Excavator Attachment Control With Dynamic Master Element Selection
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Solution Overview
Problem
Conventional excavators require different operating techniques when using machine control and manual operation, leading to operator stress due to the need for adjusting bucket teeth speed relative to the design surface based on distance.
Innovation Solution
An excavator system that includes a controller selecting a master and slave element among moving elements based on operation details, utilizing a machine control function to reduce operator stress by standardizing the operation across different modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If machine control function is used to automatically adjust bucket teeth speed relative to design surface, then manufacturing precision is improved, but device complexity increases due to multiple operating modes
Solution Approach 1:
Instead of having the operator control multiple elements independently, the system inverts the control logic by automatically determining the master element and controlling other elements relative to it. This reduces the cognitive load on the operator while maintaining precision.
Solution Approach 2:
The control system performs self-service by automatically identifying the master element and calculating the control relationships among moving elements without requiring manual configuration by the operator, thereby simplifying the operating interface.
2Manufacturing precision
If different operating techniques are required for machine control and manual operation, then manufacturing precision is improved through automated control, but ease of operation deteriorates due to operator stress
Solution Approach 1:
The control system achieves universality by using a single master element control approach that works for both machine control and manual operation modes. The same control logic applies regardless of the operating mode, eliminating the need for operators to learn different techniques.
Solution Approach 2:
The system dynamically changes control parameters by automatically adjusting which element serves as the master element based on the current operation state, allowing the control system to adapt to different scenarios while maintaining a consistent control interface.
3Ease of operation
If master element and slave element are automatically selected based on operation details, then ease of operation is improved by standardizing control, but device complexity increases due to automatic selection logic
Solution Approach 1:
The controller performs self-service by automatically determining the master element based on operation details without requiring external input or manual configuration. This automated selection process simplifies the operator's task while the complexity is contained within the controller's internal logic.
Solution Approach 2:
The system uses feedback from operation details to dynamically adjust the master element selection. The controller continuously monitors operation state and adjusts the control relationship accordingly, creating a closed-loop system that adapts to changing conditions.
Data Source
AI summary
An excavator includes a controller that selects, in a machine control function, a master element and a slave element among a plurality of moving elements constituting an attachment, based on a plurality of information representing details of operations for the plurality of moving elements.