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Optimum control system and method of industrial process with dual-layer optimization

An industrial process, double-layer optimization technology, applied in the direction of comprehensive factory control, comprehensive factory control, electrical program control, etc., can solve problems such as inaccurate calculation and low solution efficiency

Inactive Publication Date: 2010-12-01
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the existing penalty function method when dealing with the boundary value fixed optimal control problem, there will be ill-conditioned phenomena, inaccurate calculation, and low solution efficiency, the present invention provides a method that can accurately and quickly find the boundary value fixed problem An optimal control system and method for an industrial process with double-layer optimization with high stability and wide applicability

Method used

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  • Optimum control system and method of industrial process with dual-layer optimization
  • Optimum control system and method of industrial process with dual-layer optimization
  • Optimum control system and method of industrial process with dual-layer optimization

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Embodiment 1

[0143] refer to figure 1 , figure 2 , a double-layer optimized industrial process optimal control system, including field intelligent instrument 2 connected with industrial process object 1, DCS system and host computer 6, said DCS system consists of bus interface 3, control station 4 and database 5 Composition; field intelligent instrument 2, DCS system, host computer 6 are connected in sequence through field bus, and described host computer includes:

[0144] The signal acquisition module is used to set the sampling time and collect the dynamic information of the industrial process object uploaded by the on-site smart instrument;

[0145] The initialization module is used for the setting of initial parameters, the discretization and initial assignment of the decision variable z(t), and the specific steps are as follows:

[0146] (3.1) The time domain [0, t f ] is evenly divided into N segments: [0, t 1 ], [t 1 , t 2 ],...,[t N-1 , t N ], where t N = t f ; The leng...

Embodiment 2

[0212] refer to figure 1 with figure 2 , a kind of optimal control method of industrial process of double-layer optimization, described optimal control method is implemented according to the following steps:

[0213] 1) Specify the state variables and control variables in the DCS system, and set the upper and lower boundaries of the control variables u according to the conditions of the actual production environment and operating restrictions max , u min and the sampling period of the DCS, and the historical data of the corresponding variables in the DCS database 5, the upper and lower boundary values ​​of the control variables u max , u min Send to the upper computer 6; In the information collection module 7 of the upper computer, set the sampling time, collect the data of the industrial process object that the on-site smart instrument inputs, save in the real-time database 5 of the DCS system, and in each sampling cycle will The latest data obtained by the database 5 of...

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Abstract

An optimum control system of industrial process with dual-layer optimization comprises a field intelligent instrument connected with an industrial process object, a DCS system and an upper computer; the industrial process object, the field intelligent instrument, the DCS system and the upper computer are connected in turn; the upper computer comprises a signal collection module, an initializing module, a constraint conversion module and a dual-layer optimization module. The invention further provides an optimum control method of industrial process with dual-layer optimization, which converts the optimum control problem with boundary fixing constraint through a dual-layer plan strategy into a dual-layer optimization problem, to carry out iterative optimization. The invention can precisely work out the optimum control problem of industrial process with boundary fixing feature, with stable and effective solution and good precision. It is an optimum control system and method with wide application.

Description

technical field [0001] The invention relates to the field of industrial process control, in particular to a double-layer optimized industrial process optimal control system. Background technique [0002] With the increasing demand for online optimal control in industrial processes, it has become more and more important to improve the solution performance of optimal control algorithms and improve the computational efficiency and accuracy of their online applications. [0003] The optimal control problems of industrial processes often have fixed constraints on the boundary values ​​of state variables, such as constraints on valves, reactor capacity, pressure, and mole fraction. Therefore, the fixed boundary value problem is a frontier and hot spot in the research of optimal control of industrial processes. [0004] Penalty function method is a common strategy to deal with the problem of fixed boundary value. It adds penalty function items on the basis of the original objectiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/418
CPCY02P90/02
Inventor 刘兴高陈珑
Owner ZHEJIANG UNIV