Decoupling control method and system for temperature field regional control system

A partition control and decoupling control technology, which is applied in the direction of temperature control using electric mode, auxiliary controller with auxiliary heating device, etc., can solve problems such as difficult decoupling and complex decoupling algorithm

Inactive Publication Date: 2015-08-26
CENT SOUTH UNIV
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Problems solved by technology

However, in actual engineering, it is often difficult to achieve better decoupling due to the complexity of the

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  • Decoupling control method and system for temperature field regional control system
  • Decoupling control method and system for temperature field regional control system
  • Decoupling control method and system for temperature field regional control system

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0032] In order to apply the method and system for decoupling control of the temperature field partitions proposed in the present invention, a chip curing furnace is selected as a specific implementation object. There are often several heating plates in the actual chip curing furnace, and each heating plate corresponds to a temperature zone, and they affect each other. For a certain point on the substrate, its temperature is the superposition result of the thermal effects of multiple heating plates. , it is difficult to precisely control the temperature, thus affecting the quality of chip curing. It can be seen that there is strong coupling between the temperature fields in the chip curing furnace, and decoupling control is required.

[0033] Such as figure 1 As shown, it is a schematic diagram of the hardware connection to realize the decoupling cont...

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Abstract

The invention discloses a decoupling control method and system for a temperature field regional control system. According to the method, target temperature signals Ri and measurement signals Ybi of an i region of a temperature field are adopted as error signals Ei of a PID controller; the measurement signals Ybi and output signals Yai of a mathematical model of the i region of the temperature field are adopted as input signals di of a filter Fi; control signals Ui outputted by the PID controller and compensation signals Uci outputted by a mathematical inverse model of the i region of the temperature field are superposed so as to act on the i region of the temperature field; and the output temperature Yi of the i region of the temperature field is controlled. The mathematical model of the i region of the temperature field is adopted as a disturbance observer, and the mathematical model of the i region of the temperature field and a difference value outputted by actual objects are adopted as disturbance variables di, so that compensation is performed, and therefore, the coupling of the i region of the temperature field and other temperature regions can be effectively eliminated, and thus, the setting of the parameters of the PID controller can be realized with easiness, and an excellent temperature control effect can be realized. The whole control system is simple in structure and easy in operation, and can obviously improve the control precision of the regions of the temperature field.

Description

technical field [0001] The invention belongs to the field of industrial process temperature control, and relates to a decoupling control method and system for a temperature field partition control system. Background technique [0002] In the physical process and chemical reaction of chemical industry, metallurgy, petroleum and other production processes, temperature is often a very important parameter and needs to be controlled. It can be seen that the temperature control system is a kind of industrial control system with a wide range of uses. There are many control methods for the temperature control system, and the temperature field partition control is one of the very useful control methods. It is usually used in the temperature control of the air conditioner in the cab of the car, the temperature control of the chip curing furnace, and the hot air reflow soldering machine. [0003] Because the temperature field partition control system is a multivariable control system,...

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Application Information

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IPC IPC(8): G05D23/30
Inventor 李涵雄谭芳沈平
Owner CENT SOUTH UNIV
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