### 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.**