An enhanced smith predictor based control system using Feedback-feedforward structure for time-delay processes
Other Title(s)
نظام سميث المحسن للتنبؤ القائم على نظام المراقبة باستخدام جهاز التغذية الراجعة-التغذية المرتدة لعمليات تأخير الوقت
Joint Authors
Zahiri, Murtada Muhammad
Tafrishi, Rida
Source
The Journal of Engineering Research
Issue
Vol. 14, Issue 2 (31 Dec. 2017), pp.156-165, 10 p.
Publisher
Sultan Qaboos University College of Engineering
Publication Date
2017-12-31
Country of Publication
Oman
No. of Pages
10
Main Subjects
Engineering & Technology Sciences (Multidisciplinary)
Abstract EN
This paper presents enhanced Smith predictor based control systems (SPBCSs) for processes with a time-varying or fixed time delay.
This work focuses on improving the arrangement and asynchrony of SPBCS components rather than the design of the predictor and the feedback controller, which have been well discussed in the literature.
The proposed control system advances SPBCS through implementation of two design recommendations: (i) replacing the classical feedback controller by a feedback-feedforward control system, and (ii) synchronizing the reference signal and the predicted output.
As a result, common shortcomings of SPBCSs or control systems based on Pade approximation, i.e.
the trade-off between performance and steady-state error, and instability associated with non-minimum-phase systems do not exist in the proposed SPBCS.
The superior performance of the proposed control system is demonstrated with two examples: temperature control of an infrared dryer (a system with fixed time-delay) and air-fuel ratio of a lean-burn spark-ignition engine (a system with time-varying delay and lag).
The proposed control system is shown to clearly outperform the conventional SPBCS and Internal Model Control (IMC) PID based on Pade approximation for aforementioned examples and performs satisfactorily in the presence of noises, actuator saturations, and severe model inaccuracies.
American Psychological Association (APA)
Zahiri, Murtada Muhammad& Tafrishi, Rida. 2017. An enhanced smith predictor based control system using Feedback-feedforward structure for time-delay processes. The Journal of Engineering Research،Vol. 14, no. 2, pp.156-165.
https://search.emarefa.net/detail/BIM-801166
Modern Language Association (MLA)
Zahiri, Murtada Muhammad& Tafrishi, Rida. An enhanced smith predictor based control system using Feedback-feedforward structure for time-delay processes. The Journal of Engineering Research Vol. 14, no. 2 (2017), pp.156-165.
https://search.emarefa.net/detail/BIM-801166
American Medical Association (AMA)
Zahiri, Murtada Muhammad& Tafrishi, Rida. An enhanced smith predictor based control system using Feedback-feedforward structure for time-delay processes. The Journal of Engineering Research. 2017. Vol. 14, no. 2, pp.156-165.
https://search.emarefa.net/detail/BIM-801166
Data Type
Journal Articles
Language
English
Notes
Includes appendix : p. 165
Record ID
BIM-801166