Ask the expert to introduce a prescription of Zhejiang University DCS algorithm.

No one answered. Although I am not an expert, I have a certain understanding of DCS system through years of work experience.

I think the algorithm should be that the air volume is converted into another control quantity, and the root of the air volume can linearly control another object, and there is a constant relationship (that is, 1992). It depends on which object is controlled by air volume and what is the relationship between them, so as to clearly understand the whole control process.

Temperature plus 273 is an expression to convert centigrade temperature into Kelvin temperature.

Pressure plus 8 1.26 estimates that the lower range of pressure transmitter is 20kpa, and pressure plus 8 1.26kpa converts relative pressure into absolute pressure, that is, relative pressure increases air pressure (20+81.26 =1.26kpa).

Multiply 1992 in front and 930.973 in the back, because the relationship between the square root of air volume and the constant of the controlled object has changed after temperature and pressure compensation.