naa a22 4500 510822673 CHVBK 20180411083541.0 cr unu---uuuuu 180411e20130701xx s 000 0 eng 10.1007/s12541-013-0159-y doi (NATIONALLICENCE)springer-10.1007/s12541-013-0159-y An approach to monitoring the thermomechanical behavior of a spindle bearing system using acoustic emission (AE) energy [Elektronische Daten] [Leh-Sung Law, JongHyun Kim, Willey Liew, Sun-Kyu Lee] Real time condition monitoring plays a key role in modern manufacturing processes. Critical processes, however, require systems capable of early detection and rapid adjustment of bearing conditions in order to ensure processing quality. Specifically, the spindle stiffness is significantly affected by the bearing contact pressure, which in turn is readily changed by thermal effects. A technique is proposed to monitor the spindle condition via acoustic emission (AE) signals. This method implements an analysis combining wavelet packet decomposition, Hilbert-Huang Transform, and screening processes (WPD-HHT) to extract the crucial characteristics from the measured signal to identify the running state of a spindle bearing. The implementation of the WPD-HHT envelope technique is also presented. Acoustic emission signals as well as the temperature growth measured from the spindle housing are used in the investigation. The results show that the proposed WPD-HHT and WPD-HHT envelope techniques enable the extraction of the most important signal features and their presentation in term of energy values. The displayed energy value is correlated to the preload changes since the temperature of the rolling bearing increases with AE energy. Korean Society for Precision Engineering and Springer-Verlag Berlin Heidelberg, 2013 Bearing condition monitoring nationallicence Thermomechanical behavior nationallicence Acoustic emission energy nationallicence Spindle bearing system nationallicence Wavelet packet decomposition (WPD) nationallicence Hilbert-Huang transform nationallicence WPD-HHT envelope technique nationallicence Law Leh-Sung School of Mechatronics, Gwangju Institute of Science and Technology, 1 Oryong-dong, Buk-gu, 500-712, Gwangju, The republic of South Korea aut Kim JongHyun School of Mechatronics, Gwangju Institute of Science and Technology, 1 Oryong-dong, Buk-gu, 500-712, Gwangju, The republic of South Korea aut Liew Willey School of Engineering and Information Technology, University Malaysia Sabah, Beg Berkunci 2073, 88899, Kota Kinabalu Sabah, Malaysia aut Lee Sun-Kyu School of Mechatronics, Gwangju Institute of Science and Technology, 1 Oryong-dong, Buk-gu, 500-712, Gwangju, The republic of South Korea aut International Journal of Precision Engineering and Manufacturing Springer Berlin Heidelberg 14/7(2013-07-01), 1169-1175 2234-7593 14:7<1169 2013 14 12541 https://doi.org/10.1007/s12541-013-0159-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12541-013-0159-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Law Leh-Sung School of Mechatronics, Gwangju Institute of Science and Technology, 1 Oryong-dong, Buk-gu, 500-712, Gwangju, The republic of South Korea aut NATIONALLICENCE 700 1- Kim JongHyun School of Mechatronics, Gwangju Institute of Science and Technology, 1 Oryong-dong, Buk-gu, 500-712, Gwangju, The republic of South Korea aut NATIONALLICENCE 700 1- Liew Willey School of Engineering and Information Technology, University Malaysia Sabah, Beg Berkunci 2073, 88899, Kota Kinabalu Sabah, Malaysia aut NATIONALLICENCE 700 1- Lee Sun-Kyu School of Mechatronics, Gwangju Institute of Science and Technology, 1 Oryong-dong, Buk-gu, 500-712, Gwangju, The republic of South Korea aut NATIONALLICENCE 773 0- International Journal of Precision Engineering and Manufacturing Springer Berlin Heidelberg 14/7(2013-07-01), 1169-1175 2234-7593 14:7<1169 2013 14 12541 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer