A unity feedback system has a loop transfer function where K 1 2and T 1 The polar plot for Gc(j Iuml )G(ja Iuml ) is shown in Figure E9 24 Determine whether the system is stable by using the Nyquist criterion FIGURE E9 24 Polar plot for Gc(s)G(s) K ( 1 TS) L(s) Gc(s)G(s) 1 s , 0 2

Question: A unity feedback system has a loop transfer function where K = 1 / 2and T = 1. The polar plot for Gc(jÏ)G(jaÏ) is shown

A unity feedback system has a loop transfer function

where K = 1 / 2and T = 1. The polar plot for Gc(jÏ‰)G(jaÏ‰) is shown in Figure E9.24. Determine whether the system is stable by using the Nyquist criterion.

A unity feedback system has a loop transfer function
where K

FIGURE E9.24
Polar plot for Gc(s)G(s) = K/(-1 + TS).

L(s) = Gc(s)G(s)--1-s , 0 2

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