# GATE Questions & Answers of Signal flow graph

## What is the Weightage of Signal flow graph in GATE Exam?

Total 5 Questions have been asked from Signal flow graph topic of Control Systems subject in previous GATE papers. Average marks 1.60.

By performing cascading and/or summing/differencing operations using transfer function blocks G1(s) and G2(s), one CANNOT realize a transfer function of the form

For the signal flow graph shown in the figure, the value of $\frac{C\left(s\right)}{R\left(s\right)}$ is

The position control of a DC servo-motor is given in the figure.The values of parameters are $K_T=1\;\mathrm N\operatorname{- }\mathrm m/\mathrm A,\;R_a=1\mathrm\Omega,\;L_a=0.1\mathrm H,\;J=5\mathrm{kg}-\mathrm m^2,\;B=1\;\mathrm N\operatorname{- }\mathrm m/$ (rad/sec) and $K_b=1\mathrm V/$ (rad/sec). The steady-state position response (in radians) due to unit impulse disturbance torque ${T}_{d}$ is ________.

The input-output transfer function of a plant $H\left(s\right)=\frac{100}{s{\left(s+10\right)}^{2}}$  The plant is placed in a unity negative feedback configuration as shown in the figure below

The signal flow graph that DOES NOT model the plant transfer function H(s) is

The input-output transfer function of a plant $H\left(s\right)=\frac{100}{s{\left(s+10\right)}^{2}}$  The plant is placed in a unity negative feedback configuration as shown in the figure below