By Eugenio Schuster, Michael Walker (auth.), Sophie Tarbouriech Dr., Professor Germain Garcia, Adolf Hermann Glattfelder (eds.)
Physical, defense or technological constraints result in that the keep watch over actuators can neither supply limitless amplitude indications nor limitless pace of response. The keep an eye on difficulties of strive against plane prototypes and satellite tv for pc launchers provide attention-grabbing examples of the problems as a result of those significant constraints.
Neglecting actuator saturations on either amplitude and dynamics will be resource of bad or perhaps catastrophic habit for the closed-loop procedure (such as loosing closed-loop stability).
Such actuator saturations have additionally been blamed as one of many unlucky mishaps resulting in the 1986 Chernobyl nuclear energy plant catastrophe. For those purposes, the learn of the keep watch over challenge (its constitution, functionality and balance research) for platforms topic to either amplitude and expense actuator or sensor saturations as commonplace constraints has acquired the eye of many researchers within the final years.
The assorted concepts defined during the ebook are relatively appealing for commercial purposes not just in aeronautical or house domain names but in addition within the context of organic platforms area. Such equipment are well matched for the advance of instruments that aid engineers to resolve research and synthesis difficulties within the context of regulate structures with enter and output constraints
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Extra resources for Advanced Strategies in Control Systems with Input and Output Constraints
Whereas controller windup can be removed by mere structural methods (appropriately add a model of input saturation to the controller and stabilize it when its output signal becomes constraint), the prevention of plant windup usually calls for additional dynamic elements like the filtered setpoint  or the additional dynamic network . Consequently, the prevention of windup is possible in a two-step approach. , if the danger of plant windup exists), introduce additional dynamic elements. A one-step approach to the joint prevention of controller and plant windup was presented in .
An artificial multivariable state dependent saturation element preserving the directionality of the input vector is used in . An optimization of the internal model control setup to minimize the effects of input saturation on the directionality problem is presented in . All these approaches constitute approximate solutions. The only scheme seemingly preserving the decoupled behaviour in spite of input saturation is the directionality preserving control of . Unfortunately it maintains directionality only in very specific applications.
M. Ariola, A. Pironti and A. Portone, “A framework for the design of a plasma current and shape controller in next-generation tokamaks,” Fusion Technology, Vol. 36, pp. 263-277, Nov. 1999. Anti-Windup Augmentation in the DIII-D Tokamak 29 7. M. Ariola, G. Ambrosino, J. B. Lister, A. Pironti, F. Villone and P. Vyas, “A modern plasma controller tested on the TCV tokamak,” Fusion Technology, Vol. 36, pp. 126-138, Sep. 1999. 8. G. Ambrosino, M. Ariola, Y. Mitrishkin, A. Pironti and A. Portone, “Plasma current and shape control in tokamaks using H∞ and µ-synthesis,” Proceedings of the 36th Conference on Decision and Control, San Diego, California, USA, pp.