Hi,
I'd like to know how do you control a system with a long delay in it's response. E.g.:
I have to control the flow in a duct. I can regulate analogicaly the opening of a floodgate, but the measurement point (from where I get the feedback signal) is 500 mts downstream.
So, initially I will be measuring 0 m3/s. If I use a PID control, my output will grow and grow opening the gate more and more. By the time the water reaches the feedback point the flow will be much bigger than I need it to be.
Other example could be controlling a temperature where the heater element is away from the termometer.
And I guess there must be a lot other systems like this.
Can anyone tell me how do you control a system like this ?
Thanks a lot.
I'd like to know how do you control a system with a long delay in it's response. E.g.:
I have to control the flow in a duct. I can regulate analogicaly the opening of a floodgate, but the measurement point (from where I get the feedback signal) is 500 mts downstream.
So, initially I will be measuring 0 m3/s. If I use a PID control, my output will grow and grow opening the gate more and more. By the time the water reaches the feedback point the flow will be much bigger than I need it to be.
Other example could be controlling a temperature where the heater element is away from the termometer.
And I guess there must be a lot other systems like this.
Can anyone tell me how do you control a system like this ?
Thanks a lot.