GATE ECE
Control Systems
Signal Flow Graph and Block Diagram
Previous Years Questions

## Marks 1

The block diagram of a feedback control system is shown in the figure. The overall closed-loop gain G of the system is ...
By performing cascading and/or summing/differencing operations using transfer function blocks G1(s) and G2(s), one CANNOT realize a transfer function ...
For the signal flow graph shown in the figure, the value of $$\frac{\mathrm C\left(\mathrm s\right)}{\mathrm R\left(\mathrm s\right)}$$ is ...
Consider the following block diagram in the figure. The transfer function $$\frac{\mathrm C\left(\mathrm s\right)}{\mathrm R\left(\mathrm s\right)}... For the following system, When X1(s) = 0 , the transfer function$$\frac{\mathrm Y\left(\mathrm s\right)}{{\mathrm X}_2\left(\mathrm s\right)}$$is ... The transfer function Y(s)/R(s) of the system shown is ... The equivalent of the block diagram in Figure is given as ... Signal flow graph is used to find ## Marks 2 The signal flow graph for a system is given below. The transfer function$$\frac{Y(s)}{U(s)}$$for this system is ... Consider the signal flow graph shown in Figure. The gain$$\frac{x_5}{x_1}$$is ... The signal flow graph of a system is shown in figure. The transfer function$$\frac{C(s)}{R(s)}$$of the system is ... An electrical system and its signal-flow graph representations are shown in Figure (a) and (b) respectively. The values of G2 and H, respectively are ... In the signal flow graph of Fig. y/x equals ... In the signal flow graph of Figure, the gain c/r will be ... In the signal flow graph shown in fig X2= TX1 where T is equal to ... For the system shown in figure the transfer function$$\frac{\mathrm C\left(\mathrm s\right)}{\mathrm R\left(\mathrm s\right)}$$is equal to ... ## Marks 5 A feedback control system is shown in figure (a) Draw the signal-flow graph that represents the system. (b) Find the total number of loops in the gra... Draw a signal flow graph for the following set of algebraic equations:$$$\begin{array}{l}y_2=ay_1-\;gy_3\\y_3=ey_2+\;cy_4\\y_4=by_2-dy_4\end{array}$\$...
Reduce the signal flow graph shown in fig. below, to obtain another graph which does not contain the node e5.Also, remove any self-loop from the resul...
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