1. Using block diagram reduction technique find closed loop transfer function of the system whose block diagram is shown in Fig. 1.
![398_Find closed loop transfer function of the system.png](https://secure.tutorsglobe.com/CMSImages/398_Find%20closed%20loop%20transfer%20function%20of%20the%20system.png)
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).
![1783_Find closed loop transfer function of the system1.png](https://secure.tutorsglobe.com/CMSImages/1783_Find%20closed%20loop%20transfer%20function%20of%20the%20system1.png)
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.
![1595_Find closed loop transfer function of the system2.png](https://secure.tutorsglobe.com/CMSImages/1595_Find%20closed%20loop%20transfer%20function%20of%20the%20system2.png)
Verify your result by using block diagram reduction techniques in MATLAB to obtain the overall transfer function between input and output.