Abstract
This paper discusses the estimation of the parameters of a first order plus dead-time process model using the closed-loop step response data of the process under proportional plus integral (PI) control. The proportional gain and the integral time, in the PI controller, are chosen such that the closed-loop step response exhibits an under-damped response. From this response data, five characteristic points are used to determine a second order plus dead-time model and subsequently, the frequency response of the closed-loop system. Knowing the dynamics of the closed-loop system and the dynamics of the controller, the open-loop dynamics of the process can be determined by separating the dynamics of the controller from the closed-loop dynamics.
| Original language | English |
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| DOIs | |
| Publication status | Published - 2002 |
| Event | Irish Signals and Systems Conference - Cork, Ireland Duration: 1 Jun 2002 → 30 Jun 2002 |
Conference
| Conference | Irish Signals and Systems Conference |
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| Country/Territory | Ireland |
| City | Cork |
| Period | 1/06/02 → 30/06/02 |
Keywords
- first order plus dead-time process model
- closed-loop step response
- proportional plus integral control
- under-damped response
- second order plus dead-time model
- frequency response
- open-loop dynamics