A bit of context:
I’m in a stundent project at my universtiy. We’re desingning and building an Mechanical ventilator for Corona-Patients. I’m having some trouble with the control loop of the system.
The ouput of the control loop is controlling a proportional valve. The purpose of this is to reach the desired pressure (Setpoint) in less than 3 seconds. I’m using a PID control, yet it’s not tuned correctly. That’s why I decided to go to basics, and get the transfer function from a step response, to then simulate the different constants in MATLAB.
The following step response was achieved by opening the proportional valve fully, and waited till the Setpoint was achieved. There’s a 1 bar relative pressure in the system. Any pressure above 25mbar flows out, through a PEEP valve. The proplem with the system is that we can’t overshot, because we cannot get rid of this pressure as the patient is inhaling.
If someone could help me, calculate the transfer function of the following step response, I would be really gratefull.

Thanks in advance.A bit of context:
I’m in a stundent project at my universtiy. We’re desingning and building an Mechanical ventilator for Corona-Patients. I’m having some trouble with the control loop of the system.
The ouput of the control loop is controlling a proportional valve. The purpose of this is to reach the desired pressure (Setpoint) in less than 3 seconds. I’m using a PID control, yet it’s not tuned correctly. That’s why I decided to go to basics, and get the transfer function from a step response, to then simulate the different constants in MATLAB.
The following step response was achieved by opening the proportional valve fully, and waited till the Setpoint was achieved. There’s a 1 bar relative pressure in the system. Any pressure above 25mbar flows out, through a PEEP valve. The proplem with the system is that we can’t overshot, because we cannot get rid of this pressure as the patient is inhaling.
If someone could help me, calculate the transfer function of the following step response, I would be really gratefull.

Thanks in advance. A bit of context:
I’m in a stundent project at my universtiy. We’re desingning and building an Mechanical ventilator for Corona-Patients. I’m having some trouble with the control loop of the system.
The ouput of the control loop is controlling a proportional valve. The purpose of this is to reach the desired pressure (Setpoint) in less than 3 seconds. I’m using a PID control, yet it’s not tuned correctly. That’s why I decided to go to basics, and get the transfer function from a step response, to then simulate the different constants in MATLAB.
The following step response was achieved by opening the proportional valve fully, and waited till the Setpoint was achieved. There’s a 1 bar relative pressure in the system. Any pressure above 25mbar flows out, through a PEEP valve. The proplem with the system is that we can’t overshot, because we cannot get rid of this pressure as the patient is inhaling.
If someone could help me, calculate the transfer function of the following step response, I would be really gratefull.

Thanks in advance. control_loop, pid, transfer function, step response MATLAB Answers — New Questions

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