engineering recuitment BHEL Engineer Trainee Mock Test 2025 Control Systems Basics of Control Systems Sensitivity
A unity feedback control system has an open-loop transfer function
\(G\left( s \right) = \frac{A}{{s\left( {s + a} \right)}}\)
The sensitivity of the closed-loop transfer function to the changes in the parameter 'a' is1
\(\frac{{ - A}}{{{{\left( {s + a} \right)}^2}}}\)
2
\(\frac{{ - a}}{{\left( {s + a} \right)}}\)
3
\(\frac{{ - As}}{{{{\left( {{s^2} + as + A} \right)}^2}}}\)
4
\(\frac{{ - as}}{{\left( {{s^2} + as + A} \right)}}\)