printf("closed loop transfer function =K/(s^2+K*H*s+K))");
printf("characterstic equation of the given system is s^2+K*H*s+K=0");
printf("compare it with the standard second order characterstic equation s^2+2*d*w*s+w^2=0");
d1=log(0.25);
d=sqrt(d1^2/(d1^2+%pi^2));
w=%pi/(2*sqrt(1-d^2));
K=w^2;
H=2*d*w/K;
disp(d,"damping ratio=");
disp(w,"undamped natural frequency(in rad/sec)=");
disp(K,"value of K=");
disp(H,"value of H=");