Research output: Contribution to journal › Article › peer-review
New robustness bounds for neutral type delay systems via functionals with prescribed derivative. / Александрова, Ирина Васильевна.
In: Applied Mathematics Letters, Vol. 76, No. 76, 02.2018, p. 34-39.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - New robustness bounds for neutral type delay systems via functionals with prescribed derivative
AU - Александрова, Ирина Васильевна
PY - 2018/2
Y1 - 2018/2
N2 - The paper is devoted to the robust stability analysis of linear neutral type time delay systems with a constant delay and norm-bounded uncertainties. The method is based on the Lyapunov–Krasovskii functional with a derivative prescribed as a negative definite quadratic form of the “current” system state, which is considered to be not suitable for the robustness analysis due to the fact that it does not admit a quadratic lower bound. Unlike existing results, our approach does not require the derivative of the functional along the solutions of the perturbed system to be negative definite. Instead, we need just an essential part of the integral of the derivative to be negative. The resulting stability condition is presented in the form of a simple inequality depending on the so-called Lyapunov matrix, under an assumption that the difference operator of the perturbed system is stable. The result is applicable to all exponentially stable systems.
AB - The paper is devoted to the robust stability analysis of linear neutral type time delay systems with a constant delay and norm-bounded uncertainties. The method is based on the Lyapunov–Krasovskii functional with a derivative prescribed as a negative definite quadratic form of the “current” system state, which is considered to be not suitable for the robustness analysis due to the fact that it does not admit a quadratic lower bound. Unlike existing results, our approach does not require the derivative of the functional along the solutions of the perturbed system to be negative definite. Instead, we need just an essential part of the integral of the derivative to be negative. The resulting stability condition is presented in the form of a simple inequality depending on the so-called Lyapunov matrix, under an assumption that the difference operator of the perturbed system is stable. The result is applicable to all exponentially stable systems.
KW - Lyapunov matrix
KW - Lyapunov–Krasovskii functionals
KW - Neutral type time delay systems
KW - Norm-bounded uncertainties
KW - Robust stability
UR - http://www.scopus.com/inward/record.url?scp=85027868825&partnerID=8YFLogxK
U2 - 10.1016/j.aml.2017.07.009
DO - 10.1016/j.aml.2017.07.009
M3 - Article
VL - 76
SP - 34
EP - 39
JO - Applied Mathematics Letters
JF - Applied Mathematics Letters
SN - 0893-9659
IS - 76
ER -
ID: 18530054