[3] CHOI S B,LEE D H.Modal analysis and control of a bowl parts feeder activated by piezoceramic actuators[J].Journal of Sound and Vibration,2004,275:452-458
[4] MRACEK M,WALLASCHEK J.A system for powder transport based on piezoelectrically excited ultrasonic progressive waves[J].Materials Chemistry and Physics,2005,90:378-380
[5] NOBUHIRO K,YOSHIRO T,TAKEHIRO T.Powder-feeding device using hollow cylindrical piezoelectric ceramics[J].Japanese Journal of Applied Physics,1993,32:2405-2407