Readers are familiar with Michael Brown's popular series of articles on control loop optimisation. Many may be pleased to hear that Michael Brown Control Engineering now has a website - have a look at www.controlloop.co.za
This month's Control Loop article focuses on final control elements.
Michael Brown is a specialist in control loop optimisation, with many years of experience in process control instrumentation. His main activities are consulting and teaching practical control loop analysis and optimisation. He gives training courses that can be held in clients' plants, where students can have the added benefit of practising on live loops. His work takes him to plants all over South Africa and also to other countries.
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If nonlinearity occurs it means that if one is to carry on controlling with the same response to changes in load or setpoint, then the tuning of the controller will also need to be adjusted to meet the new conditions.
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