Dear researchers, how can can I simulate nonlinear disturbance observer for UAV on Simulink?

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I want to model this nonlinear disturbance observer - - on Simulink, in order to estimate the disturbance. Any relevant help is well appreciated.

Risposta accettata

Sam Chak
Sam Chak il 28 Giu 2022
As you didn't provide sufficient explanations for the problem and I don't know what it is, so I just integrated the given differential equation in the blue NDO Fcn block as usual, and this is the simplest example I can make with the disturbance :
Hope it works out for you.
  13 Commenti
Sam Chak
Sam Chak il 30 Giu 2022
Great to see that it works out. @ALABA PHILIP OPAYEMI
Anyhow, you should understand that any constant term that goes into the NDO (to be integrated) can be a "suspect".
And the is just one of the prime suspect if it does not get cancelled out by your control input u.

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Più risposte (2)

Sam Chak
Sam Chak il 5 Set 2022
There are two Dryden Wind Turbulence Model blocks: one is continuous and the other is discrete. Check out the links:
  1. https://www.mathworks.com/help/aeroblks/drydenwindturbulencemodelcontinuous.html
  2. https://www.mathworks.com/help/aeroblks/drydenwindturbulencemodeldiscrete.html
You can also see this example on how the disturbance model is implemented.
If you find the guidance is helpful, please consider voting 👍 the Answer. Thanks!
  4 Commenti
UASLAB
UASLAB il 6 Set 2022
Thank you @Sam Chak
...I presume that you are Aeronautical Engineering Guy...No, you are not...
I will work on the insights you have given.
Thank you.
UASLAB
UASLAB il 6 Set 2022
Dear sir @Sam Chak,
I have tried to incorporate the DCM and other necessary input parameters into the model but did not work. I am yet to understand how to implement it...
However, I have been using this model(https://www.mathworks.com/help/simulink/slref/aircraft-longitudinal-flight-control.html) below and it works; except that I do not know how to vary the parameter to get different desired wind speeds as I am yet to come accross any documentation on it.
Thank you.

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UASLAB
UASLAB il 5 Set 2022
Dear @Sam Chak,
please, I need help on how to implement Dryden wind model for simulating wind disturbance in Simulink.
Thank you.

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