JPS59186008A - Method of analysis of automatic controlling system - Google Patents

Abstract

PURPOSE:To enable efficient analysis by storing an automatic controlling system as divided into levels of the whole and the equipment and parts constitution, storing connection between levels, inputting condition of analysis and solving simultaneous equations and displaying the result. CONSTITUTION:Block diagram information of strata type that makes the automatic controlling system into level units of the whole and the equipment and parts constitution is inputted from a data inputting device 101, and arranged and stored in the table of a computer 103. The block diagram information is reedited by extracting elements of the object of operation and stored as interrelation table between elements. The relation between elements is converted to simple simultaneous equations from the kind of operation defined to the elements and information of connected elements. Condition of analysis is given to the equations and operated, and the solution is prepared as a table of result of operation, and displayed on a display device 102 as a step response table diagram according to given condition of display. As this constitution gives result of analysis simply by giving optional condition of analysis, analysis of the automatic controlling system can be made efficiently.

Description

[Detailed description of the invention] [Field of application of the invention] The present invention relates to an automatic control system analysis method.

[Prior art]

Conventionally, so-called general-purpose simulators are known as automatic control system analysis devices. In recent years, conversational simulators using CR, T display devices have been used. However, in the description of the control system (program knob) of conventionally known simulators,
The entire control system is uniformly programmed. this is,
When attempting to correct a part of an automatic control system or when attempting to analyze various similar control systems, it is necessary to program and store the entire system individually.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide an automatic control system analysis method that can efficiently analyze automatic control systems.

[Summary of the invention]

In the present invention, when describing an automatic control system, the description is made in units of appropriate functional blocks, and various control systems are constructed by combining each of these functional blocks, that is, constituent elements. Even in the block diagram of a large control system,
Its components can be grouped according to certain functions. If you create a higher level screen where one group is one element and create relationships between groups,
The configuration of the entire automatic control system becomes easier to understand. Also, if there are multiple identical components, consider them as one component,
By creating a lower-level screen that describes the element in detail, it can be used in multiple locations like a subroutine in a computer program.

Based on this idea, the present invention divides the block diagram of the automatic control system into a plurality of levels, has a functional program for each level, and enables data analysis at any level as needed.

By decomposing the data into multiple levels, in other words by creating a hierarchical structure, it becomes easier to input information into the automatic control system for analysis. However, on the other hand, when analysis is performed based on this information, the index of connection relationships between each component becomes complicated. In the present invention, in order to improve this point, instead of starting the analysis directly from the input automatic control system information, a relationship table is created to view the relationship between each element at the same level.

[Embodiments of the invention]

Figure 1 shows an overall diagram of the automatic control system analysis device.

101 is a data input device, a block diagram of the automatic control system, various setting conditions necessary for calculation, and resultsㅅ)
It is used to input data such as conditions related to graph display into the computer 103.

102 is a display device, 104 is an operation key 1, a total of 103,! :Used for man-machine communication.

The block diagram of the automatic control system inputted from the data input device 101 is, for example, a hierarchical diagram as shown in FIG.

In this example, there are three hierarchies. The first reference is a block diagram of the entire automatic control system, and is used to understand the entire control system to be analyzed. The second level describes in detail one element of the husband of the second rubel. The third level is provided for elements included in the second level that require more detailed description. Each third level element is available to multiple second level elements.

The block diagram information is organized and stored in a table. As shown in FIG. 3, the table 5 is divided into a system level table 1, a page level table 2, and an element level table 3. System level table 1
In Table 2 at the page level, the entire control system to be handled is the object of operation, in Table 2 at the page level, each screen representing that system is the object to be operated, and in Table 3 at the element level, each element included in one screen is the object to be operated. shall be. In addition, these 1
A system management table 41 and an empty area management table 42 for managing the tables 3 to 3 are also created. The element level table 3 stores all information necessary for restoration, such as the position, type of element, and number of related elements, for each element. Page level table 2 contains
Stores the starting address of all element information tables included in one screen, its size, and the name associated with that screen.

Page-level and element-level tables are part of a single control system (
(1 system) unit in a contiguous area in external memory. The system level table l handles the information that is to be put in and out of the work area one by one from among a number of pieces of control system information stored in external memory, and one section of the table contains one system's worth of external information. Stores the size of the first address in memory, the name given to the control system, etc. The empty area management table 42 stores the starting address and size of the empty area in the external memory. In a hierarchical block diagram, each screen has a hierarchy, but in an information table, one screen is considered to be one page, regardless of the hierarchy. The hierarchy is distinguished by the page name.

The procedure for analyzing and displaying the results based on the information in the block diagram is shown in FIG. First, from the block diagram information table 5 created as described above, the calculation target elements in the page belonging to the second and third levels are extracted and re-edited, and the relationships between them are set to the same level and the relationships between them are determined by the inter-element relationships. Stored as table 6. Next, from the type of operation defined for the element and the information on the connected elements, the relationship between the elements is calculated using a linear equation (
Tablo's equation). This corresponds to the step of simultaneous equation conversion 7. To derive this equation, the linear one-step method is used for the dynamic elements, and the Newtonian method is used for the nonlinear elements.
Use the Lavnon method. Equation conversion is performed on all elements, and the entire equation is made into simultaneous-order equation 7. To solve the simultaneous order equations, the LU decomposition method 8, which is a high-speed calculation method, is used, taking advantage of the high sparsity of the coefficient matrix. This solution is created as a calculation result value table (step 9) and displayed as a step response table diagram according to the given display conditions - Also, this table is scaled (step i 0 ) l, step response diagram according to the operator's instructions. Display as .

In this example, the block diagram has three levels and the second level screen is provided, which makes it easier to understand the relationship between the second level drawings. Furthermore, by providing the third level, the drawings in the second to fourth levels can be simplified and made easier to read. Additionally, the number of pages can be saved because third level drawings can be assigned to multiple second level elements. Regarding calculations, rather than tracing the elements of the block diagram one by one, the entire system was converted into simultaneous equations and matrix calculations were performed all at once, resulting in faster calculations.

FIG. 5 shows a summary of each processing procedure of the above-described embodiment. First, the overall system configuration is stored in the computer as the first memory 51, then the device configuration is stored as the memory 52, and further the component configuration is stored as the memory 53.

These correspond to the above-mentioned level, second level, and third level, respectively. Subsequently, using these data 51 to 53 (actually stored as a table as shown in FIG. 3), relational matrix arrangement 54 is performed. This arrangement is stored as the fourth memory 55 in preparation for analysis calculations.

When the analysis conditions are input, the arithmetic processing 56 is performed by applying the analysis conditions to the contents of the fourth memory. This operation is
It solves simultaneous equations. The result of this calculation is displayed on the display 57 automatically or according to instructions from the operator.
A hard copy 58 of the results is made.

〔Effect of the invention〕

According to the present invention, information at each level of an automatic control system is stored as a hierarchical structure, and the relationships among these are determined and stored, and calculation results ( Since the analysis result) can be obtained, the automatic control system can be analyzed efficiently.

[Brief explanation of the drawing]

Figure 1 is a diagram showing an automatic control system analysis system, Figure 2 is a diagram to explain the block diagram description in a hierarchical display, and Figure 3 is a table that stores information at each level of the automatic control system. FIGS. 4 and 5 are diagrams for explaining the analysis processing procedure in the present invention. 5... Create hierarchical block diagram element information table, 6
... Creation of inter-element relationship table, 7. Conversion to simultaneous equations, 8. Matrix calculation, 9. Creation of calculation result table, 51-53.. First to third storage, 54.
Tsuji 11 Flute 2B

Claims (1)

[Claims] 1. A method for analyzing an automatic control system. The overall configuration of the control system, the device configuration within that overall configuration,
The device is divided into levels of component configuration and stored, and the connection relationships between devices and components at each level are stored as a relational matrix arrangement.When performing an analysis, input the analysis conditions and perform the above steps. 1. A method for analyzing an automatic control system, which comprises solving simultaneous equations using stored data, calculating an analysis result, and outputting the result to an external display means.