Shovel Controller Synchronizes Actuators for Excavation Path Accuracy
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Solution Overview
Problem
The boom and attachment of a shovel may move beyond a planned surface due to exceeding the predetermined movement speed limit during operator operation, causing the bucket's teeth to deviate from the intended excavation path.
Innovation Solution
A shovel system with a processor-controlled actuator system that synchronizes the operation of multiple actuators to ensure the attachment moves in accordance with the planned surface, using a controller to adjust the operation of the boom and arm to maintain alignment with the operator's intended path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the operator operates the shovel at high speed, then productivity is improved, but the attachment moves beyond the planned surface causing excavation precision to deteriorate
Solution Approach 1:
The control system dynamically adjusts the movement speed of the attachment based on real-time comparison between actual position and planned surface, enabling high-speed operation while maintaining precision by adapting speed limits to current operational conditions
Solution Approach 2:
The system continuously monitors the attachment's actual position and compares it with the planned surface, using this feedback to adjust actuator operations and prevent deviation beyond the planned path, resolving the contradiction between speed and precision
2Productivity
If the movement speed of the attachment is increased, then productivity is improved, but the synchronization between boom and arm operation deteriorates
Solution Approach 1:
The processor continuously monitors the operational state of multiple actuators and adjusts their operations based on feedback signals, ensuring synchronized movement even at high speeds by dynamically coordinating boom and arm operations
Solution Approach 2:
The control system dynamically coordinates the operation of multiple actuators based on real-time conditions, adapting the speed and movement patterns of each actuator to maintain proper synchronization during high-speed excavation
Data Source
AI summary
A shovel includes a lower traveling body, an upper turning body turnably mounted on the lower traveling body, an attachment attached to the upper turning body, a plurality of actuators including a first actuator and a second actuator and configured to drive the attachment and the upper turning body, and a processor configured to control an operation of the second actuator in accordance with an operation of the first actuator, wherein the processor is configured to, in response to determining that a predetermined condition on the operation of the second actuator is satisfied, control the operation of the first actuator such that the operation of the first actuator corresponds to the operation of the second actuator.