Abstract:In the process of heating for materials, ordinary PID control methods cause the high temperature overshoot, which damages the structure and properties of the sample. In views of the large thermal inertia under the vacuum system, A PID control based on dynamic temperature assignment (PID-DTA) was proposed. According to temperature differences between the current temperature and target temperature, the assignment temperature of PID controller is changed until the heating temperature reaches the set value. The PID-DTA heating method is validated by experiments using the high vacuum heating system. It is proved by experiment that the PID-DTA heating method effectively reduces the temperature overshoot of heating, and shortens the stability time of temperature control.

No abstract