%
% Flexible space structure
% 

A1=[   0     1     0     0 ;
    -0.1764  0     0     0 ;
       0     0     0     1 ;
       0     0  -0.1764  0 ]

A2=[0  0  0  0;
    0  0  0  0;
    0  0  0  0;
    0  0  0  0]

A4=[  0    1    0    0 ;
    -4.41  0    0    0 ;
      0    0    0    1 ;
      0    0  -4.41  0 ]

A3=[0  0  0  0 ;
    0  0  0  0 ;
    0  0  0  0 ;
    0  0  0  0 ]

A=[A1  A2;
   A3  A4]