Discussion
The parameters associated with time response of control system are
(i) Delay time (td)
(ii) Settling time (ts )
(iii) Rise time (tr )
(iv) Peak time (tp) Arrange the above in the order, the parameter which is having minimum time to the parameter which has got the maximum time.
Answer: D
From the smallest time to the largest the order is delay time, rise time, peak time and settling time, which is (i), (iii), (iv), (ii), the fourth option. The delay time is the time to reach half of the final value, the rise time is the time to go from 10 to 90 per cent, the peak time is when the first peak occurs, and the settling time is when the response stays within the tolerance band.
The other options put the settling time or the peak time before the rise time, which is not the usual sequence.
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