JP2912359B1 - Simulation method and recording medium recording the program - Google Patents

Abstract

Abstract: PROBLEM TO BE SOLVED: To freely change parameters and algorithms of calculation formulas in a simulation system at any time without recompiling. SOLUTION: System definition data such as parameters of a calculation formula and an algorithm in a simulation system is created in a table format for each item by using a spreadsheet software or the like in a computer, and is saved in an external storage medium in a CSV format. The simulation system reads out the stored system definition data, and executes the simulation with reference to the data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simulation method for performing a simulation according to a computer program and a recording medium on which the program is recorded.

[0002]

2. Description of the Related Art In general, a simulation system needs to frequently change parameters and algorithms due to its nature. Traditionally, to implement this change,
It was necessary to re-create the executable program through coding and linking by performing coding appropriate for the processing requirements. However, this conventional technique has the following problems.

[0003]

The first problem is that coding, compiling and linking must be performed again in order to change the processing of a program once created. The reason is that in order to create a program using the currently used programming language, it must be compiled. Second
The problem is that in order to replace the executable program, the system must be stopped. The reason is that in order to replace the recompiled execution program with the currently running program, the system must be stopped and the execution program must be replaced. A third problem is that simulation logic cannot be freely changed at any time. The reason is that the time and personnel factors required for changing the program increase as the system becomes larger.

[0004] It is an object of the present invention to provide a simulation method for solving such a problem and a recording medium on which a program thereof is recorded.

[0005]

In a simulation system, the set values of parameters and the number of possible algorithms are enormous, and changing the settings requires accuracy as a simulation. The present invention changes parameters and algorithms of calculation formulas in a simulation system without recompiling.

That is, according to the present invention, parameters and algorithms of calculation formulas in a simulation system (hereinafter, referred to as "system definition data") are stored in a computer such as a personal computer using general-purpose spreadsheet software or the like. Separately, it is created in a table format, and CSV (C
The data is stored in an external storage medium in a predetermined file format such as an omma-separated-value format. The stored system definition data is read out by the simulation system, and the parameters and algorithms of the simulation system are dynamically determined with reference to the data to execute the simulation. Therefore, by changing the system definition data, the parameters and algorithms of the calculation formula in the simulation system can be freely changed at any time.

When the simulation logic requires a constant value, the constant data is held as a database in a simulation system, and the simulation is performed with reference to the constant data and system definition data stored in an external storage medium. Execute

[0008] The system definition data created in the form of a table by a computer includes a parenthesis field for defining parentheses of a calculation formula, an attribute field for defining an integer, a real number, a variable, and the like, and a root, n remainder, and four arithmetic operations. Calculation field. Further, a storage identification field for identifying a storage location of the value data of the item to be calculated may be included.

The simulation system processes the system definition data read from the external storage medium in the order of parentheses in the parentheses field, the root or remainder of the operation field, and the four arithmetic operations in the operation field.

The present invention can be applied to a storage medium storing a program for performing the above-described processing.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the configuration of an embodiment of the present invention, and is an example in which the present invention is incorporated and used. 2 and 3 are processing flowcharts of the data processing device 11 shown in FIG.

Referring to FIG. 1, this embodiment includes an input device 10 such as a keyboard, a data processing device 11 operated by program control, a memory 111 used when executing a program, a display device, a printing device, and the like. And a fixed storage unit (hereinafter, referred to as a “database”) 13 that stores a database as fixed data. Then, the personal computer 15 uses a spreadsheet software or the like to
System definition data (parameters and algorithms of calculation formulas in the simulation system) are created in the V format, stored in the external storage medium 14, read out of the system definition data from the external storage medium 14, and required by the data processing device 11. Run a simulation.

In the simulation system, the simulation parameters are read from the external storage medium 14 to the memory 111 and the simulation processing is executed in the data processing device 11 at the time of the simulation logic operation. The database 13 provides constant data when the simulation logic needs a constant value.

A simulation process is executed using the memory 111 of the data processing device 11 based on the constant data and the system definition data read from the external storage medium 14. The data processing device 11 starts a simulation system, reads out system definition data, reads out constant data, and executes a simulation process.

Next, the operation of this embodiment focusing on the data processing device 2 will be described with reference to FIGS. 2, 3 and 4.

The computer 15 creates system definition data in a table format for each item by using a spreadsheet software or the like by the process 21 of FIG. 2, and stores the data in the external storage medium 14 in a CSV format. FIG. 4 shows an example of a format for creating the system definition data. The spreadsheet software or the like has a format in which parameters and algorithms of the simulation can be input in advance, and items that can be input are set so as to perform an input check of only specific alphanumeric characters and symbols. The field of the item to be input will be described.

In FIG. 4, the parameter number field 31
Enter the number of data items in. The parameter information field 32 determines a parameter order (parameter number) for the number of data items. In the file identification field 33,
Specifies whether the data item is a file stored on a magnetic disk or data from a database. In this example, it is “F” for a file and “D” for a database. Database table name or file name field 3
Reference numeral 4 denotes a storage identification field for identifying a storage location of the value data of the item to be calculated. In this example, a database table name of the database or the file identified by the file identification field 33 or a file name corresponding to the file is specified. . In this example, “A” is temporarily changed to “G”. In the item name field 35, a target data item name is input. In the example of the figure, “flight time” and “fuel efficiency” are specified in the first and third lines for a simulation relating to an aircraft.

The first attribute field 36 specifies whether the data item is an integer or a real number. In this example, it is “I” for an integer and “R” for a real number. The second attribute field 37 specifies whether the data item is a constant, a variable, uses data stored in a file or a database, or specifies whether to set a value in system-defined data as a specified value. In this example, these are designated by numbers. The first operation field 38 specifies whether the operation between the data items uses the root or the n remainder. In this example, “R” is set for the route, and “N” is set for the n remainder. In the second operation field 39, identification of the four arithmetic operations is specified. In this example, the sum is “+”, the difference is “−”, the product is “*”, and the quotient is “/”. In the parenthesis field 40, the identification of the parenthesis range in the calculation formula is specified.

For example, if the data set in FIG. 4 is converted into a calculation formula based on the parameter information in the parameter information field 32, as shown in FIG. 5, “(A × √ (BC) * (D
+ (E / F)) − G ”, and substituting a specific numerical value into this, for example,“ (1 × √ (2-3) * (4+ (5 /
6))-7 ". Such system definition data is stored in the external storage medium 14 in the CSV format.

The system definition data is input to the memory 111 of the data processing device 11 at the time of the simulation logic operation by the process 20 of FIG. Next, in step 22, constant data is read from the database 13.

Next, in the actual operation processing, the priority of the operation is first the parentheses, then the first operation specified by the first operation field, that is, the root or the remainder, and then the second operation.
The second operation specified in the operation field, that is, the four arithmetic operations. The four arithmetic operations are multiplication or division first, and then addition or subtraction.

The condition under which the first operation in each parameter can be performed is that a new range restriction (first operation and parentheses) is not started in the next parameter.

First, a range limit check of the first parameter is performed by a process 23, and there is a range limit (parentheses, route, and n).
If the surplus has been started), the range restriction is started by processing 24.

Next, if there is no range limitation in the first parameter by the process 25, the data of the second operation field of the first parameter is obtained. Next, n +
A range limitation check of one parameter is performed, and if the range limitation has been started, the range limitation is started by the process 28, and the process is substituted into the n-th process waiting. If the range limit has been started, the range limit check of the next parameter is performed again by the process 26.

If the range limit has not been started (it is within the range limit or the range limit has ended), the process enters the item processing routine 27, and first, in a process 29, the operator entered by looking at the first calculation field 38. Is the root or nth power, and how long it takes for the data item,
Route processing 291 or n-th power processing 292 is performed and internally held. When the first operation field 38 is not specified,
There is no processing 293.

Next, in the process 2A of FIG. 3, the calculation order between the items is waited for the range limiting process, the order between the items is determined, and the process enters the inter-item processing routine 2B. Here, first, in the process 2C, the second calculation field 39 is searched in order to determine the calculation formula between the items. After branching to the processing for each operator, the second attribute field 37 is searched to determine whether the data used for the operation is a constant or a variable. The second attribute is "1"
In the case of (1), data to be used for calculation is extracted from the specified value field 41. When the second attribute is “2”, the file identification field 33 is searched to determine whether the data exists in the file or the database. After that, data to be used for the calculation is obtained by each data extraction process. When calculating, the first attribute field 36
When the data to be calculated is real number data, an area for handling the real number is secured in the memory 111 of the data processing device 11. Calculation by the operator searched in the second calculation field 39 is performed for each data item in each of the processes 2C1, 2C2, 2C3, and 2C4.

Next to the process between items in process 2B in FIG. 3, a process 2D performs a range limit check of n + 2 parameters.
If the current range restriction has been completed, the processing 2E
Perform the operation that has been waiting for processing due to the range restriction.

The above operation will be specifically described with reference to FIG. 5, taking FIG. 4 as an example. First, the parenthesis field 40 of the parameter number 1 and the first operation field 36 are searched. Since “1” exists in the parenthesis of item A, the parenthesis 1 starts. (Range limit brackets)

Second, the parenthesis field of the parameter number 2 and the first operation field are searched. Since “R1” exists in the first calculation field of item B, the route 1 starts. (Range limited route) Then, the process of the parameter number 1 is put into a waiting state.

Third, the second operation field of parameter number 1 is searched. The processing wait 1 is set to “A +”. 4th
Next, the parenthesis field of parameter number 3 and the first operation field are searched. In the first calculation field of item C, "R
Since “1” exists and “R1” does not exist in the first operation field of the next parameter number 4, the route processing is performed. (Range limit brackets)

Fifth, the second operation field of parameter number 2 is searched. Processing 1 is "√ (100.5-fuel efficiency)"
And Next, since “1” exists in the parenthesis field of item C and “1” does not exist in the parenthesis field of the next parameter number 4, processing waiting 1 “A +” and processing 1 “$ (10
0.5-fuel efficiency). Therefore, processing 2
Is “(processing wait 1) flight time + (processing 1) √ (100.
5-fuel efficiency). " Here, it is assumed that parenthesis 1 ends. (No limit)

Sixth, the parenthesis field of parameter number 4 and the first operation field are searched. Since the parenthesis "2" exists in the parenthesis field of the next parameter number 4 (item D), the parenthesis 2 is started. (Range limit brackets)

Seventh, the second operation field of parameter number 3 is searched. The operation of process 2 is set to a waiting state. (Waiting 3 "Processing 2 *") (Range limit bracket 2)

Eighth, the parenthesis field and the first operation field of parameter number 5 (item E) are searched. Item E
"2" is present in the parenthesis field of "." And "1" is present in the parenthesis field of the next parameter number 3, so that the processing of parameter number 4 is put into a wait state.

Ninth, the second operation field of parameter number 4 is searched. The operation in the processing waiting state is determined. (Waiting for processing 4 "D +") (Range limit bracket)

Tenth, the parenthesis field and the first operation field of the parameter number 5 (item E) are searched. Since parenthesis "3" exists in the parenthesis field of item E, parenthesis 3
Start. (Range limit brackets)

Eleventh, the parenthesis field and the first operation field of parameter number 6 (item F) are searched. Since there is no new parenthesis field and first operation field in item F, the operation is performed between parameter numbers 5 and 6.

Twelfth, the second operation field of parameter number 5 is searched. Perform processing. Processing 3 is changed to "130
/ 20 ". (Range limit brackets)

Thirteenth, the parenthesis field of the parameter number 7 and the first operation field are searched. Since the range restriction parenthesis "3" does not exist at present, the range restriction parenthesis is canceled and the range restriction parenthesis is set. (Range limit brackets)
Since there is no processing wait in the range limit parenthesis,
It does not release the waiting process. Current range limit bracket "2"
Is not present, so the range restriction bracket is removed. The processing of waiting for processing 4 is performed.

<Process 4 = (Process 4) 120+ (Process 3) 130/20> The process of Process 3 is executed. The process 5 becomes “(process wait 3) process 2 * process 4”, thereby obtaining “(flight time + √ (100.5−fuel efficiency)) * (120
+ (130/20)) ".

Fourteenth, the second operation field of parameter number 6 is searched. Since the parameter number 7 is the last parameter, there is no start of the next range restriction, so the calculation is performed. The process 6 is referred to as “process 5- (item G) 39”, which is obtained as “(flight time + √ (100.5−fuel efficiency)) * (12
0+ (130/20))-39 ". The present embodiment operates by the above-described first to fourteenth processes.

[0042]

A first effect of the present invention is that the simulation algorithm can be changed without recompiling. As a result, the time and cost of recoding and recompiling programs can be reduced,
You can freely change the algorithm of the formula at any time. The reason is that the operator, the parameter, and other information related to the processing branch are stored in the external storage device.

[Brief description of the drawings]

FIG. 1 is a block diagram of a system configuration example to which the present invention is applied.

FIG. 2 is a flowchart illustrating a simulation processing example of the present invention.

FIG. 3 is a flowchart following FIG. 2;

FIG. 4 is a diagram showing an example of system definition data created in a table format for each item in a computer and stored in an external storage medium.

FIG. 5 is a diagram showing a process performed based on the system definition data shown in FIG. 4 in a calculation formula.

[Explanation of symbols]

 Reference Signs List 10 Input device such as keyboard 11 Data processing device 111 Memory 12 Output device 13 Fixed storage unit 14 External storage medium 15 Personal computer

Claims (12)

(57) [Claims] 1. System definition data such as parameters of a calculation formula and an algorithm in a simulation system,
It is characterized in that it is created in a table format for each item by a computer, stored in an external storage medium in a predetermined file format, the stored system definition data is read out by a simulation system, and a simulation is executed with reference to this. Simulation method. 2. The file format stored in the external storage medium is C
2. The simulation method according to claim 1, wherein the simulation method is an SV format. 3. The simulation method according to claim 1, wherein constant data is held in a simulation system as a database, and the simulation is executed with reference to the constant data and system definition data stored in an external storage medium. . 4. A system definition data created in a table format by a computer includes: a parenthesis field for defining a parenthesis of a calculation formula; an attribute field for defining an integer, a real number, a variable, etc .; 4. The simulation method according to claim 1, wherein the calculation field is defined as: 5. The simulation method according to claim 4, wherein the system definition data created in a table format by the computer includes a storage identification field for identifying a storage location of the value data of the item to be calculated. 6. The simulation system according to claim 4, wherein the simulation system processes the system definition data read from the external storage medium in the order of parentheses in a parenthesis field, a root or modulo n of an arithmetic field, and four arithmetic operations in an arithmetic field. Simulation method. 7. The system definition data is read out by item from an external storage medium in which system definition data such as parameters of a calculation formula and an algorithm in the simulation system are stored in a predetermined file format by item, and simulation is performed by referring to the system definition data. A recording medium on which a simulation program for causing a system to execute a simulation is recorded. 8. The recording medium according to claim 7, wherein the file format stored in the external storage medium is a CSV format. 9. The recording medium according to claim 7, wherein the simulation program executes the simulation with reference to constant data in a database of the simulation system and system definition data stored in an external storage medium. 10. The system definition data is divided into a parenthesis field for defining a parenthesis of a calculation formula, an attribute field for defining an integer, a real number, a variable, and the like, and an operation field for defining a root, n remainder, four arithmetic operations, and the like. Claims 7 and 8
Or the recording medium according to 9. 11. The recording medium according to claim 10, wherein the system definition data includes a storage identification field for identifying a storage location of the value data of the item to be calculated. 12. The simulation program according to claim 10, wherein the simulation program processes the system definition data read from the external storage medium in the order of parentheses in a parenthesis field, a root or a remainder of an arithmetic field, and four arithmetic operations in an arithmetic field. recoding media.