Work Machine Attachment Path Correction for Position Shifts
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Solution Overview
Problem
Existing automatic operation systems for work machines lack the capability to appropriately reset the work plan when the work position of the tip attachment shifts, particularly in terms of setting the target path for the tip attachment between the work position and a different position such as the earth removal position.
Innovation Solution
An automatic operation system that includes a machine body, an attachment, and a controller. The controller comprises a target path setting part, an automatic operation part, a work position shifting part, and a target path correction part. This system allows for the automatic operation of a work machine by setting a target path for the tip attachment, shifting the work position based on the advancement of the series of motions, and correcting the target path in response to shifts in the work position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the work position is shifted in accordance with the advance of the series of motions, then the productivity is improved by enabling continuous operation, but the target path requires correction to maintain manufacturing precision
Solution Approach 1:
The system implements feedback by continuously monitoring the work position shifts and automatically correcting the target path based on the actual position deviations. The controller compares the intended target path with the actual position after each cycle and adjusts subsequent target paths to compensate for accumulated deviations, thereby maintaining precision while enabling continuous operation.
Solution Approach 2:
The target path is made dynamic rather than static. Instead of using a fixed target path for all cycles, the system dynamically adjusts the target path for each subsequent cycle based on the work position shifts observed in previous cycles. This allows the system to adapt to position changes while maintaining operational continuity.
2Manufacturing precision
If the target path is corrected in accordance with the shift of the work position, then the manufacturing precision is maintained, but the device complexity increases due to additional correction mechanisms
Solution Approach 1:
The controller is designed to perform multiple functions: it manages the series of motions execution, monitors work position shifts, calculates position deviations, and corrects target paths. By consolidating these functions into a single multi-functional controller rather than separate dedicated devices for each function, the system achieves the required precision without proportionally increasing overall device complexity.
Solution Approach 2:
The system performs self-correction of the target path using its own monitoring and calculation capabilities. The controller automatically detects work position shifts and generates correction amounts without requiring external intervention or additional complex correction mechanisms, enabling the system to maintain precision through self-service operations.
Data Source
AI summary
A system including an automatic operation part, a work position shifting part and a target path correction part. The automatic operation part performs a control of making the attachment perform a series of motions including a motion of moving a control target position along a target path over a plurality of cycles, through an automatic operation. The work position shifting part shifts the work position in at least one of an up-down direction and a front-rear direction of the attachment in accordance with the advance of the series of motions over the plurality of cycles. The target path correction part corrects a portion of the target path between a path end position and the work position in accordance with the shift of the work position by the work position shifting part.