Autonomous Braking Adaptation to Road Friction
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Solution Overview
Problem
Existing autonomous braking systems for motor vehicles lack reliability due to insufficient consideration of road surface conditions, which can lead to inadequate braking performance and safety issues.
Innovation Solution
An autonomous braking system that determines and considers road surface parameters, such as frictional coefficients, to dynamically set braking criteria and parameters, allowing for adaptive braking based on current road conditions, including weather and driving dynamics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If autonomous braking is performed without considering road surface conditions, then the braking system is simpler to operate, but the reliability and safety of braking is reduced
Solution Approach 1:
The system performs preliminary detection and determination of road surface parameters (such as friction coefficients) before executing the braking operation. This allows the braking control to be adapted in advance to the actual road conditions, improving reliability without adding complex real-time adjustments during braking
Solution Approach 2:
The system incorporates feedback mechanisms where sensor data about road surface conditions is continuously monitored and used to adjust braking parameters. The control unit receives information about road surface state and feeds this back into the braking decision-making process, enabling adaptive braking that responds to actual conditions
2Reliability
If braking is initiated earlier on slippery roads to ensure safety, then the safety is improved, but the loss of time for normal driving is increased
Solution Approach 1:
The system dynamically adjusts braking parameters including the timing and intensity of braking based on real-time road surface conditions. On slippery roads, braking is initiated earlier with lower intensity, while on dry roads, braking is delayed and applied more aggressively, optimizing both safety and driving efficiency for each condition
Solution Approach 2:
The control unit changes braking parameters (such as braking force, duration, and initiation timing) based on determined road surface parameters. This allows the system to optimize braking performance for different road conditions, ensuring safety on slippery surfaces while minimizing time loss on high-grip roads
Data Source
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AI summary
The invention relates to a method for autonomously braking a motor vehicle (1) by means of an autonomous braking system (2) of the vehicle (1), comprising the step of detecting an obstacle (5) present in a surrounding area (6) of the vehicle (1) by means of a sensor device (7) of the vehicle (1), and the step of autonomously braking the vehicle (1) by means of the autonomous braking system (2) upon a braking criterion in respect of a distance (9) between the obstacle (5) and the vehicle (1) being fulfilled, wherein at least one braking parameter is set for the autonomous braking. A road surface parameter (µ) describing a road surface condition is determined and considered by the autonomous braking system (2) for the autonomous braking. The invention also relates to an autonomous braking system (2) for autonomously braking a vehicle (1).