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Paul


Last seen: Today Actif depuis 2011

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A répondu
modred() Scaled Output
Hi Sam, I can't explain why TMW chose to change the behavior of modred. Having said that, I have some observations about your ...

environ 2 heures il y a | 0

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How to get 2% and 5% settling time from simulink?
Hi Daniel, I'm interpreting your question to mean that you have a Simulink model of the system and in Simulink you stimulate th...

environ 15 heures il y a | 0

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Zero-order hold practical differentiator offsets magnitude
Hi Greg, I don't know if this will be the complete explanation your looking for, but here goes .... Define the continuous-time...

4 jours il y a | 0

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Symbolic integration has 3 solutions based on integration variable range, how to extract one of these?
syms U_0 r Radius mom_2 = int((U_0*(1-r/Radius)^(1/7))^2*2*sym(pi)*r,r,0,Radius) One approach that just extracts the case you ...

5 jours il y a | 2

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How to set the sample time of a discrete transfer function block to 0.005? Please tell
Hi ISHITA, TMW recommends leaving the sample time of that block as inherited. Instead, control the sample time of the signal th...

6 jours il y a | 0

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Discrete-time Simulink not matching Matlab Connect()
Hi John, Check this comment for an example that shows the same open loop system obtained from the combination of connect and ge...

7 jours il y a | 0

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Do source blocks in Simulink have an implicit unit step function built into them?
For the top path: Y(s) = s/(s+1)*X(s) = 1/(s+1) * (s*X(s)) The differentation rule for the one-sided Laplace transform is: L(...

7 jours il y a | 1

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Find the 3D components-based row of an array that most closely matchs a given vector
I think the specific solution would depend on the figure of merit for defining "closeness" of two vectors. For example, if the ...

8 jours il y a | 0

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Why are subsystems highlighted in different color after simulation
Hi Neelabh, It looks like it might be due to Sample Time Colors. Go to Debug -> Information Overlays and see if the Sample Time...

9 jours il y a | 0

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Execute Matlab function in Simulink
You are correct. In Matlab, the code looks like this (actually making the call to moving_average2) t = 0:0.1:10; u = sin(t); ...

10 jours il y a | 0

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why am i getting the error "Incorrect number or types of inputs or outputs for function step."
Hi Salim Your code runs fine here. What version of Matlab are you using? I just changed the code to make separate plots intead...

10 jours il y a | 0

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ifft convert frequency domain to time domain
Hi Angie, The input to ifft should cover all frequencies from 0 to Fs - df, where df is the frequency step. In this case, max(f...

10 jours il y a | 1

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How to automatically reinitialize the model workspace when Run Simulink model
Hi Steven, Model workspaces can be manipulated programatically In your workflow, create a model workspace object and use reloa...

12 jours il y a | 0

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Symbolic expressions with pi are displaying as decimals
Hi Nathaniel. Option 1: Always use sym(pi); in symbolic expressions. For example 5.13445677*sym(pi) If you use the numeric ...

13 jours il y a | 1

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Why does augw(P, W1, W2, W3) give a much lower order generalized plant when compared to the by hand construction?
Hi Vinh, The 'by-hand' construction is nearly certainly not what augw actually does. You can look at the augw code; maybe it wi...

15 jours il y a | 1

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How to use freqz to plot the frequency response from neg frequency to pos frequency
Use the third argument to freqz to specify the desired frequency points: f_sampling = 40e3; % sampling frquency f_pass = 10e3;...

16 jours il y a | 0

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Need help substituting vector variables into symbolic expression
syms x y Option 1. Use a symbolic function z(x,y) = x + y z([1 2],[100 200]) Option 2. Symbolic expression, subs with a cell...

19 jours il y a | 0

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Discrete Derivative block (Simulink) behaves differently than expected
Hi John, How did you get the yellow colors on the rate transition blocks on the signals coming out of those? If you turned on ...

20 jours il y a | 0

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Matlab is not giving the correct z transform of - (n*a^n)*u[- n - 1];
In addition to what @VBBV said about a typo in the defintion of y[n], there are two other fundamental problem that needs to be a...

23 jours il y a | 1

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Fourier transform of derivative expression with respect to time
Hi Erikan, I'm not clear what you're asking about how j*w should be calculated. It's just part of the expression. If you're as...

24 jours il y a | 0

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What's the difference between two command?
That's the old, obsolete form of nyquist() that was used for state space models before the Control System Toolbox introduced lti...

27 jours il y a | 2

Question


What is the Distinction Between Answers and Discussions?
I just now discovered Discussions. Can anyone provide insight into the intended difference between Discussions and Answers and ...

27 jours il y a | 3 réponses | 2

3

réponses

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Given an LTI system with corresponding transfer matrix K(s), is there an easy way to specify K(w) where w=s+delta?
Hi Vinh, I think the substitution backward. It should go like this: K(s) = C * inv(s*I - A) * B + D w = s + delta -> s = w ...

29 jours il y a | 0

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designfilt error in loop
In this messsage "Error in designfilt (line 189)," the "line 189" is refering to the line number in designfilt, not your code. ...

29 jours il y a | 0

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Convert Quaternion to Euler angle extrinsically
Hi Frank, According to a comment in this answer, there appears to be no function in any toolbox that works with extrinsic Euler...

29 jours il y a | 0

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Why the Hilbert transform is not correct using the hilbert function in Matlab?
I think the issue is that the assertion that the "Hilbert transform of cos is sin" is not correct for this problem. According to...

30 jours il y a | 0

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How to do a Biquad (SOS) filtering
Hi Jay, I think it works like this if you want to cascade the filters together into a single, sos filter. %% Filter_1 h = fde...

environ un mois il y a | 0

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Kalman filter for input estimation
The steady-state Kalman filter as implemented by kalman requires that the augmented realization be detectable, as opposed to mi...

environ un mois il y a | 0

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Discrete z to convert z^-1
z = zpk('z',-1); H = 0.0004773 * (z+0.9544)/ (z-0.9591) / (z-0.9064) H.Variable = 'z^-1'

environ un mois il y a | 0

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Multiple Bandpass Filter Creation
fs = 16e3; %range = [50 8000]; CF1=linspace(50, 8000, 32) -50; CF2=linspace(50, 8000, 32) +50; Can't use the first and las...

environ un mois il y a | 1

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