Control System Objectives Part 12

221 . The time required to reach the peak output is 1.045 seconds.

222 . In the above system, now a derivative component having transfer function of 𝑠10 is introduced in the system. Now the damping ratio will be 1.05.

223 . It can be concluded that as a result of above, the system has become overdamped.

224 . The natural frequency will remain unchanged.

225 . As a result of above the time to reach the peak overshoot is reduced.

226 . As a result of the above the value of percentage peak overshoot is reduced.

227 . The effect of error rate damping is to reduce steady state error.

228 . For type 3 system the asymptote at lower frequency will have a slope –18 dB/ octave.

229 . The effect of adding poles and zeros can be studied quickly for determining phase and gain margin from Bode plot.

230 . The effect of addition of pole and zero on phase margin and gain margin can be most conveniently seen in Bode plot.

231 . Low friction coefficient in a system facilitates reduced velocity lag error.

232 . The characteristic equation having more number of poles than zeros, the number of root locus branches will be equal to no of poles.

233 . Hydraulic torque transmission system is analog Motor generator set.

234 . The phase shift of third order system having transfer function as s-3 will be -270.

235 . The unity circle of Nyquist plot corresponds to the 0 dB line of the Bode plot for both low as well as high frequencies.

236 . A 1000 turns potentiometer is excited by 10 V source, its percentage resolution will be 0.1 %.

237 . In root locus plot the angle of asymptote is 360 divided by (no of poles -no of zeros).

238 . The negative real axis of Nyquist plot corresponds to a negative 180 phase line of Bode plot.

239 . Which of the following will increase the steady state accuracy? Integrator.

240 . In system using relays, the signals in the part of the system are in the form of rectangular wave with polarity depending upon that of the actuating signal.