Limitations and countermeasures of PID controllers
SCIE
SCOPUS
- Title
- Limitations and countermeasures of PID controllers
- Authors
- Sung, SW; Lee, IB
- Date Issued
- 1996-08
- Publisher
- AMER CHEMICAL SOC
- Abstract
- It is well-known that PID controllers show poor control performances for an integrating process and a large time delay process. Moreover, it cannot incorporate ramp-type set-point change or slow disturbance. We discuss the above-mentioned limitations of the PID controller. Through the analysis of the limitations, simple techniques are developed to avoid these poor control performances and incapabilities. We introduce a control structure composed of two PID controllers to manipulate both the set-point change process and the input disturbance rejection process. A simple feedforward and feedback loop are proposed to treat a ramp-type set point and disturbance (low-frequency set paint and disturbance). In addition, an internal feedback loop is introduced to incorporate integrating processes, and a tuning strategy using the model reduction is proposed to efficiently tune the controller for high-order processes. A dead-time compensator is used to manipulate a large time delay process more efficiently.
- Keywords
- RELAY FEEDBACK METHOD; MODIFIED SMITH PREDICTOR; MULTIVARIABLE SYSTEMS; PH CONTROL; DEAD-TIME; IDENTIFICATION; ONLINE; DERIVATION; REGULATOR; SINGLE
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/21517
- DOI
- 10.1021/ie960090+
- ISSN
- 0888-5885
- Article Type
- Article
- Citation
- INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, vol. 35, no. 8, page. 2596 - 2610, 1996-08
- Files in This Item:
- There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.