{"id":21246,"date":"2015-01-01T13:40:21","date_gmt":"2015-01-01T13:40:21","guid":{"rendered":"https:\/\/3-inst.toejvy8-liquidwebsites.com\/?p=21246"},"modified":"2021-11-27T17:40:44","modified_gmt":"2021-11-27T12:10:44","slug":"closed-loop-frequency-response","status":"publish","type":"post","link":"https:\/\/instrumentationtools.com\/closed-loop-frequency-response\/","title":{"rendered":"Closed-Loop Frequency Response"},"content":{"rendered":"<p><strong>Closed-Loop Frequency Response<\/strong><\/p>\n<p><span style=\"color: #ff0000;\"><strong>1. Closed loop frequency response is very useful as :<\/strong><\/span><\/p>\n<p>a) It approximately predicts the time response of the systems<br \/>\nb) Time response are converted into time domain specifications<br \/>\nc) After design time domain specification is converted into frequency domain<br \/>\nd) All of the mentioned<\/p>\n<p><strong>Answer:<\/strong> d<\/p>\n<p><strong>Explanation:<\/strong> Closed loop frequency response is very useful as it enables to use second order correlations between frequency and transient response.<\/p>\n<p><span style=\"color: #ff0000;\"><strong>2. Maximum peak overshoot in time domain corresponds to :<\/strong><\/span><\/p>\n<p>a) Resonance peak<br \/>\nb) Resonant frequency<br \/>\nc) Bandwidth<br \/>\nd) Cut-off rate<\/p>\n<p><strong>Answer:<\/strong> a<\/p>\n<p><strong>Explanation:<\/strong> Resonance peak in frequency domain correspond to maximum peak overshoot in time domain.<\/p>\n<p><span style=\"color: #ff0000;\"><strong>3. Frequency of oscillation in time domain correspond to :<\/strong><\/span><\/p>\n<p>a) Resonance peak<br \/>\nb) Resonant frequency<br \/>\nc) Bandwidth<br \/>\nd) Cut-off rate<\/p>\n<p><strong>Answer:<\/strong> b<\/p>\n<p><strong>Explanation:<\/strong> Resonant frequency in frequency domain correspond to frequency of oscillation in time domain.<\/p>\n<p><span style=\"color: #ff0000;\"><strong>4. Bandwidth is :<\/strong><\/span><\/p>\n<p>a) Range of frequencies for which the system gain is more than-3dB<br \/>\nb) This is considered good range for transmission of signals<br \/>\nc) For better communication bandwidth of signal must be less<br \/>\nd) All of the mentioned<\/p>\n<p><strong>Answer:<\/strong> d<\/p>\n<p><strong>Explanation:<\/strong> Bandwidth of a signal must be less but channel must be more foe better transmission or communication.<\/p>\n<p><span style=\"color: #ff0000;\"><strong>5. Cut-off rate is the ability of the system to distinguish the signal from _____________<\/strong><\/span><\/p>\n<p>a) Bandwidth<br \/>\nb) Noise<br \/>\nc) Resonance peak<br \/>\nd) Magnitude<\/p>\n<p><strong>Answer:<\/strong> b<\/p>\n<p><strong>Explanation:<\/strong> Cut-off rate is the ability of the system to distinguish the signal from noise.<\/p>\n<p><span style=\"color: #ff0000;\"><strong>6. The important figures of merit to the system in frequency domain are :<\/strong><\/span><\/p>\n<p>a) Maximum value of resonant peak<br \/>\nb) Value of resonance frequency<br \/>\nc) Maximum value of resonant peak and Value of resonance frequency<br \/>\nd) Minimum value of resonance frequency<\/p>\n<p><strong>Answer:<\/strong> c<\/p>\n<p><strong>Explanation:<\/strong> The important figures of merit to the system in frequency domain are maximum value of resonance peak and frequency at which it occurs.<\/p>\n<p><span style=\"color: #ff0000;\"><strong>7. In q(s) plane Nyquist plot is symmetrical about the :<\/strong><\/span><\/p>\n<p>a) Imaginary axis<br \/>\nb) Real axis<br \/>\nc) Origin<br \/>\nd) None of the mentioned<\/p>\n<p><strong>Answer:<\/strong> b<\/p>\n<p><strong>Explanation:<\/strong> By definition, In q(s) plane Nyquist plot is symmetrical about the real axis.<\/p>\n<p><span style=\"color: #ff0000;\"><strong>8. A polar plot intersects the unit circle at a point making -45\u00b0 to the negative real axis then the phase margin of the system is :<\/strong><\/span><\/p>\n<p>a) -45\u00b0<br \/>\nb) 45\u00b0<br \/>\nc) 180\u00b0-45\u00b0<br \/>\nd) 180\u00b0+45\u00b0<\/p>\n<p><strong>Answer:<\/strong> b<\/p>\n<p><strong>Explanation:<\/strong> As the angle is with the negative real axis hence the Phase margin will be 45\u00b0.<\/p>\n<p><span style=\"color: #ff0000;\"><strong>9. The parameter which is constant along the constant N circle :<\/strong><\/span><\/p>\n<p>a) Frequency<br \/>\nb) Phase angle<br \/>\nc) Magnitude<br \/>\nd) Open loop gain<\/p>\n<p><strong>Answer:<\/strong> b<\/p>\n<p><strong>Explanation:<\/strong> Phase angle remains constant in constant N-circle.<\/p>\n<p><span style=\"color: #ff0000;\"><strong>10. In second order system gain margin is :<\/strong><\/span><\/p>\n<p>a) Zero value<br \/>\nb) Finite value<br \/>\nc) Infinite value<br \/>\nd) None of the mentioned<\/p>\n<p><strong>Answer:<\/strong> c<\/p>\n<p><strong>Explanation:<\/strong> Gain margin is defined generally for systems with order greater than 3.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Closed-Loop Frequency Response 1. Closed loop frequency response is very useful as : a) It approximately predicts the time response of the systems b) Time response are converted into time domain specifications c) After design time domain specification is converted into frequency domain d) All of the mentioned Answer: d Explanation: Closed loop frequency response [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":21726,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_mo_disable_npp":"","footnotes":""},"categories":[44545],"tags":[37782,46667,46666,46665,46686,46687,46669,46664,46688,37834,37765,46671,37958,46685,37906,46645,37845,37830,37921,37913,37915,37914,37912,37922,37888,37895,37892,46657,37886,37897,46684,37880,46682,37950,46683,46658,46646,37838,37839,46674,37840,37841,46675,46677,46676,37835,37780,37767,37771,46680,37774,37794,37916,37943,37928,46659,37954,46679,46681,46638,46641,46632,46634,46636,46648,46637,46652,46655,46635,46656,46660,46661,46662,46631,46628,37930,46629,46649,46650,46627,46651,46625,46624,46633,46626,37939,46630,37955,46643,46642,46644,46639,46640,46654,46647,46653,37842,46673,46663,37843,37781,46668,46670,46672,46678,46689,37831,37832,37833],"class_list":{"0":"post-21246","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-multiple-choice-questions","8":"tag-automatic-control-system-multiple-choice-questions","9":"tag-control-system-engineering-mcq","10":"tag-control-system-engineering-mcq-with-answers","11":"tag-control-system-engineering-mcq-with-answers-pdf","12":"tag-control-system-gate-questions","13":"tag-control-system-gate-questions-pdf","14":"tag-control-system-mcq-indiabix","15":"tag-control-system-mcq-questions-with-answers","16":"tag-control-system-mock-test-for-gate","17":"tag-control-system-multiple-choice-questions","18":"tag-control-system-multiple-choice-questions-pdf","19":"tag-control-system-online-mcq","20":"tag-control-system-questions-for-gate-2014","21":"tag-control-system-questions-for-gate-pdf","22":"tag-control-systems-basics-for-gate","23":"tag-control-systems-engineering-for-gate","24":"tag-control-systems-engineering-mcqs","25":"tag-control-systems-engineering-multiple-choice-questions","26":"tag-control-systems-for-gate","27":"tag-control-systems-for-gate-ece","28":"tag-control-systems-for-gate-eee","29":"tag-control-systems-for-gate-exam","30":"tag-control-systems-for-gate-exam-pdf","31":"tag-control-systems-for-gate-pdf","32":"tag-control-systems-gate-bits-pdf","33":"tag-control-systems-gate-material-free-download","34":"tag-control-systems-gate-online-test","35":"tag-control-systems-gate-practice-questions","36":"tag-control-systems-gate-questions","37":"tag-control-systems-gate-questions-and-answers","38":"tag-control-systems-gate-questions-pdf","39":"tag-control-systems-gate-questions-with-answers","40":"tag-control-systems-gate-questions-with-answers-pdf","41":"tag-control-systems-gate-questions-with-solutions","42":"tag-control-systems-gate-questions-with-solutions-pdf","43":"tag-control-systems-gate-solutions","44":"tag-control-systems-in-gate","45":"tag-control-systems-mcq","46":"tag-control-systems-mcq-pdf","47":"tag-control-systems-mcq-questions","48":"tag-control-systems-mcq-with-answers","49":"tag-control-systems-mcq-with-answers-pdf","50":"tag-control-systems-mcqs","51":"tag-control-systems-mcqs-pdf","52":"tag-control-systems-mcqs-with-answers-pdf","53":"tag-control-systems-mock-test","54":"tag-control-systems-multiple-choice-questions","55":"tag-control-systems-multiple-choice-questions-and-answers","56":"tag-control-systems-multiple-choice-questions-and-answers-pdf","57":"tag-control-systems-multiple-choice-questions-and-answers-preparation-for-competition","58":"tag-control-systems-multiple-choice-questions-with-answers","59":"tag-control-systems-multiple-choice-questions-with-answers-pdf","60":"tag-control-systems-notes-for-gate-ece","61":"tag-control-systems-previous-gate-questions-with-solutions","62":"tag-control-systems-questions-in-gate","63":"tag-control-systems-shortcuts-for-gate","64":"tag-control-systems-topics-for-gate","65":"tag-digital-control-system-mcq-with-answers","66":"tag-distributed-control-system-multiple-choice-questions","67":"tag-electric-gate-control-systems","68":"tag-electronic-gate-control-systems","69":"tag-gate-control-access-systems","70":"tag-gate-control-system-bits","71":"tag-gate-control-system-diagram","72":"tag-gate-control-system-kastam","73":"tag-gate-control-system-notes-for-eee","74":"tag-gate-control-system-of-pain","75":"tag-gate-control-system-pain","76":"tag-gate-control-system-question-bank","77":"tag-gate-control-system-questions-pdf","78":"tag-gate-control-system-theory","79":"tag-gate-control-system-tips","80":"tag-gate-control-system-traduction","81":"tag-gate-control-systems","82":"tag-gate-control-systems-books","83":"tag-gate-control-systems-inc","84":"tag-gate-control-systems-lectures","85":"tag-gate-control-systems-ltd-somerset","86":"tag-gate-control-systems-material","87":"tag-gate-control-systems-notes","88":"tag-gate-control-systems-notes-pdf","89":"tag-gate-control-systems-pdf","90":"tag-gate-control-systems-questions","91":"tag-gate-control-systems-questions-and-answers","92":"tag-gate-control-systems-s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