A general algorithm for the split common fixed point problem with its applications to signal processing
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Publication Details
Author list: Jirakitpuwapat W., Kumam P., Cho Y.J., Sitthithakerngkiet K.
Publisher: Hindawi
Publication year: 2019
Volume number: 7
Issue number: 3
ISBN: 9781538677742
ISSN: 0146-9428
eISSN: 1745-4557
Languages: English-Great Britain (EN-GB)
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Abstract
This paper presents a comparative study of the effectiveness of two model-free techniques for compensating stiction effects in control valves. The approaches to be compared include the combinations of the control freezing (CF) and the variable amplitude (VA) pulse methods with the knocker and the constant reinforcement (CR) techniques. These techniques are compared with each other in terms the robustness to method parameters and estimated stiction size. Novel evaluation criteria namely the OPR-based objective functions and the VR-based objective functions which properly balance the integral absolute error (IAE) and the variations in control effort and valve movements are proposed. Simulation results show that combining CF with either the knocker or CR results in more robustness than the VA-based approaches. Moreover, according to our test results the best combination is CF+knocker. ฉ 2019 IEEE.
Keywords
Compensation, control valve, model-free, oscillations
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