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How can I use allmargin() with non-unity feedback?
Hi Erik, What's the loop transfer function, L(s), from which one could compute the stability margins (having already determined...

27 jours il y a | 1

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How to use exp^s for a transfer function in matlab
Models with internal delays are implemented in state space form. Ts = 1/2000; s = tf('s'); Gd = exp(-1.5*s*Ts); With Gd on...

environ un mois il y a | 0

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Is there a way to compute the n-th symbolic derivative of a function where n is also symbolic?
Hi Matt, I don't think so, at least not using diff syms f(x) x syms n positive real integer % Define the function for which...

environ un mois il y a | 1

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gridureal samples does not match the sampled system.
Hi Mohammad, I confess that I can't explain how dss is implementing this uncertain, descriptor system. I'm particularly curious...

environ un mois il y a | 0

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cosd() giving similar value for different angles
data = load('LatLong.txt'); speed_km = data(:, 1); latitude = data(:, 2); longitude = data(:, 3); The latitude is quite s...

environ un mois il y a | 0

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Understanding FFT in MATLAB
Hi Janee, Speaking only to the Matlab side of this question, why would it expected that the rows of u1 and up be the same? Each...

environ un mois il y a | 0

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Typo in the nufft (R2024a) documentation?
Hi Ana, Yes, either the plot command was intended for X or the ylabel is wrong. In the context of that example, I suspect they ...

environ un mois il y a | 0

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Question

How Does mldivide Work for Full, Square, Full Rank, Triangular Matrix?
How does mldivide work when the input matrix A is full, square, full rank, and triangular? The doc page just say it uses a trian...

environ un mois il y a | 1 réponse | 0

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Plot Piecewise function graph
This line y(i) = 1./log(2)*sin(x(i)); is incorrect. The order of operations for multiplication and division is that they ar...

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How to use parameter callback to parameterize mask workspace?
What happens if you just enter T = 1/f; in the Initialization section and leave the f_callback blank, or delete it altogether?...

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Inverse of a symmetric matrix consisting of submatrices is desired.
I wasn't going to post this as it didn't seem like a useful answer, but, since @Torsten raised the idea of using the block matri...

environ un mois il y a | 0

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Assumptions are not being considered in symbolic math.
Hi Nick The issue is that the code is using linsolve, which doesn't know anything about the assumptions on the m_i. Generate a...

environ 2 mois il y a | 0

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piecewise function Fourier seriers
Hi KUN, In the context of the Fourier transform, I'm not sure that the assumption on t makes sense, at least not in the context...

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want to differentiate 1+c*exp(t)/1-exp(t) which is 2*c*exp(t)/(1-exp(t))^2 and then return it to it's original form by integration using int(), understand rewrite(tanh,"exp")
Hi Joseph, I think you got the correct result, though not using what might be considered best practices syms f c t y(t) y ypri...

environ 2 mois il y a | 1

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Problem with using mussv
Hi Ofek, N = 30; w_vec = logspace(-5,5,100); "I calculate it using the function freqresp and the resulting array has dimensio...

environ 2 mois il y a | 0

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Question

What Does the Symbolic Math Toolbox Mean by 0 < s When s is Complex?
syms s syms t real f = int(exp(-s*t),t,-inf,0) What does that first condition mean insofar as s is complex?

environ 2 mois il y a | 1 réponse | 0

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Question

Does the Symbolic Toolbox Support 0- and 0+ ?
syms s syms t real f = int(exp(-s*t),t,-inf,0) Is the second term in the second condition a notation for (though I'm not e...

environ 2 mois il y a | 1 réponse | 0

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Adjusting a Sawtooth Graph and getting spectrum
Do you want a triangle or a sawtooth? Assuming the former as stated in the question, use tripuls %T = 10*50; fs = 2000; t = ...

environ 2 mois il y a | 0

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how to find Laplace transform of u(-t) in MATLAB?
Hi Sundaram, The function laplace implements the unilateral Laplace transform for causal signals. However, heaviside(-t) is no...

environ 2 mois il y a | 0

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How can a Simulink State Space block state be periodically reset?
i think you'll have to use an Integrator and other native blocks to implement xdot = A*x + B*u y = C*x + D*u Use the external...

environ 2 mois il y a | 0

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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 mois 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 2 mois 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...

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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 ...

2 mois 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...

2 mois 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...

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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(...

2 mois 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 ...

2 mois 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...

2 mois 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); ...

2 mois il y a | 0

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