AE6505 Control Engineering
Third year, Department of Aeronautical
Engineering
First and second Units Questions.
PART A(10*2=20)
1.      What are the advantages of the closed loop control system?
2.      Write the Mason’s gain formula of signal flow graph.
3.      What is control system?
4.      What is transmittance?
5.      Define non- touching loop.
6.      Why negative feedback is invariably preferred in closed loop system?
7.      What is a signal flow graph?
8.      What are the basic properties of signal flow graph?
9.      Distinguish the difference between hydraulic and pneumatic system.
10.  Define hydraulic resistance and hydraulic capacitance.
PART B(5*16=80)
1.      Write the differential equations governing the mechanical system shown in figure. Draw the force – voltage and force – current analogous circuits and verify by writing mesh and node equations.                                                                      (16)
2.       Obtain the closed loop transfer function Y(S) / R(S) of the system whose block diagram is shown in figure.  Use Block diagram reduction technique.                                       (16)
3.      What is thermal system? Draw and explain in detail about thermal system.(16)
4.      Find overall gain of the system whose signal flow graph is shown in figure.
(16)
5.   Write the differential equations governing the Mechanical system shown in fig.
and determine the transfer function. (16)