Motor Grader Steering Control with Directional Correction Input
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Solution Overview
Problem
Automated steering systems for work machines like motor graders face challenges in making fine course adjustments due to detection errors or operator preferences, requiring easy and precise control to maintain straight movement despite potential wobbling from biased blade loads.
Innovation Solution
A steering control system with a directional correction input device and controller that allows operators to adjust the direction of travel by a certain angle laterally, enabling fine course corrections through a steering mechanism, either manually or automatically, using a combination of sensors and satellite positioning systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If automated steering control is used to maintain straight forward movement, then the machine's stability is improved, but the ability to make fine course adjustments is reduced
Solution Approach 1:
A directional correction input device is introduced as an intermediary between the operator and the automated steering control system. This device allows the operator to input fine course adjustment commands without disabling the automated steering, thereby mediating between the need for stability and the need for adjustability
Solution Approach 2:
The steering control system is made dynamic by allowing it to switch between automated control mode and manual correction mode. The controller dynamically integrates commands from both the automated steering control and the directional correction input device, enabling the system to adapt its control characteristics based on operational needs
2Measurement precision
If satellite positioning systems are used for automated steering, then positioning accuracy is improved, but system complexity and cost increase
Solution Approach 1:
The directional correction input device serves as an intermediary that enables fine course adjustments without requiring complex satellite positioning systems. For minor course corrections, the simple input device suffices, reserving the more complex satellite positioning for situations requiring absolute position accuracy
Solution Approach 2:
The system changes the parameter of control precision based on the situation. For fine course adjustments, a coarser control mechanism (directional correction input device) is used, while satellite positioning is reserved for situations requiring high precision positioning, thereby optimizing the balance between accuracy and complexity
Data Source
AI summary
A steering mechanism is used to navigate the direction of travel of a motor grader. A directional correction input device is manipulatable by an operator. A controller, during automatic control of the steering operation by the steering mechanism, controls the steering mechanism in a manner that the direction of travel is adjustable leftward or rightward through a certain angle based on an operation command inputted through the directional correction input device.