Construction Machine Control for Design Surface Following
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Solution Overview
Problem
Construction machines face difficulties in maintaining the working equipment above the design surface, especially when dealing with varied site conditions and multiple construction tasks, leading to challenges in following complex design shapes.
Innovation Solution
A control system for construction machines that includes a target value generation unit, a prediction unit, and a command unit, utilizing model predictive control to calculate and output control commands for the working equipment, ensuring it follows the design surface by adjusting translational and rotational speeds based on real-time data and prediction models.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the working equipment is controlled to follow the design surface, then the manufacturing precision is improved, but the adaptability to various site conditions deteriorates
Solution Approach 1:
The control system dynamically adjusts control parameters based on real-time feedback from sensors and prediction model outputs. The prediction model continuously updates expected positions and compares them with actual positions, allowing the system to adapt to varying site conditions while maintaining following accuracy. This dynamic adjustment mechanism enables the system to handle both simple and complex design surfaces across different construction scenarios.
2Manufacturing precision
If the working equipment is controlled to follow complex design surfaces, then the manufacturing precision is improved, but the device complexity increases
Solution Approach 1:
The control system incorporates a prediction model that generates expected position values based on current control inputs and system state. These predicted values are fed back to compare with actual sensor measurements, creating a closed-loop control system. This feedback mechanism enables precise following of complex design surfaces by continuously correcting deviations without requiring overly complex control architecture.
3Productivity
If the working equipment moves quickly to maintain productivity, then the productivity is improved, but the manufacturing precision deteriorates
Solution Approach 1:
The prediction model performs preliminary calculations of expected equipment positions based on current control commands and system state. By predicting future positions and comparing them with target design surface positions in advance, the system can proactively adjust control inputs to maintain both speed and accuracy. This allows the working equipment to move efficiently while staying on track with the design surface.
Data Source
AI summary
A control system for a construction machine includes a target value generation unit configured to generate a target value of an amount of control of working equipment, a prediction unit configured to calculate a predicted value of the amount of control of the working equipment based on the target value and a prediction model for the working equipment, and calculate an amount of drive to control the working equipment based on the predicted value, and a command unit configured to output a control command for control of the working equipment based on the amount of drive.