GATE ECE
Control Systems
Basic of Control Systems
Previous Years Questions

## Marks 1

Consider a stable system with transfer function $$G\left(s\right)=\frac{s^p+b_1s^{p-1}+....+b_p}{s^q+a_1s^{q-1}+....+a_q}$$$Where$$b_1,.......,b_p$...
For the system shown in the figure, Y (s) / X (s) = __________. ...
The impulse response of an LTI system can be obtained by
Negative feedback in a closed-loop control system DOES NOT
Despite the presence of negative feedback, control systems still have problems of instability because the
The transfer function of a tachometer is of the form
The transfer function of a linear system is the
Tachometer feedback in a d.c. position control system enhances stability.

## Marks 2

Let x(t) be the input to a linear, time-invariant system. The required output is 4x(t-2). The transfer function of the system should be
A linear time invariant system has an impulse response e2t, t > 0. If the initial conditions are zero and the input is e3t, the output for t > 0...
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