I’m not very familiar with PID control for heating, so I’d like to ask the teachers for some advice.
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The PID is used to heat a 1KW heating plate, with a set point of 101 degrees. After the temperature stabilized, the measured value remained at 106.6 degrees. The output ratio remains at 6-7%. It rose by 5 to 6 degrees. May I ask the teachers how to adjust the PID values so that the output remains at 6% when the temperature is at 101 degrees? Thank you! :)
It’s too complex; could you explain it in simpler terms?
The temperature has a strong lag, making it difficult to achieve the fixed output and fixed temperature you mentioned.
The temperature has a strong lag, making it difficult to achieve the fixed output and fixed temperature you mentioned.
Since it is PID control, it is not possible to maintain a fixed output value. One can first manually set the value to 100 degrees and turn off the output to see if the temperature continues to rise; due to the lag in temperature measurement, the PID parameters can then be adjusted, with an increase in the integration term being typical in such cases.
Since it is PID control, it is not possible to maintain a fixed output value. One can first manually set the value to 100 degrees and turn off the output to see if the temperature continues to rise; due to the lag in temperature measurement, the PID parameters can then be adjusted, with an increase in the integration term being typical in such cases.
Are 101 degrees and 106 degrees temperatures measured by the same instrument? It is normal for there to be variations when different instruments take measurements in different locations
It doesn’t matter what the output level is; what’s important is to maintain the temperature at 101. From the readings, it seems that the temperature remains constant at 106.6, which indicates there is some margin for adjustment. Try adjusting the PID parameters, focusing on reducing the integration time.