Questions about PID?
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What is differential gain? What is inversion arithmetic?
Gain is the amplification factor, right? The inverse calculation? Where did I see this thing?
I once also posted a question regarding gain issues: http://bbs.hcbbs.com/viewthread.php?tid=561584&page=1#pid3155392
In the central control system, inversion calculation involves feeding the valve opening signal back to the PID, thereby establishing a closed-loop control system.
Hello, I saw this in DCS; it’s a parameter within DCS
What I’m asking is: is differential gain the amplification factor for differentials? So what is the difference between the concept of differential gain and the concept of differentiation?
In the central control system, inversion calculation involves feeding the valve opening signal back to the PID, thereby establishing a closed-loop control system. --------------- Firstly, PID is a form of closed-loop control. Does the inversion operation here refer to the reaction from the output of the closed-loop circuit? For reference only; if a reverse operation is required, there are generally three methods: 1. Reverse the input of pv and sp; 2. Use a negative value for p; 3. Subtract the maximum value from the output to perform the reverse operation.
In the control loop of a DCS, inversion calculation involves sending the output of the downstream module, through its inversion calculation output terminal (BACALCU OUT), to the inversion calculation input terminal (BACALCU IN) of the upstream module. Distract-free switching can be implemented when the system is initialized or when upstream and downstream modules resume connection after being disconnected.