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Simple Controller Approach with Smith Predictor for Long Time Delay Systems | ||
| Journal of Engineering and Sustainable Development | ||
| Article 1, Volume 17, Issue 2, 2013, Pages 47-63 | ||
| Author | ||
| Nahida Naji Kadhim | ||
| Abstract | ||
| There are many approaches that are used for controlling or enhanced the performance of the time delay systems, one of the most popular approaches is smith predictor method, but this approach may give bad performance or make the system unstable if the time delay become very long. Kaya and Atherton controller method is one of an effective method to solve this problem. In this paper, a simple controller approach is suggested with smith predictor in order to maintain the stability of the higher order plant in addition to improve the performance of the controlled system. This controller consist from two parts, the first part is PI_D controller, where the values of KP, KI, and KD are determine from the denominator equation of the reduce order plant mathematical equation. The second part (PD) is used to reject or reduce the effect of external disturbance. The second part is also used with Kaya and Atherton controller method to enhance the performance of this approach. Four linear stable examples with disturbance are tested by the suggested approach and by the control method Kaya and Atherton to compare the performance o f these controllers. | ||
| Keywords | ||
| Smith predictor; higher order system; long time delay; disturbance removal | ||
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