This paper presents a robust H∞ filter design method for a class of uncertain linear systems with unstable modes.
If the system with unstable modes is globally exponentially stabilizable, then our method is guaranteed to provide the feedback control law that minimizes the chosen quadratic performance index, and that guarantees the closed loop system to be globally asymptotically stable.
The analysis shows that eigenvalues possessing positive real parts tend to produce unstable modes with the propensity towards the generation of squeal noise.
The analysis shows that non-dissipative approximations can have unstable modes with growth rates proportional to the inverse of the mesh spacing.
It is demonstrated, in particular, that while for some geometries and configurations of the sliding system the imperfections determine the excitation of unstable modes, with other configurations strong excitation occurs even in the absence of imperfections.
For (bar alpha < frac {hat nu _{y}^{2}}{K}}r {K}}), modes with all orientations become thus unstable, but the maximum growth rate still corresponds to (q_{c}vec 1_{x}).
The zero solution is unstable
This change in shape can be interpreted as the growth of the mode with the longest unstable wavelength which allows the tumor to grow indefinitely as long as the peri-tumor vasculature covers the entire tumor.
Acidemic patients (pH < 7.25 and PCO2 > 55 mmHg) and those with unstable haemodynamics were intubated and ventilated with a volume targeted mode.
"Countries with unstable currencies are not tourists' first choice.
