Interval prediction control modeling and optimizing method based on soft constraints
A technology of predictive control and optimization method, which is applied in the direction of adaptive control, general control system, control/regulation system, etc., and can solve problems such as inability to realize real-time control, limited solution, large amount of calculation, and difficulty in application
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[0047] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0048] Take the three-input and three-outlet system of the heavy oil fractionation tower of Shell Petroleum as an example. Process MV: u 1 Represents the extraction rate of the top product of the fractionator; u2 Represents the withdrawal rate of the fractionator side product; u 3 Represents the reflux heat load at the bottom of the fractionator. CV of the process: y 1 represents the extracted fraction of the overhead product of the fractionator; y 2 Represents the extracted component of the fractionator side product; y 3 Represents the reflux temperature at the bottom of the fractionator. Take the number of prediction steps as 20 and the number of control steps as 10.
[0049] 1. Construct the constraint item index J that restricts the oil extraction rate of the heavy oil fractionation tower 1
[0050] The CV interval constra...
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