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Exact Parameter Estimation from Relay Autotuning under Static Load Disturbances
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posted on 2023-06-08, 07:06 authored by I Kaya, D P AthertonObtaining the parameters for PID controllers based on limit cycle information from the process in a relay controlled feedback loop has become an accepted practical procedure. If the form of the plant transfer function is known, exact expressions for the limit cycle frequency and amplitude can be derived in terms of the plant parameters, so that their measurements, assumed error free, can be used to calculate the parameter values. In the literature to date the solutions have only been considered for odd symmetrical limit cycles which will not be the situation when constant disturbances exist. Use of these expressions will lead to errors when the limit cycle is not odd symmetrical. The paper reports on exact parameter estimation for stable and unstable FOPDT or SOPDT plant transfer functions from relay autotuning under static load disturbances where the limit cycles are asymmetrical
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Publication status
- Published
Publisher
IEEEExternal DOI
Volume
4Page range
3274-3279Pages
5.0Presentation Type
- paper
Event name
American Control Conference, 2001Event location
ARlington, VA, USAEvent type
conferenceISBN
9780780364950Department affiliated with
- Engineering and Design Publications
Full text available
- No
Peer reviewed?
- Yes
Legacy Posted Date
2012-02-06Usage metrics
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