Bucket Shake Control Using Articulation Angle Feedback
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Solution Overview
Problem
In work machines, performing bucket shake operations while the vehicular body is in an unstable state can increase the load applied to the body, leading to potential resonance and instability.
Innovation Solution
A control system for a work machine that includes a rear frame, a bendable front frame, a bucket, an actuator, and a sensor-controlled controller to manage the bucket shake operation based on the detected relative position between the frames, limiting the bucket's movement to reduce resonance and load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If bucket shake operation is performed to remove adhering matter from the bucket, then productivity is improved, but the load on the vehicular body increases and stability deteriorates
Solution Approach 1:
The control system dynamically adjusts the bucket shake operation parameters based on the detected articulation angle. When the articulation angle exceeds the threshold, the system automatically limits or prohibits bucket shake operations, and when the angle is within acceptable range, normal bucket shake operations are permitted. This dynamic control strategy resolves the contradiction by adapting the productivity-enhancing operation to the current stability conditions of the vehicular body.
Solution Approach 2:
The system employs a feedback mechanism where the sensor continuously detects the articulation angle between the rear and front frames, and this information is fed back to the controller. The controller uses this feedback to make real-time decisions about permitting or limiting bucket shake operations. This closed-loop feedback control ensures that productivity operations are performed only when they will not compromise vehicular body stability.
2Productivity
If bucket shake operation is performed quickly to remove adhering matter, then productivity is improved, but resonance occurs increasing the load on the vehicular body
Solution Approach 1:
The control system takes preliminary anti-action by detecting the articulation angle before permitting bucket shake operations. When the articulation angle indicates an unstable state, the system proactively limits or prohibits bucket shake operations before resonance can occur. This preventive approach eliminates the harmful resonance effect before it can develop, rather than attempting to mitigate it after the fact.
Solution Approach 2:
The system dynamically controls the bucket shake operation based on real-time articulation angle detection. By adjusting the operability of the bucket shake function according to the current articulation angle, the system ensures that bucket shake operations are performed only under stable conditions, thereby preventing resonance while maintaining productivity when possible.
Data Source
AI summary
Provided are a control system and a control method for a work machine, by which a bucket shake operation can be performed and a load applied to a vehicular body can be reduced. The control system for a work machine includes: a rear frame; a front frame connected to the rear frame to be bendable with respect to the rear frame; a bucket that is operable with respect to the front frame; an actuator that drives the bucket; a sensor that detects a relative position between the rear frame and the front frame; and a work implement controller that controls the actuator. The work implement controller receives an input of a result of detection by the sensor, and controls an operation of the actuator based on the result of detection by the sensor.