M
Hi everyone,
Currently I'm working on open loop process project where there are two fluids going to mixed inline before delivering to a drum.
Basically, the process is 2 inputs and 1 output, the first input is slightly change in in terms of density when it comes from supplier. The second input (chemical liquid) is the main input that if i control it probably i can reach my set-point (density).
no valves included so i have to control the speed of the both pumps. i think if i consider the first input as disturbance as its vary.
There will be density sensor to measure the output (my feedback signal) goes to the PLC Controller (Allen Bradley), VFD between the PLC and the Pump. also i have density sensor to measure density for the first input.
so the question here is: do i need flow meter to measure my second input to control the speed of the pump based on my density feedback signal? or just by using the density sensor from the output i will be able to control the speed of the pump based on my set-point?
whats the proper way to design a closed loop system? and is there other hardware requirement that i need?
also i need a help to construct the feedback and feedforward control strategy to reject the first input disturbance or any recommendation please.
Thank you very much
Currently I'm working on open loop process project where there are two fluids going to mixed inline before delivering to a drum.
Basically, the process is 2 inputs and 1 output, the first input is slightly change in in terms of density when it comes from supplier. The second input (chemical liquid) is the main input that if i control it probably i can reach my set-point (density).
no valves included so i have to control the speed of the both pumps. i think if i consider the first input as disturbance as its vary.
There will be density sensor to measure the output (my feedback signal) goes to the PLC Controller (Allen Bradley), VFD between the PLC and the Pump. also i have density sensor to measure density for the first input.
so the question here is: do i need flow meter to measure my second input to control the speed of the pump based on my density feedback signal? or just by using the density sensor from the output i will be able to control the speed of the pump based on my set-point?
whats the proper way to design a closed loop system? and is there other hardware requirement that i need?
also i need a help to construct the feedback and feedforward control strategy to reject the first input disturbance or any recommendation please.
Thank you very much