Bode plot, gain margin and phase margin plus diagram. Bode plot nyquist plot logmagnitude versus phase plot 2 bode plot bode plot is a semilog diagram consists of two plot the transfer function magnitude vs. However, we have not obtained a direct plot of magnitude y. Several examples of the construction of bode plots are included in this file. Click on the transfer function in the table below to jump to that example. The q factor affects the sharpness of peaks and dropoffs in the system. It gave us if we start with an open loop system which is unstable can. Many common system behaviors produce simple shapes e. Nptel provides elearning through online web and video courses various streams. Through this initiative, online courses and certification in various topics. Case study on new initiatives taken on caisson foundations and cutting edge construction at bogibeel bridge. Ramkrishna pasumarthy, department of electrical engineering, iit madras. Bode plots are a simpler method of graphing the frequency response, using the poles and zeros of the system to construct asymptotes for each segment on a loglog plot. A bode plot is a standard format for plotting frequency response of lti systems.
Becoming familiar with this format is useful because. Bode plot is a semilog diagram consists of two plot the transfer function magnitude vs. Dear student, nptel national programme on technology enhanced learning is a joint initiative of the iits and iisc. Examples click on transfer function 1 a real pole 2 real poles and zeros 3 pole at origin 4 repeated real poles, negative constant 5 complex conj. Lecture series on networks,signals and systems by prof. So, last time we plotted nyquist and that gave us lot of information. From the last lecture we have noted how we can use the bodeplot for obtaining the frequency response of a system. Case study on new initiatives taken on caisson foundations. Introduction to bode plot 2 plots both have logarithm of frequency on xaxis o yaxis magnitude of transfer function, hs, in db o yaxis phase angle the plot can be used to interpret how the input affects the output in both magnitude and phase over frequency. Agashe, department of electrical engineering,iit bombay. Bridging the mighty and ferocious river brahmaputra is a great challenge in itself. A bode plot maps the frequency response of the system through two graphs the bode magnitude plot expressing the magnitude in decibels and the bode phase plot expressing the phase shift in degrees. Through this initiative, online courses and certification in various topics are offered. Bode plots page 1 bode plots a bode plot is a standard format for plotting frequency response of lti systems.
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