Sound Reconstruction of an Overdetermined Mixture in a Mini Plant: An Experimental Study

[摘要] In this study, we propose a sound-based signal analysis technique emitted by rotating machines. Three water pump machines are set in a row to reflect a mini plant. We raise an overdetermined case with four sensors that are used to record three machines' signal sounds with unbalanced, normal and bearing fault conditions. We use non-negative matrix factorization (NMF) approach to reconstruct the signal sounds of each machine which had previously been mixed. Based on the results, the type of engine damages can be determined based on the fundamental frequency of each machine. The first reconstructed signal1 is similar to the baseline signal of normal machine with LSD of 1 and MSE of 5.84 × 10-9 The second reconstructed signal2 has a similarity to the baseline signal of the machine with bearing fault with LSD of 1 and MSE of 1.10 × 10-7, while the third reconstruction signal3 is similar to the machine's baseline signal with unbalanced condition,that is, LSD of 1.02 and MSE of 1.38 × 10-8.

[发布机构] Department of Engineering Management, Universitas Internasional Semen Indonesia, Gresik; 61122, Indonesia^1;Department of Engineering Physics, Institut Teknologi Sepuluh Nopember, Surabaya; 60117, Indonesia^2;Department of Information System, Universitas Internasional Semen Indonesia, Gresik; 61122, Indonesia^3

[效力级别] 无线电电子学

[关键词] Analysis techniques;Bearing fault;Engine damage;Fundamental frequencies;Nonnegative matrix factorization;Overdetermined mixtures;Rotating machine;Unbalanced condition