Read e-book online ADVANCES IN DISCRETE TIME SYSTEMS PDF

By Edited by Magdi S. Mahmoud

This quantity brings in regards to the modern ends up in the sphere of discrete-time platforms. It covers papers written at the subject matters of strong regulate, nonlinear structures and up to date purposes. even though the technical perspectives are varied, all of them geared in the direction of targeting the updated wisdom achieve via the researchers and supplying powerful advancements alongside the platforms and keep watch over enviornment. every one subject has an in depth discussions and recommendations for destiny perusal by means of investigators.

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In this case, a feedback gain in the controller (4) is given K = − Λ −1 Ψ T . (14) Proof: (Sufficiency) The closed-loop system (6) with the feedback gain (14) is given by Ex (k + 1) = ( A − BΛ−1 Γ T + Hc Fc (k) Gc ) x (k). where Gc = G T −ΨΛ−1 verified that T . Then, by some mathematical manipulation and (13), it can be 36 8 Advances in Discrete Time Systems Advances in Discrete Time Systems QS T ( A − BΛ−1 Ψ T ) + ( A − BΛ−1 Ψ T ) T SQ T − E T PE + εGcT Gc + ε−1 QS T Hc HcT SQ T +( A − BΛ−1 Ψ T + ε−1 Hc HcT SQ T ) T Γ−1 ( A − BΛ−1 Ψ T + ε−1 Hc HcT SQ T ) = QS T A + A T SQ T − E T PE + ( A + ε−1 Hc HcT SQ T ) T Γ−1 ( A + ε−1 Hc HcT SQ T ) +εG T G − QS T BΛ−1 Ψ T − ( A + ε−1 Hc HcT SQ T ) T Γ−1 BΛ−1 Ψ T − ΨΛ−1 B T SQ T −ΨΛ−1 B T Γ−1 ( A + ε−1 Hc HcT SQ T ) + ΨΛ−1 B T Γ−1 BΛ−1 Γ T + εΨΛ−1 Λ−1 Ψ T +ε−1 QS T Hc HcT SQ T = QS T A + A T SQ T − E T PE + ( A + ε−1 Hc HcT SQ T ) T Γ−1 ( A + ε−1 Hc HcT SQ T ) +εG T G − [ QS T + ( A + ε−1 Hc HcT SQ T ) T Γ−1 ] BΛ−1 Ψ T −ΨΛ−1 B T [SQ T + Γ−1 ( A + ε−1 Hc HcT SQ T )] + ΨΛ−1 Ψ T + ε−1 QS T Hc HcT SQ T = QS T A + A T SQ T − E T PE + εG T G + ε−1 QS T Hc HcT SQ T + Θ T Γ−1 Θ − ΨΛ−1 Ψ T < 0.

21] Tse, E. (1971). On the optimal control of stochastic linear systems. IEEE Trans. Aut. Control, 16(6), 776-785. [22] Xu, X. (1996). A study on robust control for discrete-time systems with uncertainty. A Master Thesis of 1995, Kobe university, Kobe, Japan, January, 1996. [23] Xu, X. (2008). Characterization of all static state feedback mixed LQR/H∞ controllers for linear continuous-time systems. Proceedings of the 27th Chinese Control Conference, Kunming, Yunnan, China, 678-682, July 16-18, 2008.

3(ii), we obtain the following result. 6. Given K, the descriptor system (6) is robustly admissible if and only if there exist matrix P and scalar ε > 0 such that − E T PE + ε( G T G + K T K ) ( A + BK ) T P  P( A + BK ) −P   0 HT P 0 αB T P  E T PE ≥ 0, (10)  0 0 PH αPB  < 0. 3. Robust control design In the previous section, we have obtained robust admissibility conditions of the closed-loop system (6). Based on those conditions, we now seek how to calculate a feedback gain K in the controller (4).

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