Experimental comparison and application of various parameter-adaptive control algorithms

Kurz, H.; Isermann, Rolf; Schumann, R.

doi:10.1016/0005-1098(80)90048-5

Cited by 80 publications

(15 citation statements)

References 15 publications

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“…Its main disad vantage is that it can give biased estimates unless the true system can be described by Eq. (20) with C{q~^) = 1 (Âstrôm, 1983;Kurz et al, 1980). As the parameter converges with recursive least-squares estimation, however, Fortescue et al (1981) reported that better control can be achieved and the optimal control law can even result in the case of convergence to biased estimates of the system parameters.…”

Section: Y{t) =mentioning

confidence: 99%

Self-Tuning Controller for Farm Tractor Guidance

Noh¹,

Erbach²

1991

SAE Technical Paper Series

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The most advanced technology has been used to photograph and reproduce this manuscript from the microfilm master. UMI films the text directly from the original or copy submitted. Thus, some thesis and dissertation copies are in typewriter face, while others may be from any type of computer printer.The quality of this reproduction is dependent upon the quality of the copy submitted. Broken or indistinct print, colored or poor quality illustrations and photographs, print bleedthrough, substandard margins, and improper alignment can adversely affect reproduction.In the unlikely event that the author did not send UMI a complete manuscript and there are missing pages, these will be rioted. Also, if unauthorized copyright material had to be removed, a note will indicate the deletion.Oversize materials (e.g., maps, drawings, charts) are reproduced by sectioning the original, beginning at the upper left-hand corner and continuing from left to right in equal sections with small overlaps. Each original is also photographed in one exposure and is included in reduced form at the back of the book.

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Section: Y{t) =mentioning

confidence: 99%

Self-Tuning Controller for Farm Tractor Guidance

Noh¹,

Erbach²

1991

SAE Technical Paper Series

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“…It has been shown by Wittenmark (1973) and Kurz and Goedecke (1981), among others, that the closed-loop system may be unstable if the model time-delay does not coincide with a constant process time delay, or if there is a variation in the process time delay. The above two algorithms can be adapted to time-delay changes if the time delay is also estimated on-line.…”

Section: Introductionmentioning

confidence: 97%

“…Several survey articles and monographs are available which summarize the extensive research activity of the past decade (Astrom 1982, Harris and Billings 1981, Astrom 1983, Clarke and Gawthrop 1979, Parks et al 1980, Seborg et al 1983. Experimental applications of self-tuners have been reviewed by Astrorn (1983), Parks et al (1980), Kurz et al (1980), Belanger (1982) and Seborg et al (1983).…”

Section: Introductionmentioning

confidence: 98%

“…The above two algorithms can be adapted to time-delay changes if the time delay is also estimated on-line. Kurz and Goedecke (1981) proposed a method based on obtaining an explicit estimate of the time delay on-line; however, its large computational requirements are a significant disadvantage. Wellstead et al (\ 979) have suggested modifying the process model of their self-tuning pole-placement algorithm to allow the controller to adapt to an unknown or varying time delay without requiring a direct estimate of the time delay.…”

Section: Introductionmentioning

confidence: 99%

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A self-tuning controller for systems with unknown or varying time delays†

Chien

Seborg

Mellichamp

1985

International Journal of Control

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A SISO self-tuning controller with a Smith-predictor [ype of time delay compensator (STC-TDC) is proposed to handle open-loop stable processes with unknown or varying time delays. Two numerical examples comparing PI control, the standard STC of Clarke and Gawthrop, the self-tuning Dahlin algorithm of Vogel and Edgar, and the STC-TDC show that the new approach performs best for both set-point and load changes when process time delay changes occur. A third example shows that the STC-TDC matches the extended stability characteristics of the alternative approach due to Kurz and Goedecke but is computationally much simpler.

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“…Kurz, Isermann, and Schumann [10] have compared various parameter-adaptive control algorithms. They indicate that parameter-adaptive control can be used for tuning of digital control algorithms, for digital adaptive control of slowly time-varying processes, and for digital adaptive control of weakly non-linear and partially unstable processes.…”

mentioning

confidence: 99%