The initial slope of the Bode plot gives an indication of

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BHEL Engineer Trainee Electrical 2019 Paper
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  1. type of the system
  2. nature of the system time response
  3. system stability
  4. order of the system

Answer (Detailed Solution Below)

Option 1 : type of the system
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The type of system is the number of poles present at the origin in the open-loop transfer function.

In Bode plot,

  • The initial slope for each pole at origin is -20 dB/decade or -6 dB/octave.
  • The initial slope for each zero at origin is +20 dB/decade or +6 dB/octave.
  • The initial slope is zero if there are no poles or zeros at the origin.

 

The initial shape of the Bode plot gives an indication of the type of the system.

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