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Unformatted text preview: inear model for disturbance Fitting Alternat ive Linear model for disturbance Select ion Alternat ive Linear model for disturbance Fitting Alternat ive Linear model for disturbance
Fitting Alternat ive Linear model for disturbance Alternat ive Linear model for disturbance Process model for simulat ion Disturbance model for simulation Linear model simulation Process response for a disturbance change
Linear model simulation Process response for an input change Final verdict on model selection: For the manipulated variable changes a simple first order plus t ime delay model is enough. For the disturbances changes, to be able to represent the more co mplex dynamics invo lved, a first order model wit h a lead and a delay terms is necessary. This is the only model to be able to represent the inverse response behavior. Why these types of response for a disturbance change? We have two effects act ing together in opposite ways and at different time scale...
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 Fall '08
 Hjortso,M
 pH

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