Control Systems 1

Which type of control system is more sensitive to disturbances and system parameter variations?

• Open-loop system

• Closed-loop system

• MIMO system

• Servo system

Which of the following is NOT true about open-loop control systems?

• They are easier to design.

• They are more prone to system disturbances.

• They are more accurate.

• They cannot compensate for external disturbances.

The poles of a system's transfer function determine the:

• Stability and transient response

• Steady-state response only

• The values of s where the numerator of the transfer function becomes zero.

• Open-loop gain

• The values of s where the denominator of the transfer function becomes zero

In the transfer function of a system, zeros refer to:

• Values of s that make the denominator zero

• The time taken to reach steady state

• Values of s that make the numerator zero

• The steady-state error

Which of the transfer functions of the item 1) corresponds to an underdamped second-order system?

• a

• b

• c

• d

Which of the transfer functions of the item 1) corresponds to an undamped second-order system?

• a

• b

• c

• d

In block diagram reduction, when two blocks are connected in parallel, their transfer functions are:

• Added

• Multiplied

• Divided

• Subtracted

If two blocks are connected in series in a block diagram, their equivalent transfer function is:

• The sum of individual transfer functions

• The product of individual transfer functions

• The difference of individual transfer functions

• The inverse of the individual transfer functions

The unity feedback system of item 2) has a transfer function G(s)=1/(sT) in the forward path. The overall transfer function is given by:

• 1/(sT-1)

• 1/(sT+1)

• 1/sT

• 1/2sT

Block diagram reduction is mainly used to:

• Improve system speed

• Simplify the calculation of the overall system transfer function

• Increase system stability

• Identify state variables