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Robust stability of discrete-time systems using delta operators

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1 Author(s)
Soh, C.B. ; Sch. of Electr. & Electron. Eng., Nanyang Technol. Inst., Singapore

The robust stability of discrete-time systems formulated in terms of the delta (δ) operator is discussed. That is, given the nominal characteristic equation P(δ) of a discrete-time system, it is of interest to know how much the coefficients can be perturbed while preserving stability. A procedure to obtain the maximum intervals for a perturbed polynomial P(δ) to still be stable is presented

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Automatic Control, IEEE Transactions on  (Volume:36 ,  Issue: 3 )