WO2019175984A1

WO2019175984A1 - Failure level calculation device and failure level calculation system

Info

Publication number: WO2019175984A1
Application number: PCT/JP2018/009798
Authority: WO
Inventors: 亮佑寺部; 浩一郎上田; 敦生葉石
Original assignee: 三菱電機株式会社
Priority date: 2018-03-13
Filing date: 2018-03-13
Publication date: 2019-09-19
Also published as: JP6526362B1; JPWO2019175984A1

Abstract

A failure level calculation device (2) comprises an aggregation failure level calculation unit (21) which, on the basis of a physical quantity of at least one of a plurality of aggregations that each include a plurality of components, calculates an aggregation failure level representing the probability that each aggregation of the plurality of aggregations will fail. The failure level calculation device (2) further comprises a component failure level calculation unit (22) which calculates a component failure level representing the probability that each component of the plurality of components included in a specific aggregation of the plurality of aggregations will fail, on the basis of the aggregation failure level and connection data indicating the connected state between the component and other components.

Description

Failure degree calculation device and failure degree calculation system

The present invention relates to a failure degree calculation device and a failure degree calculation system for calculating a part failure degree indicating a probability of failure for each of a plurality of parts included in an assembly.

Conventionally, before a relatively severe damage is caused to the machine due to wear or deterioration, it is necessary to detect a sign of failure and inform the manager of the machine that the components constituting the machine need to be replaced or repaired. Preventive maintenance technology is drawing attention. For example, a physical quantity of an object constituting a mechanical device is detected by a sensor, it is determined whether an abnormality has occurred in the object based on the detection result, and if an abnormality has occurred, an abnormality has occurred. A technique for notification has been proposed (see, for example, Patent Document 1). A technique for determining whether or not a failure has occurred by performing a simulation has also been proposed (see, for example, Patent Document 2).

JP-A-10-258974 JP-A-9-330120

However, with the technique of Patent Document 1, it is not possible to determine whether or not an abnormality has occurred only for a component to which a sensor is attached. The configuration of the mechanical device is relatively complicated, and it is difficult to attach the sensor to all the parts constituting the mechanical device.

In the technique of Patent Document 2, it is not possible to determine whether or not an abnormality has occurred only for an aggregate modeled by simulation. The assembly includes a plurality of parts, and the mechanical device is configured by a plurality of assemblies. With the technique of Patent Document 2, an aggregate in which an abnormality has occurred can be identified, but it cannot be determined which part of a plurality of parts included in the aggregate has an abnormality. . It is required to provide an apparatus that calculates a component failure degree indicating a probability of failure for a plurality of components included in an assembly.

The present invention has been made in view of the above, and an object of the present invention is to obtain a failure degree calculation device that calculates a part failure degree indicating a probability of failure for a plurality of parts included in an assembly.

In order to solve the above-described problems and achieve the object, the present invention provides a physical quantity for at least one of the plurality of assemblies when each of the plurality of assemblies includes a plurality of parts. Basically, an assembly failure degree calculation unit that calculates an assembly failure degree indicating a probability of failure is provided for each of the plurality of assemblies. According to the present invention, each of a plurality of parts included in a specific assembly among the plurality of assemblies fails based on connection data indicating a connection state with other components and the assembly failure degree. It further has a part failure degree calculation part which calculates the part failure degree which shows a probability.

The failure degree calculation apparatus according to the present invention has an effect of being able to calculate the part failure degree indicating the probability of failure for a plurality of parts included in the assembly.

The figure which shows the structure of the failure degree calculation system concerning embodiment The figure which shows the structure of the some aggregate | assembly and several components in embodiment The figure which shows the connection data which the memory | storage device in embodiment stores FIG. 1 is a diagram for explaining an example of functions of an assembly failure degree calculation unit included in a failure degree calculation apparatus according to an embodiment; FIG. 2 is a diagram for explaining an example of functions of an assembly failure degree calculation unit included in the failure degree calculation apparatus according to the embodiment; The figure which shows each aggregate | assembly failure degree of the some aggregate | assembly in embodiment. The figure which shows the component failure degree of each of several components calculated by the component failure degree calculation part which the failure degree calculation apparatus concerning embodiment has The figure which shows the list | wrist of the component failure degree of each of the several components displayed by the display apparatus which the failure degree calculation system concerning embodiment has A color in which a plurality of assemblies are displayed three-dimensionally by the display device included in the failure degree calculation system according to the embodiment, and each of a plurality of components included in any of the plurality of assemblies corresponds to a component failure degree Showing the situation displayed in the video using The figure which shows a processor in case at least one part function of the aggregate | assembly failure degree calculation part, component failure degree calculation part, and control part which the failure degree calculation apparatus concerning embodiment has is implement | achieved by a processor The figure which shows the processing circuit in case the at least one component which comprises the aggregate | assembly failure degree calculation part, component failure degree calculation part, and control part which the failure degree calculation apparatus concerning embodiment has is implement | achieved by the processing circuit.

Hereinafter, a failure degree calculation device and a failure degree calculation system according to an embodiment of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment.
FIG. 1 is a diagram illustrating a configuration of a failure degree calculation system 1 according to the embodiment. In the embodiment, it is assumed that each of the plurality of aggregates includes a plurality of parts. The example of a some aggregate | assembly is the some component which comprises a mechanical apparatus. Each of the plurality of aggregates is a three-dimensional object. FIG. 1 shows an aggregate 30 and a measuring device 40 that measures a physical quantity of the aggregate 30. The aggregate 30 is an example of one aggregate among a plurality of aggregates.

For example, as an example of an assembly when a simulation of a motor control system is performed, an assembly including at least one component such as a stator, a rotor, a bracket, a fan, and a terminal block, which are generally cited as motor components, Examples of other parts forming the body include connection parts such as screws and O-rings in addition to the main motor parts. Examples of physical quantities include acceleration, temperature, heat, displacement, pressure, sound waves, or electromagnetics. For example, the physical quantity may be a phenomenon or characteristic that can be measured by the measuring device 40.

The failure degree calculation system 1 is calculated by a failure degree calculation device 2 that calculates a component failure degree that indicates a probability of failure for each of a plurality of components included in any of a plurality of assemblies, and the failure degree calculation device 2. And a display device 3 for displaying the component failure degree of each of the plurality of components. An example of the display device 3 is a liquid crystal display or an organic electroluminescence display.

FIG. 1 also shows a storage device 50 that stores connection data indicating a connection state of each of a plurality of components included in any of the plurality of assemblies with other components. Specifically, the storage device 50 has, for each of a plurality of components included in any of the plurality of assemblies, connection data indicating the assembly including the components and the components connected to the components. Is remembered. That is, the connection data is, for example, information on which part is mechanically connected to a certain part. An example of the storage device 50 is a device having a semiconductor memory. The connection data will be further described later with reference to FIG.

FIG. 2 is a diagram showing a configuration of a plurality of aggregates and a plurality of parts in the embodiment. In the embodiment, there are a first aggregate 30X, a second aggregate 30Y, and a third aggregate 30Z. The first aggregate 30X, the second aggregate 30Y, and the third aggregate 30Z are examples of a plurality of aggregates.

The first aggregate 30X has a part A and a part D. Part A and part D are examples of a plurality of parts included in one aggregate. The second aggregate 30Y includes a part B and a part F. The parts B and F are also examples of a plurality of parts included in one aggregate. The third aggregate 30 </ b> Z includes a part C, a part E, and a part G. The part C, the part E, and the part G are also examples of a plurality of parts included in one aggregate.

In FIG. 2, the connection of two parts included in the same assembly is indicated by a single line. A connection between a part included in one of two different sets and a part included in the other set is indicated by a double line.

In the example of FIG. 2, the part A included in the first aggregate 30X includes a part D included in the first aggregate 30X, and a part B included in the second aggregate 30Y. It is connected to the. The component D included in the first assembly 30X is connected to the component A included in the first assembly 30X.

The part B included in the second aggregate 30Y is connected to the part A included in the first aggregate 30X and the part F included in the second aggregate 30Y. The component F included in the second assembly 30Y is connected to the component B included in the second assembly 30Y and the component C included in the third assembly 30Z.

The part C included in the third aggregate 30Z is connected to the part F included in the second aggregate 30Y and the part E included in the third aggregate 30Z. The part E included in the third aggregate 30Z is connected to the parts C and G included in the third aggregate 30Z. The part G included in the third aggregate 30Z is connected to the part E included in the third aggregate 30Z.

FIG. 3 is a diagram illustrating connection data stored in the storage device 50 according to the embodiment. In the embodiment, the plurality of aggregates and the plurality of parts, and the state of the connection of each of the plurality of parts are as shown in FIG. Therefore, the storage device 50 stores connection data constituting the table shown in FIG. That is, for the part A, the storage device 50 includes connection data including information indicating that the part A is included in the first assembly 30X and that the part A is connected to the part D and the part B. Remember. The connection data includes information indicating the situation described with reference to FIG. 2 for each of the parts B, C, D, E, F, and G.

The failure level calculation device 2 calculates an aggregate failure level that indicates a failure probability for each of the multiple sets based on a physical quantity of at least one of the multiple sets. A degree calculation unit 21 is included. FIG. 4 is a first diagram for explaining an example of the function of the assembly failure degree calculation unit 21 included in the failure degree calculation apparatus 2 according to the embodiment. Specifically, FIG. 4 is a diagram illustrating an example of data in which the acceleration of the first aggregate 30X measured by the acceleration sensor changes with time. The acceleration sensor is an example of the measuring device 40.

The aggregate failure degree calculation unit 21 performs a fast Fourier transform on the data shown in FIG. FIG. 5 is a second diagram for explaining an example of the function of the assembly failure degree calculation unit 21 included in the failure degree calculation apparatus 2 according to the embodiment. Specifically, FIG. 5 shows an example of the result of fast Fourier transform performed on the data shown in FIG. 4 by the aggregate failure degree calculation unit 21 with a solid line. That is, FIG. 5 shows an example of the amplitude at each frequency when the aggregate failure degree calculation unit 21 performs the fast Fourier transform on the data shown in FIG. FIG. 5 shows, as a broken line, the result of performing a fast Fourier transform on the acceleration data of the first aggregate 30X measured by the acceleration sensor when the first aggregate 30X is normal in advance. .

FIG. 5 shows that the acceleration indicated by the solid line is “s1” and the acceleration indicated by the broken line is “s0” at the predetermined specific frequency p. The assembly failure degree calculation unit 21 calculates the assembly failure degree R of the first assembly 30X according to the following equation (1).

The assembly failure degree calculation unit 21 may calculate the assembly failure degree of the first assembly 30X as follows. The thermometer measures the temperature of the first aggregate 30X, and the measured temperature is “t1”, and the temperature of the first aggregate 30X when it is normal in advance is “t0”. Assume that. In this case, the assembly failure degree calculation unit 21 may calculate the assembly failure degree R of the first assembly 30X according to the following equation (2). A thermometer is an example of the measuring device 40.

The heat sensor measures the amount of heat of the first assembly 30X, and the amount of heat measured is “v1”, and the amount of heat of the first assembly 30X when it is normal in advance is “v0”. Assume that. In this case, the assembly failure degree calculation unit 21 may calculate the assembly failure degree R of the first assembly 30X according to the following equation (3). The thermal sensor is an example of the measuring device 40.

As in the example described above, the assembly failure degree calculation unit 21 calculates the assembly failure degree of the first assembly 30X based on the physical quantity of the first assembly 30X. Similarly, the assembly failure degree calculation unit 21 calculates the assembly failure degree of each of the second assembly 30Y and the third assembly 30Z. Alternatively, the aggregate failure degree calculation unit 21 may calculate a physical quantity for any one of the first aggregate 30X, the second aggregate 30Y, and the third aggregate 30Z and each of the plurality of aggregates. Based on the rules determined in advance based on the relationship with other aggregates, the aggregate failure degree of each of the first aggregate 30X, the second aggregate 30Y, and the third aggregate 30Z is calculated. calculate.

For convenience of the following description, the first assembly 30X has an assembly failure degree of “20”, the second assembly 30Y has an assembly failure degree of “70”, and the third assembly 30Z has Assume that the aggregate failure degree is “40”. FIG. 6 is a diagram illustrating an aggregate failure degree of each of the multiple aggregates in the embodiment.

The failure degree calculation device 2 includes, for each of a plurality of parts included in any of the plurality of assemblies, connection data indicating a connection state with other parts and a plurality of pieces calculated by the assembly failure degree calculation unit 21. A component failure degree calculation unit 22 is further provided that calculates a component failure degree indicating a failure probability based on each assembly failure degree of the assembly. The connection data is stored in the storage device 50 as described with reference to FIG.

Here, the component failure degree may be a value indicating the probability of failure, for example, an index indicating which component is relatively likely to fail. Alternatively, a value indicating the degree of deterioration may be used. The same applies to the aggregate failure degree.

Specifically, the part failure degree calculation unit 22 calculates the part failure degree of each part according to the following equation (4).

In Expression (4), “Ex” is the component failure degree of the component to be calculated by the component failure degree calculation unit 22. The component for which the component failure level calculation unit 22 calculates the component failure level is an example of a specific component. “Ex1” is an assembly failure degree of an assembly including parts for which the component failure degree calculation unit 22 is to calculate the part failure degree. “Ey1” is an assembly failure degree of an assembly including parts connected to the component for which the part failure degree calculation unit 22 is to calculate the part failure degree. The aggregate failure degree is a value calculated by the aggregate failure degree calculation unit 21. “Nall” is the number of components connected to the component for which the component failure degree calculation unit 22 calculates the component failure degree. That is, the component failure level calculation unit 22 calculates the component failure level of a specific component based on the number of components connected to the specific component.

That is, when the component failure level calculation unit 22 calculates the component failure level of a specific component, first, the component connected to the specific component is determined based on the aggregate failure level of the aggregate including the specific component. Is added to the sum of the failure degrees of the aggregates, and a first aggregate failure degree sum related to a specific part is calculated. The part failure degree calculation unit 22 calculates the part failure degree of a specific part by dividing the first aggregate failure degree total by 1 plus the number of parts connected to the specific part. .

For example, the component failure degree of component A is calculated as follows. The part A is included in the first assembly 30X, and the assembly failure degree of the first assembly 30X is “20”. The part A is connected to the part B, the part B is included in the second assembly 30Y, and the assembly failure degree of the second assembly 30Y is “70”. The part A is also connected to the part D. The part D is included in the first assembly 30X, and the assembly failure degree of the first assembly 30X is “20”. The number of parts connected to the part A is two. Therefore, the part failure degree calculation unit 22 calculates the part failure degree of the part A as the following equation (5). That is, the part failure degree calculation unit 22 calculates that the part failure degree Ex of the part A is “36.7”.

For example, the component failure degree of component B is calculated as follows. The component B is included in the second assembly 30Y, and the assembly failure degree of the second assembly 30Y is “70”. The component B is connected to the component A, the component A is included in the first assembly 30X, and the assembly failure degree of the first assembly 30X is “20”. The component B is also connected to the component F, and the component F is included in the second assembly 30Y, and the assembly failure degree of the second assembly 30Y is “70”. The number of components connected to the component B is two. Therefore, the component failure degree calculation unit 22 calculates the component failure degree of the component B as the following formula (6). That is, the part failure degree calculation unit 22 calculates that the part failure degree Ex of the part B is “53.3”.

As described above, the component failure level calculation unit 22 uses the number of components connected to each component as connection data, and calculates the component failure level of each component according to the above equation (4). FIG. 7 is a diagram illustrating the component failure degree of each of the plurality of components calculated by the component failure degree calculation unit 22 included in the failure degree calculation apparatus 2 according to the embodiment.

The failure level calculation device 2 outputs information indicating the component failure level of each of the plurality of components calculated by the component failure level calculation unit 22 to the display device 3 and causes the display device 3 to display the component failure level. 23. That is, the display device 3 displays the component failure degree of each of the plurality of components calculated by the component failure degree calculation unit 22 of the failure degree calculation device 2.

FIG. 8 is a diagram illustrating a list of component failure levels of each of a plurality of components displayed by the display device 3 included in the failure level calculation system 1 according to the embodiment. For example, as shown in FIG. 8, the display device 3 displays a component failure degree of each of a plurality of components as a list.

FIG. 9 shows a plurality of assemblies displayed three-dimensionally by the display device 3 included in the failure degree calculation system 1 according to the embodiment, and each of a plurality of components included in any of the plurality of assemblies is a component. It is a figure which shows the condition displayed with a moving image using the color corresponding to a failure degree. FIG. 9 shows that component A is displayed in green, component B is displayed in orange, component C is displayed in yellow, component D is displayed in blue, component E is displayed in yellow-green, and component F is displayed in red. Is displayed, indicating that the component G is displayed in yellow-green. For example, as shown in FIG. 9, the display device 3 displays a component having a relatively high component failure level in a color close to red, and displays a component having a relatively low component failure level in a color close to blue. . Actually, the parentheses in FIG. 9 and the characters in the parentheses are not displayed.

For example, as shown in FIG. 9, the display device 3 displays a part having a part failure degree of less than 30 in blue, displays a part having a part failure degree of 30 or more and less than 40 in green, and displays the part failure degree. If the part is 40 or more and less than 50, it is displayed in yellow green, if the part failure degree is 50 or more and less than 53, it is displayed in yellow, and if the part failure degree is 53 or more and less than 60, it is displayed in orange. However, parts having a part failure degree of 60 or more are displayed in red.

As described above, the failure level calculation device 2 uses the connection data and the failure level of each of the plurality of assemblies for each of a plurality of parts included in any of the plurality of assemblies. The component failure degree indicating the probability of performing is calculated. That is, the failure level calculation device 2 can calculate the component failure level indicating the probability of failure for a plurality of components included in the assembly. Furthermore, the failure level calculation device 2 can identify a component having a relatively high component failure level and a component having a relatively low level of component failure among a plurality of components included in one aggregate. it can.

Specifically, in the conventional technique, among the first aggregate 30X, the second aggregate 30Y, and the third aggregate 30Z, as shown in FIG. 6, the aggregate failure degree is higher. It is specified that the second aggregate 30Y has the highest probability of failure. However, in the conventional technique, it cannot be specified which of the component B and the component F included in the second assembly 30Y has a higher probability of failure.

However, the failure degree calculation device 2 calculates the part failure degree of each of the plurality of parts included in any of the plurality of aggregates. That is, since the failure level calculation device 2 calculates the component failure level of each of the component B and the component F included in the second assembly 30Y, either of the component B or the component F fails. It can be specified whether the probability is high.

The display device 3 displays the component failure level of each of the plurality of components calculated by the component failure level calculation unit 22 of the failure level calculation device 2. Furthermore, the display device 3 uses the failure level calculation system 1 to identify a component having a relatively high component failure degree and a component having a relatively low component failure degree among a plurality of components included in one aggregate. You can inform the administrator. The administrator can know a part that needs to be replaced or repaired based on the degree of the part failure displayed by the display device 3, and the mechanical device suddenly fails by replacing or repairing the part. This can be prevented beforehand.

As described above, the display device 3 can display a list of component failure levels of each of a plurality of components as shown in FIG. When the display device 3 displays a list of component failure levels for each of a plurality of components, the administrator of the failure level calculation system 1 must grasp the components that need to be replaced or repaired based on numerical values. Can do.

As shown in FIG. 9, the display device 3 can display a plurality of aggregates in a three-dimensional manner and display each of the plurality of parts as a moving image using a color corresponding to the degree of component failure. When the display device 3 displays a plurality of assemblies three-dimensionally and displays each of the plurality of parts as a moving image using a color corresponding to the part failure degree, the administrator of the failure degree calculation system 1 By paying attention to the above, it is possible to visually know parts that need to be replaced or repaired that change over time.

In addition, the part failure degree calculation unit 22 may calculate the part failure degree of each part according to the following expression (7) instead of the expression (4).

In Expression (7), “w1” indicates a specific amount of a component for which the component failure degree calculation unit 22 is to calculate the component failure degree. “W2” indicates a specific amount of a component connected to the component for which the component failure degree calculation unit 22 is to calculate the component failure degree. “W3” is a specific amount of a component for which the component failure degree calculation unit 22 is to calculate the component failure degree, and a component connected to the component for which the component failure degree calculation unit 22 is to calculate the component failure degree. Shows the average with a specific amount. The specific quantity is a physical quantity or physical property. Examples of physical quantities or physical properties are mass, stiffness, moment of inertia or volume.

That is, when the component failure degree calculation unit 22 calculates the component failure degree of a specific part in accordance with the above equation (7), first, the part failure degree calculation unit 22 specifies the aggregate failure degree of the assembly including the specific part. The value obtained by multiplying a specific amount for a part is added to the following aggregate failure degree partial sum to calculate a second aggregate failure degree sum related to the specific part. An aggregate failure degree partial sum is obtained by multiplying an aggregate failure degree of an aggregate including parts connected to a specific part by a specific amount for the part to obtain a specific value. This is a value obtained by adding specific values of all connected parts.

Next, the component failure degree calculation unit 22 adds the specific amount for each of all the components connected to the specific component to the specific amount for the specific component. The sum is divided by 1 plus the number of parts connected to the specific part to calculate the average of the specific amount for the specific part and the part connected to the specific part. The component failure degree calculation unit 22 divides the second aggregate failure degree total by 1 by adding the number of parts connected to the specific part to the value obtained by multiplying the average. The component failure degree of a specific component is calculated.

That is, the part failure degree calculation unit 22 may calculate the part failure degree of a specific part based on a specific amount for each of the specific part and the part connected to the specific part. When the component failure degree calculation unit 22 calculates the component failure degree of each component according to the above equation (7), the failure degree calculation device 2 calculates the component failure degree in consideration of a specific amount for each component. be able to.

In the above-described embodiment, the part failure degree calculation unit 22 calculates the part failure degree of each of the plurality of parts included in any of the plurality of aggregates. However, the component failure level calculation unit 22 may calculate only the component failure levels of a plurality of components included in a specific assembly among the plurality of assemblies. Each of the plurality of parts included in the specific assembly is an example of the specific part. For example, when the specific aggregate is the second aggregate 30Y, the component failure degree calculation unit 22 may calculate only the component failure degrees of the parts B and F. Parts B and F are examples of specific parts.

As shown in FIG. 3, the connection data includes, for each of a plurality of parts included in a specific aggregate, a connection state with other parts included in the specific aggregate, and a specific set of the plurality of aggregates. The connection state with the components contained in the assembly other than the body is shown. When the component failure degree calculation unit 22 calculates the component failure degree of a specific part included in a specific assembly, the component failure degree calculation unit 22 determines a specific failure based on the connection state with the component connected to the specific component indicated by the connection data. The component failure degree of the component is calculated.

When the component failure level calculation unit 22 calculates only the component failure level of a plurality of components included in a specific assembly, the control unit 23 indicates the component failure level of each of the plurality of components included in the specific assembly. Information is output to the display device 3 to display the component failure degree on the display device 3. The display device 3 displays the component failure degree of each of a plurality of components included in the specific assembly. For example, the display device 3 displays a part failure degree of each of a plurality of parts included in a specific assembly as a list. For example, the display device 3 displays a specific assembly three-dimensionally, and displays each of a plurality of components included in the specific assembly using, for example, a moving image using a color corresponding to the component failure degree.

FIG. 10 illustrates a processor in a case where at least some of the functions of the assembly failure degree calculation unit 21, the component failure degree calculation unit 22, and the control unit 23 included in the failure degree calculation device 2 according to the embodiment are realized by the processor 61. FIG. That is, at least some functions of the assembly failure degree calculation unit 21, the component failure degree calculation unit 22, and the control unit 23 may be realized by the processor 61 that executes a program stored in the memory 62.

The processor 61 is a CPU (Central Processing Unit), a processing device, an arithmetic device, a microprocessor, a microcomputer, or a DSP (Digital Signal Processor). FIG. 10 also shows the memory 62.

When at least some of the functions of the assembly failure degree calculation unit 21, the component failure degree calculation unit 22, and the control unit 23 are realized by the processor 61, the partial functions include the processor 61, software, firmware, or Realized by a combination of software and firmware. Software or firmware is described as a program and stored in the memory 62.

The processor 61 implements at least some of the functions of the assembly failure degree calculation unit 21, the component failure degree calculation unit 22, and the control unit 23 by reading and executing a program stored in the memory 62.

That is, when at least some of the functions of the assembly failure degree calculation unit 21, the component failure degree calculation unit 22, and the control unit 23 are realized by the processor 61, the failure degree calculation apparatus 2 includes the assembly failure degree calculation unit 21, It has a memory 62 for storing a program in which steps executed by at least a part of the component failure degree calculation unit 22 and the control unit 23 are executed as a result.

It can be said that the program stored in the memory 62 causes the computer to execute a procedure or method executed by at least a part of the assembly failure degree calculation unit 21, the component failure degree calculation unit 22, and the control unit 23.

The memory 62 is non-volatile such as RAM (Random Access Memory), ROM (Read Only Memory), flash memory, EPROM (Erasable Programmable Read Only Memory), EEPROM (registered trademark) (Electrically Erasable Programmable Read-Only Memory), etc. Or it is a volatile semiconductor memory, a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, or a DVD (Digital Versatile Disk).

In FIG. 11, at least some of the constituent elements constituting the assembly failure degree calculation unit 21, the component failure degree calculation unit 22, and the control unit 23 included in the failure degree calculation apparatus 2 according to the embodiment are realized by the processing circuit 63. FIG. That is, at least some of the functions of the assembly failure degree calculation unit 21, the component failure degree calculation unit 22, and the control unit 23 may be realized by the processing circuit 63.

The processing circuit 63 is dedicated hardware. The processing circuit 63 is, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), or a combination thereof. It is. Some of the assembly failure degree calculation unit 21, the component failure degree calculation unit 22, and the control unit 23 may be dedicated hardware separate from the remaining part.

Of the plurality of functions of the assembly failure degree calculation unit 21, the component failure degree calculation unit 22, and the control unit 23, a part of the plurality of functions is realized by software or firmware, and the rest of the plurality of functions is dedicated hardware. It may be realized with. Thus, the plurality of functions of the assembly failure degree calculation unit 21, the component failure degree calculation unit 22, and the control unit 23 can be realized by hardware, software, firmware, or a combination thereof.

In the technique disclosed in Patent Document 2, an abnormality can be determined only for an aggregate modeled by simulation. That is, abnormality cannot be determined up to the part level constituting the assembly. In Patent Document 2, if the simulation is performed with the assembly being detailed to the part level, the simulation model becomes complicated, so it is necessary to perform a large-scale calculation, and the specifications and calculation time of the simulation apparatus greatly increase. To do. Therefore, the apparatus cost and simulation cost also increase. Furthermore, since the apparatus is enlarged, it may not be mounted on, for example, a motor control device.

By using this embodiment, it is possible to perform abnormality determination at the component level using the simulation results using the aggregate as a model. Therefore, high-accuracy abnormality determination is performed without having to increase the specifications of the simulation apparatus. Therefore, the above-described problem can be solved.

The configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

1 failure degree calculation system, 2 failure degree calculation device, 21 assembly failure degree calculation unit, 22 parts failure degree calculation unit, 23 control unit, 3 display device, 30 assembly, 30X first assembly, 30Y second Aggregate, 30Z 3rd aggregate, 40 measuring device, 50 storage device, 61 processor, 62 memory, 63 processing circuit, A, B, C, D, E, F, G components, p frequency.

Claims

In the case where each of the plurality of aggregates includes a plurality of parts, the probability of failure of each of the plurality of aggregates is indicated based on a physical quantity of at least one of the plurality of aggregates. An aggregate failure degree calculation unit for calculating an aggregate failure degree;
A part indicating a probability of failure based on connection data indicating a connection state with other parts and the degree of failure of the aggregate for each of a plurality of parts included in the specific aggregate among the plurality of aggregates A failure degree calculation device comprising: a component failure degree calculation unit that calculates a failure degree.
The component failure degree calculation unit calculates a component failure degree of a specific part included in the specific assembly, and is connected to the specific component indicated by the connection data among the plurality of assemblies. The failure degree calculation apparatus according to claim 1, wherein a component failure degree of the specific part is calculated based on the assembly failure degree of the assembly including the component.
The failure level calculation according to claim 2, wherein the component failure level calculation unit calculates a component failure level of the specific component based on the number of components connected to the specific component. apparatus.
The component failure degree calculation unit calculates a component failure degree of the specific part based on a physical quantity or a physical characteristic of each of the specific part and a part connected to the specific part. The failure degree calculation apparatus according to claim 3.
A control unit that outputs information indicating a component failure level of each of a plurality of components included in the specific assembly calculated by the component failure level calculation unit to a display device, and causes the display device to display the component failure level. The failure degree calculation device according to claim 1, further comprising:
The failure degree calculation device according to any one of claims 1 to 5,
A failure degree calculation system comprising: a display device that displays a part failure degree of each of a plurality of parts included in the specific assembly calculated by the part failure degree calculation unit.
The failure degree calculation system according to claim 6, wherein the display device displays a part failure degree of each of the plurality of parts as a list.
The specific aggregate is a three-dimensional object,
The failure degree according to claim 6, wherein the display device displays the specific assembly in a three-dimensional manner and displays each of the plurality of components using a color corresponding to the component failure degree. Calculation system.