Patent ID: 7849955
Filing Date: 2010-12-14
Classification: B60W,B66F

Abstract:
1. A materials handling vehicle comprising: a frame comprising an operator's compartment; wheels supported on said frame, at least one of said wheels being a steerable wheel; a steer-by-wire system associated with said steerable wheel to effect angular movement of said steerable wheel about a first axis, said steer-by-wire system comprising: control apparatus coupled to said control handle to receive said steer control signal, coupled to said steer motor to generate a first drive signal to said steer motor in response to said steer control signal from said control handle to effect angular movement of said steerable wheel about the first axis, and coupled to said tactile feedback device to generate said tactile feedback device signal; and wherein said control apparatus varies said tactile feedback device signal in a step-wise manner as a function of an error between a desired angular position of said steerable wheel defined by said steer control signal and a determined actual position of said steerable wheel.