Simultaneous Stabilization of 3 Or More Plants - Conditions On the Positive Real Axis Do Not Suffice
(1994) SIAM Journal on Control and Optimization —
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- Abstract
- The problem of the simultaneous stabilizability of a finite family of single-input, single-output time-invariant systems by a time-invariant controller is studied. The link between stabilization and avoidance is shown and is used to derive necessary conditions for the simultaneous stabilization of k plants. These necessary conditions are proved to be, in general, not sufficient. This result also disproves a long-standing conjecture on the stabilizability condition of a single plant with a stable minimum phase controller. The main result is to show that, unlike the case of two plants, the existence of a simultaneous stabilizing controller for more than two plants is not guaranteed by the existence of a controller such that the closed loops have no real unstable poles.
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Blondel, V., Gevers, M., Mortini, R., & Rupp, R. (1994). Simultaneous Stabilization of 3 Or More Plants - Conditions On the Positive Real Axis Do Not Suffice. SIAM Journal on Control and Optimization. https://doi.org/10.1137/S0363012991218815