Control System Objectives Part 07
121 . Which one of the following must have negative real parts for a stable system? The system eigen values.
122 . A type 1 system under parabolic input will have actuating signal which will increase with time.
123 . The transfer function of a system is10(1+0.2s)1+0.5π The phase shift at w=0 and w=β be(none of the above)
124 . The Bode plot of a transfer function G(s)=s is 20 dB/decade and phase shift of Ο/2.
125 . The decade frequency range is specified by π°πππ=10
.
126 . It is found that the complete response of a system is given by the following equation Y(t)= 5 + 3 sin (κt + πΏ1) +e-3tsin (κt + πΏ20+ e5t) The steady state part of the above expression is given by5 + 3 sin (κt + πΏ1)
127 . The servo systems with step acceleration input is a type 2 system.
128 . Which of the following is the source of non-linearity? Backlash in gears, Threshold in seasons & Saturation in effects in amplifiers (All of the above).
129 . A differentiator is usually not a part of a control system because it increases input noise.
30 . Frequency domain analysis is preferred when dealing with systems having input as sinusoidal with variable frequency and amplitude.
131 . A system is critically damped. Now if the gain of the system is increased the system will behave as under damped.
132 . The transfer function for the circuit shown in Fig. 26 when there is no external load, will be
κπ¨κπ’=ππ»ππ»πs2+π»ππ+π
133 . The response of a control system having damping factor as unity will be critically damped.
Questions 134 to 136 refer to Fig. 27
134 . The unit impulse test signal is represented by figure C.
135 . The ramp test signal is represented by Figure B.
136 . Damping is proportional toπβππππ.
137 . Integral error compensation in a control system minimize steady state error.
138 . For the mechanical system shown in Fig. 28 (a) as the force voltage analogous circuit is represented by (in Fig. 28 (b) ) Figure C.
139 . Which of the following is not in frequency domain? Root Locus Plot.
40 . The torque speed characteristics of ac servo motor is closer to Curve C.
