Cho, NamhoonLee, Hae-In2023-11-082023-11-082023-11-07Cho N, Lee H-I. (2024) Approximation of achievable robustness limit based on sensitivity inversion. Journal of Guidance, Control, and Dynamics, Volume 47, Issue 1, January 2024, pp. 143-1550731-5090https://doi.org/10.2514/1.G007169https://dspace.lib.cranfield.ac.uk/handle/1826/20521Introduction: The sensitivity function, defined as the closed-loop transfer function from the exogenous input to the tracking error, is central to the multi-objective design and analysis of a feedback control system. Its frequency response determines many performance characteristics of the closed-loop system, such as disturbance attenuation, reference tracking, and robustness against uncertainties and noise. It is well known that the nominal sensitivity peak, i.e., the H∞ -norm of the sensitivity function, is a direct measure of stability robustness, because the sensitivity magnitude quantifies both the attenuation of the effect of external disturbances on the closed-loop output and the variations of the closed-loop system with respect to the plant perturbations.enAttribution-NonCommercial 4.0 InternationalArticle