| 摘要 |
A steering system ( 10 ) for a vehicle, such as a gantry crane ( 12 ). The gantry crane ( 12 ) generally includes a support structure ( 14 ) having a first front wheel ( 32 ) and a second opposing front wheel ( 36 ) connected proximate a front portion of the crane ( 12 ), and a first rear wheel ( 30 ) and a second opposing rear wheel ( 34 ) connected proximate a rear portion of the crane ( 12 ). A control system connected to the crane includes a user interface ( 111 ) electronically coupled to a command potentiometer ( 114 ) and a programmable controller responsive to the command potentiometer for controlling the angular position of each of the first front wheel ( 32 ), the second front wheel ( 36 ), the first rear wheel ( 30 ) and the second rear wheel ( 34 ) to effect a steering mode selected through the user interface ( 111 ).
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