Materials handling vehicle having a control apparatus for determining an acceleration value

摘要

A materials handling vehicle is provided comprising: a frame; wheels supported on the frame; a traction motor coupled to one of the wheels to effect rotation of the one wheel; a speed control element operable by an operator to define a speed control signal corresponding to a desired speed of the traction motor; a system associated with a steerable wheel to effect angular movement of the steerable wheel; and control apparatus coupled to the speed control element to receive the speed control signal, and coupled to the traction motor to generate a drive signal to the traction motor in response to the speed control signal to control the operation of the traction motor. The control apparatus may determine an acceleration value for the traction motor based on at least one of an angular position of the steerable wheel, a speed of the traction motor and a current position of the speed control element as defined by the speed control signal.

主权项

1. A materials handling vehicle comprising:
a frame comprising an operator's compartment; wheels supported on said frame; a traction motor coupled to one of said wheels to effect rotation of said one wheel; a system associated with a steerable wheel to effect angular movement of said steerable wheel about a first axis, said system comprising a control handle capable of being moved by an operator to define a current desired angular position of said steerable wheel; control apparatus varying a drive signal to said traction motor based on a steerable wheel error; wherein said steerable wheel error is determined by comparing said current desired angular position of said steerable wheel to a current calculated actual position of said steerable wheel.