JPS60142704A - Device for inputting optimum control function - Google Patents

Abstract

PURPOSE:To set an optimum control condition of a controlled system and to attain ease of the operation of the controlled system by allowing an operating device to correct the programming of the algorithm of the controlled system and applying executing processing to the corrected program so as to control optimizingly the controlled system. CONSTITUTION:An output side of a display device 1 is connected to an output section 5 of a state variable converting section 3 and a display pattern applied with the operation of a light pen 2 is converted into a state variable, which is outputted to an optimum control operating device 6. The device 6 corrects the programmaing of the algorithm of a controlled system 8 according to the inputted state variable and executes the programming so as to give a command/ operation to an operating device 7 of the controlled system 8. A detection signal being various parameters representing the state of the controlled system 8 is detected by a detector 9, its output is subjected to state conversion by an input section 4 of the converting section 3 and inputted to the device 1. Thus, the optimum control condition of the controlled system 8 is set and operated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optimal control function input device used for optimal control of plants and the like.

[Prior art]

Until now, setting the optimal operation of plants and production machinery has been done through mathematical calculations using differential equations, etc., and by comparing the voltage that indicates the previous stage's state with the current one using an analog detection circuit, it is possible to get closer to the optimal state. etc., etc.

For this reason, as the multiplicity of the control loops of the controlled object increases and the relationships between the loops become complicated, the state expression using the calculation model and the next stage condition setting become complex, and the controlled object is set to the optimum condition. The steps up to this point were complicated.

[Purpose of the invention]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an optimal control function input device that can easily set optimal conditions by improving the above-described disadvantages in optimal control of a plant or the like.

[Structure of the invention]

According to the optimal control function input device according to the present invention, the state of the controlled object is converted into a state variable and displayed as a pattern on the display, and the pattern is displayed on the display by an operator operating a display writing device such as a light ben. , is characterized in that it is configured to be converted into a state variable and used to modify the control algorithm within the arithmetic unit.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be explained below with reference to the illustrated embodiments. #! 1
As shown in the figure, a detection device 9 is connected to the controlled object 8, and this detection device 9 detects parameters indicating the state of the controlled object 8 and converts state variables @S connected to the next stage.
Output to.

The state variable conversion section 3 is composed of an input section 4 and an output section 5,
Parameters from the detection device 9 are converted into state variables by the input section 4 and output to the display device 1. The display device 1 includes a CRT display section and is configured to display input signals in a pattern.

In this way, the display device 1 that has input the state variables,
This state variable is made into a pattern and displayed on the CRT.

The display device 1 is equipped with a light ben 2 which is a display writing device, and can perform operations such as writing and selection on the pattern displayed on the display device 1.

The output side of the display device 1 is connected to the output section 5 of the state variable conversion section 3, which converts the display pattern operated by the light bench 2 into state variables and outputs them to the optimum control calculation device 6.

The optimal control arithmetic unit 6 modifies the programming algorithm of the controlled object 8 according to the input state variables, executes this programming, and instructs and operates the operating device 7 of the controlled object 8.

[For production]

In the above configuration, the detection signals, which are various parameters representing the state of the controlled object 8 detected by the detection device 9, are converted into state variables by the input section 4 of the state variable conversion section 3 and input to the display device 1. do.

Here, when a pattern of state variables is displayed as exemplified on display device 1 in figure w41, the coordinate P
When the control path from o to the moat is specified as shown by the solid line, the specified pattern is converted into a state variable at the output section 5 of the state variable conversion section 3 and input to the optimal control calculation device 6.

For example, suppose that the current state of the plant U (temperature, etc.) is point Po in FIG. 1, and X and Y are the temperatures of two points. )
, it is assumed that the pm point is the optimal point at which the ratio of substances produced in the plant is the best, based on the characteristics of the material of the plant (chemical reaction rate with respect to temperature, etc.). At this time, find the path with the steepest gradient in the constant melting system in the diagram connecting points with equal ratios in each state, and follow the path from Po to pm from the table.

(5) Therefore, input this path into the Light Ben 2, calculate the coordinates of the X and Y points from the input values, and calculate the operation input that gives the X and Y angles to the controlled object 8 such as a plant. I'll add it to.

In the optimal control arithmetic unit 6, a polynomial % expression % or an expression having a term expressed by a transcendental function is programmed into the polynomial program 10.
Operated by Light Ben 2) (From the state variable representing the turn (XO2α・1.α2...).

Parameters such as Buddha and Yu are determined by high-order multidimensional equations or sequential calculations.

Similarly, the rational expression program 11 has built-in rational expressions as programs, and these parameters, β1. ...P°゛βL and r
, γ, ..., r, etc. are the previous α. ,al,...
....

12 m α. etc., is derived from the time series of output Y1 derived from this. N(Z) is the optimal control mourning IF (
is) is an elementary pulse transfer function.

In this way, a formula is determined in real time from the operated pattern display image, and an operation command is sent to the operating device 7 to control the controlled object 8.

Here, there is no need to rewrite the entire program, just the program that executes the rational expression. For example, when controlling the temperature by changing the operation amount of a heater in a certain plant, η = β. Input + β1 It is calculated by the formula.Actually, in the arithmetic unit of this device, β., β
It recalculates the value of 1..., and in that sense it changes the program.

The optimum control calculation device 6 is composed of an input part for state variables (plant temperature, pressure, etc.), a calculation part that calculates the pulse transfer function N(Z) using the values, and an output part to the operating end. , a calculator such as a microcomputer can be used as the arithmetic unit.

According to this device, the accuracy is slightly lower than the strictly mathematically calculated path from Po to Fortune, but it can be used when the figure on the display device 1 becomes more complex, or especially when there are many mountain peaks. However, it is also reasonable to use purely mathematical methods.

Furthermore, instead of finding the shortest path from Po to the turtle, if we add conditions such as the way the state changes when reaching the bird from Po to the bird due to the constraint on high temperature, we can get P in pure mathematics. If you want to calculate the path from to a, you must formulate this and prove that the model is correct.

On the other hand, according to the apparatus of this embodiment, the operator compares the operating status up to now with the pattern on the display device 1 and, for example, P. From experience or learned intuition, it is possible to obtain very good results by moving a slightly to the right of the steepest route.

〔Effect of the invention〕

The embodiment of the optimal control function input device according to the present invention is as described above, and can bring about the following effects.

It is possible to easily set optimal control conditions for a controlled object such as a plant, which is composed of multiple control loops, and to easily operate the controlled object.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a block diagram showing an example of a program in the optimum control calculating section. 1...Display device 2...Light pen 3...State variable converter 4...Input section 5...Output section 6...・Optimal control calculation device 7... Operating device 8... Controlled object 9
...Detection device 10 ... Polynomial program 11 ... Rational formula program

Claims (1)

[Claims] In a control system that detects changes in the state of a complex controlled object such as a plant or production machine and performs optimal control, there is provided a display unit that displays input data in a pattern on a display; a display writing device capable of operating a displayed pattern display; converting the state of the controlled object into a state variable and outputting it to a display unit; and converting the pattern display operated by the display writing device into a state variable. and a state variable converter that outputs the state variables to an arithmetic unit, and the arithmetic unit modifies the program programming of the algorithm of the controlled object according to the state variables inputted from the state variable converter, and converts the modified program. An optimal control function input device, characterized in that it is configured to perform execution processing to optimally control the control target.