Multi-Platform Brake Testing for Dynamic Vehicle Stability
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Solution Overview
Problem
Existing systems for checking the braking capacity of multi-axle vehicles, including composite vehicles like those with trailers, struggle to provide easily interpretable stability indices and effectively manage the complex dynamics of braking, particularly in emergency conditions, where forces between wheels and the road surface must be accurately distributed to prevent loss of control.
Innovation Solution
A multi-platform brake check system with force detection sensors on multiple pairs of platforms measures forces in three components (vertical, longitudinal, and transverse directions) to calculate the center of gravity and center of forces, providing intuitive graphical representations of stability and potential unbalance conditions, and includes specific calculations for composite vehicles to assess braking effectiveness across different axles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a multi-platform force detection system is used to measure braking forces on multi-axle vehicles, then measurement precision and reliability of braking capacity assessment are improved, but device complexity increases
Solution Approach 1:
The braking test system is divided into multiple independent force detection platforms, each equipped with its own sensors and measurement capabilities. Each platform can independently measure forces on specific axles, allowing the system to handle complex multi-axle configurations through modular segmentation rather than requiring a monolithic complex system.
Solution Approach 2:
The force detection platforms are designed with universal applicability to measure forces on various axle configurations (2-axle, 3-axle, 4-axle vehicles, and composite vehicles). The same basic platform design and measurement methodology can be applied across different vehicle types, reducing overall system complexity through standardization while maintaining measurement precision.
2Measurement precision
If force detection platforms measure forces in multiple directions (vertical, longitudinal, transverse), then stability assessment accuracy is improved, but measurement system complexity increases
Solution Approach 1:
The system combines three independent force component measurements (vertical Fz, longitudinal Fx, transverse Fy) into a unified stability assessment methodology. By integrating these measurements through the center of gravity and center of forces calculations, the system achieves comprehensive stability evaluation without requiring separate complex assessment systems for each force component.
Solution Approach 2:
The system transitions from measuring forces in three separate spatial dimensions to analyzing their combined effect in the vertical plane through the concepts of center of gravity and center of forces. This dimensional transformation simplifies the interpretation of multi-directional force data into meaningful stability indicators that are easier to assess and communicate.
3Measurement precision
If the system provides detailed force distribution data across multiple axles, then braking capacity assessment accuracy is improved, but ease of operation decreases due to data interpretation difficulty
Solution Approach 1:
The system introduces intermediate derived parameters (center of gravity position, center of forces position, stability indices) that mediate between raw force measurement data and final braking capacity assessment. These intermediate parameters serve as interpretable indicators that bridge the gap between complex multi-axle force distributions and user-friendly assessment results.
Solution Approach 2:
The system transforms raw force measurement parameters into derived stability parameters through mathematical relationships. By changing from direct force magnitude parameters to position-based parameters (centers of gravity and forces) and stability indices, the system maintains measurement precision while significantly improving data interpretability for operators.
4Adaptability or versatility
If the system includes specific calculations for composite vehicles with trailers, then adaptability to different vehicle types is improved, but device complexity and calculation complexity increase
Solution Approach 1:
The force detection and calculation system is designed with universal applicability to both rigid multi-axle vehicles and composite vehicles with trailers. The same basic measurement methodology and force integration approach work across different vehicle configurations, requiring minimal system modification while maintaining measurement accuracy and providing relevant stability assessment for each vehicle type.
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 determines dynamic behavior and stability during braking, providing users with clear indicators of potential instability or lurching effects, enabling better assessment and management of braking capacity, even in complex multi-axle configurations.
Implementation Method 1
A multi-platform brake check system with force detection sensors on multiple pairs of platforms measures forces in three components (vertical, longitudinal, and transverse directions) to calculate the center of gravity and center of forces
Data Source
Figure 1A~2
Figure 3A~3B
Figure 4A~4B
AI summary
A brake check multi-platform system and a brake checking method for a braking capacity of a vehicle with at least two wheel axles is disclosed, comprising pairs of detection platforms aligned according to a direction of movement on two parallel paths, spaced apart by a distance related to the wheelbase of a vehicle, each detection having presenting at least a resting surface configured with detection and measuring means apt to detect at least a horizontal (Fx(i), Fy(i)) and vertical (Fz(i), p(i)) component of a stress applied by the vehicle wheels to such surfaces, as well as at least a checking unit which detects the trend over time of said at least a horizontal (Fx(i), Fy(i)) and vertical (Fz(i), p(i)) component of the stress said at least a checking unit having data processing means apt to integrate in time said at least a horizontal component (Fx(i), Fy(i)) and vertical component (Fz(i), p(i) ) for each wheel of said wheel axles, wherein said checking unit is arranged to determine, during a braking action of said vehicle on said detection platforms, at least coordinates of a centre of gravity (C.G.) in dynamic conditions, thus defined: xb=∑xi*pi/∑pi,yb=∑yi*pi/∑pi where x(i) and y(i) are the coordinates x and y, respectively, on a resting plane of the ith wheel and p(i) is the vertical component (Fz(i)) of the stress detected for said ith wheel, and coordinates of a centre of the braking forces (C.F.) in dynamic conditions, thus defined: xf=∑xi*fi/∑fi, yf=∑yi*fi/∑fi, and determine a risk condition warning proportional to a relationship between the positions of said centre of gravity (C.G.) and said centre of the braking forces (C.F.).