On low frequency and long-run effects in self-tuning control

✍ Scribed by K. Latawiec; M. Chyra

• Publisher: Elsevier Science
• Year: 1983
• Tongue: English
• Weight: 635 KB
• Volume: 19
• Category: Article
• ISSN: 0005-1098
• DOI: 10.1016/0005-1098(83)90057-2

✦ Synopsis

Long-term performance of self-tuning controllers is analysed for low frequency disturbance corrupted single input-single output systems described by five variants of the linear difference equation model. Having the drifts classified, the appropriate models to allow for drift effects are specified and standard recursive least squares parameter estimation schemes are applied. Optimal single-stage control strategies are comparatively analysed both from the steady-state accuracy and stability points of view. As a result, an 'extended self-tuning controller' is developed and its superiority over classical ones is demonstrated. The related problem of 'blow-up' protection for self-tuning controllers is also investigated and some effective measures are proposed.