Real Time Pull-Slip Curve Modeling in Large Track-Type Tractors,申请号US201213691010-传众专利搜索

Real Time Pull-Slip Curve Modeling in Large Track-Type Tractors

申请公布号：US2014156153(A1)

申请号：US201213691010

申请日期：2012.11.30

申请公布日期：2014.06.05

申请人：

CATERPILLAR INC.

发明人：Faivre Joseph

分类号：G06F17/00

主分类号：G06F17/00

地址：Peoria IL US

摘要：A method of estimating soil conditions of a work surface during operation of a track-type tractor measures current operating conditions and current operating state to develop adjustments to a nominal pull-slip curve. The adjusted pull-slip curve is used to calculate optimum performance in terms of an input variable such as track speed. Two factors are developed to reflect soil conditions, coefficient of traction and a shear modulus adjustment that affect different portions of the nominal pull slip curve.

主权项：1. A track-type tractor adapted to characterize soil conditions during operation, the track-type tractor comprising: a slope sensor that provides a slope of the track-type tractor; a track speed sensor that provides a track speed of the track-type tractor; a processor coupled to the slope sensor and the track speed sensor; and a memory coupled to the processor, the memory storing a plurality of modules that when executed by the processor, cause the processor to: access a nominal pull-slip curve stored in the memory;store data received from the slope sensor and the track speed sensor;calculate a coefficient of traction (COT) from drawbar pull and slope at slip percentages in a first range;divide values of the nominal pull-slip curve by the COT to produce a normalized pull-slip curve;determine an optimum operating state using the COT and the slope; andprovide the optimum operating state and a current operating point to a device for use in adjusting one or more current operating conditions.