Handling Machine Control for Overturning Prevention
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Solution Overview
Problem
Existing handling machines face challenges in maintaining stability due to unpredictable inertial forces during operation, particularly when traveling on uneven terrain, slopes, or when braking with a load, as current solutions either limit speed permanently or require inaccurate speed adjustments to prevent overturning.
Innovation Solution
A handling machine equipped with an overturning moment indicating sensor and a control unit that allows operators to select between enhanced and simple operating modes, where the enhanced mode considers speed limits based on measured inertial forces to prevent movements that could lead to instability, while the simple mode focuses solely on preventing movements when an overturning threshold is crossed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If permanent speed limitation is imposed to control inertial forces and prevent overturning, then stability is improved, but productivity and operational efficiency deteriorate
Solution Approach 1:
The patent implements dynamic speed control that adapts to real-time operating conditions. The control unit continuously monitors the stability indicator and adjusts the maximum permissible speed dynamically, allowing higher speeds when stability is sufficient and reducing speed only when necessary to prevent overturning. This resolves the contradiction by replacing permanent limitation with conditional, adaptive limitation.
Solution Approach 2:
The system changes the parameter of speed limitation from a fixed permanent value to a variable value that depends on the stability indicator reading. The control unit modifies the maximum speed parameter based on real-time measurements of the stability indicator, enabling the system to optimize both stability and productivity by adjusting speed parameters to actual operating conditions.
2Stability of the object's composition
If automatic correction measures are implemented to control and modify handling arm movement in emergencies, then stability is improved, but device complexity increases
Solution Approach 1:
The patent employs a feedback mechanism where the stability indicator continuously monitors the machine's stability state and provides real-time information to the control unit. The control unit uses this feedback to automatically adjust speed limitations and control handling arm movements, preventing overturning without requiring complex emergency correction systems. The feedback loop simplifies control by using direct stability information.
3Stability of the object's composition
If speed of handling arm movement is restricted to limit inertial forces, then stability is improved, but ease of operation deteriorates
Solution Approach 1:
The system dynamically adjusts speed restrictions based on real-time stability conditions. When the stability indicator shows good stability, the system allows higher speeds for ease of operation. When stability deteriorates, the system automatically reduces speed to prevent overturning. This dynamic approach maintains ease of operation under normal conditions while ensuring safety when needed.
Solution Approach 2:
The control system performs self-regulation by automatically monitoring stability through the stability indicator and adjusting speed limitations without operator intervention. The system serves itself by detecting instability conditions and applying appropriate speed restrictions autonomously, reducing the burden on the operator while maintaining stability.
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 solution allows for stable operation without permanent speed limitations, enabling operators to control the handling arm effectively while preventing movements that could cause the machine to overturn, thus enhancing operational efficiency and safety.
Implementation Method 1
an overturning moment indicating sensor sensitive to a quantity indicating an overturning moment applied to the main body relative to an overturning axis
Data Source
AI summary
The invention relates to a control method for controlling an actuating device (8) in a handling machine (1) comprising a main movable body (2) and a handling arm (6) intended to receive a load that is to be moved, the actuating device being configured to perform a movement of the handling arm in relation to the main body, the method comprising: measuring a parameter indicative of a tilting force applied to the main body in relation to a tilting axis, and stopping or hindering a movement of the handling arm performed or requested when a stopping condition is met, the stopping condition being dependent on the parameter indicative of the measured tilting force, and, in which, when a reinforced operating mode is selected, the stopping condition is also dependent on a parameter representative of the speed of the movement of the handling arm.