### Control Systems Objectives Part 06

**101 . ** The damped frequency of oscillation is **6 radians per second.**

**102 .** The damping ratio is **0.8.**

**103 .** If the damping ratio is not to be less than 0.4, the loop gain can be increased **10 times.**

**104 . ** **The gain for transfer function**P(s) =2(π +2)For κ=1 will be** 0.894**

**105 . ** In the above case phase shift will be**tan**–**1ππ.**

**106 . ** A zero-order hold is used with sampled data systems **to reconstruct the sampled signal.**

**107 .** A servo-mechanism with unit step input can be categorized as **type 1 system.**

**108 .** **Ratio of the Laplace transform of the system response to the Laplace transform of the system input function** defines a transfer function.

**109 . ** What fraction of derivative of error will be needed in order to produce a damping ratio** 0.5? **0.08.

**110 . ** A type 1 system under steady state will have position error when there is** ramp input.**

**111 .** Analysis of control systems by Laplace transform technique is not possible for** Discrete time systems.**

**112 . ** A control system in which the control action is somehow dependent on the output is known as **closed loop system.**

**113 . ** The octave frequency range is specified by π°πππ=2

**114 .** The damping factor of a system is unity. The system is** critical damped.**

**115 .** The presence of feedback in control system** reduces distortion and increases bandwidth.**

**116 . ** For type 1 system, the steady state acceleration error is** infinite.**

**117 .** A stepper motor is a **kind of rotating amplifier.**

**118 .** The transfer function for the circuit shown in Fig.25, when there is no external load, will be**κπ¨κπ’= π π+πππππ+ππΉππͺπ«[a=R2R1+R2]**

**119 .** A type 0 system under step input has **step output with constant actuating signal.**

**20 . ** 1n control system we haveI. Nyquist criterionII. Bode PlotIII. Root Locus Plot

IV. Routh Hermitzβs criterionWhich of the above are in time domain? **II and IV only.**