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Advanced control method and system for complex lagged process

An advanced control and hysteresis technology, applied in general control systems, control/regulation systems, automatic control, etc.

Inactive Publication Date: 2006-11-15
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Abstract
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Problems solved by technology

[0015] The main purpose of the present invention is to provide an advanced control method for a complex hysteresis process. Aiming at the deficiencies of the existing pure hysteresis process control methods, it is proposed that it is suitable for multi-variable and multi-constraint process control, especially with multiple state hysteresis and multiple input hysteresis. The production process control and optimization method solves the control problem in the complex lagging process

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  • Advanced control method and system for complex lagged process
  • Advanced control method and system for complex lagged process
  • Advanced control method and system for complex lagged process

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Embodiment Construction

[0089] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments:

[0090] See figure 1 Taking the advanced control of the top section of the main fractionation tower of the catalytic cracking unit as an example, the method of the present invention is introduced in detail: the main control parameter of the top section of the main fractionation tower of the catalytic cracking unit is the quality index of crude gasoline product (for example: dry point of crude gasoline Control, and the temperature at the top of the tower, etc.). There are three main operating methods: (1) The heat exchange three-way valve TC202 adjusts the heat transfer at the top of the tower. The three-way heat exchange valve TC202 involves three parameters: 1) measured value TC202.PV, 2) given Value TC202.SP, 3) valve position TC202.OUT; (2) adjust the reflux flow at the top of the tower through the regulating valve FC207; (3) adjust the reflux flow ...

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Abstract

An advanced control method for a complex lag process and a system for realizing the method, at least including: predicting the future value of the output of the complex lag process; predicting the current output of the process; performing online feedback correction for the process; Optimal control: Judging the calculated optimal control rate based on constraint limits, obtaining a control increment that satisfies the constraint conditions, and applying the control increment to the controlled process. According to the specific situation of the controlled process and the situation of the measuring point, the present invention selects the relevant process variable as the state variable, uses the measured state variable to calculate the optimal control rate; and calculates the optimal control by selecting the measurable disturbance variable design model prediction feedforward It realizes the feedback design of the measured state variables, increases the adaptability of the control system to the process changes and operation control changes of the controlled process, and improves the robust stability and anti-interference ability of the control system.

Description

Technical field [0001] The present invention relates to a control method and a system thereof, in particular to a complex lag process system with multiple controlled variables, multiple state variables, multiple manipulated variables, multiple measurable disturbance variables and long lag time characteristics The advanced control method and system thereof belong to the field of automatic control technology. Background technique [0002] The research and development of dynamic modelling of production process mechanism in process industry has a history of many years, involving all aspects of process industry. In the field of process industry, there are hundreds of production devices in each of petrochemical, metallurgy, chemical industry, medicine and others, which can provide the most basic platform for the application of integrated automation technology through dynamic modeling technology based on mechanism , Improve the economic efficiency and international competitiveness of en...

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Application Information

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IPC IPC(8): G05B13/04G05B11/01G05B11/00G05B13/00
Inventor 胡品慧闫峰袁璞
Owner CHINA UNIV OF PETROLEUM (BEIJING)