CN113139242B

CN113139242B - Online evaluation method and device for performance of pressure change valve of motor train unit

Info

Publication number: CN113139242B
Application number: CN202110527341.4A
Authority: CN
Inventors: 王鹏; 章阳; 蔡田; 韩朝霞; 胡亮; 安志鹏; 程宏明
Original assignee: China Academy of Railway Sciences Corp Ltd CARS; Locomotive and Car Research Institute of CARS; Beijing Zongheng Electromechanical Technology Co Ltd; Tieke Aspect Tianjin Technology Development Co Ltd
Current assignee: China Academy of Railway Sciences Corp Ltd CARS; Locomotive and Car Research Institute of CARS; Beijing Zongheng Electromechanical Technology Co Ltd; Tieke Aspect Tianjin Technology Development Co Ltd
Priority date: 2021-05-14
Filing date: 2021-05-14
Publication date: 2024-01-30
Anticipated expiration: 2041-05-14
Also published as: CN113139242A

Abstract

The invention provides an on-line evaluation method and device for the performance of a pressure change valve of a motor train unit, wherein the method comprises the following steps: establishing a discrete model of the pressure conversion valve according to the relation between the input pressure and the output pressure measured when the pressure conversion valve leaves a factory; acquiring a pressure conversion valve output pressure set value output by a brake controller when the motor train unit runs, and obtaining an input pressure set value through a discrete model; updating the discrete model in real time according to the acquired actual input pressure, actual output pressure and output pressure set values of the pressure conversion valve when the motor train unit runs; extracting a static index of the performance of the pressure conversion valve according to the relation between the pressure input and the pressure output of the pressure conversion valve reflected by the updated discrete model; acquiring dynamic indexes of pressure change valves when the motor train unit runs; and carrying out online evaluation on the performance of the pressure change valve based on the static index, the dynamic index and the related fault data of the pressure change valve, which are collected in the running process of the train. The invention can improve the accuracy of the performance evaluation result of the pressure conversion valve.

Description

Online evaluation method and device for performance of pressure change valve of motor train unit

Technical Field

The invention relates to the technical field of rail train braking systems, in particular to an online evaluation method and device for performance of a pressure change valve of a motor train unit.

Background

The pressure conversion valve plays a role in flow amplification in a train braking system, and is shown as a symbol in a gas circuit of the braking system in fig. 1, and an arrow in the figure represents the flowing direction of gas. The output C pressure (brake cylinder pressure) is varied in a ratio according to the variation of the input Cv pressure, and the ratio value between the two is switched between high and low by the T port pressure. When the train runs at a high speed, the T port has input pressure, and the C port outputs low brake cylinder pressure at the moment so as to ensure that the braking force does not exceed the adhesion limit. In addition, due to the existence of the spool return spring, there is a certain difference in the output C pressure of the pressure conversion valve (i.e., there is a hysteresis characteristic of the pressure conversion valve) at the same input Cv pressure during the rising and falling of the output C pressure. Thus, the pressure change valve outputs the C pressure P _c And input Cv pressure P _cv The relationship between the brake control software and the brake control software can be defined by a lineFitting set { P _cv ＝k _hu ·P _c +b _hu ，P _cv ＝k _hd ·P _c +b _hd ，P _cv ＝k _lu ·P _c +b _lu ，P _cv ＝k _ld ·P _c +b _ld Represented by { k }, where _hu ，k _hd ，k _lu ，k _ld }，{b _hu ，b _hd ，b _lu ，b _ld The fitting slope and intercept of the four conditions, high pressure/rise, high pressure/fall, low pressure/rise, low pressure/fall, respectively.

The performance evaluation of the pressure conversion valve is mainly reflected in the performance of the pressure conversion valve in the process of realizing the functions. The pressure relationship exhibited between ports Cv and C during pressure change of the pressure change valve should be used as a data source for evaluating the performance of the pressure change valve, on the basis of which the performance index is extracted and evaluated.

The existing motor train unit pressure change valve performance evaluation method mostly adopts a simulation or off-line test mode. The simulation method uses AMESim and other software to build a pneumatic model of the pressure conversion valve, and predicts the performance of the pressure conversion valve by changing the values of parameters of component elements such as spring stiffness, piston assembly mass, orifice, pipeline size and the like and simulating different air charging and discharging working conditions. The off-line test method generally needs to build special test equipment, and performs tests such as an air tightness test, a stage charging and discharging test and the like on the pressure conversion valve on the real vehicle to evaluate the performance of the pressure conversion valve. Both methods can obtain the evaluation result, but are off-line and static, so that it is difficult to perform timely and effective evaluation processing on the performance of the dynamic pressure conversion valve of the real vehicle. Because the reliability and the effectiveness of the pressure conversion valve are more concerned in the actual operation of the motor train unit, online, continuous and long-term evaluation is required, and the performance degradation or abnormal phenomenon is discovered and then treated in time. Therefore, the performance evaluation method of the existing pressure conversion valve is difficult to accurately evaluate the pressure conversion valve, and further cannot judge the actual operation vehicle, so that the on-line health prediction and fault management of the train braking system component cannot be realized.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides the on-line evaluation method and the device for the performance of the pressure conversion valve of the motor train unit, which can evaluate the performance of the pressure conversion valve on line and improve the accuracy of the evaluation result of the pressure conversion valve.

In order to solve the technical problems, the invention provides the following technical scheme:

in a first aspect, the present invention provides an on-line evaluation method for performance of a pressure conversion valve of a motor train unit, including:

establishing a discrete model of the pressure conversion valve according to the relation between the input pressure and the output pressure measured when the pressure conversion valve leaves a factory;

acquiring a pressure conversion valve output pressure set value output by a brake controller when the motor train unit runs, and obtaining an input pressure set value through the discrete model;

updating the discrete model in real time according to the acquired actual input pressure, actual output pressure and output pressure set values of the pressure conversion valve when the motor train unit runs;

extracting a static index of the performance of the pressure conversion valve according to the relation between the pressure input and the pressure output of the pressure conversion valve reflected by the updated discrete model;

acquiring dynamic indexes of the pressure conversion valve when the motor train unit runs; and carrying out online evaluation on the performance of the pressure change valve based on the static index, the dynamic index and the related fault data of the pressure change valve, which are collected in the running process of the train.

Wherein the extracting the static index of the performance of the pressure conversion valve according to the relation between the pressure input and the pressure output of the pressure conversion valve reflected by the updated discrete model comprises:

fitting data points consisting of pressure input and pressure output in the discrete model by a least square method to obtain a fitting straight line, and determining a fitting slope, a fitting intercept and a fitting mean square error of the fitting straight line;

and determining abnormal points in the discrete pressure conversion valve model according to the acquired actual input pressure and actual output pressure of the pressure conversion valve, and determining the proportion of the abnormal points in the discrete pressure conversion valve model according to the abnormal points.

The online evaluation of the performance of the pressure conversion valve based on the static index, the dynamic index and the pressure conversion valve related fault data collected in the train operation comprises the following steps:

respectively carrying out weighted summation processing on the static index and the dynamic index to respectively obtain a static level evaluation result and a dynamic level evaluation result;

determining an online performance evaluation result of the pressure conversion valve according to the static level evaluation result and the dynamic level evaluation result;

wherein the static index comprises: fitting slope, fitting intercept, fitting mean square error and abnormal point proportion; the dynamic index comprises: the time ratio of the pressure difference of the brake cylinder when the emergency brake of the motor train unit is applied, the time ratio of the pressure difference of the brake cylinder when the emergency brake of the motor train unit is released and the output pressure fluctuation times of the pressure change valve of the motor train unit; the related fault data of the pressure change valve are used for updating the weight values of the static index and the dynamic index; the weight of the static index refers to a weight value in the process of carrying out weighted summation on the static index; the weight of the dynamic index refers to a weight value in the process of carrying out weighted summation on the dynamic index.

Further, the method further comprises the following steps:

determining static level evaluation results under all working conditions of the pressure change valve of the motor train unit;

and determining a static working condition level evaluation result of the motor train unit according to the static level evaluation result under each working condition.

Further, the method further comprises the following steps:

and determining a vehicle-level evaluation result of the motor train unit based on the static working condition-level evaluation result and the dynamic-level evaluation result.

Further, the method further comprises the following steps:

and determining a vehicle-level evaluation result of each component vehicle of each train motor train unit, and determining a train-level evaluation result according to each vehicle-level evaluation result.

Further, the method further comprises the following steps:

and determining the evaluation results of the train levels corresponding to the trains respectively, and determining the evaluation results of the product levels according to the evaluation results of the train levels.

In a second aspect, the present invention provides an on-line evaluation device for performance of a pressure conversion valve of a motor train unit, including:

the discrete model module is used for establishing a discrete model of the pressure conversion valve according to the relation between the input pressure and the output pressure measured when the pressure conversion valve leaves a factory;

the calculation module is used for obtaining a pressure conversion valve output pressure set value output by the brake controller when the motor train unit runs, and obtaining an input pressure set value through the discrete model;

The updating module is used for updating the discrete model in real time according to the acquired actual input pressure, actual output pressure and output pressure set values of the pressure conversion valve when the motor train unit runs;

the index module is used for extracting the static index of the performance of the pressure conversion valve according to the relation between the pressure input and the pressure output of the pressure conversion valve reflected by the updated discrete model;

the evaluation module is used for acquiring dynamic indexes of the pressure conversion valve when the motor train unit runs; and carrying out online evaluation on the performance of the pressure change valve based on the static index, the dynamic index and the related fault data of the pressure change valve, which are collected in the running process of the train.

In a third aspect, the present invention provides an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method for on-line evaluation of the performance of a train pressure change valve when executing the program.

In a fourth aspect, the present invention provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method for online evaluation of the performance of a pressure change valve of a motor train unit.

According to the technical scheme, the invention provides the on-line evaluation method and the device for the performance of the pressure conversion valve of the motor train unit, and a discrete model of the pressure conversion valve is established according to the relation between the input pressure and the output pressure measured when the pressure conversion valve leaves a factory; acquiring a pressure conversion valve output pressure set value output by a brake controller when the motor train unit runs, and obtaining an input pressure set value through the discrete model; updating the discrete model in real time according to the acquired actual input pressure, actual output pressure and output pressure set values of the pressure conversion valve when the motor train unit runs; extracting a static index of the performance of the pressure conversion valve according to the relation between the pressure input and the pressure output of the pressure conversion valve reflected by the updated discrete model; acquiring dynamic indexes of the pressure conversion valve when the motor train unit runs; and carrying out online evaluation on the performance of the pressure change valve based on the static index, the dynamic index and the related fault data of the pressure change valve, which are collected in the running process of the train. The invention can evaluate the performance of the pressure conversion valve on line, improves the accuracy of the evaluation result of the pressure conversion valve, has better real-time performance and better economy, is directly applied to the actual running train, and has better scale.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic representation of a pressure change valve in a brake system air circuit.

Fig. 2 is a flow chart of an on-line evaluation method for performance of a pressure change valve of a motor train unit according to an embodiment of the present invention.

Fig. 3 is a schematic diagram of a performance grading evaluation architecture in an online evaluation method of performance of a pressure change valve of a motor train unit according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of an on-line evaluation device for performance of a pressure conversion valve of a motor train unit according to an embodiment of the present invention.

Fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The motor train unit pressure change valve is in following four kinds of operating modes in operation, specifically includes: high pressure/rise, high pressure/fall, low pressure/rise, low pressure/fall. The method for online evaluation of the pressure change valve under the four working conditions is the same, and in this embodiment, a high pressure/rising working condition is taken as an example.

The invention provides an embodiment of an online evaluation method for the performance of a pressure change valve of a motor train unit, referring to fig. 2, specifically comprising the following steps:

s101: establishing a discrete model of the pressure conversion valve according to the relation between the input pressure and the output pressure measured when the pressure conversion valve leaves a factory;

in this step, the same method is used to create a discrete model of the pressure conversion valve under four conditions, i.e., high pressure/rise, high pressure/fall, low pressure/rise, and low pressure/fall, based on the input pressure (pressure at the Cv end of the pressure conversion valve) and the output pressure (pressure at the C end of the pressure conversion valve) measured when the pressure conversion valve is shipped. Taking high pressure/rise conditions as an illustration.

Under the high pressure/rising working condition measured in factory, the pressure conversion valve C-Cv of the usable section of the C pressure is linearly fitted as follows: p (P) _cv ＝k _hu ·P _c +b _hu Let the maximum available value of the pressure of the brake cylinder C be P _c-max The corresponding Cv pressure is P _cv-max ，i _L The distance between discrete points (pressure difference), generally i _L Can take the value of 5kpa or 10kpa, then P _cv ＝k _hu ·P _c +b _hu Discretizing intoThe corresponding discrete model-> Wherein p is _cvi And-> Satisfy p _cvj -p _cvi ＝k _hu ·(p _cj -p _ci )。

S102: acquiring a pressure conversion valve output pressure set value output by a brake controller when the motor train unit runs, and obtaining an input pressure set value through the discrete model;

in this step, an output pressure set value P of a pressure conversion valve output by a brake controller during running of a motor train unit is obtained _c-set Let P be _c-set Located at successive p _cs And p is as follows _ct Between which are locatedThe discrete model is based on the set value P _c-set The calculated Cv pressure set point P of the pressure set output _cv-set The method comprises the following steps: p (P) _cv-set ＝p _cvs +(p _cvt -p _cvs )·(P _c-set -p _cs )/i _L . Wherein p is _cvs ＝k _hu ·p _cs +b _hu ，p _cvt ＝k _hu ·p _ct +b _hu 。

S103: updating the discrete model in real time according to the acquired actual input pressure, actual output pressure and output pressure set values of the pressure conversion valve when the motor train unit runs;

s104: extracting a static index of the performance of the pressure conversion valve according to the relation between the pressure input and the pressure output of the pressure conversion valve reflected by the updated discrete model;

in the step, fitting data points consisting of pressure input and pressure output in the discrete model by a least square method to obtain a fitting straight line, and determining a fitting slope, a fitting intercept and a fitting mean square error of the fitting straight line;

It is understood that static metrics include: fitting slope, fitting intercept, fitting mean square error and outlier scale.

Note that, the point fitting slope K _f Reflects how the C port of the pressure conversion valve of the motor train unit outputs a pressure value according to the Cv port, and the normal pressure conversion valve meets the fitting slope K of the available C pressure interval when working at high pressure output _f And 1. When the fit slope deviates from the normal value too much, the performance of the pressure conversion valve is reduced or deviates from the design purpose, the fit slope K _f Is an evaluation index I of (1) _k Represented by the following formula:

wherein, the slope K is fitted _fc Represents the slope value, K, according to the current fit _fi Representing fitted slope value, K, of pressure change valve in factory test _ff Indicating the fit slope value at which the performance of the indicator was considered to decay to failure.

Fitting intercept B _f The characteristic of a hysteresis curve of the pressure conversion valve is reflected, and when the fitting intercept of the air charging stage becomes large, the condition that the specified C pressure can be output only by the pressure of a larger Cv port is indicated, and the braking is easy to occur No fault is applied; when the fit intercept becomes smaller (negative) during the venting phase, it is shown that as Cv pressure decreases, the rate at which C pressure decreases and brake cylinder residual pressure tends to occur during relief. B (B) _f Is an evaluation index I of (1) _b Represented by the following formula:

wherein B is _fc Represents the intercept value according to the current fit, B _fi Representing the intercept value fitted during the factory test of the pressure conversion valve, B _ff Representing the fit intercept value at which the performance of the indicator was deemed to decay to failure.

Fitting mean square error E _f Reflecting the reliability of the components inside the pressure conversion valve. The effective and high-performance pressure conversion valve has higher linearity and mean square error E _f Too large indicates that the magnitude of the C pressure change is too large and unpredictable in the smaller Cv pressure interval, which will negatively affect the accuracy of the brake cylinder pressure control. E (E) _f Is an evaluation index I of (1) _e Represented by the following formula:

wherein E is _fc Represents the mean square error value according to the current fit, E _fi Mean square error value E representing fitting at factory test of pressure conversion valve _ff Representing the fitted mean square error value at which the performance of the indicator is considered to decay to failure.

Abnormal point proportion R of pressure change valve of motor train unit _o Reflecting the possibility of performance degradation from short term failure of the pressure change valve. Too high R _o The pressure conversion valve is prompted to possibly have the phenomena of element failure such as valve core clamping stagnation, rubber template deformation, sealing ring fracture and the like, so that the reliability of the braking system is reduced. R is R _o Is an evaluation index I of (1) _r Represented by the following formula:

wherein R is _fc Representing the number of abnormal points appearing in 1000 updates of the discrete model according to the current real-time update, R _fi Representing the number of thousands of updated abnormal points when the pressure conversion valve leaves the factory for testing, R _ff The number of updated outliers at which the performance of the index was considered to decline to failure is indicated.

S105: acquiring dynamic indexes of the pressure conversion valve when the motor train unit runs; and carrying out online evaluation on the performance of the pressure change valve based on the static index, the dynamic index and the related fault data of the pressure change valve, which are collected in the running process of the train.

In the step, respectively carrying out weighted summation processing on the static index and the dynamic index to respectively obtain a static-level evaluation result and a dynamic-level evaluation result; determining an online performance evaluation result of the pressure conversion valve according to the static level evaluation result and the dynamic level evaluation result;

When the motor train unit runs, data acquisition is carried out on the pressure conversion valve on the motor train unit, and the dynamic index of the pressure conversion valve is determined according to the acquired data.

The dynamic indexes of the pressure conversion valve comprise: the time ratio of the pressure difference of the brake cylinders when the emergency braking of the motor train unit is applied, the time ratio of the pressure difference of the brake cylinders when the emergency braking of the motor train unit is released and the output pressure fluctuation times of the pressure change valve of the motor train unit.

Brake cylinder pressure difference time ratio R when emergency brake (UB) of motor train unit is applied _pt The method reflects the advantages and disadvantages of the dynamic response performance of the pressure conversion valve in the application process. Higher R _pt The C pressure can reach the target value faster, so that the emergency braking distance of the train is reduced. R is R _pt Recording should begin from the Cv pressure reaching within the target error value, and the initial pressure is satisfied to be 0. Its evaluation index I _pt Represented by the following formula:

wherein T is _fc Representing the current calculated pressure difference time ratio average value, T _fi The time-to-average value of the pressure difference between the factory test emergency brake application of the pressure conversion valve is represented by T _ff The time-to-average pressure difference at which the dynamic performance of the emergency brake application of the pressure change valve is considered to decline to failure is represented.

Brake cylinder pressure difference time ratio R when emergency brake (UB) of motor train unit is released _rel The method reflects the advantages and disadvantages of the dynamic response performance of the pressure change valve in the emergency braking relieving process. Higher R _rel The C pressure can be emptied faster, and the time of the train brake relieving process is reduced. R is R _rel The brake cylinder pressure at which the recording is to be completed is 0, the evaluation index I _rel Represented by the following formula:

wherein L is _fc Representing the current calculated pressure difference time ratio average value, L _fi The average value of the pressure difference time ratio when the pressure conversion valve leaves factory and performs emergency brake release test is represented by L _ff The time-to-average pressure difference at which the pressure change valve is considered to be in emergency braking to mitigate dynamic performance decay to failure is shown.

The output pressure fluctuation times of the pressure conversion valve of the motor train unit refer to the pressure conversion valveNumber of fluctuations of the C pressure when the Cv pressure, the R pressure, and the T pressure are constant. The index reflects abnormal activity of the internal components of the pressure change valve. Due to the presence of closed loop control, when the ripple is too large, the brake control software will adjust the Cv pressure to return the C pressure to the target value, so the ripple is defined as: the time interval between the two times of C pressure stabilization is less than or equal to 5s and the fluctuation pressure difference p _flu Meet the requirement of p which is less than or equal to 3kpa _flu Less than or equal to 5kpa. Evaluation index I of the number of pressure fluctuation times _flu Represented by the following formula:

Wherein F is _fc Representing the number of times of C pressure fluctuation in 1000 updates according to the current real-time updated discrete model, F _fi The number of times of updating the C pressure fluctuation and F when the pressure conversion valve leaves the factory for testing is shown thousands times _ff Indicating the number of thousands of updated C pressure fluctuations that are considered to be indicative of performance decay to failure.

As can be seen from the above description, the on-line evaluation method for performance of the pressure conversion valve of the motor train unit provided by the embodiment of the invention establishes a discrete model of the pressure conversion valve according to the relationship between the input pressure and the output pressure measured when the pressure conversion valve leaves the factory; acquiring a pressure conversion valve output pressure set value output by a brake controller when the motor train unit runs, and obtaining an input pressure set value through the discrete model; updating the discrete model in real time according to the acquired actual input pressure, actual output pressure and output pressure set values of the pressure conversion valve when the motor train unit runs; extracting a static index of the performance of the pressure conversion valve according to the relation between the pressure input and the pressure output of the pressure conversion valve reflected by the updated discrete model; acquiring dynamic indexes of the pressure conversion valve when the motor train unit runs; and carrying out online evaluation on the performance of the pressure change valve based on the static index, the dynamic index and the related fault data of the pressure change valve, which are collected in the running process of the train. The invention can evaluate the performance of the pressure conversion valve on line, improves the accuracy of the evaluation result of the pressure conversion valve, has better real-time performance and better economy, is directly applied to the actual running train, and has better scale.

The static stage evaluation result and the dynamic stage evaluation result of the pressure conversion valve are determined based on the above-described embodiments. Further, the performance of the pressure conversion valve of the motor train unit is evaluated by adopting a hierarchical evaluation architecture, the hierarchical evaluation architecture adopts a hierarchical progressive structure, the performance of the pressure conversion valve is evaluated at different layers, and finally, the comprehensive performance index is synthesized, and the hierarchical evaluation architecture is divided into six levels of index level, state level, working condition level, vehicle level, train level and product level, and the hierarchical evaluation architecture is specifically shown in fig. 3:

it should be noted that, all of the 4 static indexes and the 3 dynamic indexes are classified as index-level evaluation results;

and respectively carrying out weighted summation treatment based on the static index and the dynamic index to respectively obtain a static-level evaluation result and a dynamic-level evaluation result, wherein the static-level evaluation result and the dynamic-level evaluation result are classified as state-level evaluation results.

And determining the static level evaluation results of 4 working conditions and 4 working conditions of the pressure conversion valve of the motor train unit, namely determining the respective static level evaluation results of each working condition according to the four working conditions of high pressure/rising, high pressure/falling, low pressure/rising and low pressure/falling of the pressure conversion valve when the train is braked frequently/released. And determining a static working condition level evaluation result of the motor train unit according to the static level evaluation result under each working condition. And the dynamic-stage evaluation result is directly used as the dynamic-working-condition-stage evaluation result. The dynamic working condition level evaluation result and the static working condition level evaluation result are classified as working condition level evaluation results.

And determining a vehicle-level evaluation result (an evaluation result of each vehicle constituting the motor train unit) of the motor train unit based on the static working condition-level evaluation result and the dynamic working condition-level evaluation result, namely synthesizing the dynamic working condition-level evaluation result and the static working condition-level evaluation result into a vehicle-level evaluation result, and evaluating the performance of the pressure conversion valve of each vehicle constituting the motor train unit.

Determining vehicles formed by a certain train of motor train units, and determining a vehicle-level evaluation result corresponding to each vehicle; and synthesizing the vehicle-level evaluation results corresponding to the vehicles respectively to obtain train-level evaluation results. It should be noted that, the train-level evaluation result is the evaluation result of a certain train motor train unit. Because the electric braking can be used in the normal braking process of the motor car, the air braking action time is shorter than that of the trailer, and in addition, the single car can have faults such as braking cutting and the like, so that the air braking action time of each car in the train is different. The vehicle-level performance evaluation results are synthesized into train-level evaluation results, and the performance of the full-train pressure conversion valve can be evaluated.

Because the operation mileage and grouping condition of each train are different, the train level evaluation result is synthesized into the product level evaluation result according to the factors, and the overall performance of one type of pressure conversion valve product can be evaluated.

In the step, the performance evaluation result is divided into six layers, the performance change of the pressure conversion valve can be reflected on different layers, and support is provided for realizing an accurate and personalized overhaul scheme.

In an embodiment of the present invention, an implementation manner of step S103 in the foregoing embodiment is provided, which specifically includes the following:

the discrete model is updated in real time according to the collected actual input pressure, actual output pressure of the pressure conversion valve and the pressure set value output by the brake controller when the motor train unit runs, and the method comprises the following steps:

when the actual input pressure changes, the actual output pressure can be stabilized after a period of time, and the output pressure is updated according to the formula (2) only at the moment when the output pressure reaches the stabilizationThe values of two consecutive points specified in this sequence.

The criterion of the C pressure stabilizing moment is as follows:

criterion 1: cv pressure fluctuation is less than or equal to 1kpa under 5 sampling periods, and the criterion 2 is entered. Wherein the Cv pressure fluctuation is a difference between an average pressure per cycle and the pressure at each sampling point.

Criterion 2: the brake system has no control output, the fluctuation of C pressure in the latest 5 continuous sampling points is less than or equal to 1kpa, and the C pressure enters criterion 3. Wherein the latest 5 consecutive sampling points refer to the current sampling point and the previous 4 sampling points.

Criterion 3: and C pressure fluctuation in the last 5 continuous sampling points is more than or equal to 1kpa, and the moment that the C pressure is stable is judged. Wherein the last 5 consecutive sampling points refer to 5 sampling points before the current sampling point.

Let the braking system at P _c-set Setting the actual input pressure value and the output pressure value of the lower pressure conversion valve to be P respectively when reaching the stable moment _c And P _cv ，P _c Located at successive p _cq And p is as follows _cp Between which are located P _cv Located at successive p _cvq And p is as follows _cvp Between (I)>Will be according to P _c And P _c-set The relationship between them determines the specific update mode.

When |P _c -P _c-set |/i _L If the ratio of p to p is less than or equal to 1 _cvq And p is as follows _cvp Updating the discrete model to change the set value of the output Cv pressure, and controlling the actual Cv pressure input of the pressure change valve by the brake controller according to the set value of the Cv pressure so as to further output P of the pressure change valve _c Changes occur to destabilize the output of the brake control system, thus requiring initialization of Loc _temp ＝p _cv-left ＝p _cv-right =0. Note that Loc _temp 、p _cv-left 、p _cv-right Three parameters are to temporarily store data, loc _temp For the position of the temporary zone, p _cv-left And p _cv-right Two points at both ends of this temporary section.

According to the criterion, all two points are directly updated during updating; updating a point, temporarilyStoring a point; the three cases of two points are temporarily stored, so Loc is sometimes used _temp 、p _cv-left 、p _cv-right Three parameters store temporary values. Wherein according to P _c And P _c-set The relation between the two determines a specific updating mode, which specifically comprises the following steps:

criterion 1: p (P) _cv Should satisfy the formula (1), otherwise the corresponding (P _c ，P _cv ) Marked as outliers and not updated.

Criterion 2: when |P _c -P _c-set |/i _L At > 1, then at P _cv Two points p on the left and right sides _cvq And p is as follows _cvp Neither is P _cv-set Two points p on the left and right sides _cvs And p is as follows _cvt Thus will be directly to p _cq And p is as follows _cp Corresponding Cv pressure value p _cvq And p is as follows _cvp And updating.

Criterion 3: when |P _c -P _c-set |/i _L If Loc is less than or equal to 1 _temp =0, indicating that the last time was not updated or criterion 1 was entered, at this time letWill be according to p _cvs /p _cvt And p is as follows _cvq /p _cvp And updating the coincidence relation among the two. If p _cvt ＝p _cvq Then keep p _cvq Invariable, p _cvq The updated value is assigned to p _cv-left If p _cvs ＝p _cvp Then keep p _cvp Invariable, p _cvp The updated value is assigned to p _cv-right If p _cvt ＝p _cvp And p is _cvs ＝p _cvq Then keep p _cvq And p is as follows _cvp Invariable, p _cvq The updated value is assigned to p _cv-left And p is taken _cvp The updated value is assigned to p _cv-right 。

Criterion 4: when |P _c -P _c-set |/i _L When less than or equal to 1If Loc _temp Not equal to 0, the last entry criterion 2 is described, at this time, according to Loc _temp And (3) withThe relationship between them is updated. If->Or->Then p can be directly taken _cv-left And p _cv-right Current value assignment +.> Corresponding point of (2) and then updating p again _cv-left And p _cv-right . If->Then p needs to be updated first _cv-left /p _cv-right And then p is added _cv-left And p _cv-right Current value assignment +.> Corresponding point of (c) then let

For any continuous Cv pressure point, p as in the above _cvs /p _cvt 、p _cvq /p _cvp 、p _cv-left /p _cv-right If a new sampling point P _c And P _cv Satisfying any one of the above-mentioned updating criteria, p _cvs /p _cvt For example (assume p _cvs ≤P _cv ＜p _cvt )，The update formula is shown as formula (2), wherein p' _cvs /p’ _cvt For updated p _cvs /p _cvt 。

According to the embodiment, the control method and the control device can convert the actual state of the pressure change valve into the output Cv pre-control pressure according to the set C pressure value more accurately, the relation between the input Cv and the output C pressure of the pressure change valve is described more accurately, and further control accuracy of the pressure of the brake cylinder is improved.

Further, in this embodiment, the pressure change valve related fault data is used to update the weight values of the static index and the dynamic index, so that the effectiveness of synthesizing the static/dynamic level evaluation index can be increased, and the reliability of performance evaluation can be improved. Since the pressure conversion valve has less observable data of actual performance change conditions in the initial operation stage, the weight is mainly determined by expert experience, and the weight value is updated by taking fault data as a guide after a certain stage of actual operation. Assume that there are m faults { f } in the brake system fault list that are related to 4 static indicators and 3 dynamic indicators ₁ ，f ₂ ，...，f _m The number of occurrences of these faults is { n }, respectively ₁ ，n ₂ ，...，n _m The importance values of the 4 static indexes and the 3 dynamic indexes relative to the ith fault, which are determined by an expert through an Analytic Hierarchy Process (AHP), are respectively { v } _si1 ，v _si2 ，v _si3 ，v _si4 }，{v _di1 ，v _di2 ，v _di3 Weight w of any one of 4 static indicators determined from fault data for static level evaluation _sj Weight w of any one of (1.ltoreq.j.ltoreq.4) and 3 dynamic indexes for static level evaluation _dt (1.ltoreq.t.ltoreq.3) is represented by the formula (3):

when n is ₁ ＝n ₂ ＝...＝n _m When=0, w _sj ＝w _sje Initial jth static index weight, w, determined by expert by AHP _dt ＝w _dte The initial t-th dynamic index weight determined by an expert through an AHP method is determined when min { n } is satisfied ₁ ，n ₂ ，...，n _m When the number of the fault data is more than or equal to 1, adopting the weight determined by fault data, wherein i is more than or equal to 1 and less than or equal to m.

The state level, the working condition level, the vehicle level, the train level and the product level pressure conversion valve performance evaluation methods are respectively determined by formulas (4), (5), (6), (7) and (8). Wherein C is _s And C _d Evaluation results of static level and dynamic level (dynamic working condition level) respectively, w _k ，w _b ，w _e ，w _r ，w _pt ，w _rel ，w _flu Weights corresponding to static/dynamic indexes respectively; c (C) _sc Is the static working condition level evaluation result, { t _hu ，t _hd ，t _lu ，t _ld }，{C _sc ，C _sc ，C _sc ，C _sc The time ratio and the static evaluation result of the high pressure/rising, high pressure/falling, low pressure/rising and low pressure/falling working conditions in the interval two evaluation time periods are respectively; c (C) _vehicle E for the vehicle-level evaluation result _sc And e _d Respectively determining static working condition weights and dynamic working condition weights for experts; c (C) _train For train level assessment comprising u trains of single cars, t _i And C _vehicle-i The air brake using time duty ratio and the vehicle-level performance evaluation result of the ith vehicle are respectively in the two evaluation time periods; c (C) _product Product-level performance evaluation results, w, for the constitution of atr train operating vehicles _mil-k C, for the proportion of the k train operation mileage to the sum of all train operation mileage _k C at 8 consist for the consist coefficient of the kth train _k ＝1，C _train-k And (5) evaluating the train-level performance of the kth train.

C _sc ＝t _hu C _shu +t _hd C _shd +t _lu C _slu +t _ld C _sld (5)

C _vehicle ＝e _sc C _sc +e _d C _d (6)

In the embodiment, the weights of the indexes (dynamic indexes and static indexes) are updated and are directly applied to the actually operated train, so that the method has better scale; the evaluation process completely adopts the data generated in the train operation, no additional operation flow is needed to be added for the evaluation in the operation, the performance index is closely related to the function of the pressure conversion valve, and the index weight is updated by taking fault data as a guide in the actual operation, so that the train maintenance work can be guided more accurately.

In order to further explain the scheme, the invention provides a specific example of an online evaluation method for the performance of a pressure conversion valve of a motor train unit, which specifically comprises the following contents:

When the pressure conversion valve leaves the factory, performing index threshold test according to the evaluation index to obtain an initial value K _fi ，B _fi ，E _fi ，R _fi ，T _fi ，L _fi ，F _fi And threshold value K _ff ，B _ff ，E _ff ，R _ff ，T _ff ，L _ff ，F _ff . And obtaining the weight of the static index to the static level evaluation result and the weight of the dynamic index to the dynamic level evaluation result by expert evaluation through an AHP method.

When pure air brake UB or EB is applied and released, calculating a pressure rise/time value, counting the number of C pressure fluctuation times when updating thousands times currently, and calculating and updating a dynamic evaluation index value. And calculating static level and dynamic level evaluation results according to the weights in the software.

And counting the time duty ratio of four working conditions of high pressure/rising, high pressure/falling, low pressure/rising and low pressure/falling in the bicycle software in the operation of the bicycle, and calculating the evaluation index of the static working condition level. And calculating a vehicle-level evaluation index value according to the weight given by the expert.

And counting the air brake application duty ratio of the motor train/trailer in a certain time interval, and calculating the train-level evaluation index in the whole-train brake system management software.

And sending the train-level evaluation index to a ground data statistics center through a network, and calculating the performance evaluation index of the pressure conversion valve of the product level according to the grouping information of the train.

According to the above, the weight and threshold of the evaluation index of different levels are determined by expert judgment, factory test, fault data feedback, working condition time duty ratio analysis, dynamic trailer air brake application time analysis, operation mileage statistics and other methods; an analytic hierarchy process model is constructed, and evaluation of performance of the pressure conversion valves at index level, state level, working condition level, vehicle level, train level and product level is realized. Compared with the existing pressure conversion valve performance evaluation method, the method has the following beneficial effects:

1. real-time, online, continuous assessment: the trend of the pressure change valve performance with the time of use can be recorded.

2. Large scale, synchronization: all products that have been used can be evaluated for performance at the same time.

3. Grading: the performance is evaluated at different levels, and accurate overhaul is realized.

4. Economic: no additional equipment, software, and operational procedures are required to evaluate against existing data.

5. Accurate on-site guidance performance: and the evaluation index weight fault is guided, the performance index is closely related to the function, and the requirements of on-site operation and overhaul are met.

The embodiment of the invention provides a specific implementation mode of an on-line evaluation device for the performance of a motor train unit pressure conversion valve, which can realize the whole content in the on-line evaluation method for the performance of the motor train unit pressure conversion valve, and referring to fig. 4, the on-line evaluation device for the performance of the motor train unit pressure conversion valve specifically comprises the following contents:

A discrete model module 10 for establishing a discrete model of the pressure conversion valve according to the relationship between the input pressure and the output pressure measured when the pressure conversion valve leaves the factory;

the calculation module 20 is used for obtaining a pressure conversion valve output pressure set value output by the brake controller when the motor train unit runs, and obtaining an input pressure set value through the discrete model;

the updating module 30 is used for updating the discrete model in real time according to the acquired actual input pressure, actual output pressure and output pressure set values of the pressure conversion valve during running of the motor train unit;

an index module 40, configured to extract a static index of the performance of the pressure conversion valve according to a relationship between a pressure input and a pressure output of the pressure conversion valve reflected by the updated discrete model;

the evaluation module 50 is used for acquiring dynamic indexes of the pressure conversion valve when the motor train unit runs; and carrying out online evaluation on the performance of the pressure change valve based on the static index, the dynamic index and the related fault data of the pressure change valve, which are collected in the running process of the train.

The index module 40 includes:

the fitting unit is used for fitting data points consisting of pressure input and pressure output in the discrete model through a least square method to obtain a fitting straight line, and determining the fitting slope, the fitting intercept and the fitting mean square error of the fitting straight line;

And the abnormal point unit is used for determining abnormal points in the discrete pressure conversion valve model according to the acquired actual input pressure and actual output pressure of the pressure conversion valve and determining the proportion of the abnormal points in the discrete pressure conversion valve model according to the abnormal points.

The evaluation module 50 includes:

the level unit is used for respectively carrying out weighted summation processing on the static index and the dynamic index to respectively obtain a static level evaluation result and a dynamic level evaluation result;

the evaluation unit is used for determining an online performance evaluation result of the pressure conversion valve according to the static level evaluation result and the dynamic level evaluation result;

Further, the method further comprises the following steps:

the stage evaluation module is used for determining each working condition of the pressure change valve of the motor train unit and a static stage evaluation result under each working condition;

and the working condition module is used for determining the static working condition level evaluation result of the motor train unit according to the static level evaluation result under each working condition.

Further, the method further comprises the following steps:

and the vehicle module is used for determining a vehicle-level evaluation result of the motor train unit based on the static working condition-level evaluation result and the dynamic-level evaluation result.

Further, the method further comprises the following steps:

and the train module is used for determining the vehicle-level evaluation results of the vehicles of each train motor train unit, and determining the train-level evaluation results according to the vehicle-level evaluation results.

Further, the method further comprises the following steps:

and the product module is used for determining the evaluation results of the train levels corresponding to the trains respectively and determining the evaluation results of the product level according to the evaluation results of the train levels.

The embodiment of the on-line evaluation device for the performance of the pressure conversion valve of the motor train unit provided by the invention can be particularly used for executing the processing flow of the embodiment of the on-line evaluation method for the performance of the pressure conversion valve of the motor train unit in the embodiment, and the functions of the on-line evaluation device are not repeated herein, and can be referred to the detailed description of the embodiment of the method.

As can be seen from the above description, the on-line evaluation device for performance of the pressure conversion valve of the motor train unit provided by the embodiment of the invention establishes a discrete model of the pressure conversion valve by measuring the relationship between the input pressure and the output pressure of the pressure conversion valve when leaving the factory; acquiring pressure setting input of a pressure conversion valve output by a brake controller when the motor train unit runs, and obtaining pressure setting output through the discrete model; updating the discrete model in real time according to the acquired actual input pressure, actual output pressure of the pressure conversion valve and the pressure set value output by the brake controller when the motor train unit runs; extracting a static index of the performance of the pressure conversion valve according to the relation between the current pressure setting input and the current pressure setting output in the updated discrete model; acquiring dynamic indexes of the pressure conversion valve when the motor train unit runs; and performing online evaluation on the performance of the pressure conversion valve based on the static index, the dynamic index and the collected train fault data. The method can evaluate the performance of the pressure conversion valve on line, improves the accuracy of the evaluation result of the pressure conversion valve, has better real-time performance and better economical efficiency, is directly applied to the actual running train, and has better scale.

The application provides an embodiment of an electronic device for realizing all or part of contents in an online evaluation method of performance of a pressure change valve of a motor train unit, wherein the electronic device specifically comprises the following contents:

a processor (processor), a memory (memory), a communication interface (Communications Interface), and a bus; the processor, the memory and the communication interface complete communication with each other through the bus; the communication interface is used for realizing information transmission between related devices; the electronic device may be a desktop computer, a tablet computer, a mobile terminal, etc., and the embodiment is not limited thereto. In this embodiment, the electronic device may be implemented with reference to an embodiment of the method for implementing the on-line evaluation of the performance of the pressure conversion valve of the motor train unit and an embodiment of the device for implementing the on-line evaluation of the performance of the pressure conversion valve of the motor train unit, and the contents thereof are incorporated herein, and the repetition is omitted.

Fig. 5 is a schematic block diagram of a system configuration of an electronic device 9600 of an embodiment of the present application. As shown in fig. 5, the electronic device 9600 may include a central processor 9100 and a memory 9140; the memory 9140 is coupled to the central processor 9100. Notably, this fig. 5 is exemplary; other types of structures may also be used in addition to or in place of the structures to implement telecommunications functions or other functions.

In one embodiment, the on-line evaluation of the performance of the motor train unit pressure change valve may be integrated into the central processor 9100. The central processor 9100 may be configured to perform the following control:

establishing a discrete model of the pressure conversion valve according to the relation between the input pressure and the output pressure measured when the pressure conversion valve leaves a factory; acquiring a pressure conversion valve output pressure set value output by a brake controller when the motor train unit runs, and obtaining an input pressure set value through the discrete model; updating the discrete model in real time according to the acquired actual input pressure, actual output pressure and output pressure set values of the pressure conversion valve when the motor train unit runs; extracting a static index of the performance of the pressure conversion valve according to the relation between the pressure input and the pressure output of the pressure conversion valve reflected by the updated discrete model; acquiring dynamic indexes of the pressure conversion valve when the motor train unit runs; and carrying out online evaluation on the performance of the pressure change valve based on the static index, the dynamic index and the related fault data of the pressure change valve, which are collected in the running process of the train.

As can be seen from the above description, the electronic device provided in the embodiments of the present application establishes a discrete model of the pressure conversion valve by according to the relationship between the input pressure and the output pressure measured when the pressure conversion valve leaves the factory; acquiring a pressure conversion valve output pressure set value output by a brake controller when the motor train unit runs, and obtaining an input pressure set value through the discrete model; updating the discrete model in real time according to the acquired actual input pressure, actual output pressure and output pressure set values of the pressure conversion valve when the motor train unit runs; extracting a static index of the performance of the pressure conversion valve according to the relation between the pressure input and the pressure output of the pressure conversion valve reflected by the updated discrete model; acquiring dynamic indexes of the pressure conversion valve when the motor train unit runs; and carrying out online evaluation on the performance of the pressure change valve based on the static index, the dynamic index and the related fault data of the pressure change valve, which are collected in the running process of the train. The method can evaluate the performance of the pressure conversion valve on line, improves the accuracy of the evaluation result of the pressure conversion valve, has better real-time performance and better economical efficiency, is directly applied to the actual running train, and has better scale.

In another embodiment, the on-line evaluation device of the performance of the pressure conversion valve of the motor train unit may be configured separately from the central processing unit 9100, for example, the on-line evaluation of the performance of the pressure conversion valve of the motor train unit may be configured as a chip connected to the central processing unit 9100, and the on-line evaluation function of the performance of the pressure conversion valve of the motor train unit is implemented by the control of the central processing unit.

As shown in fig. 5, the electronic device 9600 may further include: a communication module 9110, an input unit 9120, an audio processor 9130, a display 9160, and a power supply 9170. It is noted that the electronic device 9600 need not include all of the components shown in fig. 5; in addition, the electronic device 9600 may further include components not shown in fig. 5, and reference may be made to the related art.

As shown in fig. 5, the central processor 9100, sometimes referred to as a controller or operational control, may include a microprocessor or other processor device and/or logic device, which central processor 9100 receives inputs and controls the operation of the various components of the electronic device 9600.

The memory 9140 may be, for example, one or more of a buffer, a flash memory, a hard drive, a removable media, a volatile memory, a non-volatile memory, or other suitable device. The information about failure may be stored, and a program for executing the information may be stored. And the central processor 9100 can execute the program stored in the memory 9140 to realize information storage or processing, and the like.

The input unit 9120 provides input to the central processor 9100. The input unit 9120 is, for example, a key or a touch input device. The power supply 9170 is used to provide power to the electronic device 9600. The display 9160 is used for displaying display objects such as images and characters. The display may be, for example, but not limited to, an LCD display.

The memory 9140 may be a solid state memory such as Read Only Memory (ROM), random Access Memory (RAM), SIM card, etc. But also a memory which holds information even when powered down, can be selectively erased and provided with further data, an example of which is sometimes referred to as EPROM or the like. The memory 9140 may also be some other type of device. The memory 9140 includes a buffer memory 9141 (sometimes referred to as a buffer). The memory 9140 may include an application/function storage portion 9142, the application/function storage portion 9142 storing application programs and function programs or a flow for executing operations of the electronic device 9600 by the central processor 9100.

The memory 9140 may also include a data store 9143, the data store 9143 for storing data, such as contacts, digital data, pictures, sounds, and/or any other data used by an electronic device. The driver storage portion 9144 of the memory 9140 may include various drivers of the electronic device for communication functions and/or for performing other functions of the electronic device (e.g., messaging applications, address book applications, etc.).

The communication module 9110 is a transmitter/receiver 9110 that transmits and receives signals via an antenna 9111. A communication module (transmitter/receiver) 9110 is coupled to the central processor 9100 to provide input signals and receive output signals, as in the case of conventional mobile communication terminals.

Based on different communication technologies, a plurality of communication modules 9110, such as a cellular network module, a bluetooth module, and/or a wireless local area network module, etc., may be provided in the same electronic device. The communication module (transmitter/receiver) 9110 is also coupled to a speaker 9131 and a microphone 9132 via an audio processor 9130 to provide audio output via the speaker 9131 and to receive audio input from the microphone 9132 to implement usual telecommunications functions. The audio processor 9130 can include any suitable buffers, decoders, amplifiers and so forth. In addition, the audio processor 9130 is also coupled to the central processor 9100 so that sound can be recorded locally through the microphone 9132 and sound stored locally can be played through the speaker 9131.

An embodiment of the present invention also provides a computer-readable storage medium capable of implementing all the steps in the on-line evaluation method of the performance of the pressure conversion valve of the motor train unit in the above embodiment, the computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements all the steps in the on-line evaluation method of the performance of the pressure conversion valve of the motor train unit in the above embodiment, for example, the processor implements the following steps when executing the computer program:

As can be seen from the above description, the computer-readable storage medium provided by the embodiments of the present invention establishes a discrete model of a pressure conversion valve by determining a relationship between an input pressure and an output pressure according to the pressure conversion valve when shipped from a factory; acquiring a pressure conversion valve output pressure set value output by a brake controller when the motor train unit runs, and obtaining an input pressure set value through the discrete model; updating the discrete model in real time according to the acquired actual input pressure, actual output pressure and output pressure set values of the pressure conversion valve when the motor train unit runs; extracting a static index of the performance of the pressure conversion valve according to the relation between the pressure input and the pressure output of the pressure conversion valve reflected by the updated discrete model; acquiring dynamic indexes of the pressure conversion valve when the motor train unit runs; and carrying out online evaluation on the performance of the pressure change valve based on the static index, the dynamic index and the related fault data of the pressure change valve, which are collected in the running process of the train. The method can evaluate the performance of the pressure conversion valve on line, improves the accuracy of the evaluation result of the pressure conversion valve, has better real-time performance and better economical efficiency, is directly applied to the actual running train, and has better scale.

Although the invention provides method operational steps as described in the examples or flowcharts, more or fewer operational steps may be included based on conventional or non-inventive labor. The order of steps recited in the embodiments is merely one way of performing the order of steps and does not represent a unique order of execution. When implemented by an actual device or client product, the instructions may be executed sequentially or in parallel (e.g., in a parallel processor or multi-threaded processing environment) as shown in the embodiments or figures.

It will be appreciated by those skilled in the art that embodiments of the present description may be provided as a method, apparatus (system) or computer program product. Accordingly, the present specification embodiments may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may 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, and the like) having computer-usable program code embodied therein.

The present 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 flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may 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, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The present invention is not limited to any single aspect, nor to any single embodiment, nor to any combination and/or permutation of these aspects and/or embodiments. Moreover, each aspect and/or embodiment of the invention may be used alone or in combination with one or more other aspects and/or embodiments.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention, and are intended to be included within the scope of the appended claims and description.

Claims

1. An on-line evaluation method for the performance of a pressure change valve of a motor train unit is characterized by comprising the following steps:

acquiring dynamic indexes of the pressure conversion valve when the motor train unit runs; performing online evaluation on the performance of the pressure change valve based on the static index, the dynamic index and the related fault data of the pressure change valve collected in the running process of the train;

2. The method for online evaluation of performance of a pressure change valve of a motor train unit according to claim 1, wherein the extracting the static index of the performance of the pressure change valve according to the relationship between the pressure input and the pressure output of the pressure change valve reflected by the updated discrete model comprises:

3. The on-line evaluation method of a motor train unit pressure change valve performance according to claim 1, further comprising:

4. The method for on-line evaluation of pressure change valve performance of a motor train unit according to claim 3, further comprising:

5. The on-line evaluation method of a motor train unit pressure change valve performance according to claim 4, further comprising:

6. The method for on-line evaluation of pressure change valve performance of a motor train unit according to claim 5, further comprising:

7. An on-line evaluation device for performance of a pressure change valve of a motor train unit is characterized by comprising:

the evaluation module is used for acquiring dynamic indexes of the pressure conversion valve when the motor train unit runs; performing online evaluation on the performance of the pressure change valve based on the static index, the dynamic index and the related fault data of the pressure change valve collected in the running process of the train;

wherein, the evaluation module is specifically configured to:

8. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the method for on-line evaluation of the performance of a motor train unit pressure change valve according to any one of claims 1 to 6 when the program is executed by the processor.

9. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, carries out the steps of the method for online evaluation of the performance of a pressure change valve of a motor train unit as claimed in any one of claims 1 to 6.