The temperature control system is widely used in the heat treatment furnace, kiln, electric oven and other equipment.These devices are only different, and the process requirements for temperature control are basically the same, that is, the temperature of the controlled object is required to converge at the temperature given by the predetermined precision after the transition process is allowed.And remain unchanged over a period of time.The temperature control system itself is a large lag system, and the object parameters have changed, and it is difficult to establish an accurate mathematical model.
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The system is at a constant temperature stage, with the following features:
(1) The overshoot is large, and the oscillation cycle is long.
Due to the lag function of the controlled object, the actual temperature after reaching the set constant temperature value, the total amount produces a large overshoot, and it may tend to stabilize after multiple oscillation processes.
(2) It is easy to generate full satisfaction.
The oscillation caused by lagging effects is very easy to make the integration, and thus the generated oscillation process is more intense.
(3) Sensitive to interference.