Hi! I've a very big eight dimensional nonlinear system and I want to transform it into a Matrix xdot = F(x)+B(x)*U On a little example:
xdot1 = x^3+u^2*(x+3x^2)+ bx
xdot2 = x^2+u*x^2 + b*x
F1(x) = x^3; B1(x) = {x+3x^2 , x }; U = {u,b} // First column
F2(x) = x^2; B2(x) = {x^2, x} // Second column
I have tried with:
F1 = xdot1/.b-> 0 /. u -> 0
B11 = xdot1-fx /.b-> 0
B12 = xdot1-F1/.u->0
but for proving this i made F1+B11u+B12b - xdot1 but the result is nonzero. Command Collect[] did not worked too...
Thanks!
