Bode plot Definition and 73 Threads

Hi all, on a current homework I have been given a transfer function and asked to draw the straight-line (asymptotic) magnitude (dB) and phase (degrees) Bode plot. I first learned Bode plots roughly a year ago, and while being on spring break and my notebook from last year is at school, I'm...

Homework Statement I have a bode plot with a positive phase. Homework Equations this is a MATLAB code for the thing % bode phase plot w = logspace(1, 4, 100); G = 100*(1+0.017i*w)./(1i.*w.*(1+0.05i.*w).*(1+0.0025i.*w).*(1+0.001i.*w)); fi = atand(imag(G)./real(G)); semilogx(w, fi); % x-axis...

I am learning to draw Bode Plots. I am able to figure out ωgc, ωpc, Phase Margin & Gain Margin graphically from the Bode Plot. But I was wondering if there is a way to calculate ωgc and ωpc mathematically with some formulas - how do I do this?

Since the deci in decibels means 10, why is decibels of Magnitude in the Bode plot calculated as 20log instead of 10log?

Hi, I have a 8th order s-domain transfer function that i would like to normalize for plotting a bode plot. The transfer function is in expanded form i.e. s^8 +s^7+s^6 etc. i want to normalise the frequency f by frequency f0 such that s = j(f/f0) instead of just s = j2πf. the reason i...

Homework Statement I am constructing a Bode plot from a given transfer function. I having trouble because I am unsure how to rewrite the transfer function in the proper form. What makes this transfer function particularly tricky for me, is that there is no "jω" in the numerator, just ω^2...

How would you plot the magnitude and phase Bode plots for the system transfer function of (4s^3+40s^2)/(4s^4+405s^3+504s^2+400s) I plugged it into MATLAB and got a result but my professor wants hand calculations. Thanks

I have been drawing a few bode diagram by hand and i am ask to find the phase and gain margin of the plot. Can someone please explain what are phase and gain margin, including how to determine it from the bode plot?

I am trying to manually make a bode plot for the transfer function: G(jw)= 5/[jw(1+jw0.6)(1+jw0.1)] I know how to plot it but I am having a problem determining all the break off frequencies. In particular for the term pole at (1+jw0.6). Could someone give...

Homework Statement What are the effects of poles and zeros of a transfer function on its magnitude graph. Note: The Transfer function is discrete. Homework Equations zeros= roots of numerator poles=roots of denominator The Attempt at a Solution I really don't have any idea. I...

Dear all, Can anyone describe as to how we can plot frequency response in SIMULINK-MATLAB. One way is to use spectrum analyzer but it does not give accurate results for continuous time systems...another way could off course be to use commands but I need something which can compute bode plots...

1. For the control system described by the transfer function H(s)=Y(s)/U(s)=10/(s^2+11s+10) Sketch the bode plot: amplitude and phase diagram. What is the bandwidth of the system? 2. General form of a second order system H(s)=wn^2/(s^2+2*zeta*wn*s+wn^2) Magnitude characteristic in...

Homework Statement I'm doing a question that requires a Bode plot (magnitude and phase). The Attempt at a Solution I got a transfer function of H(\omega)=\frac{1+\frac{j*\omega}{3}}{1-0.1667(\omega)^{2}+0.4167j*\omega} So there is a simple zero at 3 rad/s; complex pole at 2.45 rad/s...

Homework Statement Transfer function: G(s) =\frac{k}{s^{2}+2\varsigma\omega_{n}s+\omega_{n}^{2}} a) if u(t) = cos(2t), find the steady state response b) determine the values for k, damping ratio (\varsigma), and the natural frequency. Homework Equations The Attempt at a Solution...

Hi everybody, I did a few measurements at a printer. I have a signal that i put in the printer that gives the printerhead a speed. I have put a sinus on the printerhead, and did this at different frequencies with the same signal strength (20 to 500 Hz, with steps of 15 Hz). I want to...

Homework Statement How do you draw a bode plot? I have a simple equation: H(S)=s+10 but no school book. Can you help me understand?

Homework Statement How do you draw a bode plot? I have a simple equation: H(S)=s+10 but no school book. Can you teach me?

Homework Statement Sketch the Bode Plot for the following Transfer Function: G(s)=10/s(1+ts) where t=0.1sec The Attempt at a Solution G(jw)=10/jw(1+tjw) - frequency response... Gain = 20log(10) - 20log(tw^2+w) Does this mean that the Gain apporaches infinity as w approaches...

Homework Statement I have to plot some data for a lab writeup. It's based on the frequency response of fluid catheter-transducer systems. Part of this writeup includes making Bode plots for the gain and phase shift. I know how to plot my data; the problem that I am having is that I want to try...

Homework Statement sketch a bode plot of frequency versus voltage gain (in decibels) for the following circuit: Homework Equations Voltage divider: V_X = V_S \frac{Z_X}{Z_T} Voltage gain: A_V = \frac{V_O}{V_I} log(A)+log(B) = log(A*B) The Attempt at a Solution This is the most...

Hi, I try to visualize a sine wave, z-transformed in a Bode plot. The frequency shows up correctly, but the amplitude is way off - why? Thanks for your comments. Bmalp function zdemo format compact syms w Ts n z phi t Ts = 1 w = 0.1 phi = 0 vz =...

Is the x-axis of a Bode plot supposed to be angular frequency omega or just the frequency f? The y-axis is in dB. Thanks!

Hi, I have got difficulties with the following:a simple RC circuit (scheme of the circuit and measurements attached). I measured out the bode plot and now I have to find the values of R and C ,but I don't know how. Can someone help me please.