VIBRATION CONTROL SYSTEMS AND METHODS FOR INDUSTRIAL LIFT TRUCKS

摘要

A lift truck includes systems and methods for improved vibration control. A corrective yaw input mechanism reduces or eliminates torsional vibration motion of the lift truck about the Z-axis. Some embodiments may include, alone or in combination, drive wheel control and load wheel control.

主权项

1. A system for mitigating torsional vibrations about a Z-axis of a lift truck, the system comprising:
a tractor unit; a mast mounted relative to the tractor unit, the mast including a fixed base and a vertically extendable mast section; a vertically movable platform attached to the extendable mast section, the platform being vertically movable with the extendable mast section between an upper position and a lower position; a first sensor at or near a top of the mast, the first sensor to measure yaw about the Z-axis at or near the top of the mast; a corrective yaw input mechanism, the corrective yaw input mechanism to induce a counter moment at or near the fixed base when the measured yaw about the Z-axis at or near the top of the mast exceeds a predetermined value, the induced counter moment to damp the measured yaw about the Z-axis at or near the top of the mast.