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Visual process control system configuration simulation method

A process control system, configuration simulation technology, applied in general control systems, control/regulation systems, instruments, etc., can solve the lack of pure software process control simulation experiment platform, no control principle visualization function, and long secondary development time and other problems, to achieve the effect of reducing the workload of research and development, convenient operation and rich variety.

Inactive Publication Date: 2015-05-20
CENT SOUTH UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

The process control platform is mainly some monitoring software. Although it provides a visual monitoring interface, which can simulate the industrial system very intuitively and vividly, it can only perform simple mathematical operations, parameter setting, and check the system operating status. The control algorithm is single. And without the visualization of the control principle
Since most of the software is not open source software, the secondary development of the system takes a long time, which limits its application
[0004] Matlab is a powerful simulation software integrating algorithm development, data visualization, data analysis and numerical calculation, but its interface is monotonous and lacks a visual description of each link of the actual process control system
However, the development of industrial process simulation experiment platform based on Matlab is mostly designed and developed on the basis of PLC or DCS hardware system, and there is a lack of pure software process control simulation experiment platform.

Method used

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  • Visual process control system configuration simulation method
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  • Visual process control system configuration simulation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A flow chart of a visual process control system configuration simulation method based on VC++ and Matlab mixed programming is shown in figure 1 ; Take the single-loop water tank liquid level fuzzy control system as an example, use this system to control the water tank liquid level, and realize the simulation operation using this control system simulation.

[0051] First, in the figure 2 In the new project configuration diagram, the virtual object water tank w6 is established, which is a second-order system, and the transfer function of the second-order system is:

[0052] Secondly, in the schematic diagram, build the system control block diagram, the input signal is a square wave, the period is 62 seconds; the output is the corresponding tracking square wave, and the controller is a fuzzy controller.

[0053] The fuzzy controller is the core of the control system. It has two inputs and one output. The two inputs are the error and the actual output of the system; one...

Embodiment 2

[0060] Taking the single-loop water tank liquid level PID control system as an example, using this system to control the liquid level of the actual water tank object shows that the system can also be used for the control simulation of the actual system.

[0061] First, according to Figure 4 Connect the tank level control system hardware. The shape of the actual water tank is an inverted conical truncated top and a cylindrical bottom, R=275mm, r=50mm, H 1 =500mm,H 2 =155mm, the frequency converter at the water inlet is the actuator, and the opening of the solenoid valve at the water outlet is fixed at 25.

[0062] Secondly, create a new project configuration diagram according to the hardware connection system, such as Figure 5 .

[0063] Again, in the schematic diagram, build the system control block diagram, the initial input setting w3 = 400, the controller w2 selects the PID controller, the PID controller parameters P = 20, I = 1, D = 1, after the limit of the controll...

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Abstract

The invention discloses a visual process control system configuration simulation method. The method includes the steps of firstly, establishment of a configuration graph and a schematic diagram by selecting a virtual object component from a component library to establish the configuration graph used for simulating an actual device, selecting a virtual object control from a control library to establish the schematic diagram used for characterizing a process control system chart, binding the virtual object component in the configuration graph and the virtual object control in the schematic diagram, and binding a graph corresponding to the virtual object control in the schematic diagram and a file M or a Simulink module serving as a background simulation support; and secondly, simulation run by starting an Matlab engine, generating simulation data and displaying a control result in the configuration graph. The visual process control system configuration simulation method is capable of performing on-line or offline simulation for the process control system described by the configuration graph according to the visual schematic diagram, has the advantages of simplicity and convenience in operation and high simulation efficiency and is capable of well simulating production conditions of an industrial process control system.

Description

technical field [0001] The invention relates to a configuration simulation method of a visualized process control system. Background technique [0002] The process control object has the characteristics of large volume, high energy consumption, large pollution, etc., and has complex characteristics such as multivariable, nonlinear, strong coupling, serious interference, and frequent changes in working conditions. Therefore, it is very difficult to truly simulate the entire process control system. . With the rapid development of automation and informatization, the demand and development of simulated industrial process control experiment systems have been promoted. [0003] At present, most industrial process control systems are simulated for specific processes in specific domains, lacking versatility and scalability. The process control platform is mainly some monitoring software. Although it provides a visual monitoring interface, which can simulate the industrial system v...

Claims

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Application Information

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IPC IPC(8): G05B17/02
Inventor 吴敏曹卫华王芳安剑奇何勇王冠华
Owner CENT SOUTH UNIV
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