How the steady state respons eof the ODE can be calculated (EXCLUDING TRANSIENT RESPONSE)

Hi everyone!

Actually, I want to calculate the steady state response of the Ordinery Differential Equation of a Dynamic system (find the equation below):

syms y1(t);

Dy1 = diff(y1);

ode1 = diff(y1,t,2)+2*kisi*omega*diff(y1,t,1)+(omega^2)*y1== (135.89793*cos(10.4876*t)*sin(0.17112488*t))/867.5;

cond1 = y1(0)==0;

cond2 = Dy1(0)==0;

conds1 = [cond1 cond2];

y1Sole(t)=dsolve(ode1, conds1);

However, the 'dsolve' in matlab calculates both of the TRANSIENT nad STEADY STATE response of the ODE.

(I only want to get Steady state response of the equation not both!)

Thanks everyone!

[Star Strider]

Unrecognized function or variable 'kisi'.

[Torsten]

I doubt that a steady-state for the ODE exists.