1. Using block diagram reduction technique find closed loop transfer function of the system whose block diagram is shown in Fig. 1.
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2. The signal flow graph for a feedback control system is shown in Fig. 2. Determine the closed loop transfer function C(s)/R(s).
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3. The block diagram of a closed loop speed control of an armature controlled DC motor is shown in Fig.3. Convert the block diagram to a signal flow graph and determine transfer function using Mason's gain formula and given parameters.
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Verify your result by using block diagram reduction techniques in MATLAB to obtain the overall transfer function between input and output.