JP5211842B2 - Plant simulation system construction method and apparatus - Google Patents

Description

  The present invention relates to a plant simulation system construction method and apparatus for constructing a simulation system that virtually simulates an actual plant system in a plant control system.

  When building a plant control system, it is common to build a virtual system that simulates an actual system using a simulator. However, when simulating a large-scale plant, the load on the simulator to be operated increases. Therefore, according to the scale of the simulation system, for example, as disclosed in Patent Document 1, it is necessary to input a plurality of personal computers (hereinafter referred to as PCs).

  By the way, in order to construct a simulation system using a plurality of PCs, it is necessary to efficiently allocate the simulator load to the plurality of PCs, and the PC load when the simulator of the plant equipment to be simulated is executed. It is necessary to grasp. For this reason, adjustment work for trial and error and load leveling, such as checking the load status of each simulator PC after normal operation of the completed simulator PC and reassigning it if the load balance is bad Therefore, it took considerable time to construct a large-scale simulation system.

  In order to simulate an actual plant side in a plant control system, an interface (hereinafter referred to as I / F) between a controller that controls the plant and an input / output (hereinafter referred to as I / O) such as an actuator or a sensor. In the case of a remote I / O system, the location that is the node output of the transmission device on the remote I / O side must be switched to the simulator PC side. By switching to node output, the I / F was switched to the simulator PC.

  In the case of shifting from the actual system to the simulation system by changing the output allocation of the transmission system as in the above system, the output from a plurality of distributed simulator PCs is within the same transmission block (transmission minimum unit). In the case of output, since it cannot be output from a plurality of nodes due to restrictions on the transmission device, the processing is divided into a plurality of simulator PCs, which is a factor complicating the construction work of the simulation system. It was.

Japanese Patent Laid-Open No. 5-296804

  As described above, conventionally, when constructing a simulation system for a large-scale plant, when constructing a simulation system using a plurality of simulator PCs, the work of allocating plant equipment to be simulated to each simulator PC There are many cautions and trial and error factors such as leveling of load distribution and unification of transmission blocks, which complicates the construction work of the simulation system and greatly increases the man-hours for construction of the simulation system.

  The present invention has been made to solve the above-described problems, and a plant simulation system construction that enables a simulation system that simulates an actual plant to be easily constructed in a short time by a plurality of simulator PCs. A method and apparatus are provided.

METHOD plant simulation system constructed according to the present invention, a plurality of personal computers, a plant simulation system construction method of constructing a simulation system for simulating the actual plant system virtually, a simulation model programs for each plant equipment Weighting the load of each of the plurality of personal computers to be arithmetically processed, determining an assignment priority of the simulation model program to be assigned to each of the plurality of personal computers based on the weighting, and determining the plurality of the plurality of personal computers by the assignment priority in plant simulation system construction method in each base of the personal computer Ru allocate the simulation model program, said plurality Node output of the personal computer transmission device is, so as not to the same transmission block, and performs grouping regarded as one of the simulation model programs.

  According to the plant simulation system construction method according to the present invention, a simulation system simulating an actual plant can be easily constructed in a short time by a plurality of simulator PCs.

  Preferred embodiments of a plant simulation system construction method and apparatus according to the present invention will be described below with reference to the accompanying drawings. The present invention is not limited to the embodiments.

Embodiment 1 FIG.
1 is a block diagram showing a concept of a plant simulation system construction apparatus according to Embodiment 1 of the present invention. In FIG. 1, a plant simulation system construction apparatus 1 includes a plant control specification information storage unit 2 that stores the pattern specification information of equipment to be plant controlled and a control stored in the plant control specification information storage unit 2. The plant facility simulation model database unit 3 stores a simulation model program (hereinafter referred to as a simulation model) for each plant facility corresponding to the specification information of the target facility, and stores it in a database. By appropriately selecting the specified specification information of the target facility, an allocation model table unit 4 for sequentially allocating simulation models stored in the plant facility simulation model database unit 3 corresponding to the selected specification information, And a sort priority table section 5 sort defined rank the rank of allocated simulation model in the model table section 4.

  In the rearrangement priority order table unit 5, as shown in FIG. 2, for example, the program execution cycle time on the control controller side is high / low, the order of whether or not the transmission system is applied (input / output signal I / F and Depending on whether or not the controller to be controlled is connected using a transmission system, priority is given to the case where it is not applied), the order in which the transmission speed setting is fast when it is applied, and the order of weights at the time of execution (target) The order of priority for rearranging the order of simulation models is defined, such as the order of the load on the PC side when the model program is executed. The weight at the time of execution defined in the rearrangement priority table 5 is obtained by actually executing a program on the PC and measuring the actual value of the CPU load on the PC side.

  A simulation model program constructed by a method to be described later using the plant simulation system construction apparatus 1 constructed as described above is sequentially allocated to simulator PCs 6a, 6b, and 6c constituting the simulator PC6. The plant control specification information storage unit 2 stores, for example, whether the drive system of the plant is a motor or hydraulic pressure, and in the case of hydraulic pressure, whether it is servo valve control or fixed pressure valve control, the feedback system sensor signal is bit or numerical value, position Information such as detection, pressure detection, or flow rate detection is stored in a pattern. The plant equipment simulation model database unit 3 is classified into, for example, a plant drive system and a feedback system, and the type and number of actuators of the drive system, the operation speed thereof, and the type and number of sensors of the sensor in the feedback system. The plant equipment simulation model is stored in a database.

  The plant simulation system construction apparatus 1 according to Embodiment 1 is configured as described above, and then constructs a plant simulation system that virtually simulates an actual plant system using a plurality of simulator PCs. A method will be described.

  FIG. 3 is a flowchart for explaining a method for constructing a plant simulation system. In FIG. 3, first, in step S <b> 31, the pattern information of the simulation target facility is extracted from the plant control specification information storage unit 2, and the corresponding simulation model is selected from the plant facility simulation model database unit 3.

  Next, in step S32, the simulation model selected by the plant control specification information storage unit 2 is output to the allocation model table of the allocation model table unit 4 in the order of selection.

  In step S33, the simulation model assigned to the assigned model table unit 4 is rearranged according to the definition of the rearrangement priority table unit 5 including the weight when the simulation model is executed, and the model assignment order is determined. To do.

  In step S34, the simulation model assigned to the assignment model table unit 4 according to the assignment order determined as a result of the rearrangement is assigned to each simulator PC 6a, 6b, 6c constituting the target simulator PC 6, for example, the simulator PC 6a. The assignment is performed in the order of the simulator PC 6b and the simulator PC 6c.

  In step S35, the program is mounted on each simulator PC 6a, 6b, 6c according to the assigned model.

  A simulation system that simulates an actual plant system is constructed as described above.Next, when a simulation model that is newly created is applied at the time when the simulation system is constructed, the weight of the simulation model to be applied is The case where it cannot grasp | ascertain beforehand is demonstrated.

  If the weight of the simulation model to be applied cannot be grasped in advance at the time of building the simulation system, the weight data of the simulation model, that is, data such as the actual value of the CPU load on the PC when the simulation model program is executed, the processing time, etc. It is possible to obtain by actual measurement by performing the sampling process. This weight data is obtained by actually mounting the simulation model on the simulator PC, sampling the CPU actual value when executing the simulation model based on the test data, obtaining the maximum value, measuring the program processing time, and calculating the average value of the CPU load. Ask for. Next, how to obtain it will be described.

  FIG. 4 is a flowchart for explaining how to obtain weight data of a simulation model by actual measurement. In FIG. 4, all simulation models necessary for the simulation are selected and temporarily assigned to the simulator PC 6 in step S41.

  Next, in step S42, the simulation model is provisionally mounted on the simulator PC 6 according to the simulation model temporary assignment setting.

  In step S43, the simulation program is executed, and the simulation model is calculated.

  In step S44, the CPU load for each actual simulation model is measured. Then, in step S45, the load for each simulation model is weighted and factorized, and stored as table information in descending order of processing, so that weight information can be collected and prioritized when assigned. . The load weighting and coefficientization for each simulation model is to obtain the weighting coefficient for each model program from the average and maximum values of the CPU load measured for each model and the processing time during one cycle execution. Specifically, by an arithmetic expression obtained by multiplying a weighting coefficient such as 0.8 × CPU load (average value)% + 0.1 × CPU load (maximum value)% / 100 + 0.1 × processing time / 1 cycle time. Digitize.

  According to the plant simulation system construction method and the apparatus thereof according to the first embodiment, a plurality of simulation models are assigned to a plurality of simulator PCs 6a, 6b, 6c constituting the simulator PC 6 as described above. A large-scale plant simulation system using the simulator PCs 6a, 6b, 6c can be easily constructed in a short time.

Embodiment 2. FIG.
Next, a plant simulation system construction method and apparatus according to Embodiment 2 of the present invention will be described.

  The plant simulation system construction apparatus according to the second embodiment is the same as that in FIG. 1 of the first embodiment, and a description thereof will be omitted. FIG. 5 is a flowchart for explaining a construction method of the plant simulation system according to the second embodiment. Note that FIG. 1 is referred to when explaining the flowchart of FIG.

  In FIG. 5, in step S 51, pattern information of the simulation target facility is extracted from the plant control specification information storage unit 2, and a corresponding simulation model is selected from the plant facility simulation model database unit 3.

  Next, in step S52, a grouping process is performed so that the node outputs of the transmission devices of a plurality of simulator PCs are regarded as one simulation model so as not to be the same transmission block (the transmission unit of the transmission device). In S53, the data is output to the allocation model table of the allocation model table unit 4. This grouping process is performed in order to avoid assigning output from two or more different simulator PCs to the same transmission block in the memory on transmission. This is a process in which the simulation model is regarded as one simulation model. Specifically, the value having the highest priority among the items in each column of the sorting priority table section 5 possessed by a plurality of simulation models to be set to the same transmission block is determined and assigned as the value of the grouped simulation model. By outputting to the model table unit 4, one simulation model is obtained.

  Step S54 and subsequent steps are the same as those in the first embodiment. That is, in step S54, the simulation models assigned to the assigned model table unit 4 are rearranged in accordance with the definition of the rearrangement priority table unit 5 including the weight when the simulation model is executed, and the order of model assignment is determined. To decide.

  In step S55, the simulation models assigned to the assigned model table unit 4 according to the assigned assignment order as a result of the rearrangement are assigned to the respective simulator PCs 6a, 6b, 6c constituting the target simulator PC 6, for example, the simulator PC 6a, simulator. The assignment is performed in the order of the PC 6b and the simulator PC 6c.

  In step S56, the program is mounted on each simulator PC 6a, 6b, 6c according to the assigned model.

  As described above, according to the plant simulation system construction method and apparatus therefor according to the second embodiment, the effects of the first embodiment can be obtained, and a plurality of PCs 6a, 6b, and 6c can be used at the time of model assignment to the simulator PC6. Therefore, it is possible to construct a large-scale plant simulation system using a plurality of simulator PCs 6a, 6b, and 6c without output to the same transmission block.

It is a block diagram which shows the concept of the plant simulation system construction apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows an example of the rearrangement priority table part used for the plant simulation system construction apparatus concerning Embodiment 1 of this invention. It is a flowchart explaining the construction method of the plant simulation system which concerns on Embodiment 1 of this invention. It is a flowchart explaining how to obtain weight data of a simulation model by actual measurement. 5 is a flowchart for explaining a construction method of a plant simulation system according to a second embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Plant simulation system construction apparatus 2 Plant control specification information storage part 3 Plant equipment simulation model database part 4 Allocation model table part 5 Rearrangement priority order table part

Claims (2)

A plant simulation system construction method for constructing a simulation system that virtually simulates an actual plant system with a plurality of personal computers ,
Weigh the load on each of the multiple personal computers that compute the simulation model program for each plant facility,
Determine the allocation priority of the simulation model program to be allocated to each of the plurality of personal computers based on the weighting,
In pulp plant simulation system construction method allocate the simulation model program in each of the above plurality of personal computers by the assignment priority,
A plant simulation system construction method, wherein grouping is performed so that the node outputs of the transmission apparatuses of the plurality of personal computers are regarded as one simulation model program so as not to be the same transmission block . A plant simulation system construction device constructed by a plurality of personal computers as a simulation system for virtually simulating an actual plant system ,
A plant control specification information storage unit for storing the specification information of the plant subject to plant control in a pattern;
A plant equipment simulation model database unit that stores a pattern of a simulation model program for each plant facility corresponding to the specification information of the control target facility stored in the plant control specification information storage unit, and stores it in a database.
Allocation by sequentially assigning simulation model programs stored in the plant equipment simulation model database section corresponding to the selected specification information by appropriately selecting the specification information of the target equipment patterned in the plant control specification information storage section A model table section;
A simulation model grouping processing unit for grouping a plurality of simulation model programs of the same transmission block;
A rearrangement priority table for rearranging the order of the simulation model program assigned to the assigned model table in the order defined by the execution speed of the simulation model, the transmission speed of the assigned transmission block, and the load weight at the time of execution ; ,
Equipped with a,
The plant control specification information storage unit performs grouping that considers a single simulation model program so that node outputs of the transmission devices of the plurality of personal computers do not become the same transmission block. Construction device.

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