the main objective of drawing root locus plot is

b) -3,0 All Rights Reserved. a root locus plot shows all possible closed-loop pole locations as a parameter (usually a proportional gain K) is varied from 0 to infinity.We will employ the root locus to design our controller to place our system's closed-loop poles in locations that will result in behavior that satisfies our given requirements. On the real axis, a segment to the left of an odd number of real poles and zeros of are on the root locus for , as any on the segment satisfies the angle criterion for . a) Branches c) -4,0 For the system above the characteristic equation of the root locus due to variations in Kcan be written directly from Eq. Root locus of s(s+2)+K(s+4) =0 is a circle. (We assume that the value of gain K is nonnegative.) In theory, the root locus plot exists for K up to infinity, but we are most often only interested in what happens for reasonably low K -values. Basics of Root Locus. Rule 7 If there are two or more excess poles than zeros ( ), then for any gain K, the sum of the real parts of the closed-loop poles (or the average distance from the -axis) is constant 3. b) Imaginary axis and system becomes marginally stable a) -2,0 b) Complementary root locus is for the positive feedback systems In control theory and stability theory, root locus analysis is a graphical method for examining how the roots of a system change with variation of a certain system parameter, commonly a gain within a feedback system. By continuing, I agree that I am at least 13 years old and have read and View Answer, 7. a) To obtain a clear picture about the open loop poles and zeroes of the system is done on EduRev Study Group by Electrical Engineering (EE) Students. over here on EduRev! are solved by group of students and teacher of Electrical Engineering (EE), which is also the largest student Section 6–2 / Root-Locus Plots 273 R(s) K C(s) s(s + 1) (s + 2)Figure 6–3 Control system. Plot For The Root Locus: rlocus(P)%root locus plot. The result will be a set of curves, each beginning at an open loop pole. – By using this method, the designer can predict This method is very powerful graphical technique for investigating the effects of the variation of a system parameter on the locations of the closed loop poles. View Answer, 8. The Questions and (Because they appear in complex pairs). c) Conditional stability Explanation: The main objective of drawing root locus plot is to obtain a clear picture about the transient response of feedback system for various values of open loop gain K and to determine sufficient condition for the value of ‘K’ that will make the feedback system unstable. d) The right and system becomes unstable Answers of The main objective of drawing root locus plot is :a)To obtain a clear picture about the open loop poles and zeroes of the systemb)To obtain a clear picture about the transient response of feedback system for various values of open loop gain Kc)To determine sufficient condition for the value of ‘K’ that will make the feedback system unstabled)Both b and cCorrect answer is option 'D'. Each branch begins at an open loop pole (the "X"s). Can you explain this answer? This tech- View Answer, 4. With the advent of the personal computer and the avail-ability of faster processors, a suitable technique to be used in a personal computer is the root-locus-plotting. The vector lengths from to the poles are marked on the diagram Which one of the following statements is not correct? The calling format is . Learn the first and the simplest rule for drawing the Root Locus. Participate in the Sanfoundry Certification contest to get free Certificate of Merit. Explanation: The main objective of drawing root locus plot is to obtain a clear picture about the transient response of feedback system for various values of open loop gain K and to determine sufficient condition for the value of ‘K’ that will make the feedback system unstable. Sketch the root locus diagram for the parameter K for the closed loop system shown in the diagram. Look at the plot that results from the example. b) False d) Relative stability Can you explain this answer? RootLocusPlot[tfunc, , , ] Let denote a rational transfer function whose coefficients depend on the real parameter . The main objective of drawing root locus plot is :a)To obtain a clear picture about the open loop poles and zeroes of the systemb)To obtain a clear picture about the transient response of feedback system for various values of open loop gain Kc)To determine sufficient condition for the value of ‘K’ that will make the feedback system unstabled)Both b and cCorrect answer is option 'D'. c) The left and system becomes unstable The root locus plot travels from the "peaks" to the "valleys" along the lines of steepest descent: The Bode magnitude plot is the intersection of the surface and the - plane: Possible Issues (1) d) Both b and c The root locus starts (begins) at open-loop poles and ends at open-loop zeroes. of the branches go to the finite zeros of . closed-loop poles will be equal 0.6. Correct answer is option 'D'. Motor Control System has two poles one at s = 0 and the other at s = – 1. community of Electrical Engineering (EE). Vast literature on these subjects can be found, for example in Refs. You can study other questions, MCQs, videos and tests for Electrical Engineering (EE) on EduRev and even discuss your questions like This discussion on The main objective of drawing root locus plot is :a)To obtain a clear picture about the open loop poles and zeroes of the systemb)To obtain a clear picture about the transient response of feedback system for various values of open loop gain Kc)To determine sufficient condition for the value of ‘K’ that will make the feedback system unstabled)Both b and cCorrect answer is option 'D'. Is complete set of curves, each beginning at an open loop pole the. Diagram, along with the portion of the characteristic equation of the poles and zeros exist in s-domain... At this angle intersects the root-locus at approximately, because the open loop (! 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