Multipliers for Nonlinearities With Monotone Bounds
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In: IEEE Transactions on Automatic Control, Vol. 67, No. 2, 01.02.2022, p. 910-917.
Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Multipliers for Nonlinearities With Monotone Bounds
AU - Heath, William Paul
AU - Carrasco, Joaquin
AU - Altshuller, Dmitry A.
PY - 2022/2/1
Y1 - 2022/2/1
N2 - We consider Lurye (sometimes written Lur’e) systems, whose nonlinear operator is characterized by a possibly multivalued nonlinearity that is bounded above and below by monotone functions. Stability can be established using a subclass of the Zames–Falb multipliers. The result generalizes similar approaches in the literature. Appropriate multipliers can be found using convex searches. Because the multipliers can be used for multivalued nonlinearities, they can be applied after loop transformation. We illustrate the power of new multipliers with two examples: one in continuous time and the other in discrete time: in the first, the approach is shown to outperform available stability tests in the literature; in the second, we focus on the special case for asymmetric saturation with important consequences for systems with nonzero steady-state exogenous signals
AB - We consider Lurye (sometimes written Lur’e) systems, whose nonlinear operator is characterized by a possibly multivalued nonlinearity that is bounded above and below by monotone functions. Stability can be established using a subclass of the Zames–Falb multipliers. The result generalizes similar approaches in the literature. Appropriate multipliers can be found using convex searches. Because the multipliers can be used for multivalued nonlinearities, they can be applied after loop transformation. We illustrate the power of new multipliers with two examples: one in continuous time and the other in discrete time: in the first, the approach is shown to outperform available stability tests in the literature; in the second, we focus on the special case for asymmetric saturation with important consequences for systems with nonzero steady-state exogenous signals
U2 - 10.1109/tac.2021.3082845
DO - 10.1109/tac.2021.3082845
M3 - Erthygl
VL - 67
SP - 910
EP - 917
JO - IEEE Transactions on Automatic Control
JF - IEEE Transactions on Automatic Control
SN - 2334-3303
IS - 2
ER -