Multi-strategy composite control method for moisture of tobacco at outlet of tobacco redryer

Abstract

The invention discloses a multi-strategy composite control method for moisture of tobacco at an outlet of a tobacco redryer. According to the method, a multi-strategy composite control server and a PLC (programmable logic controller) system are used, multiple control strategies are automatically coordinated and used, and moisture of the tobacco redryer is controlled within a given range; according to the method, control tasks are decomposed into three layers, the first layer is mainly responsible for solving the problems about prediction, decoupling and multivariable coordination; the second layer has a main function that compensation is performed by means of a feedback function and the response speed is properly increased when the control effect is reduced because of model mismatch of the first layer and the like; the third layer has a main function that a manipulated variable is adjusted to be close to a target value in a shortest time by a substantial adjustment means when the deviation between the manipulated variable and the target value is relatively large. The moisture of the tobacco redryer is automatically controlled, the on-field process control capability is improved, and the tobacco redrying processing quality is integrally improved.

Description

technical field [0001] The invention discloses a multi-strategy composite control method and system for controlling the moisture content of tobacco leaves at the outlet of a tobacco leaf redrying machine, and in particular relates to an advanced control method for controlling the moisture content of tobacco leaves at the outlet of a tobacco leaf redrying machine on a threshing and redrying production line. belongs to the field of tobacco processing, Background technique [0002] Tobacco redrying is a sorting and preparatory process for transforming tobacco leaves from agricultural products to raw materials for industrial production, and it is a very important link in the overall processing of tobacco. The main purpose of tobacco rebaking is to process the tobacco leaves after threshing and separation, so that the moisture and temperature of the leaves can reach the specified technological indicators. Tobacco re-drying machine is mainly divided into drying section, cooling s...

AI Technical Summary

Problems solved by technology

[0018] The first purpose of the present invention is to provide a multi-strategy compound control method for the moisture content of tobacco leaves at the outlet of the tobacco redrying machine. It decomposes the control task into three layers, and the first layer is mainly responsible for solving prediction, decoupling and multivariate coordination. problem; the function of the second layer is mainly to use the feedback function to compensate when the control effect drops due to model mismatch and other reasons in the first layer, and to appropriately increase the response speed; When the value deviation is large, use a large adjustment method to adjust the controlled variable back to the target value in the shortest time

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