- #1
nlis12
- 32
- 3
The butterfly valve I have is controlled by sending voltages to it. It accepts 0-10V and maps a specific voltage to a specific position from completely closed (zero degrees) to completely closed (90 degrees).
To clarify/reiterate it is not controlled by a servo motor.
I am using this valve to control the pressure inside of a cylindrical chamber with a constant air flow from the inlet to the outlet (where the valve is).
So I tried to implement a PID controller on the valve in order to control the pressure.
The problem is that the PID outputs always rail to 0V (completely closed) or 10V (completely open) and no positions in between. (I have spent hours tuning the P,I,D constants and nothing seems to change the operation)
Is this system something you should control with a PID loop?
Are there other control schemes that would be applicable in this case?
To clarify/reiterate it is not controlled by a servo motor.
I am using this valve to control the pressure inside of a cylindrical chamber with a constant air flow from the inlet to the outlet (where the valve is).
So I tried to implement a PID controller on the valve in order to control the pressure.
The problem is that the PID outputs always rail to 0V (completely closed) or 10V (completely open) and no positions in between. (I have spent hours tuning the P,I,D constants and nothing seems to change the operation)
Is this system something you should control with a PID loop?
Are there other control schemes that would be applicable in this case?