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What does the term 'gain margin' refer to in control systems?

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Question: What does the term \'gain margin\' refer to in control systems?

Options:

  1. The amount of gain increase before the system becomes unstable.
  2. The maximum gain of the system.
  3. The ratio of output to input.
  4. The phase shift at which the system is stable.

Correct Answer: The amount of gain increase before the system becomes unstable.

Solution: 

Gain margin is the amount of gain increase that can be applied to a system before it becomes unstable.

What does the term 'gain margin' refer to in control systems?

Practice Questions

Q1
What does the term 'gain margin' refer to in control systems?
  1. The amount of gain increase before the system becomes unstable.
  2. The maximum gain of the system.
  3. The ratio of output to input.
  4. The phase shift at which the system is stable.

Questions & Step-by-Step Solutions

What does the term 'gain margin' refer to in control systems?
  • Step 1: Understand that 'gain' refers to how much a system amplifies a signal.
  • Step 2: Know that 'gain margin' is a measure of how much more gain can be added to a system.
  • Step 3: Realize that if you increase the gain too much, the system can become unstable.
  • Step 4: Gain margin tells us the maximum increase in gain before instability occurs.
  • Gain Margin – Gain margin is a measure of how much gain can be increased in a control system before it reaches instability.
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