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Lookup NU author(s): Dr Ming Tham
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Disturbance observers (DOs), which are popularly used for improving the disturbance rejection capability of mechatronic servo control systems, offer several attractive features that could prove beneficial for process control systems. The tuning is simple and intuitive and they allow independent tuning of disturbance rejection characteristics, which is particularly helpful in situations in which gains need to be tuned on-line. This paper is concerned with examining DO design for continuous-time systems with delay. Two methods for incorporating time delay into traditional DO design are considered, to assess their relative performance, stability, and noise rejection characteristics. The performance of one of these time-delay-based DO approaches is then compared with proportional, integral and derivative (PID) control, designed using a maximum sensitivity approach, on a representative process model. The paper concludes by briefly examining the incorporation of a DO into a two-degrees-of-freedom (2DOF) control structure. © 2007 Curtin University of Technology and John Wiley & Sons, Ltd.
Author(s): Jones RW, Tham MT
Publication type: Conference Proceedings (inc. Abstract)
Publication status: Published
Conference Name: Asia-Pacific Journal of Chemical Engineering: Process Systems Engineering
Year of Conference: 2007
Pages: 517-525
ISSN: 1932-2135
Publisher: John Wiley & Sons Ltd.
URL: http://dx.doi.org/10.1002/apj.96
DOI: 10.1002/apj.96
Library holdings: Search Newcastle University Library for this item
ISBN: 19322143
