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Feedforward control, PID control laws, and almost invariant subspaces. (English) Zbl 0473.93032

MSC:
93B35 Sensitivity (robustness)
93B25 Algebraic methods
93D15 Stabilization of systems by feedback
93C05 Linear systems in control theory
93C99 Model systems in control theory
93C55 Discrete-time control/observation systems
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References:
[1] Wonham, W.M.; Wonham, W.M., ()
[2] Willems, J.C.; Commault, C., Disturbance decoupling by measuremenl feedback with stability or pole placement, SIAM J. control optim., 19, 4, 490-504, (1981) · Zbl 0467.93036
[3] Willems, J.C., Almost A (mod ℬ)-invariant subspaces, Astérisque, 75-76, 239-248, (1980) · Zbl 0459.93029
[4] Willems, J.C., Almost invariant subspaces: an approach to high gain feedback design —part I: almost controlled invariant subspaces, IEEE trans. automat. control, 26, 1, 235-252, (1981) · Zbl 0463.93020
[5] J.C. Willems, Almost invariant subspaces: an approach to high gain feedback design — Part II: Almost conditionally invariant subspaces, IEEE Trans. Automat. Control, submitted for publication. · Zbl 0491.93022
[6] Molinari, B.P., A strong controllability and observability in linear multivariable control, IEEE trans. automat. control, 21, 5, 761-764, (1976) · Zbl 0334.93009
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