User`s guide

Table Of Contents

Time Delays

2-47

This creates the LTI model with the following transfer function.

Here is the entry of

Note: State-space models with I/O delays have only a frequency-domain

interpretation. They cannot, in general, be described by state-space equations

with delayed inputs and outputs.

Distillation Column Example

Thisexampleisadaptedfrom [2]andillustratestheuse ofI/O delaysinprocess

modeling. The process of interest is the distillation column depicted by the

figure below. This column is used to separate a mix of methanol and water (the

feed)intobottom products (mostly water) and a methanol-saturated distillate.

Hs()

sτ

–()r

s()exp

()

,()

Rs() DCsIA–()

–

B+=