Control Systems MCQ Questions & Answers | ECE

The state model
\[\begin{array}{l} x\left( {k + 1} \right) = \left[ {\begin{array}{*{20}{c}} 0&1\\ { - \beta }&{ - \alpha } \end{array}} \right]x\left( k \right) + \left[ \begin{array}{l} 0\\ 1 \end{array} \right]u\left( k \right)\\ y\left( k \right) = \left[ {0\,\,\,1} \right]\left[ {\begin{array}{*{20}{c}} {{x_1}}&{\left( k \right)}\\ {{x_2}}&{\left( k \right)} \end{array}} \right] \end{array}\]
is represented in the difference equation as

The state equation of a second-order linear system is given by, \[\mathop x\limits^ \cdot \left( t \right) = Ax\left( t \right),\,x\left( 0 \right) = {x_0}\]
For \[{x_0} = \left[ \begin{array}{l} 1\\ - 1 \end{array} \right],\,x\left( t \right) = \left[ \begin{array}{l} {e^{ - t}}\\ - {e^{ - t}} \end{array} \right]\]       and for \[{x_0} = \left[ \begin{array}{l} 0\\ 1 \end{array} \right],\,x\left( t \right) = \left[ \begin{array}{l} {e^{ - t}} - {e^{ - 2t}}\\ - {e^{ - t}} + {e^{ - 2t}} \end{array} \right].\]
When \[{x_0} = \left[ \begin{array}{l} 3\\ 5 \end{array} \right],\,x\left( t \right)\]    is

By adding zero to the system transfer function, the improvement to transient response is called as:

Settling time is the time required for the system response to settle within a certain percentage of:

In position control system, the device used for providing rate feedback voltage is called-

The given figure represents:

Consider the following statements:
The effect of phase lead network is given as:
1. Increased velocity constant.
2. Increased phase margin.
3. Increased bandwidth.
4. Slower response.
Which of the above statements are correct?

The transfer function of a phase lead controller is $$\frac{{1 + 3Ts}}{{1 + Ts}}.$$   The maximum value of phase provided by this controller is

The transfer function of a first-order process is given by $$\frac{{Y\left( s \right)}}{{R\left( s \right)}} = G\left( s \right) = \frac{K}{{\tau s + 1}}$$
Then the impulse response to an impulse strength of 5 is