Change of Time Variable

By making the change of time variable associated to the conveyor belt velocity

t

t(t) = J v(a)da, (7.63)

0

Подпись: where
Подпись: dw(z, T) dT
image385 image386

the PDE (7.62) that corresponds to the moisture model is written in the form

is a virtual manipulated variable. Once и is computed by the controller, the physical manipulated variables q and v are selected such as to satisfy (7.65). If the conveyor velocity v is imposed by considerations related to process throughput, then the hot air flow q is given by:

q (t ) = v(t )u(t ). (7.66)

Updated: August 21, 2015 — 2:47 pm