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# Alberto Mora

##### Last seen: 5 Tage ago
62 total contributions since 2017

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Question

Linearize error simulink model in Matlab function (cannot linearize abs())
I want to linearize a simulink model that use a MATLAB Function. Inside the MATLAB function I apply abs(x) and this create a fa...

etwa 2 Monate ago | 0 answers | 0

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Question

Linearize Simulink model simultaneously on signal with multiple channels
I want to linearize a Simulink model for a given input and a given output from MATLAB script, using linearize and linio command....

etwa 2 Monate ago | 0 answers | 0

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Question

How to visualize a Structural Reduced Order model (Superelement) from PDE library
I created a SuperElement (strucural Reduced Order Model from PDE toolbox), and now I want to use it as follow: Attach one super...

etwa 2 Monate ago | 0 answers | 0

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Compute Craig Bampton model reduction using structural PDE toolbox of MATLAB (FEM SuperElements - Component Mode Synthesis)
It seems that with the 2020a release, Mathworks introduced the superelements! You can find the documentation here.

etwa 2 Monate ago | 0

| accepted

Error using DynamicSystem/lsim
Please, do not use symbolic variables for the time array. t=0:0.01:10; H=tf(4,[5 5]); vi=(10.*(sin(10*t))).*(t<=18); v0=lsim...

etwa 2 Monate ago | 2

| accepted

Question

Differences between "Moist air" and "Gas" library of Simscape
Hello, assuming that I set the gas constant equal to the air constant (in order to adopt air properties in "Gas" library), what...

2 Monate ago | 1 answer | 0

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How can I filtrate recorded time acceleration signal with 4th order Butterworth low pass filter ??
If you sampled the signal at 200Hz it is useless adopt a low-passfilter at 100Hz since 100Hz is already the maximum bandwidth th...

2 Monate ago | 0

| accepted

Question

How to compute partial derivative for Lookup table in Simulink
Hello, I have a 2D look-up table in simulink, let's say for example z=f(x,y). How can I compute the partial derivative of such...

2 Monate ago | 0 answers | 0

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Submitted

Simscape Flexible Beam Stress (BeamStressLib)
Improved "General Flexible Beam" of Simscape, that compute von-Mises stress at beam ends for rectangular beams.

Differences between "Constraint Force" and "Total Force" of Weld Joint
As far as I understood, in this specific case are exactly the same.

2 Monate ago | 0

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Declare variables from Matlab function workspace to Simulink worskpace
At the end I found the solution to "send" the variables from the function workspace to the simulink workspace. ModelName='NameO...

2 Monate ago | 0

| accepted

Modify colobar values into a Function: error "Attempt to extract field 'YTick' from 'mxArray'"
Partially solved. Instead of call the colorbar and then modify it, I do it toghedar as follow: colorbar('Ticks',ValForColorbar,...

2 Monate ago | 0

| accepted

Phase difference removal by using Filtering, butterworth, filtfilt command
I think that you just need to do: Fs = 500; fcutlow = 6; % low cut frequency in Hz fcuthigh = 14; % high cut freq...

2 Monate ago | 0

| accepted

Question

Modify colobar values into a Function: error "Attempt to extract field 'YTick' from 'mxArray'"
Hi, into a Matlab Function in Simulink environment I want to modify the value shown by a colorbar (adding min and max values ...

2 Monate ago | 1 answer | 0

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Question

Colorbar not supported in Simulink "MATLAB function" surf plot
I have a custom surf plot written into a "MATLAB function" in simulink environment and I add the 'colorbar' in the plot to see t...

2 Monate ago | 1 answer | 0

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Question

How can I improve Simscape flexible beam results like FEM results
Hello, I want to improve the results of "Simscape Mechanics Explorer". In particular: I want to magnify small displacements of...

2 Monate ago | 0 answers | 0

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Question

Enable and Disable input/output subsystem's ports in Simulink
Hello, I created a subsystem with a mask with multiple "checkbox". The mask is used to interact with the subsystem (e.g. set co...

2 Monate ago | 1 answer | 0

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Question

If Action Block that create a stairstep signal in simulink
Hello, I have two questions: I use a If Block to "cut" the signal and not perform some operations (not depicted below). Is it ...

2 Monate ago | 1 answer | 0

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Question

Run Matlab FUNCTION at the end of Simulink simulation
Hello, in a simulink simulation I compute some signals. At the end of the simulation, when the system reach the steady-state c...

3 Monate ago | 1 answer | 0

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Question

Problem of color interpolation of surf plot
Hello, I notice problems with color intepolation using surf plot. There is a similar problem described here, but I can't modif...

3 Monate ago | 1 answer | 0

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Plot different length vectors on the same x-axis
So you have to do something like plot(matix1(:,1),matix1(:,2)); hold on; plot(matix1(1:173,1),matix2(:,2)); plot(matix1(1:173...

3 Monate ago | 0

| accepted

Question

How to estimate the correct value of "Damping Constant" for Flexible Beams in Simscape
Hello, Reading the Matworks info I notice that damping matrix is defined as proportional by the Damping Constant to the stiffne...

3 Monate ago | 0 answers | 0

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Loads and stress that act on flexible beams in Simscape Multibody environment
Until now I did not find the solution to extract directly the internal stress of the beam, as well as I am not able to find the ...

3 Monate ago | 0

| accepted

Question

How to run a Simulink simulation using keyboard
Hello, how can I run a simulink simulation using the keyboard, like I do for scripts using F5? Thanks and best regards - A

3 Monate ago | 1 answer | 0

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Question

How to get numerical info of "Derived Values" of Flexible Beams in Simscape Multibody
Hello, how can I access to the parameteres calculated on the "Derived Values" (e.g. Axial Rigidity, Mass per Unit Length) of a...

3 Monate ago | 0 answers | 0

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Question

Differences between "Constraint Force" and "Total Force" of Weld Joint
Which is the difference between Constraint Force and Total Force of Welded Joint in Simscape Multibody? Constraint are defined ...

3 Monate ago | 1 answer | 0

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Question

Distribuited load on flexible beams Simscape Multibody

3 Monate ago | 0 answers | 0

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How can you measure the flex in a general flexible beam in Simscape Multibody?
If you are interested into the relative displacement at the ends of the beams (eg bending deflection, elongation/compression etc...

3 Monate ago | 0

What's wrong with my FRF?
The average slope of the two lines suggest that in one case you are integrating the accelartion into velocity (orangeFRF) so you...

3 Monate ago | 1

| accepted

Question

Loads and stress that act on flexible beams in Simscape Multibody environment
Hello, I am using Simscape Multibody for creating a structural model of few flexible beams attached toghedar, like a sort of fr...

3 Monate ago | 1 answer | 0