For the antenna control system of Problem 7.5-5 and Fig. P7.5-5, let K = 1 . Problem

Question:

For the antenna control system of Problem 7.5-5 and Fig. P7.5-5, let K = 1 . (a) The frequency response for was calculated by computer and is given in Table P7.7-2. G(z) Sketch the (c) If the system is stable, determine the gain and phase margins. If the system is unstable, find the value TABLE P7.7-2 Frequency Response for Problem 7.7-2 G 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 2.0 3.0 4.0 5.0