The use of transmission line modelling to test the effectiveness of I-kaz as autonomous selection of intrinsic mode function

4th International Conference on Mechanical Engineering Research

Yusop, Hanafi M.^1 ; Ghazali, M.F.^1 ; Yusof, M.F.M.^1 ; Piremli, M.A.^1 ; Karollah, B.^2 ; Rusman^2

Advanced Structural Integrity and Vibration Research (ASIVR), Faculty of Mechanical Engineering, Universiti Malaysia Pahang, Pekan, Pahang, Malaysia^1

STIES, Jl. Prada Utama, Peurada, Syiah Kuala, Kota Banda Aceh, Aceh

24415, Indonesia^2

关键词: Automatic selection;    Filter techniques;    Flow fluctuations;    Hilbert Huang transforms;    Hilbert transform;    Intrinsic Mode functions;    Pressure transient;    Transmission line modelling;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/257/1/012070/pdf
DOI  :  10.1088/1757-899X/257/1/012070

来源: IOP

【 摘 要 】

Pressure transient signal occurred due to sudden changes in fluid propagation filled in pipelines system, which is caused by rapid pressure and flow fluctuation in a system, such as closing and opening valve rapidly. The application of Hilbert-Huang Transform (HHT) as the method to analyse the pressure transient signal utilised in this research. However, this method has the difficulty in selecting the suitable IMF for the further post-processing, which is Hilbert Transform (HT). This paper proposed the implementation of Integrated Kurtosis-based Algorithm for z-filter Technique (I-kaz) to kurtosis ratio (I-kaz-Kurtosis) for that allows automatic selection of intrinsic mode function (IMF) that's should be used. This work demonstrated the synthetic pressure transient signal generates using transmission line modelling (TLM) in order to test the effectiveness of I-kaz as the autonomous selection of intrinsic mode function (IMF). A straight fluid network was designed using TLM fixing with higher resistance at some point act as a leak and connecting to the pipe feature (junction, pipefitting or blockage). The analysis results using I-kaz-kurtosis ratio revealed that the method can be utilised as an automatic selection of intrinsic mode function (IMF) although the noise level ratio of the signal is lower. I-kaz-kurtosis ratio is recommended and advised to be implemented as automatic selection of intrinsic mode function (IMF) through HHT analysis.