Steering Correction for Mobile Machines
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Solution Overview
Problem
Existing steering systems for mobile machines, such as tractors and excavators, struggle to maintain a straight path due to external and internal disturbances, such as uneven terrain, track tensions, and hydraulic inefficiencies, especially in manual operation.
Innovation Solution
A method and system for steering correction in mobile machines, which includes detecting a steering request, determining if the request is for straight-line travel, monitoring deviations from the straight path using orientation sensors, and generating adjusted steering commands to correct deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual steering control is used, then operator flexibility is maintained, but the machine deviates from straight path due to disturbances
Solution Approach 1:
The system continuously monitors the machine's actual orientation using sensors and compares it to the desired straight path, then automatically applies steering corrections based on the detected deviation. This closed-loop feedback mechanism maintains straight path accuracy while allowing manual operation to continue.
Solution Approach 2:
An electronic control unit acts as an intermediary between the operator's steering inputs and the machine's actual steering response. The ECU processes the steering commands and adds automatic correction components to counteract disturbances, effectively mediating between manual control and path accuracy requirements.
2Manufacturing precision
If autonomous steering systems are implemented, then straight path accuracy is improved, but the system cannot correct steering in manually-operated machines
Solution Approach 1:
The system dynamically adapts its level of intervention based on operator input. It can operate in purely manual mode, provide supplemental assistance, or function more autonomously depending on the situation, allowing it to work effectively with manually-operated machines while maintaining path accuracy when needed.
Solution Approach 2:
The steering correction system is designed to work across multiple operational modes and machine types. It can provide straight-line steering assistance for manually-operated machines while also supporting autonomous operation, making it universally applicable to different operating scenarios.
3Manufacturing precision
If steering correction is continuously applied, then straight path maintenance is improved, but operator workload increases
Solution Approach 1:
The system performs self-correction by automatically detecting deviations and applying steering adjustments without requiring operator intervention. The machine essentially corrects its own steering errors, reducing the workload on the operator while maintaining path accuracy.
Solution Approach 2:
The system applies only the necessary amount of steering correction to maintain the straight path, avoiding excessive intervention. It monitors and corrects only the deviation component, leaving normal steering operations to the operator, thus providing just enough assistance without overwhelming the operator.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively maintains a straight path for mobile machines by continuously monitoring and correcting deviations caused by external and internal disturbances, enhancing operational efficiency and reducing operator workload.
Implementation Method 1
determining, based on a signal from an orientation sensor, a deviation from the straight direction
Data Source
AI summary
A method for steering correction in a mobile machine having at least one ground-engaging device including one or more tracks or one or more wheels includes detecting a steering request with an electronic control unit, the steering request being generated by an input device configured to control steering of the mobile machine. The method also includes determining that the steering request is a request to propel the mobile machine in a straight path and determining, during travel of the machine, an amount of deviation of the mobile machine from the straight path. The method further includes generating an adjusted steering command based on the amount of deviation from the straight path.