CN114995101B - Method for calculating confidence reliability of roadbed bridging train control center computing equipment - Google Patents
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Abstract
The invention discloses a method for calculating the confidence reliability of computing equipment of a roadbed bridging train control center, which comprises the following steps: acquiring a minimum road set S; judging that the edges between the nodes are directed edges or undirected edges, and when the undirected edges and the directed edges exist in the G at the same time, setting a bridge path in the computing equipment of the roadbed bridging column control center; acquiring nodes with undirected edges at two ends as key bridge nodes of the computing equipment of the roadbed bridging train control center; under the two conditions of connection and disconnection of key bridge nodes, reconstructing a connection mode between nodes in the roadbed bridging train control center computing equipment; according to the reconstructed connection mode, calculating the reliability of the end of the roadbed bridging train control center computing equipment under the two conditions that the key bridge nodes are connected and disconnected respectively; and combining and calculating the confidence reliability R All of the roadbed bridging train control center computing equipment.
Description
Technical Field
The invention relates to the technical field of intelligent transportation, in particular to a method for calculating the confidence reliability of computing equipment of a roadbed bridging train control center.
Background
The train control system is used for controlling the running of the train, the reliable running of the train control equipment has an important influence on the running safety of the train, the station train control center computing equipment is used as an important ground subsystem of the train control system, and after receiving information sent by the dispatching system, the train control center computing equipment sends control information to the train through the transponder. The train control center carries out resolving through the logic operation component, and the obtained resolving information is sent to the train through the serial port communication component, so that the train operation is controlled.
The station train control center computing equipment consists of main computing equipment and standby computing equipment, wherein the main computing equipment and the standby computing equipment are connected through high-speed data exchange equipment, and at the moment, the link path of the high-speed data exchange network equipment is equivalent to a bridge path to connect the functional units in the main computing equipment and the functional units in the standby computing equipment. When the main computing equipment fails, the main computing equipment can also be transmitted to the standby computing equipment through the high-speed data exchange network equipment, so that the maximum computing force of the computing equipment of the train control center is maintained, and the normal operation of the train control system can be ensured to the greatest extent. And the serial port communication equipment transmits the result of calculation to the information sink equipment to complete information interaction with other information sink equipment such as a train and the like.
In the development stage of the train control system, design evaluation is required for the reliability of the system, but the fault information of the train control system is usually lacking in the development stage, and the fault time distribution of the product is difficult to obtain. The system failure time distribution given at this time is often a large gap from the system failure distribution in the actual operating environment. While the uncertainty theory in the absence of data has great technical advantages as a new theory describing unordered, probabilistic, ambiguous, approximate properties in an event, playing an important role in the reliability field in recent years. The uncertainty theory is a mathematical system with standardability, self-duality, monotonicity, sub-additivity and product measure axiom from the point of view of the measure theory. By modeling the bridging train control equipment by means of the uncertain theory, the reliability of the system can be evaluated and calculated under the condition that the product fault information is deficient in the system development stage. And no reliability calculation method for bridging the computing equipment of the train control center exists at present.
Therefore, aiming at the bridge train control center computing device, a roadbed bridge train control center computing device is provided, and the reliability computing method is believed to be a problem which needs to be solved by the person skilled in the art.
Disclosure of Invention
In view of the above, the invention provides a method for calculating the confidence reliability of a computing device of a road bed bridging train control center.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
A method for calculating the confidence reliability of a computing device of a roadbed bridging train control center comprises the following steps:
S1, acquiring all communication paths from a source end to a destination end without repeatedly passing through the same component as a minimum road set S according to an internal component communication graph G (V, E) of roadbed bridging train control center computing equipment; wherein each component is a node V, and the communication relationship between the nodes is an edge E;
s2, judging that edges among all nodes are directed edges or undirected edges according to the communication paths in the minimum road set S, wherein when the undirected edges and the directed edges exist in the internal component communication graph G at the same time, bridge paths are arranged in the roadbed bridge train control center computing equipment, and the undirected edges are bridges of the roadbed bridge train control center computing equipment;
S3, acquiring nodes with undirected edges at two ends as key bridge nodes of the computing equipment of the roadbed bridging train control center;
s4, aiming at the key bridge node, enumerating all possible fault logics of the equipment under the condition of binary on-off of the bridge node;
s5, reconstructing a connection mode among nodes in the roadbed bridge train control center computing equipment under the two conditions that the key bridge nodes are connected and disconnected respectively;
s6, respectively calculating the reliability of the end of the roadbed bridging train control center computing equipment under the two conditions of connection and disconnection of the key bridge nodes according to the reconstructed connection mode;
S7, combining and calculating the reliability R All of the roadbed bridging train control center computing equipment according to the reliability R of the two end terminals obtained in the S6, wherein:
Wherein R bridge represents the reliability of the normal operation of the bridging device, Indicating the reliability of end-to-end assurance of the bridge equipment under normal operation; /(I) Indicating that the end-point in the event of a bridge device failure is confident in reliability.
Preferably, the method further comprises the following steps:
judging the connection relation type of the internal components of the roadbed bridging column control center computing equipment according to the connection relation of the internal components of the roadbed bridging column control center computing equipment, wherein the connection relation type comprises series connection, parallel connection, series-parallel connection and bridging;
The specific method for judging the connection relation type comprises the following steps:
For components in the roadbed bridge array control center computing equipment, if any component fails, the roadbed bridge array control center computing equipment cannot complete the original function, and the components in the roadbed bridge array control center computing equipment are judged to be in a series connection relationship;
For components in the roadbed bridge train control center computing equipment, if any one of the components fails, the other components keep working normally, and the roadbed bridge train control center computing equipment can still complete the original functions, and then the components in the roadbed bridge train control center computing equipment are judged to be in a parallel connection relationship;
If the roadbed bridging train control center computing equipment only has a series connection relationship and a parallel connection relationship, judging that components in the roadbed bridging train control center computing equipment are in a series-parallel connection relationship;
And if the roadbed bridging train control center computing equipment does not belong to the series connection, the parallel connection or the series-parallel connection, carrying out the content of S1.
Preferably, in S2, the decision criteria of the directed edge or the undirected edge are: in the minimum path set S, if any two nodes exist in a connection mode of sequence and reverse sequence at the same time, the edge between the two current nodes is an undirected edge, and if the edge does not exist, the edge is a directed edge.
Preferably, the specific content of S5 includes:
under the condition that the key bridge nodes are communicated, removing the key bridge nodes on the basis of the original internal component communication graph G (V, E), reserving other paths conducted by the key bridge nodes, and completing reconstruction of a connection mode among all nodes in the roadbed bridge column control center computing equipment;
And under the condition that the key bridge node is disconnected, removing the key bridge node and other paths conducted by the key bridge node on the basis of the original internal component communication graph G (V, E), and completing the reconstruction of the connection mode among the nodes in the roadbed bridge train control center computing equipment.
Preferably, the specific content of S6 includes:
Under the condition that the key bridge nodes are communicated, calculating the end-to-end reliability of the roadbed bridge train control center computing equipment according to the connection relation reconstructed in the step S5;
under the condition that the key bridge node is disconnected, calculating the end-to-end reliability of the roadbed bridge train control center computing equipment according to the connection relation reconstructed in the step S5;
In the process of calculating the reliability, the end-to-end confidence: if the equipment and the equipment form a series relation, the reliability of the equipment and the equipment is calculated by a lambda operator, which indicates that the equipment and the equipment are small; if the parallel relation is formed between the devices, a operator is used to indicate that the two are large.
Compared with the prior art, the invention discloses a method for calculating the reliability of the reliability calculation device of the road bed bridging train control center, which can calculate and evaluate the reliability index of the calculation device of the train control center under the condition of no large number of equipment component fault information by applying uncertain theory on the basis of giving the reliability of each component of the calculation device of the train control center. The invention has good applicability and is suitable for other similar column control equipment with bridging reliability structures.
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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 to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for calculating the confidence reliability of a computing device of a roadbed bridging train control center;
FIG. 2 is a diagram illustrating a topology of a computing device in a centralized control center according to an embodiment of the present invention;
FIG. 3 is a diagram showing the coupling of the device after reconstitution when the bridge provided by the embodiment of the invention has good performance;
FIG. 4 is a diagram showing the connection of the device after reconstruction when the bridge performance provided by the embodiment of the invention fails.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. 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 embodiment of the invention discloses a method for calculating the confidence reliability of roadbed bridging train control center computing equipment, which is shown in figure 1 and comprises the following steps:
S1, acquiring all communication paths from a source end to a destination end without repeatedly passing through the same component as a minimum road set S according to an internal component communication graph G (V, E) of roadbed bridging train control center computing equipment; wherein each component is a node V, and the communication relationship between the nodes is an edge E;
S2, judging that edges among the nodes are directed edges or undirected edges according to the communication paths in the minimum path set S, wherein when undirected edges and directed edges exist in the internal component communication graph G at the same time, bridge paths are arranged in the computing equipment of the roadbed bridge train control center, and the undirected edges are bridges of the computing equipment of the roadbed bridge train control center;
s3, acquiring nodes with undirected edges at two ends as key bridge nodes of the computing equipment of the roadbed bridging train control center;
s4, aiming at the key bridge node, enumerating all possible fault logics of the equipment under the condition of binary on-off of the bridge node;
S5, reconstructing a connection mode among nodes in the roadbed bridging train control center computing equipment under the two conditions that the key bridge nodes are connected and disconnected respectively;
S6, calculating the end-to-end reliability of the roadbed bridging train control center computing equipment under the two conditions that the key bridge nodes are connected and disconnected respectively according to the reconstructed connection mode;
S7, combining and calculating the reliability R All of the roadbed bridging train control center computing equipment according to the reliability R of the two end terminals obtained in the S6, wherein:
Wherein R V5 represents the reliability of normal operation of the corresponding V 5 device, The reliability of the end-to-end assurance of the other devices when the V 5 device works normally is shown; /(I) Indicating that the end of the remaining devices are confident in reliability when the V 5 device fails.
In order to further implement the above technical solution, the method further includes the following:
Judging the type of the connection relation of the internal components of the computing equipment of the roadbed bridge train control center according to the connection relation of the internal components of the computing equipment of the roadbed bridge train control center, wherein the type of the connection relation comprises series connection, parallel connection, series-parallel connection and bridge connection;
the specific method for judging the connection relation type comprises the following steps:
For components in the computing equipment of the roadbed bridge array control center, if any one of the components fails, the computing equipment of the roadbed bridge array control center cannot complete the original function, and the components in the computing equipment of the roadbed bridge array control center are judged to be in a series connection relationship;
for components in the roadbed bridging row control center computing equipment, if any one of the components fails, the other components keep working normally, and the roadbed bridging row control center computing equipment can still complete the original functions, so that the components in the roadbed bridging row control center computing equipment are judged to be in a parallel connection relationship;
If the computing equipment of the roadbed bridging train control center only has a series connection relationship and a parallel connection relationship, judging that components in the computing equipment of the roadbed bridging train control center are in a series-parallel connection relationship;
And if the computing equipment of the roadbed bridging train control center does not belong to the series, parallel or series-parallel relation, carrying out the content of S1.
In order to further implement the above technical solution, in S2, the decision criteria of the directed edge or the undirected edge are: in the minimum path set S, if any two nodes exist in a connection mode of sequence and reverse sequence at the same time, the edge between the two current nodes is an undirected edge, and if the edge does not exist, the edge is a directed edge.
In order to further implement the above technical solution, the specific content of S5 includes:
under the condition that the key bridge nodes are communicated, removing the key bridge nodes on the basis of the original internal component communication graph G (V, E), reserving other paths conducted by the key bridge nodes, and completing reconstruction of connection modes among nodes in the roadbed bridge train control center computing equipment;
And under the condition that the key bridge nodes are disconnected, removing the key bridge nodes and other paths conducted by the key bridge nodes on the basis of the original internal component connection graph G (V, E), and completing the reconstruction of the connection mode among all nodes in the roadbed bridge train control center computing equipment.
In order to further implement the above technical solution, the specific content of S6 includes:
Under the condition that the key bridge nodes are communicated, calculating the end-to-end reliability of the roadbed bridging train control center calculating equipment according to the connection relation reconstructed in the step S5;
And under the condition that the key bridge node is disconnected, calculating the end-to-end reliability of the roadbed bridge train control center calculating equipment according to the connection relation reconstructed in the step S5.
The above method will be further described with reference to the examples below:
The components of a computing device of a roadbed bridging train control center and the connection thereof are shown in fig. 2, and the functions of the components of the devices in the diagram are as follows:
table 1 roadbed bridging train control center computing equipment assembly and function table
The computing equipment of the roadbed bridge train control center has a plurality of connection modes such as series connection, parallel connection, series connection, bridging and the like, and a judging criterion of the bridging of the computing equipment of the roadbed bridge train control center needs to be given. Before a bridge judgment method is given, firstly, a judgment criterion of a series, parallel and series connection of computing equipment of a roadbed bridge train control center is given:
Series decision criteria: for the 7 devices existing in the system, if any one of the 7 devices fails and the system cannot complete the original functions, the 7 devices are judged to be in a series connection relationship.
Parallel decision criteria: for the 7 devices existing in the system, one device is failed at a time, when any 1 to 6 devices are failed, and the other 6 to 1 non-failed devices in the system keep working normally, the system can still complete the original functions, and the 7 devices are judged to be in parallel connection.
Series-parallel connection judgment criterion: when all the devices in the system are only connected in series and in parallel, the system is judged to be a series-parallel system.
The road bed bridging train control center computing equipment bridge judgment criterion is given as follows:
As shown in fig. 2, in a device, the device abstracts into a finite set of nodes v= (V 1,V2,...,V7) and edges e= (E 1,E2,...,E14). (V, E) constitutes a device connectivity graph G. The element in E is the edge of G, and the following conditions are satisfied at the same time when information in the device is transmitted:
1) Information enters from the source end and is output from the destination end during transmission.
2) Information cannot be repeated through the same component.
All possible connection ways that meet the condition are called the minimum set S of paths for this device from source to sink. If two nodes exist in S in a mode of connecting in sequence and in reverse order at the same time, the edge connecting the two nodes is called an undirected edge, and if the two nodes do not exist, the edge connecting the two nodes is called a directed edge. In fig. 2, information is input from a source end, output from a sink end, and the minimum path set of the system is:
{(V1,V2,V6),(V1,V5,V6),(V1,V5,V7),(V1,V2,V6,V5,V7),(V1,V5,V3,V4,V7),(V1,V2,V6,V5,V3,V4,V7),(V1,V2,V5,V6),(V1,V2,V5,V7),(V1,V2,V5,V4,V7),(V1,V2,V5,V3,V4,V7),(V3,V4,V7),(V3,V5,V6),(V3,V5,V7),(V3,V4,V7,V5,V6),(V3,V5,V1,V2,V6),(V3,V4,V7,V5,V1,V2,V6),(V3,V4,V5,V6),(V3,V4,V5,V7),(V3,V4,V5,V2,V6),(V3,V4,V5,V1,V2,V6)}
According to the decision criterion, E 5,E6,E8,E9,E13,E14 is an undirected edge (marked in red).
If the undirected edge and the directed edge exist in the G at the same time, judging that the device G has a bridge path, wherein the undirected edge is the bridge path of the device G. When both ends of the node are undirected edges, the node is a key bridge node of the device. In fig. 2, V 5 is by nature the critical bridge node of the device.
In the case of an uncertain bridge component binary on-off, enumerating all possible fault combinations of the column control center computing device.
For the device connectivity graph as shown in fig. 2, E 1,E2,E3,E4,E7,E10,E11,E12 is a directed edge and E 5,E6,E8,E9,E13,E14 is a undirected edge, according to the definition of undirected edge and directed edge. V 5 is the critical bridge node.
After the critical bridge node is determined, all possible fault combinations are listed under the binary on-off condition of the bridge node, according to fig. 2, only V 5 is the bridge node, so only the two conditions of V 5 connection or disconnection need to be considered.
When the bridge performance is good, i.e., V 5 is connected, the coupling is as shown in fig. 3, where P 1,P2,P3,P4,P6,P7 is an uncertainty component.
When the bridge performance fails, i.e., V 5 opens. The manner of coupling the device after reconstitution is shown in fig. 4, where P 1,P2,P3,P4,P6,P7 are all uncertainty components.
When the bridge is intact, the reconstructed device coupling is as shown in fig. 3, and the reliability of each assembly is believed to be as follows:
The end-to-end reliability R calculation method of the equipment comprises the following steps:
When the bridge circuit fails, the reconstructed device connection mode is shown in fig. 4, and at the moment, the end of the device is sure that the reliability R calculation method is as follows:
based on the above, the reliability of the roadbed bridging train control center computing device is calculated in a merging way.
The reliability of the roadbed bridge train control center computing equipment end is the sum of the reliability of the roadbed bridge train control center computing equipment end under each logic condition, and the reliability R All is obtained as follows:
R V5 represents the reliability of the normal operation of the corresponding V 5 device, The reliability of the end terminals of the other devices is ensured when the V 5 device works normally. /(I) And (3) representing that the end of the other equipment is ensured to be reliable when the V 5 equipment fails, and the computing equipment of the roadbed bridging train control center is ensured to be reliable R All:
in this embodiment, given the reliability of each component, the reliability of each component is shown in the following table:
Table 2 component confidence reliability table
The end-to-end reliability R calculation method of the equipment comprises the following steps:
[(0.995∨0.995)∧(0.99∨0.99)]∧(0.98∨0.98)＝0.9653
When the bridge circuit fails, the reconstructed device connection mode is shown in fig. 4, and at the moment, the end of the device is sure that the reliability R calculation method is as follows:
The confidence reliability R All of the train control center computing device is:
RAll＝0.985*[(0.995∨0.995)∧(0.99∨0.88)]∧(0.98∨0.98)+0.015*(0.995∨0.99∨0.98)∧(0.995∨0.99∨0.98)＝0.98
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (5)
1. The method for calculating the confidence reliability of the roadbed bridging train control center computing equipment is characterized by comprising the following steps of:
S1, acquiring all communication paths from a source end to a destination end without repeatedly passing through the same component as a minimum road set S according to an internal component communication graph G (V, E) of roadbed bridging train control center computing equipment; wherein each component is a node V, and the communication relationship between the nodes is an edge E;
s2, judging that edges among all nodes are directed edges or undirected edges according to the communication paths in the minimum road set S, wherein when the undirected edges and the directed edges exist in the internal component communication graph G at the same time, bridge paths are arranged in the roadbed bridge train control center computing equipment, and the undirected edges are bridges of the roadbed bridge train control center computing equipment;
s3, judging that nodes with both ends being undirected edges are used as key bridge nodes of the computing equipment of the roadbed bridging train control center;
s4, aiming at the key bridge node, enumerating all possible fault logics of the equipment under the condition of binary on-off of the bridge node;
s5, reconstructing a connection mode among nodes in the roadbed bridge train control center computing equipment under the two conditions that the key bridge nodes are connected and disconnected respectively;
s6, respectively calculating the reliability of the end of the roadbed bridging train control center computing equipment under the two conditions of connection and disconnection of the key bridge nodes according to the reconstructed connection mode;
S7, combining and calculating the reliability R All of the roadbed bridging train control center computing equipment according to the reliability R of the two end terminals obtained in the S6, wherein:
Wherein R bridge represents the reliability of the normal operation of the bridging device, Indicating the reliability of end-to-end assurance of the bridge equipment under normal operation; /(I) Indicating that the end-point in the event of a bridge device failure is confident in reliability.
2. The method for calculating the confidence reliability of the computing device of the roadbed bridging train control center according to claim 1, further comprising the following steps:
judging the connection relation type of the internal components of the roadbed bridging column control center computing equipment according to the connection relation of the internal components of the roadbed bridging column control center computing equipment, wherein the connection relation type comprises series connection, parallel connection, series-parallel connection and bridging;
The specific method for judging the connection relation type comprises the following steps:
For components in the roadbed bridge array control center computing equipment, if any component fails, the roadbed bridge array control center computing equipment cannot complete the original function, and the components in the roadbed bridge array control center computing equipment are judged to be in a series connection relationship;
For components in the roadbed bridge train control center computing equipment, if any one of the components fails, the other components keep working normally, and the roadbed bridge train control center computing equipment can still complete the original functions, and then the components in the roadbed bridge train control center computing equipment are judged to be in a parallel connection relationship;
If the roadbed bridging train control center computing equipment only has a series connection relationship and a parallel connection relationship, judging that components in the roadbed bridging train control center computing equipment are in a series-parallel connection relationship;
And if the roadbed bridging train control center computing equipment does not belong to the series connection, the parallel connection or the series-parallel connection, carrying out the content of S1.
3. The method for calculating the confidence reliability of the computing device of the roadbed bridging train control center according to claim 1, wherein in S2, the decision criteria of the directional edge or the undirected edge are: in the minimum path set S, if any two nodes exist in a connection mode of sequence and reverse sequence at the same time, the edge between the two current nodes is an undirected edge, and if the edge does not exist, the edge is a directed edge.
4. The method for calculating the confidence reliability of the computing device of the roadbed bridging train control center according to claim 1, wherein the specific content of S5 comprises:
Under the condition that the key bridge nodes are communicated, removing the key bridge nodes on the basis of the original internal component communication graph G (V, E), reserving other paths conducted by the key bridge nodes, and completing reconstruction of connection modes among nodes in the roadbed bridge train control center computing equipment;
And under the condition that the key bridge node is disconnected, removing the key bridge node and other paths conducted by the key bridge node on the basis of the original internal component communication graph G (V, E), and completing the reconstruction of the connection mode among the nodes in the roadbed bridge train control center computing equipment.
5. The method for calculating the confidence reliability of the computing device of the roadbed bridging train control center according to claim 1, wherein the specific content of S6 comprises:
Under the condition that the key bridge nodes are communicated, calculating the end-to-end reliability of the roadbed bridge train control center computing equipment according to the connection relation reconstructed in the step S5;
under the condition that the key bridge node is disconnected, calculating the end-to-end reliability of the roadbed bridge train control center computing equipment according to the connection relation reconstructed in the step S5;
The computing process of the end-to-end confidence reliability is as follows: if the equipment and the equipment form a series relation, the reliability of the equipment and the equipment is calculated by a lambda operator, which indicates that the equipment and the equipment are small; if the parallel relation is formed between the devices, a operator is used to indicate that the two are large.
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