1. Using block diagram reduction technique find closed loop transfer function of the system whose block diagram is shown in Fig. 1.
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).
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.
Verify your result by using block diagram reduction techniques in MATLAB to obtain the overall transfer function between input and output.