Siv.ing. Kjell St=F8le-Hansen skal forsvare sin avhandling "Studies of some
Phenomena in Control Engineering Projects - With application to
Precipitation Processes" torsdag 28/5 kl.13.15 i R=E5dsalen, NTNU.
Pr=F8veforelesning over emnet "Component Based Software - Asses this
Technology as a Means for Developing Advanced Process Control Applications"
torsdag 28/5 kl.10.15 i R=E5dsalen, NTNU.
GJESTEFORELESNING
1.opponent prof.em. John Rijnsdorp vil holde en gjesteforelesning fredag
29/5 kl.10.15-11.00 i rom elektroblokk B, B343,over emnet OPTIMIZING
PROCESS OPERATION IN-THE-SMALL AND IN-THE-LARGE (se Abstract nedenfor).
Etter gjesteforelesningen blir det en uformell diskusjon rundt
INPRO-relaterte problemstillinger.
Abstract:
Traditionally, control systems are designed for maintaining process
variables near given values. But product yield and/or production efficiency
can be
improved by adapting these values to changes in process conditions. In
real-time this is usually realized by a model-based upper control layer,
which adjusts
set points at the lower traditional control layer. However, by adapting the
control structure as well, optimization is faster and more robust for model
errors.
For batch processes, this approach leads to "flexible recipes", whereby set
point trajectories are approximated by first-order or second-order
polynomials.
These recipes can extend over several parts of the total production chain,
so coordination is required between different local control systems.
Optimization in-the-large is a challenge at production sites, where
production plants share utilities. Here on-line linear programming models
can be utilized to
pinpoint bottlenecks and to adapt plant throughputs to changes in=
conditions.
In all cases, human factors play a critical role.
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Velkommen!
Bjarne Foss
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