Discussion

We summarize our findings now. The experiment has been performed by varying the heater current and keeping the fan speed constant. However, the user is encouraged to experiment using different combinations of fan speed and heater current. Negative ramp can also be used to make the experiment more informative. It is not necessary to keep a particular input constant. For example, you can try giving a ramp input to the disturbance signal, i.e., the fan input. The system can also be treated as a second order system. This consideration is necessary as it increases the accuracy of the acquired transfer function [2].