Work Vehicle Bucket Shaking Control System
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Solution Overview
Problem
Existing systems for controlling bucket movement in earth-moving machines, such as wheel loaders, fail to differentiate between smooth and hard shaking operations, using a fixed amplitude signal for both metering and cleaning tasks, which affects comfort and precision.
Innovation Solution
A control system that uses a joystick to detect the frequency and position of the bucket relative to the boom, generating alternate control signals with variable amplitudes based on the detected angles for metering and cleaning operations, allowing for optimized bucket movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed amplitude control signal is used for bucket shaking, then the system is simple to implement, but the precision and comfort during different operations (metering vs cleaning) deteriorate
Solution Approach 1:
The control signal amplitude is made dynamic rather than fixed. The system continuously adjusts the amplitude of the control signal based on the detected bucket position angle, transitioning from a static parameter to a variable one that adapts to different operational requirements (metering vs cleaning modes).
Solution Approach 2:
The system changes the parameter of control signal amplitude based on the bucket position angle detected by the sensor. By mapping angle ranges to different amplitude levels, the system achieves precise control for different operations without increasing overall system complexity.
2Device complexity
If a fixed amplitude control signal is used for bucket shaking, then the control system is simple, but the energy consumption and operational efficiency deteriorate
Solution Approach 1:
The control system dynamically adjusts the amplitude of the control signal based on real-time bucket position detection. This dynamic adjustment ensures that only the necessary energy is consumed for the current operational requirement, avoiding wasteful energy usage that would occur with a fixed high-amplitude signal.
Solution Approach 2:
The system changes the energy parameter (control signal amplitude) according to the detected bucket angle and operational mode. By reducing amplitude for metering operations and increasing it only for cleaning operations, the system optimizes energy consumption while maintaining simplicity.
3Ease of operation
If a fixed amplitude control signal is used, then the system is easy to operate, but the adaptability to different operations (metering and cleaning) deteriorates
Solution Approach 1:
The system performs self-adjustment based on the detected bucket position. The control unit automatically selects the appropriate amplitude level without requiring manual intervention from the operator, maintaining ease of operation while achieving high adaptability to different tasks.
Solution Approach 2:
The control signal amplitude parameter is automatically changed based on the bucket angle detected by the sensor. This automatic parameter adaptation allows the system to handle both metering and cleaning operations with a single unified control interface, preserving ease of operation while enhancing versatility.
Data Source
Figure 1
Figure 2~4
AI summary
Work vehicle (2) comprising a bucket (3) carried by a boom (4), and a control system (1) for controlling a shaking movement of the bucket (3), the control system (1) comprising a valve arrangement (11), a bucket actuator (6), an electronic control unit (16) and a joystick (15), the electronic control unit (16) comprising elaboration means configured to retrieve data related to a joystick alternate movement, elaborate this latter and provide consequently an alternate control signal (Q', Q") towards the valve arrangement (11); the control system comprising sensor means (17) configured to detect a position (γ', γ") of the bucket (3) with respect to the boom (4), the electronic control unit (16) being electrically connected to the sensor means (17), the elaboration means being configured to retrieve data from sensor means (17) and vary the amplitude of the alternate control signal (Q', Q") as a function of the retrieved position (γ', γ").