1. The condition under which the error signal of a feedback control system would not be the difference between the input and the output is
• when both the input and output transducers have unity gain
• when the input and output transducers have non-unity gain
• when the input or output transducers have non- unity gain
• when the input and/or the output transducers have non- unity gain

 

1. If the error signal is not the difference between input and output, then error signal is called
• The actuating signal.
• The reference signal.
• The controlled variable.
• The disturbance.
  
2. The advantage(s) of having a computer in the loop:
• Multiple sub systems can be controlled by the same computer through time sharing.
• Any adjustments to the controller can be implemented with simply software changes.
• Supervisory functions, such as scheduling many required-applications, can be performed.
• All of the above
  
3. The three major design criteria for control systems are.
• Stability, Sensitivity, and Steady-state error.
• Stability, Transient response, and Steady-state error
• Stability, Sensitivity, and Transient response.
• Sensitivity, Transient response, and Steady-state error.
  
4. Name the two parts of a system’s response.
• Natural , Transient
• Steady-state, Zero-state
• Transient, Steady-state
• Forced, Zero-input
  
5. Physically, the unstable system will
• destroy itself
• reach an equilibrium state because of saturation in driving amplifiers
• hit limit stops
• Either of above outcomes a, b, c.
  
6. Instability is attributable to _______part of the total response.
• Transient response
• Steady state response
• Both a and b
• Either b or a.
  
7. ________ is attributable to steady state part of the total response.
• Stability
• Accuracy
• Both a and b
• None

1. Adjustments of the forward path gain can cause changes in the transient response.
• the statement is TRUE
• the statement is FALSE
• the statement is only TRUE if feedback is unity
• none
  
2. A control system is said to be robust when

           (i)     It has low sensitivities

           (ii)   It is stable over a wide range of parameter variations

            (iii) The performance stays within prescribed (but practical) limit bounds in presence of changes in the parameters of the                      controlled system and disturbance input.

• Only (i)
• Only (ii)
• Only (iii)
• Only (i),(ii),(iii)