| 摘要 |
FIELD: transport.SUBSTANCE: invention relates to lifting devices. For limiting the tilt of bridge crane with induction motor drive M1, M2 crane position is defined by differential values ?and ?obtained by different readings of contactless pickups (D1, D2, D3, D4) that measure the distance from their location to rails. Crane motion direction is allowed for to generate correction signal (Uk1, Uk2) to be subtracted from speed setting signal (U3c1, U3c2) of one of supports to level the crane; magnitude of correction action is calculated from magnitudes ?and ?by the following formula: U=k×max(?, ?).EFFECT: straight motion of bridge crane.2 dwg |
