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Pat Gipper


Array of Engineers

Last seen: 1 día hace Con actividad desde 2020

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I have trouble getting MATLAB to increase altitude or plot tail height upward when I use a positive number. I have to use a negative number. Why is this???
The NED (North East Down) coordinate system is positive in the plane crashing direction. That's why it is good to use a negative...

6 meses hace | 0

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Respondida
Error/Mismatch in determing impedance using fft in simulink imported data.
@Md. Golam Zakaria You can use the variable step solver and force it to output at fixed intervals by putting a "Sample time" val...

6 meses hace | 1

Respondida
FFT of a frequency sweep using logarithmic spacing.
Here is some code to perform the logarithmic chirp normalization. % Define parameters clear norm N = 1; % Ch...

6 meses hace | 1

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Respondida
FFT of a frequency sweep using logarithmic spacing.
The correction factor for a linear chirp is sqrt(beta) / df, where beta is the chirp rate in Hz/sec and df is the FFT bin size i...

6 meses hace | 1

Respondida
Simulink to see Fourier
I put it in a Matlab Fcn block and it seems to work. See the attached file for details.

7 meses hace | 0

Enviada


Frequency Response Analyzer
Perform frequency analysis of your Simulink model without linearization

11 meses hace | 237 descargas |

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PV MPPT Tracking Failing PV Array Current or Volatge Goes negative
Hi Ishaan. I found that a perturbation of 1% (Constant2 with value of 1) was too large in the controller. If you reduce the Cons...

más de 2 años hace | 0

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Respondida
Model error in Simulink
It is having problems simulating an ideal op amp with infinite gain. If you intend on configuring the LM386 op amp as an invert...

más de 2 años hace | 0

Respondida
create a variable that changes its value(polynomial equation) for different time periods
Maybe something like this.

más de 2 años hace | 1

Respondida
Adding noise to a PID signal
Hi Nathan, You can use the lsim command to get a general response of your controller. I think you want to see the response when...

más de 2 años hace | 0

Pregunta


Why the different response of two Simulink models?
Here is a follow-on question to this original question: How can I remove the few peaks before the overshoot, so I only have the...

más de 2 años hace | 1 respuesta | 0

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How can I remove the few peaks before the overshoot, so I only have the overshoot peak and then it directly transition into steady state?
Hi Samuel. I found tuning the derivative to be difficult too. Eventually I settled in on P=3.5, I=850, D=0.01 and N=850. The def...

más de 2 años hace | 0

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Can you let me know how to solve my errors? there are 4 errors in my simulink.
You had two issues. One was the integrators in Current_Controller were implimented using the Memory in the feedback path causing...

casi 3 años hace | 1

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Respondida
Data type mismatch error in Simulink
I saw a number of other issues in this model. 1) I think the inverter needs a ground reference added on the emitters of the low...

casi 3 años hace | 0

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I need more explanations for the described hydraulic simulation
The pump in this model acts in a fixed displacement mode that produces a given flow rate regardless of its output pressure. When...

casi 3 años hace | 0

Respondida
Filter background from audio file
Check out this previous answer. A different type of owl, but the same concept. Using Spectrogram to Design a Filter - (mathwork...

casi 3 años hace | 0

Respondida
Simulation of the step response of a time delay system with a PID controller is contorted.
Those sharp transients in the closed loop response are the echoes of the step input as filtered by the transfer function that ar...

casi 3 años hace | 0

Respondida
3rd Order ODE on Simulink
I approximated the required doublet input into an update to my comment with a summation of two very short pulse generators.

casi 3 años hace | 0

Respondida
Why is my step response going down instead of up?
I would focus on your equation for zeta on line 60. It is resulting in a negative value (negative damping=bad!) which gives unst...

casi 3 años hace | 1

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Respondida
An electric circuit that includes a voltage source E with an internal resistance r, and a load resistance R is shown in the figure.
Probably late for your homework assignment. Can you write the equation for the power dissipated in R leaving R as a variable? Do...

alrededor de 3 años hace | 0

Respondida
Unexpected noise in output voltage for buck converter
The Puse Generator has a period of 1/100000 seconds, which is injecting 100 KHz pulses into your system. The ripple is simply th...

más de 3 años hace | 0

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Reproduce electric motor maps as images in Matlab Simulink
A similar question was answered suggesting importing the image into Matlab and then using ginput to extract coordinates of the a...

más de 3 años hace | 0

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Determining time elapsed in between two successive pulses of a signal
I updated your code a bit and fed in an artificial signal. It works but has a slight error due to loop delays running on my comp...

más de 3 años hace | 1

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How best to gather signals from all over a SIMULINK model to one subsystem
I moved your root model into a subsystem and used Bus Element Out(s), which was then connected to a new input on "get data" subs...

más de 3 años hace | 0

Respondida
A question about FOC current control for PMSM
The decoupling control is not quite correct for the PMSM motor you are using. You need to insert a multiplier by the number of p...

más de 3 años hace | 1

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Respondida
How to measure the steady state amplitude of a control system output
Try using this app. It injects a sine wave and measures the gain and phase after a number of cycles that you specify. https://w...

más de 3 años hace | 0

Respondida
How to programmatically know if a block is a sink block?
I had to add some complexity to your code to make it work on my sample file. modelfile = 'SinkXY';% Or whatever your model file...

más de 3 años hace | 0

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Need help with simple Simulink
This seems to do the trick. It produces the following result.

casi 4 años hace | 1

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Respondida
Simulation of a missile valve with Simscape
Hi Tom, A flip-flop will latch the valve shut once the flow reaches the threshold and keep it shut until you manually reset it....

casi 4 años hace | 1

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