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4Â¥: Originally posted by FelixÖì·É at 2012-10-11 18:19:40
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%WSA_H: Workspace Analysis of Heel
%Direct Kinematic of 3-FB Leg
syms x1 y1 z1 x2 y2 z2 x3 y3 z3 xh yh zh l1 l2 l3;

%Coordinates of the points(P1, P2, P3)
x1=100*sqrt(3); y1=0; z1=0;
x2=0; y2=-100; z2=0;
x3=0; y3=100; z3=0;

%Lengths of three links
%Range of link-length
L_min=300;                        %the minimum length of link
L_stroke=150;                     %the stroke of actuactor
L_inc=2;                         %the increment per step
L_max=L_min+L_stroke;                        %the maximum length of link
l1=L_min;l2=L_min;l3=L_min;
RLL=L_min:L_inc:L_max;

%Arrays of three links
L1=zeros(length(RLL)*length(RLL)*length(RLL),1);
L2=zeros(length(RLL)*length(RLL)*length(RLL),1);
L3=zeros(length(RLL)*length(RLL)*length(RLL),1);
i=0;
for l1=RLL;
    for l2=RLL;
        for l3=RLL;
            i=i+1;
            L1(i)=l1;
            L2(i)=l2;
            L3(i)=l3;
        end
    end
end

%Coordinate of the point H
xh=zeros(length(RLL)*length(RLL)*length(RLL),1);
yh=zeros(length(RLL)*length(RLL)*length(RLL),1);
zh=zeros(length(RLL)*length(RLL)*length(RLL),1);

i=0;
for l1=RLL;
    for l2=RLL;
        for l3=RLL;
            i=i+1;
            yh(i)=(-l2^2+l3^2+y2^2-y3^2)/(2*(y2-y3));
            xh(i)=(-l1^2+l2^2+x1^2-y2^2+2*y2*yh(i))/(2*x1);
            zh(i)=sqrt(l3^2-xh(i)^2-(yh(i)-y3)^2);   
        end
    end
end
8Â¥2013-03-05 23:41:43
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2Â¥: Originally posted by ynod23 at 2012-10-11 17:26:23
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