Literature review and simulation study of feedback control of systems with dead time
Kefallinos, Ioannis (2021)
Julkaisun pysyvä osoite on
http://urn.fi/URN:NBN:fi:amk-202104074313
http://urn.fi/URN:NBN:fi:amk-202104074313
Tiivistelmä
In this thesis various common situations in system control with different dead times and model accuracy are used to test various controller applications to further understand and write down the effects of measured and unknown dead times on different commonly used feedback control systems and their tuning methods. This testing of controllers was done in a Single-Input-Single-Output, First order plus dead time context using Matlab-Simulink to analyze the effects both with measured and unknown dead time on controller performance.
After multiple tests it could be concluded that reactive controllers were slowed from measured dead time and these were able to give non-oscillating performance under compromised conditions. Predictive controllers were able to provide a performance with less over correction, but they were extremely vulnerable to incorrect evaluations of process dynamics and dead time errors. Both controllers-types have modifications to combat their weaknesses at a cost to the overall performance.
After multiple tests it could be concluded that reactive controllers were slowed from measured dead time and these were able to give non-oscillating performance under compromised conditions. Predictive controllers were able to provide a performance with less over correction, but they were extremely vulnerable to incorrect evaluations of process dynamics and dead time errors. Both controllers-types have modifications to combat their weaknesses at a cost to the overall performance.