the control performance of the motor train set under different speeds and different adhesion coefficients.

[0112] ​The traction adhesion state recognition device for a motor train set provided by the embodiments of the present application can be specifically used for executing the processing procedures of the above-mentioned method embodiments, and the functions thereof will not be repeated here, and the detailed description can be referred to the above-mentioned method embodiments.

[0113] Figure 10 The computer device entity structure schematic diagram provided by the embodiments of the present application is shown in Figure 10 The computer device comprises a memory 1001, a processor 1002, and a computer program stored in the memory 1001 and executable on the processor 1002, and the processor 1002 implements the following method when executing the computer program.

[0114] The wheel pair linear speed and the trailer speed of the motor train set are acquired, and the motor train set creep speed and the motor train set acceleration are determined according to the wheel pair linear speed and the trailer speed.

[0115] The motor train set creep speed is classified and determined to obtain a creep speed level, and the motor train set acceleration is classified and determined to obtain an acceleration level.

[0116] The creep speed level and the acceleration level are comprehensively determined to obtain the traction adhesion state recognition result of the motor train set.

[0117] The embodiments of the present application disclose a computer program product, which comprises a computer program, and the computer program implements the following method when executed by a processor.

[0118] The wheel pair linear speed and the trailer speed of the motor train set are acquired, and the motor train set creep speed and the motor train set acceleration are determined according to the wheel pair linear speed and the trailer speed.

[0119] The motor train set creep speed is classified and determined to obtain a creep speed level, and the motor train set acceleration is classified and determined to obtain an acceleration level.

[0120] The creep speed level and the acceleration level are comprehensively determined to obtain the traction adhesion state recognition result of the motor train set.

[0121] The embodiments of the present application provide a computer readable storage medium, which stores a computer program, and the computer program implements the following method when executed by a processor.

[0122] The wheel pair linear speed and the trailer speed of the motor train set are acquired, and the motor train set creep speed and the motor train set acceleration are determined according to the wheel pair linear speed and the trailer speed.

[0123] The creep speed of the EMU is classified and determined to obtain the creep speed level, and the acceleration of the EMU is classified and determined to obtain the acceleration level;

[0124] By comprehensively determining the creep speed level and the acceleration level, the traction adhesion state identification result of the EMU is obtained.

[0125] Compared with existing technical solutions, the traction adhesion state identification method for high-speed trains provided in this invention obtains the wheel set linear speed and trailer speed of the high-speed train, determines the train's creep speed and acceleration based on the wheel set linear speed and trailer speed, classifies the train's creep speed to obtain a creep speed level, and classifies the train's acceleration to obtain an acceleration level, and performs a comprehensive state determination on the creep speed level and acceleration level to obtain the traction adhesion state identification result of the high-speed train. This method can ensure the control performance of the high-speed train under different speeds and different adhesion coefficients.

[0126] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0127] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0128] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1the function specified in one or more blocks.

[0129] These computer program instructions can also be loaded into computer or other programmable data processing devices, so that a series of operational steps are performed on the computer or other programmable data processing devices to generate computer-implemented processes, thus the instructions executed on the computer or other programmable data processing devices provide processes for implementing the flow Figure 1 one or more flows and / or blocks Figure 1 Figure 1 the function specified in one or more blocks.

[0130] In the description of the present specification, the description of the terms "one embodiment", "one specific embodiment", "some embodiments", "for example", "exemplary", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0131] The above-described specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present application. It should be understood that the above-described is only a specific embodiment of the present application and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for identifying the traction adhesion state of a high-speed train, characterized in that, include: The wheel set linear velocity and trailer speed of the EMU are obtained, and the creep speed and acceleration of the EMU are determined based on the wheel set linear velocity and trailer speed. The creep speed of the EMU is classified and determined to obtain the creep speed level, and the acceleration of the EMU is classified and determined to obtain the acceleration level; By comprehensively determining the creep speed level and the acceleration level, the traction adhesion state identification result of the EMU is obtained.

2. The method for identifying the traction adhesion state of a high-speed train according to claim 1, characterized in that, The process of determining the train's creep speed and acceleration based on the wheelset linear speed and the trailer speed includes: Subtracting the wheel set linear velocity from the trailer speed yields the trainset creep speed; The acceleration of the EMU is obtained by differentiating the linear velocity of the wheelset.

3. The method for identifying the traction adhesion state of a high-speed train according to claim 1, characterized in that, The comprehensive state determination of the creep velocity level and the acceleration level to obtain the traction adhesion state identification result of the EMU includes: Determine the first comprehensive state judgment result corresponding to the creep velocity level, and determine the second comprehensive state judgment result corresponding to the acceleration level; The higher-level traction adhesion state is selected from the first comprehensive state determination result and the second comprehensive state determination result as the traction adhesion state identification result.

4. The method for identifying the traction adhesion state of a high-speed train according to claim 1, characterized in that, The method for identifying the traction adhesion state of a high-speed train also includes: Viscosity control is performed according to a first viscosity control strategy corresponding to the creep speed level; and viscosity control is performed according to a second viscosity control strategy corresponding to the acceleration level.

5. The method for identifying the traction adhesion state of a high-speed train according to claim 4, characterized in that, The method for identifying the traction adhesion state of a high-speed train also includes: If the creep speed level is determined to be greater than or equal to the first preset level, then torque control is performed according to the first torque control strategy; If it is determined that the creep speed level is less than the first preset level, then torque control is performed according to the second torque control strategy; If it is determined that the acceleration level is greater than or equal to the second preset level, then torque control is performed according to the first torque control strategy; If it is determined that the acceleration level is less than the second preset level, then torque control is performed according to the second torque control strategy.

6. The method for identifying the traction adhesion state of a high-speed train according to claim 5, characterized in that, The method for identifying the traction adhesion state of a high-speed train also includes: If it is determined that there is torque reduction in the control strategy, then torque reduction adjustment control is executed sequentially in the first stage, the second stage, the third stage, and the fourth stage. The control strategy includes a first viscosity-enhancing control strategy, a second viscosity-enhancing control strategy, and a first torque control strategy. In the first stage, a torque reduction value is rapidly applied, and sand is applied during this stage of adhesion deterioration. In the second stage, the reduction application is maintained while waiting for adhesion to recover. In the third stage, a portion of the torque reduction value is rapidly withdrawn. In the fourth stage, all torque reduction values ​​are slowly withdrawn until both the creep speed level and the acceleration level are at their lowest levels.

7. A device for identifying the traction adhesion status of a high-speed train, characterized in that, include: The acquisition unit is used to acquire the wheel set linear speed and trailer speed of the EMU, and determine the EMU creep speed and EMU acceleration based on the wheel set linear speed and trailer speed; The determination unit is used to classify and determine the creep speed of the EMU to obtain the creep speed level, and to classify and determine the acceleration of the EMU to obtain the acceleration level; The identification unit is used to make a comprehensive state determination on the creep speed level and the acceleration level to obtain the traction adhesion state identification result of the EMU.

8. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the method of any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the method of any one of claims 1 to 6.

10. A computer program product, characterized in that, The computer program product includes a computer program that, when executed by a processor, implements the method of any one of claims 1 to 6.

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