Abstract :
The problem of finding the steady-state solution x(t) of the equation P^x(t) = Q^f(t) is studied, where f(t) is a periodical excitation, and P^and Q^are ordinary linear differential operators with constant coefficients For this purpose, a Green´s function is constructed, which is the solution of the problem when the excitation f(t) consists of periodically applied pulses. This Green´s function is then used in a convolution integral to find the steady-state solution for any periodical f(t).
