### 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 functionP(s) =2(𝑠+2)For ꙍ=1 will be 0.894

105 . In the above case phase shift will betan1𝟏𝟐.

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 𝐰𝟐𝒘𝟏=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
Ꝋ𝐨Ꝋ𝐢= 𝒂 𝟏+𝐑𝟏𝐂𝐃𝟏+𝒂𝑹𝟏𝑪𝑫[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 Hermitz’s criterionWhich of the above are in time domain? II and IV only.