Ground Milling Machine Frame Lift Control on Uneven Terrain
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Solution Overview
Problem
Operators of ground milling machines face challenges in maintaining the correct height and orientation of the machine frame relative to the ground surface, particularly when navigating uneven terrain, which can lead to reduced operating comfort and increased risk of tipping.
Innovation Solution
A method that uses longitudinal inclination sensors to detect and adjust the lift position of the machine frame relative to a plumb-line direction, allowing for automatic or semi-automatic control of the lifting means to maintain a target inclination, independent of the ground surface conditions, while prioritizing longitudinal inclination control over levelling adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all movement means are height-adjustable relative to the machine frame, then the machine can adapt to different ground conditions and maintain stability, but the operator's workload increases significantly as they must simultaneously monitor multiple functions
Solution Approach 1:
The control device automatically monitors and adjusts the height position of movement means without requiring continuous operator intervention. The system uses sensors to detect ground conditions and autonomously controls the lifting means to maintain machine frame stability, allowing the machine to regulate itself
Solution Approach 2:
The control device continuously receives feedback from sensors monitoring the height position of movement means and ground conditions, then automatically adjusts the lifting means accordingly. This closed-loop control system maintains stability while reducing the need for constant operator monitoring
2Measurement precision
If the operator manually monitors and adjusts the height position of movement means, then precise control is possible, but the operator cannot effectively monitor other functions such as the milling process and loading
Solution Approach 1:
The control device autonomously manages height position monitoring and adjustment, freeing the operator to focus on milling and loading functions. The system independently maintains precise height control through automated sensor feedback and actuator regulation
Solution Approach 2:
The control device acts as an intermediary between the sensors monitoring height position and the lifting means actuators. It processes sensor data and automatically commands appropriate adjustments, eliminating the need for direct operator intervention while maintaining precise control
3Adaptability or versatility
If the machine frame inclination is adjusted to follow uneven ground surface, then the machine adapts to terrain variations, but the longitudinal inclination relative to plumb-line direction changes, potentially causing tipping
Solution Approach 1:
The system uses individual height-adjustable movement means at each corner of the machine frame, allowing independent adjustment of each support point. This enables the machine to adapt to uneven terrain by raising or lowering specific corners while maintaining overall longitudinal levelness through coordinated control
Solution Approach 2:
The control device dynamically adjusts the height position of movement means based on real-time sensor feedback about ground conditions and machine inclination. It continuously modifies lifting cylinder extensions to maintain the machine frame's longitudinal inclination within safe limits while adapting to terrain variations
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
This method enhances operating comfort by reducing operator workload and improving stability by maintaining consistent longitudinal inclination, even on uneven terrain, thereby preventing tipping and ensuring efficient milling operations.
Implementation Method 1
detecting and monitoring an actual longitudinal inclination of the machine frame (2) relative to a plumb-line direction using at least one longitudinal inclination sensor
Data Source
AI summary
A method for setting the lifting position of a machine frame of a ground milling machine, which machine frame is connected via lifting means to movement means, and to a ground milling machine.