Exercise $4$: Cruise System

As we know in the cruise system, the spring force $F_s(x)=0$ which means that $K=0.$ Equation $(2)$ becomes

$M\frac{d^{2}x(t)}{d{t}^2}+B\frac{dx(t)}{dt}=F_u(t)$

or

$M\frac{dv(t)}{al}+Bv=F_a()$

Find the velocity response of the above system by constructing a Simulink block diagram and calling the block diagram from Matlab m$-$file. Use $M=750,B=30$ and a constant force $Fa=300.$ Plot the response of the system such that it runs for $125$ seconds.