Name of the College : MAM School of Engineering
University : Anna University Chennai
Subject Code/Name : EE2365-Control Engineering
Dept : AERONAUTICAL ENGINEERING
Degree : B.E
Year/Sem: III/V
Website : mamse.co.in
Document Type : Question Bank
Download Model Question Paper : https://www.pdfquestion.in/uploads/mamse.co.in/3202-EE2365.pdf
MAM Control Engineering Question Paper
Year : III Semester : V
Degree & Branch : B.E. & AERONAUTICAL
Part A
1. What is control system?
A system consists of a number of components connected together to perform a specific function. In a system when the output quantity is controlled by varying the input quantity then the system is called control system.
Related : MAM School of Engineering AE2303 Aerodynamics B.E Sample Question Paper : www.pdfquestion.in/3201.html
2. What are the two major types of control system?
The two major types of control system are open loop and closed loop
3. Define open loop control system.
The control system in which the output quantity has no effect upon the input quantity is called open loop control system. This means that the output is not feedback to the input for correction.
4. Define closed loop control system.
The control system in which the output has an effect upon the input quantity so as to maintain the desired output value is called closed loop control system.
5. What are the components of feedback control system?
The components of feedback control system are plant, feedback path elements, error detector and controller.
7. Why negative feedback is invariably preferred in closed loop system?
The negative feedback results in better stability in steady state and rejects any disturbance signals.
8. Define transfer function.
The transfer function of a system is defined as the ratio of the Laplace transform of output to Laplace transform of input with zero initial conditions.
9. What are the basic elements used for modeling mechanical translational system.
Mass, spring and dashpot.
10. What are the basic elements used for modeling mechanical rotational system?
Moment of inertia J, dashpot with rotational frictional coefficient B and torsional spring with stiffness K.
11. Write the force balance equation of an ideal mass element.
F = M d2x/dt2
12. Write the force balance equation of ideal dashpot element.
F = B dx/dt
13. Write the force balance equation of ideal spring element.
F = kx
14. Name two types of electrical analogous for mechanical system.
The two types of analogies for the mechanical system are Force voltage and force current analogy.
15. Write the analogous electrical elements in force voltage analogy for the elements of mechanical
translational system.
a. Force-voltage e
b. Velocity v-current i
c. Displacement x-charge q
d. Frictional coefficient B-Resistance R
e. Mass M- Inductance L
f. Stiffness K-Inverse of capacitance 1/C
16. Write the analogous electrical elements in force current analogy for the elements of mechanical translational system.
a. Force-current i
b. Velocity v-voltage v
c. Displacement x-flux f
d. Frictional coefficient B-conductance 1/R
e. Mass M- capacitance C
f. Stiffness K-Inverse of inductance 1/L
Part B
1. Determine the transfer function X1(S) / F(S) and X2(S) / F(S) of the mechanical system shown in figure.
2. Write the governing differential equations of the mechanical system shown in figure.
3. Write the governing differential equations of the mechanical system shown in figure.
4. Write the governing differential equations of the mechanical system shown in figure.
5. Obtain the closed loop transfer function C(S) / R(S) of the system whose block diagram is shown in figure. Use Block diagram reduction technique and verify the transfer function with signal flow graph technique.
6. Derive the transfer function of
i. Armature controlled d.c. motor
ii.Field control d.c. motor with necessary block diagram
7. Explain the rules for block diagram reduction.
8. Determine the transfer function of the system shown in the following figure.
9. Measurements are conducted on a servomechanism show the system response to be C(t) = 1 + 0.2 e- 60t – 1.2 e- 10t when subjected to unit step input.
i. Obtain the expression for the closed loop transfer function.
ii. Determine the undamped natural frequency and damping ratio of the system.
10. Obtain the unit impulse response and unit step response of a unity feedback system whose open loop transfer function is G(s) = (2 s + 1) / s2.