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Last seen: mer än 2 år ago | Active since 2020

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How to approximate a measured frequency response function to the sum of 2 1DOF vibration FRF functions?
I have measured the vibration frequency response function a structure (blue curves in the following diagrams). By using command...

mer än 2 år ago | 1 answer | 0

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answer

Question

How to set the frequency range of a nyquist plot?
I use the following command to draw a Nyquist plot a dynamic transfer function: s=tf('s'); G0=(d_x*(d_Fx*SYSD{1,1}+d_Fy*SYSD{2...

nästan 3 år ago | 1 answer | 0

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Question

Cannot change title of a saved figure." Unable to perform assignment because dot indexing is not supported for variables of this type."
I want to change the title of the figure I saved by running title('Ortskurve von G_0(jw), Volleingriff, Vorschub in -X-Richtun...

nästan 3 år ago | 1 answer | 0

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answer

Question

MATLAB cannot plot LinearModel: "Unable to perform assignment because dot indexing is not supported for variables of this type."
I created a LinearModel alpha_Approx (see attachment) by using fitlm function on a set of measured data points. When I try to p...

nästan 3 år ago | 1 answer | 0

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Question

How to fit a double-mass-vibration transfer function based on measured FRF (stored as idfrd value)?
I measured the frequency response matrix of a machine (0 - 200 Hz, with 0.5 Hz frequency resolution) exported as arrays of compl...

nästan 3 år ago | 1 answer | 0

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answer

Question

Can System Identification Toolbox do transfer function estimation based on measured FRF, without input / output data?
I have measured the vibration frequency response function of a structure and exported the response function as shown below. I w...

nästan 3 år ago | 1 answer | 0

1

answer

Question

How to add measured frequency response function to Simulink as a transfer function block?
I have a set of frequency response data gathered by modal analysis, which are stored in format (frequency, Re, Im) like the foll...

nästan 3 år ago | 2 answers | 0

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Question

How to create surface from stacked 2D plots?
I want to create a 3-d plot showing how the stability range (b_kx,b_ky) change depending on the time delay of the system (z-Axis...

mer än 4 år ago | 1 answer | 0

1

answer

Question

How to perform linearization in Simulink and export Nyquist plot by MATLAB code
In Simulink, a block or a subsystem can be linearized and analyzed in "Linear Analysis Tool" and its transfer function shown in ...

mer än 4 år ago | 0 answers | 0

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Question

Step response of an undamped 1DOF model in Simulink is still damped
I tried to simulate a 1DOF mass spring model with asymmetrical spring with k=10^9 N/m for x>0 and k=5*10^8 N/m for x<0 (model at...

mer än 4 år ago | 0 answers | 0

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