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Relay Feedback and Wavelet Based Estimation of Plant Model Parameters

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posted on 2023-06-08, 07:14 authored by S Majhi, J S Sahmbi, D P Atherton
The paper presents a relay feedback and wavelet based method for the estimation of completely unknown processes for autotune purposes. From a single symmetrical relay feedback analysis a set of general expressions are presented for on-line process identification. Using these expressions the exact parameters of open loop stable and unstable first order plus time delay (FOPDT) and second order plus time delay (SOPDT) transfer function models may be obtained from simple measurements made on the limit cycle. However, noise in limit cycle output results in inaccurate estimate of the process model parameters. This paper proposes an effective mother wavelet for tracking the critical points of a noisy output signal. Further, using the wavelets based noise reduction it has been shown how accurate measurements can be made on the noisy limit cycle signal. Simulation studies illustrate the value of the proposed identification method

History

Publication status

  • Published

ISSN

0191-2216

Publisher

IEEE Control Systems Society

Volume

4

Page range

3326-3331

Pages

5.0

Presentation Type

  • paper

Event name

40th IEEE Conference on Decision and Control, 2001.

Event location

Orlando, Florida

Event type

conference

ISBN

9780780370623

Department affiliated with

  • Engineering and Design Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2012-02-06

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