国外专家做的求解LMI鲁棒控制的工具箱,可以相对高效的解决LMI问题

				function sys = double(X)
				%double           Overloaded.
				
				% Author Johan L鰂berg
				% $Id: double.m,v 1.3 2005/02/12 13:24:38 johanl Exp $
				
				nlmi = size(X.clauses,2);
				
				if (nlmi == 0) 
				 sys = NaN;
				end
				
				if nlmi>1 
				 error('Double not applicable on list of constraints')
				end
				
				sys = double(X.clauses{1}.data);