I edited a .ssc file for simscape to represent a piecewise linear stiffness spring,but there is always something wrong, when the stiffness changed, the deformation of the spring changed suddenly too(diminishing), and here is the code, can someone help me? Thanks a lot!
component nlspring < foundation.mechanical.translational.branch
parameters
spr_rate1 = { 2500, 'N/m' };
spr_rate2 = { 4000, 'N/m' };
init_def = { 0, 'm' };
change_def = { 2.5e-3, 'm' };
end
variables
x = { 0, 'm '};
end
function setup
if spr_rate1 <= 0
pm_error('simscape:GreaterThanZero','spr_rate1' )
end
if spr_rate2 <= 0
pm_error('simscape:GreaterThanZero','spr_rate2' )
end
if change_def <= 0
pm_error('simscape:GreaterThanZero','change_def ' )
end
end
equations
if abs(x) < change_def
f == spr_rate1*x;
v == x.der;
else
f == spr_rate2*x;
v == x.der;
end
end
end
