Tsai M.-S.Yuan W.-H.Huang H.-W.Liu C.-C.Wang F.C.2019-07-042019-07-0420139.78161E+12https://www.scopus.com/inward/record.uri?eid=2-s2.0-84945197498&partnerID=40&md5=bc9c477e4819fdf42d39d164e8fc6378https://scholars.lib.ntu.edu.tw/handle/123456789/412683Monitoring of friction condition using a system identification techniqueconference paper2-s2.0-84945197498