Control method applied to threshing and redrying production line

A control method, a technology for threshing and re-baking, which is applied in the directions of adaptive control, general control system, controller with specific characteristics, etc., which can solve the problems of complex mechanism model, inability to guarantee control accuracy, and difficulty in achieving closed-loop automatic control.

Inactive Publication Date: 2010-03-17
DONGHUA UNIV
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Problems solved by technology

Changes in temperature and humidity in any section of different processes will affect the changes in the parameters of each section and the moisture content of the exported tobacco leaves, which makes the establishment of the system's mecha

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  • Control method applied to threshing and redrying production line
  • Control method applied to threshing and redrying production line
  • Control method applied to threshing and redrying production line

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Embodiment Construction

[0057] Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0058] The implementation of the invention includes: discretization of algorithms, manual and automatic switching, programming language implementation, laboratory simulation, parameter setting of control algorithms and on-site debugging. Due to the use of the key step of laboratory simulation, once the algorithm is downloaded and installed, it can be directly controlled. In addition to the optimization of control parameters, th...

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Abstract

The invention relates to a control method applied to a threshing and redrying production line, providing a predictive PI controller based on a model. The control method is composed of a PI control item and a predictive control item. Based on a flue-curing barn temperature object, four flue-curing barn temperature controllers are designed by an advanced predictive PI control algorithm, thus avoiding the problems of low regulation speed and big fluctuation of the traditional PID control algorithm; based on a cooling room generalized moisture object and an outlet generalized moisture object, thecooling room moisture control scheme and the outlet moisture control scheme are respectively designed by adopting self-adaption anti-interference pseudo prediction PI control algorithm, thereby greatly improving control precision and enterprise economic benefit. The invention has the advantages that the control method is a control algorithm based on the model, and the PI control item can improve controller robustness; the predictive control item can predict future control function according to the control function in a certain past period, eliminating control blindness, and ensuring that the production is totally in autocontrol in the closed loop mode.

Description

technical field [0001] The invention belongs to the technical field of process control, in particular to a control method applied to a leaf threshing and redrying production line. Background technique [0002] The main purpose of tobacco redrying is to treat the tobacco leaves after threshing and separation, so that the moisture and temperature of the leaves can reach the specified technological indicators. Tobacco rebaking production line is mainly divided into drying section, cooling section and moisture regaining section according to the process characteristics. The drying section is divided into four zones, the cooling section is divided into one zone, and the moisture regaining section has two zones. [0003] Compared with other processes in the process industry, the redrying process of tobacco leaves has its obvious characteristics, which is a process with multiple disturbances, strong coupling, large lag, nonlinearity, and uncertainty with large heat capacity. Change...

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Application Information

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IPC IPC(8): G05B13/04G05B11/42
Inventor 任正云魏俊红李松
Owner DONGHUA UNIV
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