List of top Measurements and Control Systems Questions on Control Systems

A control system shown in the figure below has a forward gain \(G = 100\). An input \(V_{in} = 5\) volts is supplied to the system. What is the absolute error between the output \(V_{out}\) and input \(V_{in}\) in volts?
Consider a unity feedback system with closed-loop transfer function \[ C(s) = \frac{s + 90}{s^2 + 10s + 90} \] The steady-state error with respect to a unit ramp input is \(\underline{\hspace{2cm}}\). (rounded off to one decimal place)
The closed-loop characteristic equation of a system is given by \[ s^4 + 2s^3 + 8s^2 + 8s + 16 = 0 \] The frequency of oscillations of this closed-loop system at steady state is \(\underline{\hspace{2cm}}\) rad/s.
Consider a type 2, unity feedback system. The intersection of the initial -40 dB/dec segment of its Bode plot with the zero dB line occurs at a frequency of 2 rad/s. The acceleration error constant of the system \(K_a\) is \(\underline{\hspace{2cm}}\).
For a linear stable second order system, if the unit step response is such that the peak time is twice the rise time, the system is \(\underline{\hspace{2cm}}\).