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BringLightonChip
11Â¥2015-02-04 12:51:38
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7Â¥: Originally posted by ÔÂÖ»À¶ at 2015-02-03 14:36:57
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% begin of matlab function RK4
function [Y,X]=RK4(A,B,C,D,u,Ts,X0,nn)
%   Disrcrete an continous system using Runge-Kutta-4th Method
% usually used as:
%        [Y(k),X(k)]=RK4(A,B,C,D,u(k),Ts,X(k-1))
%        [Y(k),X]=RK4(A,B,C,D,u(k),Ts,X)
%          where A B C D IS the state space description of an object
% if nargin<=5;
%      ts=.1,X0=zeros(length(A),1);
% end;
if nargin==7
    nn=10;
end;
tss=Ts/nn;
for i=1:nn;
    k1=(A*X0+B*u);
    k2=(A*(X0+tss*k1/2)+B*u);
    k3=(A*(X0+tss*k2/2)+B*u);
    k4=(A*(X0+tss*k3)+B*u);
    X=X0+(k1+k2*2+k3*2+k4)*tss/6;
    X0=X;
end;
Y=C*X+D*u;
% end of matlab function RK4

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12Â¥2015-02-04 17:55:48
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ÒýÓûØÌû:
12Â¥: Originally posted by 7888 at 2015-02-04 17:55:48
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% begin of matlab function RK4
function =RK4(A,B,C,D,u,Ts,X0,nn)
%   Disrcrete an continous system using Runge-Kutta-4th Met ...

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13Â¥2015-02-04 18:47:34
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14Â¥2015-02-04 21:54:33
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15Â¥2015-03-03 19:18:10
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