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Advanced Strategies in Control Systems with Input and Output by Sophie Tarbouriech, Germain Garcia, Adolf H. Glattfelder

By Sophie Tarbouriech, Germain Garcia, Adolf H. Glattfelder

Physical, safeguard or technological constraints result in that the regulate actuators can neither offer limitless amplitude signs nor limitless pace of response. The keep an eye on difficulties of wrestle plane prototypes and satellite tv for pc launchers supply attention-grabbing examples of the problems because of those significant constraints.

Neglecting actuator saturations on either amplitude and dynamics could 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 the unlucky mishaps resulting in the 1986 Chernobyl nuclear energy plant catastrophe. For those purposes, the learn of the keep an eye on challenge (its constitution, functionality and balance research) for structures topic to either amplitude and cost actuator or sensor saturations as common constraints has got the eye of many researchers within the final years.

The assorted innovations defined through the publication are relatively appealing for business purposes not just in aeronautical or area domain names but additionally within the context of organic structures area. Such equipment are well matched for the advance of instruments that support engineers to resolve research and synthesis difficulties within the context of keep an eye on structures with enter and output constraints

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Additional info for Advanced Strategies in Control Systems with Input and Output Constraints

Example text

Bε =   0   1 (28) Thus the vector v(t) has pq components. The quantity u ˆC (t) is defined by u ˆC (t) = Kx Kv x ˆ(t) v(t) (29) The matrices Kx and Kv will be chosen to obtain a controlled signal model with desired eigenvalues and a reference behaviour that only depends on the nominal state feedback Kx(t). Given the solution X of the Sylvester equation X(A − BK) − SX = Bε C and the matrix (30) Stable and Unstable Systems with Amplitude and Rate Saturation 45 Bσ = −XB (31) With this Bσ choose the feedback matrix Kv such that the eigenvalues of (S − Bσ Kv ) have desired locations.

1995. 11. G. Ambrosino, M. Ariola, A. Pironti, A. Portone and M. Walker, “A control scheme to deal with coil current saturation in a tokamak,” IEEE Transactions on Control Systems Technology, Vol. 9, no. 6, p. 831, November 2001. 12. R. Albanese, G. Ambrosino, A. Pironti, R. Fressa and A. Portone, “Optimization of the power supply demand for plasma shape control in a tokamak,” IEEE Transactions on Magnetics, Vol. 34, no. 5, p. 3580, September 1998. 13. L. Scibile and B. Kouvaritakis, “A discrete adaptive near-time optimum control for the plasma vertical position in a tokamak,” IEEE Transactions on Control Systems Technology, Vol.

P (14) the saturation us (t) = satu0 (u(t)) at the input of the system never becomes active in spite of jointly acting reference and disturbance signals. Consequently, even in the presence of exponentially unstable systems the stability of the scheme in Fig. 3 is guaranteed. Remark 3. A design of the scheme in Fig. 3 such that the input saturation us (t) = satu0 (u(t)) never becomes active gives rather conservative results. If one knew the exact forms of the reference and the disturbance signals, one could allow for some over-saturation in the sense of [27].

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