Blade Angle Control Using Acceleration Feedback in Work Vehicles
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Solution Overview
Problem
Existing work vehicles face challenges in accurately adjusting the blade propulsive angle to follow changes in direction due to variations in road surface conditions and wheel kinetic friction, making operations burdensome for operators.
Innovation Solution
The work vehicle is equipped with an acceleration sensor and a controller that adjusts the blade propulsive angle based on the sensor's output, allowing the blade to accurately follow changes in the vehicle's direction by controlling the swing circle's rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the blade propulsive angle is adjusted manually by the operator based on steering wheel operation, then the operation complexity increases for the operator, but the system structure remains simple
Solution Approach 1:
The system enables the blade propulsive angle to automatically follow the vehicle's direction changes by using the acceleration sensor to detect vehicle motion and the controller to adjust the blade angle without operator intervention. This self-adjusting mechanism eliminates the need for manual combined operations of steering wheel and work implement, significantly reducing operator burden while maintaining reasonable system complexity through automated control
Solution Approach 2:
The patent replaces the manual mechanical operation system with an automated control system that uses an acceleration sensor to detect vehicle acceleration and a controller to automatically adjust the blade propulsive angle. This substitution of mechanical manual control with sensor-based automated control reduces operator burden while introducing controlled system complexity
2Ease of operation
If the blade propulsive angle follows steering angle change based on steering wheel operation, then the operation becomes easier for the operator, but the blade propulsive angle cannot accurately follow the vehicle's actual direction of travel due to variations in wheel kinetic friction
Solution Approach 1:
The system uses an acceleration sensor to detect the vehicle's actual motion and acceleration, providing feedback to the controller. The controller then adjusts the blade propulsive angle based on this real-time feedback about the vehicle's actual direction of travel, ensuring accurate following of the vehicle's motion regardless of variations in wheel kinetic friction or road surface conditions
Solution Approach 2:
The patent replaces the steering-angle-based mechanical control system with an acceleration-based automated control system. By using the acceleration sensor to detect actual vehicle motion rather than relying on steering wheel position, the system achieves accurate tracking of the vehicle's true direction of travel while maintaining operational simplicity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system enables the blade propulsive angle to accurately follow the vehicle's direction changes, reducing operator burden and ensuring precise control during operations.
Implementation Method 1
a direction detector that detects a direction of travel of the work vehicle based on an acceleration in a direction of travel of the work vehicle
Data Source
AI summary
A work vehicle includes a vehicular body and a work implement including a blade. The vehicular body includes a controller that controls an operation of the work implement and an acceleration sensor. The controller controls a blade propulsive angle θ of the blade based on an output from the acceleration sensor.