The integral control reduces or eliminates the steady state error. ii)Resonant frequency. 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. The time taken for the response to reach the peak value for the first time is peak time. (i) P.M is atleast 40o , (ii) Steady state error for ramp input ≤ 0.04 rad. Design a lead compensator for G(S) =K / S, (0.2S+1) to meet the following Specifications (i)Acceleration k, 13. Tags. 1. By which of the following the control action is determined when a man walks along a path ? (a) digital (b) linear (c) non-linear (d) discontinuous Ans: 43. 9. Lead compensation is employed for stable/unstable system for improvement in transient- state performance. Draw a signal flow graph and evaluate the closed loop transfer function of a system whose block is, 10. PD controller is a proportional plus derivative controller which produces an output signal consisting of two time -one proportional to error signal and other proportional to the derivative of the signal. (16), 10. (a) Systems having complexities and non-linearities (b) Systems having stability problems (c) Systems having multiple input disturbances (d) All of the above Ans: d, 103. If the phase of closed loop transfer function with unity feedback is α, then tan α will be in the form of circles for every value of α. ii) A simple method for sketching an approximate log curve is available. 21. Sketch the Nyquist Plot for a system with the open loop transfer function, G(S) H(S)= K (1+0.5S)(1+S) / (1+10S)(S-1). Determine the closed loop frequency response and estimate all the frequency domain specifications. Subscribe via Email, to get the latest articles [updates] from this site. Control System Unit wise Viva Short Questions and Answers PDF Rajeev Reddy Nareddula. A closed loop system is distinguished from open loop system by which of the following ? (16), 8.Find the overall gain of the system whose signal flow graph is shown in fig. Download PDF. 8.What are the basic elements used for modeling mechanical rotational system? Required fields are marked * Comment. Construct the polar plot for the function GH(S) =2(S+1)/ S, . The system is to be compensated to meet the following specifications Kv > 5sec and PM > 43 deg. As a result of introduction of negative feedback which of the following will not decrease ? (i) Obtain the response of unity feedback system whose open loop transfer function is, G(S) = 4 / S (S+5) and When the input is unit step. (a) The range of air output as measured variable varies from maximum to minimum (b) The range of measured variables from set value (c) The range of measured variables through which the air output changes from maximum to minimum (d) Any of the above (e) None of the above Ans: c, 85. (16), 14. 7.What are the main significances of root locus? Friday, July 13, 2012 (SS) System Software Viva Question and Answers VIVA VOCE QUESTIONS WITH ANSWERS … A device inserted into the system for the purpose of satisfying the specifications is called as a compensator. An finite line segment C1 along the imaginary axis. In order to increase the damping of a badly underdamped system which of following compensators may be used ? (a) Output is independent of control input. The frequency at which resonant peak occurs is called resonant frequency. (a) Band width (b) Overall gain (c) Distortion (d) Instability Ans: a, 24. What is an object? (a) Underdamping (b) Overdamping (c) Poor stability at reduced values of open loop gain (d) Low-level oscillations Ans: d, 38. Tag: control systems lab viva questions and answers pdf Top 100 Control Systems Objective Questions & Answers S Bharadwaj Reddy February 10, 2017 September 7, 2020 (a) remains unaffected (b) decreases by the same amount as the gain increase (c) increases by the sane saaaajajt as the gain decrease (d) decreases by the same amount as the gain decrease Ans: c, 31. If the Nyquist plot of the open loop transfer function G(s) corresponding to the nyquist control in the S-plane encircles the critical point –1+j0 in the counter clockwise direction as many times as the number of right half S-plane poles of G(s),the closed loop system is stable. Z =R 4. 2. Which of the following is the input to a controller ? Masons Gain formula states that the overall gain of the system is. In an open loop control system (a) Output is independent of control input (b) Output is dependent on control input (c) Only system parameters have effect on the control output (d) None of the above Ans: a. Lag-Lead compensator. 23.What are the three constants associated with a steady state error? 106 TOP CONTROL SYSTEMS LAB VIVA Questions and Answers PDF. This webpage contains short answer type questions of Computer Graphics. (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. The measurement system consists of a transducing element which converts the quantity to be measured in an analogous form. For Any Help Contact us dharanyadeviblogspot@gmail.com Publish Your research article @lowest cost: www.ijcems.com. (a) Error detector (b) Final control element (c) Sensor (d) Oscillator Ans: d, 39. The controller is provided to modify the error signal for better control action. An op-amp has a single output and a very high gain, which means that … In an open loop control system (a) Output is independent of control input (b) Output is dependent on control input (c) Only system parameters have effect on the control output (d) None of the above Ans: a, 2. 19.Write the force balance equation of M ideal mass element. Peak overshoot is defined as the ratio of maximum peak value measured from the Maximum value to final value. Sketch the polar plot for the following transfer function .and find Gain cross over frequency. Q7. Damping ratio is defined as the ratio of actual damping to critical damping. Zero initial condition for a system means (a) input reference signal is zero (b) zero stored energy (c) ne initial movement of moving parts (d) system is at rest and no energy is stored in any of its components Ans: d, 29. (a) no pole (b) net pole (c) simple pole (d) two poles (e) none of the above Ans: a, 69. (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. An amplidyne can give which of the following characteristics ? The contour that encloses entire right half of S plane is called nyquist contour. Which of the following can be measured by the use of a tachogenerator ? The two types of analogies for the mechanical system are Force voltage and force current analogy. With feed back _____ reduces. Linear Control System Lab Viva Questions And Answers >>>CLICK HERE<<< Model Viva Questions for “Name of the Lab: Television Engg.Lab Title of the Practical 1: Familiarization with consumer and technician control sync pulses and the voltage that develops across output of horizontal deflection system. 17.Write the analogous electrical elements in force voltage analogy for the elements of mechanical translational system. It is a portable operating system that is designed for both efficient multi-tasking and mult-user functions. The order of a system is the order of the differential equation governing the system. The capacitance, in force-current analogy, is analogous to (a) momentum (b) velocity (c) displacement (d) mass Ans: d, 44. Consider a type 1 unity feed back system with an OLTF G(S) =K/S (S+1) (S+4). The ramp signal is a signal whose value increases linearly with time from an initial value of zero at t=0.the ramp signal resembles a constant velocity. Addition of zeros in transfer function causes which of the following ? Which of the following should be done to make an unstable system stable ? A negative phase angle is called phase lag. 19.What is the drawback of static coefficients? These circles are called N circles. The basic elements of block diagram are block, branch point and summing point. The term backlash is associated with (a) servomotors (b) induction relays (c) gear trains (d) any of the above Ans: 58. Velocity error constant of a system is measured when the input to the system is unit _______ function. Which of the following statements is correct for any closed loop system ? Electrical Machines 1 Viva Questions and Answers. Write the force balance equation of ideal spring element. 1) What is UNIX? A linear relaxed system is said to have BIBIO stability if every bounded input results in a bounded output. Obtain the closed loop transfer function C(S)/R(S) of the system whose block diagram is shown in, 6 . 20. find Gain cross over frequency ,Phase cross over frequency, Gain margin and Phase margin. 62. Vtu Control Systems Lab Viva Questions and Answers pdf, 106 TOP CONTROL SYSTEMS LAB VIVA Questions and Answers PDF, 400 SUBJECT WISE ECE LAB VIVA Questions and Answers pdf 2020, VTU Electrical And Electronics Engineering 6th Sem CBCS, Video Lectures for Microcontroller and Embedded Systems, Control System Unit wise Viva Short A frequency responses the steady state response of a system when the input to the system is a sinusoidal signal. It is a portable operating system that is designed for both efficient multi-tasking and multi-user functions. Using Electrical lag-lead network derive the transfer function (16), 11. Structures Lab Viva Questions And Answers Data Structures Lab Viva Questions And Answers|dejavuserif b font size 12 format Page 1/33. 25.What is the disadvantage in proportional controller? 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. EDC. 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. A unity feedback control system has an open loop transfer function, 3. (16), 4. Sketch the polar plot for the following transfer function .and find Gain cross over. Lag compensation is employed for a stable system for improvement in steady state performance. the commonly used test input signals in control system are impulse step ramp acceleration and sinusoidal signals.
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