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A cassette tape storage device has been designed for mass-storage. It is necessary to control accurately the velocity of the tape. The speed control of the tape drive is represented by the system shown in Figure 4.
Figure 4
(a) Determine the limiting value of K for a stable system
[8 marks]
(b) Assuming K to be 1000, sketch the Bode diagram of the system.
[12 marks]
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(c) Determine and indicate on the graph, the phase and gain margins, if they exist.
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