Design of robust $H_\infty$-controllers of multivariable systems based on the given stability degree

For the linear multivariable plants whose physical parameters are subject to deviations from the rated values, the measurable output-based controllers were designed providing the given degree of stability of the closed-loop system which defines the desired time of control. This approach relies on the “technique of opening the plant-controller system” for the investigated physical parameters and comes to a standard problem of $H_\infty$-optimization. An example was presented.