A second order system has poles s = -1 ± 2j. What is the 1% settling time of a step input in seconds? (a) ts = 1.2 (b) ts = 2.3 (c) ts = 4.6 (d) ts = 9.2 (e) none of the above
a) ts = 1.2
b) ts = 2.3
c) ts = 4.6
d) ts = 9.2