| Title |
Performance/Robustness Improvement of i-PID with Two-Degree-of-Freedom Controller |
| DOI |
https://doi.org/10.5370/KIEE.2017.66.6.927 |
| Keywords |
i-PID (intelligent PID) ; Two-Degree-of-Freedom ; Anisochronic model |
| Abstract |
This paper is concerned with applicability of two-degree-of-freedom controllers to the recently suggested i-PID controllers, in which unknown parts of the plant are taken into account without any modeling procedure. First, i-PID controller with two-degree-of-freedom is applied to a specific model, called Anisochronic model, to confirm the usefulness of this method. Second, using the original examples of i-PID controllers, it is confirmed that performance/robustness of system are to be improved due to two-degree-of-freedom, especially when the input changes suddenly. It is seen that as the desired robustness increases the optimal value of two-degree-of-freedom parameter {α}_A would be negative. It is checked and verified that if this value was limited to 1 or less as is generally known, performance would be degraded. |