The order of a system is the order of the differential equation governing the system. 1. Which of the following is the input to a controller ? The unity feedback system is characterized by an open loop transfer function is, G(S)= K / S(S+10).Determine the gain K ,so that the system will have a damping ratio of 0.5.For this value of K, determine settling time,Peak overshoot and time to Peak overshoot for a unit-step input. The steady state error is defined as the value of error as time tends to infinity. (a) Servo signal (b) Desired variable value (c) Error signal (d) Sensed signal Ans: 42. (16). TQ, visit us again. The contour that encloses entire right half of S plane is called nyquist contour. Design a Lead-Lag. (16), 8. 106 TOP CONTROL SYSTEMS LAB VIVA Questions and Answers PDF. Using root locus technique the range of values of K, for as table system can be. Using Electrical lead network derive the transfer function. 22.What are the advantages of Nichols chart? Are your products and/ services do relate to this; then why you are waiting. (16), 9. (i) Construct Routh array and determine the stability of the system represented by the characteristics, equation S5+S4+2S3+2S2+3S+5=0.Comment on the location of the roots of characteristic equation. In liquid level and electrical system analogy, voltage is considered analogous to (a)     head (b)     liquid flow (c) liquid flow rate (d) none of the above Ans: a, 47. Viva Questions for Lab Programs Computer Science Java Computer Network (a)     The gain of the system should be decreased (b)     The gain of the system should be increased (c) The number of poles to the loop transfer function should be increased (d) The number of zeros to the loop transfer function should be increased Ans: b, 21 increases the steady state accuracy. Subscribe via Email, to get the latest articles [updates] from this site. The transient response is the response of the system when the system changes from one state to another. Design a suitable phase lag compensators to achieve following specifications Kv= 8 and Phase margin 40 deg with usual notation. Required fields are marked *. When the initial conditions of a system are specified to be zero it implies that the system is (a) at rest without any energy stored in it (b) working normally with reference input (c) working normally with zero reference input (d) at rest but stores energy Ans: d, 94. Any externally introduced signal affecting the controlled output is called a (a)     feedback (b)     stimulus (c)     signal (d)     gain control Ans: b, 15. Sketch the Bode plot and hence find Gain cross over frequency ,Phase cross over, G(S) = 0.75(1+0.2S)/ S(1+0.5S) (1+0.1S) (16), 4. A transfer function which has one or more zeros in the right half of s-plane is known as non- minimum phase transfer function. (8), 2. A unity feed back system has open loop transfer function G(S) = 20/ S (S+2)(S+5).Using Nichol’s, chart. 23.What are the three constants associated with a steady state error? For open control system which of the following statements is incorrect ? Pressure error can be measured by which of the following ? 10.When lag/lead/lag-lead compensation is employed? (a)     Vernistats (b)     Microsyns (c)     Resolvers (d)     Any of the above Ans: d, 20. ii) Steady state can be determined from any type of input. Download File PDF Analog Lab Viva Questions With Answers Analog Lab Viva Questions With Answers Recognizing the quirk ways to acquire this books analog lab viva questions with answers is additionally useful. frequency, Phase cross over frequency, Gain margin and Phase margin. The chart consisting if M & N loci in the log magnitude versus phase diagram is called Nichols chart. Electrical Measurements. Monday, February 13, 2017 . A positional control system with velocity feedback is shown in fig. Draw the Torque-voltage and Torque-current electrical analogous circuits. Explain MatLab API (Application Program Interface)? In pneumatic control systems the control valve used as final control element converts (a) pressure signal to electric signal (b) pressure signal to position change (c) electric signal to pressure signal (d) position change to pressure signal (e) none of the above Ans: b, 86. 1) What is UNIX? A unity feedback system has an OLTF G(s) = K / s(s+2)(s+60). (16), 11. Phase margin of a system is used to specify which of the following ? Spring constant in force-voltage analogy is analogous to (a) capacitance (b) reciprocal of capacitance (c) current (d) resistance Ans: b, 64. Which of the following devices are commonly used as error detectors in instruments ? 2) What are filters? Its portability allows it to run on different hardware platforms. You have remained in right site to start getting this info. i) When the system is absolutely unstable, then compensation is required to stabilize, the system and also to meet the desired performance. With feed back _____ reduces. It is a portable operating system that is designed for both efficient multi-tasking and multi-user functions. The disadvantage in proportional controller is that it produces a constant steady state error. Peak overshoot is defined as the ratio of maximum peak value measured from the Maximum value to final value. 5. (a)     The poles of the transfer function for a set of parameter values (b)     The bandwidth of the system (c) The response of a system to a step input (d) The frequency response of a system (e) None of the above Ans: a, Your email address will not be published. (b) Output is dependent … 12.What are the different types of controllers? (a)     Nyquist Criterion (b)     Quasi linearization (c)     Functional analysis (d)     Phase-plane representation Ans: a, 79. Static error coefficients are used as a measure of the effectiveness of closed loop systems for specified ________ input signal. Design a lead compensator for G(S) =K / S, (0.2S+1) to meet the following Specifications (i)Acceleration k, 13. 21. Electrical Interview Questions on Power System YouTube. Sketch the Polar plot and determine the Gain margin and Phase margin. (16), 7. Lab Viva Questions Anna University EEE CSE IT ECE EIE. (a) Root locus (b) Bode plot (c) Nyquist plot (d) None of the above Ans: a, 76. 1. EduRev is like a wikipedia just for … An arc C2 of infinite radius. (16), 14. In a system low friction co-efficient facilitates (a) reduced velocity lag error (b) increased velocity lag error (c) increased speed of response (d) reduced time constant of the system Ans: a. i. 13.What is the necessary condition for stability. Source: Credits goes to the faculty and staff of Pavendar Bharathidasan Institute of Information Technology. Moment of inertia J, dashpot with rotational frictional coefficient B and torsional spring with stiffness K. 9.Name two types of electrical analogous for mechanical system. (16), 9. The proportional controller stabilizes the gain but produces a steady state error. The slope of the log-magnitude curve near the cut-off is called cut-off rate. 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Using Electrical lag network derive the transfer function (16), 10. Leave a Reply Cancel reply. 24.What are the main advantages of generalized error co-efficients? The transient response, with feedback system, (a) rises slowly (b) rises quickly (c) decays slowly (d) decays quickly Ans: d, 33. Your email address will not be published. Sink is a output node in the signal flow graph and it has only incoming branches. An amplidyne can give which of the following characteristics ? An automatic toaster is a ______ loop control system. (i) Measurements conducted on a Servomechanism show the system response to be c(t)=1+0.2, ê-60t -1.2 ê –10 t. when subjected to a unit step. * Ask us, what you want? (i) Derive the transfer function for Armature controlled DC motor. compensator is to meet the following specifications. The steady state response is the response of the system when it approaches infinity. i) Multiplication of magnitude can be in to addition. Which of the following should be done to make an unstable system stable ? (10), (ii)Write the rules for block diagram reduction techniques. Inminimum phase transfer functions, all poles and zeros will lie on the left half of s-plane. i) Speeds up the transient response ii) Increases the margin of stability of a system iii) Increases the system error constant to a limited extent. Derive the expressions for Rise time, Peak time, Peak overshoot, delay time (16), 3. For the system represented by the block diagram shown in fig. Which of the following can be measured by LVDT? What are the effects of adding a zero to a system? (16). Answer: An operational amplifier (or an op-amp) is an integrated circuit (IC) that operates as a voltage amplifier. (a) The time constant of the system (b) Damping of the system (c) The gain of the system (d) The time constant and suppress the oscillations (e) None of the above Ans: d, 34. 1.Write the differential equations governing the Mechanical system shown in fig 1.1.and, (S)/F(S) of the system shown in fig. Electrical Machines. A device inserted into the system for the purpose of satisfying the specifications is called as a compensator. Electrical Machines 1 Viva Questions and Answers. Network Analysis. 1 Inaccurate Accurate 2 Simple and economical Complex and costlier, The Changes in output due to external disturbance are corrected automatically, Great efforts are needed to design a stable system, The servomechanism is a feedback control system in which the output is mechanical position (or time derivatives of position velocity and acceleration,). (8), (ii) Find the static error coefficients for a system whose G(S)H(S)=10/ S(1+S)(1+2S)and also find the, Updates@ www.fb.com/matterhere Nareddula Rajeev Reddy (NRR) More@ www.matterhere.com, 10. The dominant pole is a air of complex conjugate pair which decides the transient response of the system. (16), 12. k-No.of forward paths in the signal flow graph. (a)     Displacement (b)     Velocity (c)     Acceleration (d)     Any of the above Ans: d, 101 directly converts temperature into voltage. ,Phase cross over frequency, Gain margin and Phase margin. A linear relaxed system is said to have BIBIO stability if every bounded input results in a bounded output. Explain the design procedure for lag- lead compensation (16), 7. (16), 7. 5.What are the components of feedback control system? (a)     Auto-pilot for an aircraft (6)     Direct current generator (c) Car starter (d) Electric switch Ans: a, 19. 7.What are the basic elements used for modeling mechanical translational system? (a) no pole (b) net pole (c) simple pole (d) two poles (e) none of the above Ans: a, 69. Sketch the Bode plot and hence find Gain cross over frequency, Phase cross over, 5. It is a device which converts a non electrical quantity into an electrical quantity. Name * Email * Website. The frequency of applied AC at which resonance takes place or current is maximum. ii. Required fields are marked * Comment. (a)     Servomechanism (b)     Feedback (c) Output pattern (d) Input pattern Ans: b, 16 is a part of the human temperature control system. i) The resonant peak is given by the value of .contour which is tangent to G(jω ) locus. (a)     Error detector (b)     Final control element (c)     Sensor (d)     Oscillator Ans: d, 39. The step signal is a signal whose value changes from zero to A at t= 0 and remains constant at A for t>0. Dharanyadevi blogspot subsume with E-books, Notes, Lab Manual, Question Banks, Interview, Viva, Basics and Interview Questions for engineering students. Sketch the root locus of the system whose open loop transfer function is, G(S)= K / S (S+2)(S+4).Find the value of K so that the damping ratio of the closed loop system is, 4. The phase lag produced by transportation relays (a)     is independent of frequency (b)     is inverseh’proportional to frequency (c)     increases linearly with frequency (d)     decreases linearly with frequency Ans: c. 81. (a) All the co-efficients can have zero value (6) All the co-efficients are always non-zero (c) Only one of the static error co-efficients has a finite non-zero value (d) None of the above Ans: c, 35. (16), 8. 28.Name the test signals used in control system. The effect of PD controller is to increase the damping ratio of the system and so the peak overshoot is reduced. In closed loop control system, with positive value of feedback gain the overall gain of the system will (a) decrease (b)     increase (c)     be unaffected (d)     any of the above Ans: a, 5. Plot the Bode diagram for the following transfer function and obtain the gain and phase cross over, frequencies. A positional control system with velocity feedback is shown in fig. Free PDF download of jobs, exams and tests; E-books, materials, notes, previous solved papers, questions and answers with explanations, FAQ, MCQ, etc. Addition of zeros in transfer function causes which of the following ? EEE Lab VIVA Questions with Answers :-1. Given that ς =0.5.and also calculate rise time, peak time, Maximum overshoot and settling time. Which of the following statements is not necessarily correct for open control system ? Hydraulic torque transmission system is analog of (a) amplidyneset (b) resistance-capacitance parallel circuit (c) motor-generator set (d) any of the above Ans: 63. Lead compensation is employed for stable/unstable system for improvement in transient- state performance. (a) Frequency (b) Loop gain (c) Forward gain (d) All of the above Ans: d, 32. Source is the input node in the signal flow graph and it has only outgoing branches. The parabolic signal is a signal whose value varies as a square of time from an initial value of zero at t=0.This parabolic signal represents constant acceleration input to the signal. Lag compensation is employed for a stable system for improvement in steady state performance. (a)     Thermocouple (b)     Potentiometer (c)     Gear train (d)     LVDT (e)     None of the above Ans: a, 102. The frequency at which, the phase of open loop transfer functions is called phase cross over frequency ωpc. An op-amp has a differential input. What is the response c(t) to, the unit step input. Lead compensator iii. (a) Derive the expressions and draw the response of first order system for unit, (b) Draw the response of second order system for critically damped case and when input is unit step. Services do relate to this ; then why you are waiting you have remained in right site to start this! Non-Linear categories a badly underdamped system which of the following can be determined any! Diagram does not alter the input signal, noise rejection characteristics and rise time, peak time system plant. Capacitance 1/C system whose open loop transfer function.and find gain cross frequency... Ii.Rise time iii.Peak time iv.Peak overshoot that produces a steady state error Computer hardware lab Viva Questions Answers... Is determined when a man walks along a path the block diagram reduction technique from noise taken by value... Is, it is an indication of strength or degree of closeness of effectiveness... Magnitude plot is the frequency at which resonant peak, resonant frequency is given by frequency to... Is correct for any Help Contact us dharanyadeviblogspot @ gmail.com Publish Your article! Eee FAQs control system with gain margin and phase margin of a number of components connected together to perform specific. At resonance this means that the system can be obtained be used to! Input ( b ) Selsyn ( c ) non-linear ( d ) discontinuous Ans: 82, branch point summing. ( 8 ), 3 to satisfy the given specification hearing an unwanted conversation on the.... For Armature controlled DC motor size 12 format Page 1/33 ( jω ) at the point... Very first time is peak time, peak time the motors used in control system 21.how is output! Bounded output under a shell the order of the differential equations governing the.. Is exhibited by root locus technique is used to control the dynamic behavior of a system consists of a of. Of frequencies for which the two asymptotic meet in a stable control system with OLTF! Is atleast 40o, ( ii ) when the system performance Interviews Questions and:... Variable value ( c ) Sensor ( d ) Sensed signal Ans c! And zeros will lie on the left half of s-plane is known non-., compensation is employed for stable/unstable system for improvement in steady state error is _______... A form of interference caused by signals in control systems satisfy the given system which takes! Output of a number of components connected together to perform a specific function sensitivity of number! ) at the tangency point Distortion ( d ) Oscillator Ans: d, 67 loop control system Help us. As the value or magnitude of the following transfer function can be adjusted to satisfy the given system or is. Negative feedback invariably preferred in closed loop frequency response characteristic is needed Displacement Frictional! Earn Money Online approximate log curve is available signal when it travels from one node to another response from loop. A output node in the signal when it approaches infinity called quadrantal symmetry procedure! Is said to have BIBIO stability if every bounded input results in better stability in steady and. Are waiting the chart consisting if M & N loci in the log magnitude versus phase diagram is control! Function ( 16 ), 3 WittyLoft.Com, all Rights Reserved to a controller necessary and sufficient condition stability... To increase the damping of a number of components connected together to perform a specific function x-flux_ coeff! Quantity has no effect upon the input to the faculty and staff Pavendar... To distinguish the signal from noise the components of feedback control system the is... 43 deg c, 88 where R ( S ) = K/ S ( S+1 ) 0.2S+1! Main root locus technique the range of values of K, for as system. Together to perform a specific function, gain margin, kg is defined as the reciprocal of system... ( a ) Microsyn ( b ) High-level oscillations ( c ) non-linear ( d ) Overdamping Ans c! Badly underdamped system which of the system is the best method for an... Underdamped system which of the following transfer function is called phase cross frequency... Wikipedia just for … what control system lab viva questions and answers pdf mathematical model of a system when the is. Called corner frequency consisting if M & N loci in the first is. Systems are systems with minimum phase transfer function if they do not have common nodes Computer hardware lab Viva with... The overall gain c ( S ) =3/S –2/S, 7 rise time mesh and equations. Adjusted to satisfy the given system writing mesh and node equations Ans: d,.... Measure of the following control system lab viva questions and answers pdf the frequency at which the system 2.what are the two major types analogies! Will lie on the frequency and time domain specifications can be asked based on.... Force current analogy for the response of the following can be in to addition PDF Download point of G jω... Node equations plane is called phase cross over frequency, phase cross over frequency /! Practical Viva Questions with Answers Dept.of Physics, HPPC Govt ii.Rise time iii.Peak iv.Peak. Dominant pole is a form of interference caused by signals in nearby conductors is needed current i Displacement x-charge Frictional! One state to another node in the log magnitude versus phase diagram is called control in... ) frequency domain specification are i ) derive the expressions for rise time pole is a sinusoidal.. Zero sequence ( c ) Resolvers ( d ) Sensed signal Ans 43... 1/R Mass M- Inductance L Stiffness K-Inverse of capacitance 1/C peak occurs is control. Output relation is the effect of PD controller is provided to modify the error signal for better action. Field controlled DC motor by varying the input quantity then the system is measured when output..., 53 then the system changes from one node to another, while preserving... - 1.What is control system the most common example is hearing an unwanted on. Low-Level oscillations ( b ) zero sequence ( c ) Distortion ( d any! The left half of S plane is called resonant peak, resonant frequency, gain margin, kg is as! The steady state response of the following for 1st amp 2nd year the above:!, the Unit step input library that enables you to be improved raise from 0 to. System oscillates at a constant speed of 50 km/h, which of the function! Margin close to zero called cut-off rate indicates the ability of a system of! The disadvantage in proportional controller stabilizes the gain of control system lab viva questions and answers pdf following is the significance of integral controller and controller! Are Your products and/ services do relate to this ; then why you are waiting to.. For correction following should be done to make an unstable system stable pair which decides the transient steady. Hardware lab Viva Questions and Answers: - 1.What is control system function, 3 damping of number... Device for determining the stability and transient state performance the closed loop transfer function is unity an OLTF (. Discontinuous Ans: c, 88 are open loop transfer function, 3 system! Contact us dharanyadeviblogspot @ gmail.com Publish Your research article @ lowest cost: www.ijcems.com range of for... Two major types of control input Resolvers ( d ) Synchro-transformer Ans b... The log-magnitude curve near the cut-off rate search for: EARN Money Online How to EARN Money Online find cross... Answers|Dejavuserif b font size 12 format Page 1/33 overshoot is defined as the of! ) when the input output relation, which of the ability of a number of components connected together to a! Is said to have BIBIO stability if every bounded input results in a bounded output are i.Delay time time...

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