Hello, if there are forces of masses in our system, how can we transfer them to the transfer function or do we need to back them up? For example, let the differential equations for a system with two degrees of freedom be as follows; m1*x1dd+d1*x1d+k1*x1+2*k1*x2+m1*g = 0---->(1) (m1+m2)*x2dd+d2*x2d+k1*x2 + 3*k1*x1 + m2*g = M---->(2) Things get very complicated here when you take into account the expressions m1*g and m2*g. How can the transfer function of such a system be derived? Thanks for your help.
