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The open-loop transfer function of a unity feedback control system is
G(s) = 1 (s + 2)2
The closed loop transfer function will have poles at
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- – 2, – 2
- – 2, – 1
- – 2, ± j
- – 2, 2
Correct Option: C
| G(s) = | ||
| (s + 2)2 |
| M(s) = | ; H (s) = 1 | |
| 1 + G (s) H (s) |
| ∴ M(s) = | = | |||
| 1 + G(s) | 1 + 1 /(s + 2)2 |
| = | ||
| (s + 2)2 + 1 |
The poles are at – 2, ± j1.
