How can model a nonlinear PID pressure and volume controller for medical ventilator application.

Design and Simulate a nonlinear PID pressure and Volume controller in a medical ventilator application. our ventilator have a blower, sensor dynamics and, Patiient hose dynamics.

Answer 1

[Sam Chak]

Hi @Amlakie Setargew

You can refer to the modeling of a positive-pressure medical ventilator system using Simscape here:

https://www.mathworks.com/matlabcentral/fileexchange/75012-medical-ventilator-model-in-simscape?s_tid=srchtitle

However, please note that PID Controller generally needs to be designed to satisfy some technical requirements.

[Sam Chak]

Hi @Amlakie Setargew

In my opinion, if you have not learned about nonlinear control but have a solid foundation in linear control, such as with the conventional PID controller, you might consider using the MATLAB Fuzzy Logic Designer app to create variable gains for the PID controller:

With the Fuzzy Logic Designer, you can manipulate the gains to high or low values using linguistic IF–THEN rules, even if the nonlinear math function is unknown. The nonlinearity of the PID gain arises from the fact that the nonlinearities are embedded within fuzzy membership functions, often without your awareness.