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Plant control system

A technology of equipment control and equipment, applied in the direction of program control, electrical control, mechanical equipment, etc., can solve problems such as excessive response deterioration, control instability, etc.

Active Publication Date: 2019-07-16
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual control, there are often constraints on the value of the control output due to hardware or control constraints
If the control system is designed with this constraint ignored, it may result in exacerbation of overresponse and / or destabilization of control

Method used

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Experimental program
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Effect test

no. 1 approach

[0083] First, refer to Figure 1 to Figure 8 A first embodiment of the present invention will be described.

[0084]

[0085] figure 1 It is a diagram showing the target value follow-up control structure of the facility control device according to the first embodiment. The facility control device includes a provisional target value calculation unit 2 , a reference regulator (RG) 3 , a comparison unit 4 , and a feedback controller 5 . For example, a microcomputer such as an electronic control unit (ECU) functions as an equipment control device.

[0086] exist figure 1 A portion enclosed by a dotted line in , functions as a closed-loop system 10 that performs feedback control so that the control output y approaches the target value wf. After the closed-loop system 10 is designed, by figure 1 The target value tracking control structure of is obtained by equivalent deformation figure 2 The structure of the feedforward control. In addition, although a plurality of stat...

no. 2 approach

[0143] The configuration and control of the device control device in the second embodiment are basically the same as those of the device control device in the first embodiment except for the points described below. Therefore, the second embodiment of the present invention will be described below focusing on the parts different from the first embodiment.

[0144] In the second embodiment, the reference regulator 3 will correct the initial value w of the target value w 0 Set to r-0.5R r . r is the temporary target value, R r is the value of the partial differential of the objective function when the corrected target value w is the temporary target value r. R r It is obtained by substituting r into w on the right side of the above formula (16).

[0145] Figure 9 and Figure 10 It is a diagram for explaining the update method of the correction target value in the second embodiment using a graph showing the partial differential of the objective function. exist Figure 9 a...

no. 3 approach

[0177] The configuration and control of the device control device in the third embodiment are basically the same as those of the device control device in the first embodiment except for the points described below. Therefore, the third embodiment of the present invention will be described below focusing on the points different from the first embodiment.

[0178] In the third embodiment, the reference regulator 3 will correct the initial value w of the target value w 0 Set to r-0.5R r and a predetermined value between r. r is the temporary target value, R r is the value of the partial differential of the objective function when the corrected target value w is the temporary target value r. R r It is obtained by substituting r into w on the right side of the above formula (16).

[0179] Figure 15 ~ Figure 18 It is a diagram for explaining the update method of the correction target value in the third embodiment using a graph showing the partial differential of the objective ...

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Abstract

A plant control system comprises a feedback controller 5 configured to determine a control input of a plant 6 so that one control output of the plant approaches a target value, a provisional target value calculating part 2 configured to calculate a provisional target value based on a predetermined parameter of the plant, and a reference governor 3 configured to perform a minimum value search of anobject function by updating a corrected target value to thereby derive the target value from the provisional target value. The reference governor is configured to update the corrected target value only between r-0.5Rand ''r''. Ris a value of a partial differential for the corrected target value ''w'' of the object function when the corrected target value ''w'' is the provisional target value ''r''.

Description

technical field [0001] The present invention relates to equipment control devices. Background technique [0002] In a plant to be controlled, feedback control is performed so that a control output approaches a target value. However, in actual control, there are often constraints on the value of the control output due to hardware or control constraints. If the control system is designed while ignoring this constraint, deterioration of excessive response and / or destabilization of control may occur. [0003] As a means for improving constraint satisfaction, a reference governor is known (for example, Patent Documents 1 and 2). The reference regulator corrects the provisional target value calculated based on the predetermined parameters of the plant in consideration of constraint satisfaction, and derives the target value of the control output. Specifically, the reference regulator derives the target value by performing a minimum search of a predetermined target function. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D45/00
CPCF02D45/00F02D41/1406F02D43/00F02D41/0007F02D41/0047G05B13/042F02D2041/141F02D2041/1419Y02T10/12Y02T10/40G05B13/0265G05B13/024G05B11/42F02D41/1401F02D41/021G05B13/04G05B2219/32297G05B19/4155
Inventor 仲田勇人
Owner TOYOTA JIDOSHA KK
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