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Control SystemsTransfer Functions

For forward transfer function G(s) and negative feedback H(s), the closed-loop transfer function C(s)/R(s) is?

  • AG(s)/(1+G(s)H(s))
  • BG(s)/(1-G(s)H(s))
  • CH(s)/(1+G(s))
  • DG(s)H(s) only
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Correct Answer: A. G(s)/(1+G(s)H(s))
Explanation: For standard negative feedback, the closed-loop transfer function is G/(1+GH).
Reference: Standard control systems: transfer functions
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