Beantwortet
Stability margins for a cascaded system with getLoopTransfer functions
Hi Daam, To get the stability margins at 'e', I believe this is correct: Le = getLoopTransfer(CL,'e',-1); % open-loop function...

fast 3 Jahre vor | 1

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Fourier transform of an impulse response function
Hi Jason, syms t tau f real % SYSTEM I'd use heaviside, but piecewise works too. h = piecewise(t>=0, 0.01005*(exp(-t))*si...

fast 3 Jahre vor | 0

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I have 4 input channels (time series) and two output channels (time series) form test. I would like to calculate transfer function using tfestimate (MIMO).
Hi Dhiren, Have you tried the 'mimo' option of tfestimate (link to doc page) ?

fast 3 Jahre vor | 0

Beantwortet
Does Error Message Depend on Whether or Not Function is Executed Inside Try/Catch?
I put in a service request to Tech Support on this question. Their answer was that the error that's returned to the user does, o...

fast 3 Jahre vor | 1

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Beantwortet
Saving signals for each case of parsim() simulation
Hi TeraWatt, 1) Not sure what the issue is. I created a simple model with one logged signal. Ran the following script (R2022a)...

fast 3 Jahre vor | 0

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Problems with the creation of a randomic signal
Hi Andrea, How are you defining the bandwdith? fs=200000; %sampling frequency B = 5000; %bandwidth rng(1); n = 1e4; % no...

fast 3 Jahre vor | 0

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Beantwortet
Hello, I have problem with odeToVectorField in ODE second order system of equations.
The problem is confusion between sym expressions and symfun objects. g= 9.81; m= 0.468; Ix= 4.856e-3; Iy= 4.856e-3; Iz= 8....

fast 3 Jahre vor | 0

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readmatrix error handling in Simulink Matlab function
Try using exist: function y = fcn(u) coder.extrinsic('exist'); fileexists = 100.0; % dummy assignment to specify fileexist...

fast 3 Jahre vor | 0

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Frage


Does Error Message Depend on Whether or Not Function is Executed Inside Try/Catch?
This call to diff resolves to symbolic diff syms s diff(@(s) 1/(s+1),s) which diff(@(s) 1/(s+1),s) I guess the parser sees t...

etwa 3 Jahre vor | 1 Antwort | 0

1

Antwort

Beantwortet
Signal processing question (phase response of a digital filter)
Hi Paul, Can you provide a simple concrete, example that illustrates your concern? I suspect that you're seeing the difference...

etwa 3 Jahre vor | 0

Beantwortet
Why doesn't the noise density of the Allan deviation plot match the noise density of imuSensor?
Hi Tsz Hey Lam, The example in the link was for angle random walk (ARW), but the example in the question is using white noise. ...

etwa 3 Jahre vor | 0

Beantwortet
Using the command hinfsyn(), returns the error "Error using DynamicSystem/hinfsyn Plant P must have an explicit state-space realization".
Hi BIJIT, Running the code .... L=500e-6; C=40e-6; R=0.01; Ts=50e-6; w_lc = 1/(sqrt(L*C)); w_sys = 2*pi*60; s = tf('s');...

etwa 3 Jahre vor | 0

Beantwortet
Plotting a spectrogram with y axis values as whole numbers and time set to seconds
Hi Felix, Return the output arguments of spectrogram and then you can make any plot you want with any units in any of the dimen...

etwa 3 Jahre vor | 0

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2D FFT interpolation - Keeping the amplitude
Hi canadarunner, The plot on the left is amplitude and the plot on the right is in dB. Changing the left plot to dB brings the ...

etwa 3 Jahre vor | 0

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Beantwortet
Issues with SImulink Output to a Vector.
It sounds like you've solved the immediate problem. Based on what's been stated, the "vectorized" approach is taking advantage ...

etwa 3 Jahre vor | 0

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Beantwortet
Fourier transform of dynamic mode coefficients for impinging jet along a line from nozzle exit to plate at a distance 0.6 times jet diameter
Hi DEBI, It will be easier for people to help if yor provide all of the information needed to run your code. You should save th...

etwa 3 Jahre vor | 0

Beantwortet
How to expand symbolic exponential numerator to reduce fraction
syms Y_t A_t K_t alpha L_t k_t w_t y_t Y_t = A_t*K_t^alpha*L_t^(1-alpha) lil_y = y_t == Y_t/L_t labor_eqn = L_t == solve(li...

etwa 3 Jahre vor | 0

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Beantwortet
Bessel filter analog to digital
Hi Maurizio, freqs returns the frequency vector, wb, in units of rad/sec. freqz, as used below, returns the frequency vector, ...

etwa 3 Jahre vor | 1

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Conditionally executed functions in Simulink
A Triggered Subsystem may fit the bill. More generally, check Conditionally Executed Subsystems for more discussion.

etwa 3 Jahre vor | 0

Beantwortet
how to preferentially compute vector products rather than matrix products
"Is there any way to change this setting without bracket?" No. From the doc page for Operator Precedence: "Within each preceden...

etwa 3 Jahre vor | 0

Beantwortet
inverse Laplace transform in simulink
The Matlab Function block does not support any symbolic operations, as far as I know. I think the best you can do is structure t...

etwa 3 Jahre vor | 0

Beantwortet
Functions specgram and spectrogram - what does the spectogram' 3rd dimension mean and what unit it has?
Hi Peter, Until I read this question, I had never really thought about the outputs of spectrogram in an absolute sense. I only ...

etwa 3 Jahre vor | 1

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One of the systems I want to control includes disturbances in the input matrix. How can I convert this state space equation into a transfer function?
Combine u and d into a single input vector. Then the "B" matrix is composed of the Bbar and Ebar matrices concatenated together ...

etwa 3 Jahre vor | 1

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Beantwortet
Hello: i want to give a step input to my simulink function which starts at 1 second and ends at 1.1 seconds and having an amplitude of 0.1. Step block not working
Try using the Waveform Generator block with Waveform Definition parameter set to pulse with appropriate parameters. However, the...

etwa 3 Jahre vor | 0

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Beantwortet
why lsim return empty states?
According to the lsim doc page, the output x is returned when the input sys is a state-space model. The doc page further distin...

etwa 3 Jahre vor | 0

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Beantwortet
create a new array with group sum
Check out splitapply

etwa 3 Jahre vor | 0

Beantwortet
Incorrect number or types of inputs or outputs for function 'step'
Hi Archit, It would be much easier to help if you copy/paste the actual code into the Question rather than a large screen captu...

etwa 3 Jahre vor | 0

Beantwortet
ss2tf taking too long
Which version of ss2tf are you using? The one that ships with Matlab which -all ss2tf doesn't support sym inputs syms a b c d...

etwa 3 Jahre vor | 0

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Beantwortet
logging data from Simulink to workspace
Hi Asmaa, Because the signals are already in the simulation, why would there be a need to send them from Simulink to Matlab onl...

etwa 3 Jahre vor | 0

Beantwortet
Assistance with Transfer Function Output
The second input to lsim, called 'input' in the code, has to be a vector (becuase Hd is single input) of numerical values. So yo...

etwa 3 Jahre vor | 0

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