Excavator Controller Body Swing Reduction via Surface Roughness Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional excavators experience excessive swinging and potential damage when traveling on rough terrain, leading to instability and increased risk of load drops during operation.
Innovation Solution
An excavator system that includes a controller determining the roughness of the traveling surface using acceleration sensors, which then controls the hydraulic motor to limit speed and transmit surface information to a management device for further speed adjustments, thereby reducing body swing and improving stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the excavator travels on rough ground at high speed, then productivity is improved, but the body swings and damages the body
Solution Approach 1:
The system uses acceleration sensors to detect body swing magnitude and provides feedback to the controller. The controller adjusts the hydraulic motor speed based on this feedback, reducing speed when swing is detected and restoring it when swing subsides, thereby maintaining stability while preserving productivity
Solution Approach 2:
The system dynamically adjusts the traveling speed of the hydraulic motor based on real-time detection of body swing conditions. Rather than maintaining a fixed speed, the control system modifies speed parameters adaptively in response to changing ground conditions and body stability states
2Productivity
If the excavator travels on rough ground at high speed, then productivity is improved, but loads are dropped by the swing of the body
Solution Approach 1:
The acceleration sensors detect body swing that could lead to load dropping and provide feedback to the controller. The controller responds by adjusting hydraulic motor speed to minimize swing magnitude, preventing the harmful effect of load dropping while maintaining efficient travel when conditions permit
3Reliability
If the controller limits speed on rough ground, then body swing is reduced, but productivity decreases
Solution Approach 1:
The system implements periodic monitoring of body swing through acceleration sensors and applies intermittent speed adjustments. Rather than continuously limiting speed, the controller periodically assesses swing conditions and adjusts speed only when necessary, maintaining productivity during stable periods while ensuring stability when swing is detected
Solution Approach 2:
The traveling speed is dynamically adjusted based on real-time body stability conditions. The system transitions between different speed states (limited and unrestricted) according to the detected swing magnitude, optimizing the balance between stability and productivity rather than applying a static speed limit
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 effectively reduces body swing and enhances operator comfort and equipment durability by adjusting speed based on surface conditions, minimizing structural damage and operator fatigue.
Implementation Method 1
determines a state of the traveling surface on which the excavator travels, based on change in acceleration detected by an acceleration sensor of itself
Data Source
AI summary
An excavator includes a controller including a memory and a processor configured to determine roughness of a traveling surface, wherein the controller controls a hydraulic motor for traveling according to a result of determination of the roughness.