% This example illustrates modelling of a full dynamic uncertainty % block % The function lfr offers an option for defining full blocks with % frequency domain bounds. However, this feature is not already % interfaced with MATLAB functions, therefore, it is suggested % to build normalized full blocks and to add manually the weighting % function W(s). % % +---[W]---[Delta]---+ % | | % ------>o-------------------+---[M]---> % An lfr-system M = rlfr(5,2,3,4,4,4,'m'); % Weightings W = ss(tf([30 100],[1 100])^2)*eye(2,2); % Full complex block Delta = lfr('Delta','ltifc',[2,2]); % Now we put in series M and the identity with feedback Delta*W sys = feedback(lfr(eye(2,2)),Delta*W,1)*M; size(sys)