“…The objective of the R&D program on dynamic stability of maglev systems at Argonne National Laboratory (ANL) since 1991 (Coffey et al, 1991;Chen et al, , 1993Cai et al, 1992aCai et al, , 1992bCai et al, , 1992cCai et al, , 1993aCai et al, , 1993b, 1995a; He et al, Zhu et al, 1994) has been to develop a general approach to investigating and predicting the occurrence of instabilities in maglev suspension systems and to provide a better understanding of the conditions (design features and parameter values) that can lead to dynamic instabilities.…”