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+//Caption:overall_transfer_function_of_given_system

+//example 5.9.8

+//page 105

+syms Rf Ra Kb Jm Lf La Kg Kt Jl s

+Rf=1000;//field_resistance

+Lf=100;//field_inductanc

+Kg=1000;//generator_field_constant

+Ra=20;//armature_resistance

+La=0.1;//armature_inductance

+Kt=1.2;//motor_torque_const

+Kb=1.2;//motor_back_emf_const

+Jl=0.00003;//moment_of_inertia

+Jm=0.00002;//coeff_of_viscous_friction

+a=Kt/(Ra+s*La);

+b=1/((Jm+Jl)*s);

+c=(a*b);

+d=c/(1+c*Kb);

+e=Kg/(Rf+s*Lf);

+f=(d*e);

+f=simple(f)

+disp(f,"wss(s)/Vf(s)=");

+

+//steady state value

+disp("under steady state condition, on putting s=0 in expression f,we get:")

+disp("Vf=1.2*wss")
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