Control Systems 1

Which of the following is an example of an open loop system?

• Household Refrigerator
• Respiratory system of an animal
• Stabilization of air pressure entering into the mask
• Execution of program by computer

The mechanism of control of body temperature is non feedback system?

• True
• False

Benefits of feedback:

• Performance of system is greater.
• Need for system much larger path gain and system instability.
• Controlled variable accurately follows the desired value
• Affected by parameter variations

Feedback can cause a system that is originally stable to become___________

• Stable
• Unstable
• Conditionally stable
• Either more stable or unstable

Zero initial condition for a system means

• Input reference signal is zero
• Zero stored energy
• Initial movement of moving parts
• System is at rest and no energy is stored in any of its components

Transfer function of a system is used to calculate which of the following?

• The order of the system
• The time constant
• The output for any given input
• The steady state gain