Necessary and sufficient conditions are formulated for the zeros of an arbi
trary polynomial matrix to belong to a given region D of the complex plane.
The conditions stem from a general optimization methodology mixing quadrat
ic and semidefinite programming, LFRs and rank-one LMIs. They are expressed
as an LMI feasibility problem that can be tackled with widespread powerful
interior-point methods. Most importantly, the D-stability conditions can b
e combined with other LMI conditions arising in robust stability analysis.