Which of following error integral is considered as the best criterion in controller settings ?
Correct answer: D. ∫0 ∞ e2 dt
- A. ∫0 ∞ |e| dt
- B. ∫0 ∞ |e2| dt
- C. None of these
- D. ∫0 ∞ e2 dt
Explanation
The integral of squared error, ISE, heavily penalises large errors and is a widely used criterion for controller tuning. It is written as ∫₀∞ e² dt, whereas the absolute-error criterion uses ∫₀∞ |e| dt.
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