Work Vehicle Auto-Run Correction Limits for Stable Route Tracking

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Solution Overview

Problem

Conventional methods allow operators to optionally set correction amounts for positional deviations in work vehicles, leading to unstable vehicle behavior and deteriorated work accuracy when the correction is excessive.

Innovation Solution

An automatic run system that includes a run processing unit, reception processing unit, and correction processing unit, which prohibits the work vehicle's correcting action when the positional deviation exceeds a threshold value, ensuring stable operation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the operator can optionally set the correction amount, then the ease of operation is improved, but the work accuracy deteriorates when the correction amount is larger than necessary

Engineering Contradiction:

Improveoperator's ability to set correction amountVSAvoidwork accuracy

Core Design Contradiction:

Ease of operationVSManufacturing precision

Solution Approach 1:

The system changes the parameter of correction amount from being freely settable to being constrained within a predetermined range. The correction processing unit limits the correction amount to not exceed a predetermined value, thereby maintaining operator control while preventing excessive corrections that would degrade work accuracy.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If the correction amount is set optionally by the operator, then the adaptability is improved, but the stability of the work vehicle's behavior deteriorates

Engineering Contradiction:

Improveflexibility in correction settingsVSAvoidwork vehicle's behavior stability

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

The system modifies the parameter constraints by introducing a maximum correction amount threshold. The correction processing unit compares the operator-set correction amount with the predetermined limit and prohibits corrections exceeding this threshold, thereby stabilizing the work vehicle's behavior while preserving adaptive correction capabilities within safe boundaries.

Inventive Principle:

Principle #35Parameter changes

3Ease of operation

If the work vehicle performs correcting action based on operator input, then the ease of operation is improved, but the productivity deteriorates when excessive corrections are made

Engineering Contradiction:

Improveoperator control over correctionVSAvoidwork efficiency

Core Design Contradiction:

Ease of operationVSProductivity

Solution Approach 1:

The system optimizes the parameter of correction amount by establishing a predetermined maximum limit. The correction processing unit enforces this constraint to prevent excessive corrections that would reduce work efficiency, thereby maintaining operator ease of control while improving overall productivity by eliminating unnecessary correction cycles.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12493291B2Automatic run method, automatic run system, and automatic run program

Publication Date: 2025.12.09 YANMAR HLDG CO LTD

AI summary

A run processing unit causes a work vehicle to automatically run following a target route. A reception processing unit receives, from an operator, a correcting operation that corrects a positional deviation between the work vehicle and the target route, and a offset processing unit prohibits, when the positional deviation is a threshold value or over, the work vehicle correcting action that is in response to the correcting operation.