mvsum.m

控制系统计算机辅助设计——MATLAB语言与应用(源代码）

function [a,b,c,d]=mvsum(a1,b1,c1,d1,a2,b2,c2,d2)
%MVSUM	Sum the outputs of two state space systems.
%	[A,B,C,D]=MVSUM(A1,B1,C1,D1,A2,B2,C2,D2)
%	sums the outputs of the two state space systems
%	A1,B1,C1,D1 and A2,B2,C2,D2

%	Dr M.P. Ford 4th August 1987
% Copyright (c) 1987 by GEC Engineering Research Centre & Cambridge Control Ltd

error(abcdchk(a1,b1,c1,d1));
error(abcdchk(a2,b2,c2,d2));
[ma1,na1]=size(a1);
[ma2,na2]=size(a2);
[mb1,nb1]=size(b1);
[mb2,nb2]=size(b2);
d = [d1 , d2];

if abcpgchk(a1,b1,c1)
   a=a2;
   b=[zeros(mb2,nb1) , b2];
   c=c2;
elseif abcpgchk(a2,b2,c2)
   a=a1;
   b=[b1 , zeros(mb1,nb2)];
   c=c1;
else
   a=[a1 , zeros(ma1,na2)
      zeros(ma2,na1) , a2];
   b = [b1 , zeros(mb1,nb2)
        zeros(mb2,nb1) , b2];
   c = [c1 , c2];
end