Work Vehicle Motor Control for Straight Travel Accuracy
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Solution Overview
Problem
Unintentional turning power generated when straight-travel power is input to a turning power transmission path in a work vehicle, hindering straight travel.
Innovation Solution
A work vehicle configuration that includes a straight-travel electric motor and a turning electric motor, with the turning electric motor's rotational speed being controlled to return to a target speed during straight travel to prevent unintended turning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the work vehicle uses both a straight-travel electric motor and a turning electric motor with coupled transmission paths, then the vehicle achieves improved maneuverability and turning capability, but straight-travel power unintentionally inputs to the turning power transmission path causing unwanted turning and degrading straight travel accuracy
Solution Approach 1:
The control device monitors the rotational speed of the turning electric motor during straight travel and provides feedback control. When the rotational speed deviates from the target rotational speed (which is typically zero during straight travel), the control device adjusts the turning electric motor's operation to return it to the target speed, thereby eliminating unwanted turning and ensuring accurate straight travel while maintaining the ability to turn when needed
Data Source
AI summary
The work vehicle includes a straight-travel electric motor that generates the straight-travel power and a turning electric motor that generates turning power. The during straight travel by driving the straight-travel electric motor, when differing from a target rotational speed of the turning electric motor, a rotational speed of the turning electric motor returns to a target rotational speed of the turning electric motor.