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Robust Control: dksyn example
I believe the issue here is that: the plant is unstable, the construction of P2 duplicates all of the states in the generalize...

5 mois il y a | 0

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A quarter car model with additional massless degree of freedom for the top mount
Hi @Simon Aldworth Seems like the equation for the massless element would be: m5*x5ddot = kp * (x1 - x5) + cs * (x2dot - x5dot...

5 mois il y a | 0

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How can I store data from my simulink model in and and use it during runtime.
Does the trigger event enable the execution of an enbabled subsystem? Is the data to be captured from a signal inside that enabl...

5 mois il y a | 0

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simulink reference block or library block
Hi stephane, Component-Based Modeling Guidelines - MATLAB & Simulink is a good place to start, followed by the links at the bot...

5 mois il y a | 0

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searchin for an M file in all folders of my PC.
The dir command can recursively search. I think for this question it would be d = dir("C:\**\filetofind.m")

5 mois il y a | 1

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Repeated uncertanity Blocks in robust control
Hi Amit, As far as I can see, mussv does not support repeated, full, complex blocks. Out of curiosity, in what sort of problem...

5 mois il y a | 0

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Why Does ifourier Not Return Equivalent Results for Equivalent Transforms?
Tech Support confirmed a bug (and it's quite pernicious IMO). Their suggested workaround for this particular problem is to simp...

5 mois il y a | 1

Question

Why Does ifourier Not Return Equivalent Results for Equivalent Transforms?
Consider two expressions of a Fourier transform syms t omega real HU(omega) = -(exp(-omega*1i)*(exp(omega*1i) - 1)*(omega + 1i...

5 mois il y a | 1 réponse | 0

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Any way to remove terms smaller than "digits" from symbolic expression? R2023a
"Uh, it's always the term that's on the order of the smallest number representable by digits." Giving the benefit of the doubt ...

6 mois il y a | 1

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Accessing Simulink model inputs and outputs when stepping model via MATLAB set_param(mdl, 'SimulationCommand', 'step') command
Hi Sebastian, Check out the doc page for using a simulation object. It make it easier to do what you want.

6 mois il y a | 1

Question

Why Doesn't pwelch with the 'centered' Option Follow the Same Convention as fftshift for Even nfft?
When the fft length is even, fftshift flips the input so that the Nyquist point is to the left. But pwelch with freqrange = 'cen...

6 mois il y a | 1 réponse | 0

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Question

Should Unity Value be Displayed when Multiplied by a symunit?
The following results look peculiar IMO. Shouldn't a unit always be preceded by a value? I've never seen this convention before....

6 mois il y a | 1 réponse | 0

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Adding a single left bracket and a single right bracket to a matrix
I'm not sure if this can be done in the command window, but in a Live Script matrix output can be shown with square brackets. A...

6 mois il y a | 1

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problem with coeffs command
syms w z u y v x 5*w - 5*z - u*((603367941593515*x)/4503599627370496 - y/2) - v*(x/2 + (603367941593515*y)/4503599627370496) - ...

6 mois il y a | 1

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power spectral density of nonstationary data
Hi hxen, When uploading the data in a .csv file, please also include the code that reads the data from that file. It wasn't har...

6 mois il y a | 0

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Can Simulink and other simulation software be repeatedly executed through Matlab scripts when simulating together？
Hi yiwei, There are several options for running Simulink simulations from Matlab scripts. Start from Run Simulations and then g...

6 mois il y a | 0

Question

Does isAlways Make an Unwarranted Assumption that a Variable is real?
Define a sym variable syms v isAlways can't prove that v is real. Makes sense. isAlways(in(v,'real')) Now make an assumption...

6 mois il y a | 1 réponse | 2

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Biquad IIR filter design with Q factor sorting?
Hi Jay, h = fdesign.lowpass('N,Fc', 8, 10e3, 100e3); % 4-biquad with 100kHz sampling rate and 10kHz cutoff freq Hd = design(h...

6 mois il y a | 0

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Unable to access parameters of the block "enable"
The "Data Type" parameter is on the Signal Attributes tab, but as stated in the Block Parameters dialog (as shown in the sceen c...

6 mois il y a | 0

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CONVERT FREQUENCY DOMAIN DATA TO TIME DOMAIIN
Here's an example that illustrates the potential utility and pitfalls of this approach. EDIT: 19 Jan 2026, updated code to ensu...

7 mois il y a | 1

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Can this symbolic expression be simplified anymore?
"In terms of simplifying, you could flip upside down to get rid of the one/over." Can try using numden, though the result might...

7 mois il y a | 0

Question

Is the Order of Function Evaluation Guaranteed when Function Outputs are Concatenated into an an Array?
Suppose I call two functions within concatenation into an array A = [ones(1,2),zeros(1,2)] In this case, the order in which on...

7 mois il y a | 2 réponses | 1

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How do I perform a proper FFT of a gated segment of a time domain waveform with a logmag amplitude?
Generate a 512-point reference signal in the time domain Ts0 = 0.01; Fs0 = 1/Ts0; N0 = 512; n0 = 0:N0-1; t0 = n0*Ts0; y0 =...

7 mois il y a | 0

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Find the transfer function of a differential equation symbolically
The function isolate comes in handy for this type of problem. syms u(t) y(t) dydt(t) t s Y(s) U(s) y0 dydt0 u0 omega_n z K % S...

7 mois il y a | 1

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Comment utiliser les transformées de Laplace ? How to use Laplace transforms
Hi Gilles, The documentation provides a detailed example at Solve Differential Equations of RLC Circuit Using Laplace Transform...

7 mois il y a | 0

Question

How Does interp1 Work if the Sample Points are not Monotonic?
Forever I've thought that the sample points input to @doc:interp1 have to be distinct AND monotonic. But I just saw on the doc p...

7 mois il y a | 1 réponse | 0

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Linear interpolation with interp1 is slow: How to improve run times?
Hi Alessandro, The base version of interp1 is an ordinary m-file, so you can see all of the extra processing it needs to do to ...

7 mois il y a | 3

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Question

Is this Application of Leibniz Rule in Symbolic Math Toolbox Incorrect?
Referring to Leibniz Integral Rule: Verify R2025b matlabRelease Define some functions syms t x syms f_1(x) f_2(x) g(t) Cas...

7 mois il y a | 1 réponse | 0

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Trouble with Interp2
Hi Peter, I think the arguments to interp2 are backwards, but there are some other considerations Ir_10nm_Cr_10nm= [... 0....

7 mois il y a | 0

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"diff" function doesn't work properly with small numbers
The data in gora and dol are on the plot as can be seen below when using markers. However, if the y-data pattern is increasing-...

7 mois il y a | 1

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