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Journals / Dicle Üniversitesi Mühendislik Fakültesi Mühendislik Dergisi / 2026 / Cilt: 17 Sayı: 1

Performance comparison of different Smith Predictor controller structures

Farklı Smith Öngörücü kontrolör yapılarının performans karşılaştırması

Yasemin İçmez(TOKAT GAZİOSMANPAŞA ÜNİVERSİTESİ, NİKSAR MESLEK YÜKSEKOKULU)0000-0002-9635-844X
Mehmet Serhat Can(TOKAT GAZİOSMANPAŞA ÜNİVERSİTESİ, MÜHENDİSLİK VE MİMARLIK FAKÜLTESİ, ELEKTRİK-ELEKTRONİK MÜHENDİSLİĞİ BÖLÜMÜ)0000-0003-2356-9921
Pages
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Publication Date
2026-03-25
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Based on the findings, the Smith Predictor structure was determined to offer the best control performance among the four structures examined for time-delay systems.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:Industrial processes have significant time delays due to their long-time constants and the inclusion of integrators.
📊
Key Findings & Data:This study compares the performance of four different Smith Predictor structures previously presented in the literature.
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Conclusion & Impact:Based on the findings, the Smith Predictor structure was determined to offer the best control performance among the four structures examined for time-delay systems.
🔬Design:Modeling & Simulation
📍Scope:Comprehensive Sample
⚙️Variables:Smith öngörücü · zaman gecikmeli sistemler · genetik algoritma optimizasyonu

Abstract

Industrial processes have significant time delays due to their long-time constants and the inclusion of integrators. This can lead to undesirable conditions such as high overshoot, oscillation, and instability. The Smith Predictor, developed by O. J. M. Smith, is an effective controller structure for controlling processes with time delays. This study compares the performance of four different Smith Predictor structures previously presented in the literature. To ensure the comparisons are objective, the controller parameters for all predictor models were determined using a Genetic Algorithm (GA)-based optimization method under the same optimization settings. Three different long-time-delay systems were considered in the study: the first is a fourth-order system with no roots at the origin, the second is a fifth-order system with one root at the origin and the others discrete, and the third is a second-order, two-pole system containing a pole at the origin. Based on the findings, the Smith Predictor structure was determined to offer the best control performance among the four structures examined for time-delay systems.

Özet

Endüstriyel süreçler, geniş zaman sabiteleri ve entegratör içermeleri nedeniyle ciddi zaman gecikmesine sahiptirler. Bu ise yüksek aşım oranı, salınım ve kararsızlık gibi istenmeyen durumları ortaya çıkarabilmektedir. O. J. M. Smith tarafından geliştirilen Smith Öngörücüsü, zaman gecikmesi içeren proseslerin kontrolünde etkili bir kontrolör yapısıdır. Bu çalışmada, daha önce literatürde sunulmuş dört farklı Smith Öngörücüsü yapısının performansları karşılaştırılmaktadır. Karşılaştırmaların nesnel olabilmesi için tüm öngörücü modellerinde kontrolör parametreleri, Genetik Algoritma (GA) temelli optimizasyon yöntemi ile aynı optimizasyon ayarları altında belirlenmiştir. Çalışmada üç farklı uzun zaman gecikmeli sistem dikkate alınmıştır: İlkinde dördüncü dereceden ve orijinde kök bulundurmayan bir sistem, ikincisinde beşinci dereceden, bir kökü orijinde ve diğerleri ayrık olan bir sistem, üçüncüsünde ise ikinci dereceden, orijinde bir kutup içeren iki kutuplu bir sistem ele alınmaktadır. Elde edilen bulgular ile zaman gecikmeli sistemler için incelenen dört yapıdan en iyi kontrol performansını sunan Smith Öngörücüsü yapısı belirlenmiştir.

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Cite This Article

İçmez, Y., Can, M. S. (2026). Performance comparison of different Smith Predictor controller structures. Dicle Üniversitesi Mühendislik Fakültesi Mühendislik Dergisi, Cilt: 17 Sayı: 1. https://doi.org/10.24012/dumf.1807392

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