Application of conicity stability criteria to multivariable expert control systems

A restated design-oriented conicity criterion is presented. The advantage is that all possible stability cones are investigated. The stability conditions are reformulated in a more familiar language to control engineering, aided with graphic plots. A robustness margin is defined, and the synthesis is facilitated, as the main unstabilizing protocol rules or frequency values are easily detected. The adequate applicability questions are also solved, such as how to put the linear plant in a standard n×n form