Excavator Boom Control for Land Leveling
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Solution Overview
Problem
Existing construction machines, such as hydraulic excavators, lack effective control systems for performing land leveling work efficiently, particularly in adjusting the movement of the work device to achieve various target land leveling angles.
Innovation Solution
A drive control device that includes a controller capable of setting a target land leveling angle, calculating the pivoting member gravity center velocity, determining a target velocity for the composite center of gravity of the work device, and adjusting the movement of the boom to align the actual velocity of the composite center of gravity with the target velocity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the operator manually controls the work device to perform land leveling work, then the operator can adjust the movement based on experience, but it becomes difficult for unskilled workers and requires high operating skill
Solution Approach 1:
The control device calculates the actual land leveling angle in real-time based on boom and arm movement data, compares it with the target angle, and automatically adjusts the boom movement to correct deviations. This feedback mechanism enables unskilled operators to achieve precise land leveling without requiring manual control expertise.
Solution Approach 2:
The system automatically calculates the required boom movement amount based on the deviation between actual and target land leveling angles, and executes the correction without operator intervention. The work device self-adjusts to maintain the correct angle, eliminating the need for skilled manual operation.
2Manufacturing precision
If the work device moves without coordinated control, then the operator has flexibility in operation, but the movement is not balanced and the construction surface cannot be leveled to the target angle
Solution Approach 1:
The control device continuously monitors the actual land leveling angle by calculating positions from sensor data on boom and arm movements. It compares this actual angle with the target angle and automatically adjusts the boom movement to eliminate deviations, ensuring precise land leveling to the target angle.
Solution Approach 2:
The system replaces complex manual coordination of multiple hydraulic cylinders with an automated control algorithm. The controller calculates the required boom movement amount based on the angle deviation and executes it automatically, substituting mechanical operator skill with computational control logic.
3Productivity
If the operator performs excavation work repeatedly, then the work can be completed, but the operator burden increases
Solution Approach 1:
The control device automatically calculates and executes the required boom movement amount to maintain the correct land leveling angle during repeated excavation operations. This self-adjusting capability reduces operator burden by eliminating the need for continuous manual correction during repetitive tasks.
Solution Approach 2:
The system provides real-time feedback on the land leveling angle and automatically corrects deviations during excavation operations. This ensures consistent work quality across repeated operations without increasing operator burden, as the automated system handles the precision requirements.
Data Source
AI summary
A drive control device for a construction machine includes a controller that controls the movement of a work device. The controller sets a target land leveling angle, which is a target for a land leveling angle in land leveling work performed by the work device, calculates a pivoting member gravity center velocity, which is the velocity of the center of gravity of a pivoting member, calculates a target velocity, which is a target for a velocity of the composite center of gravity of the entire work device by using the pivoting member gravity center velocity and the target land leveling angle, and controls the movement of a boom to make the actual velocity of the composite center of gravity closer to the target velocity.