Fig. 8
From: Tracking control of air flow based on a fractional-order model of the lung impedance
(a) Closed-loop eigenvalues for the nominal system (blue \(\times\) markers) and for 100 perturbed systems with variations of up to \(\pm 15\%\) in the \(R_{UA}\) and \(C_{UA}\) parameters (red \(\bullet\) markers). The boundary of the \(\mathfrak {D}\) region (green line) and the stability limits (black dash-dotted lines) are also shown. The inset shows an enlarged view of the region close to the origin. (b) Simulation results for the nominal (blue lines) and perturbed systems (red lines). The v(t) reference for the flow is depicted by an orange dash-dotted line. The insets present enlarged views of the dispersion around the nominal response.
