Autonomous Braking Continuity After Sensor Damage
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Solution Overview
Problem
Existing driver assistance systems, such as ACC, face issues where the detection device is often damaged in collisions, leading to a loss of autonomous braking functionality, which fails to effectively dissipate kinetic energy and prevent vehicles from being pushed into each other after a rear-end collision.
Innovation Solution
A driver assistance system with a detection device that captures driving data and a controller to initiate and maintain autonomous braking even if the detection device is damaged, ensuring the vehicle is decelerated to a predetermined speed or standstill, using both braking devices to dissipate kinetic energy and prevent further collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the detection device is used for autonomous braking control, then the braking system can intervene to prevent collisions, but the detection device is damaged in collisions causing loss of autonomous braking functionality
Solution Approach 1:
The system performs preliminary actions by detecting collision imminence before the actual collision occurs. The controller monitors driving data and identifies when a collision is imminent, then continues autonomous braking based on pre-established collision criteria even if the detection device fails during the collision event.
Solution Approach 2:
The system applies beforehand cushioning by maintaining braking force after collision detection. The controller continues to apply braking force for a predetermined time period after detecting a collision, cushioning the impact by dissipating kinetic energy even when the detection device is damaged.
2Measurement precision
If autonomous braking is interrupted when detection device fails, then the system avoids false braking based on damaged sensor data, but kinetic energy is not effectively dissipated increasing collision severity
Solution Approach 1:
The system uses feedback by monitoring the status of the detection device and the ongoing collision event. The controller receives feedback about collision detection and continues braking based on this feedback, maintaining energy dissipation until the predetermined time period elapses or the vehicle stops.
Solution Approach 2:
The system applies self-service by using the braking system itself to continue dissipating energy after collision detection without requiring continued input from the damaged detection device. The autonomous braking function serves itself by maintaining operation based on the collision event that triggered it.
3Reliability
If the detection device function is monitored continuously, then autonomous braking can continue after collision, but the system complexity increases
Solution Approach 1:
The controller is pre-programmed with collision detection algorithms and continuous monitoring functions. This preliminary setup allows the system to automatically detect collisions and continue braking without requiring complex real-time decision-making infrastructure beyond standard controller capabilities.
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
Ensures uninterrupted autonomous braking until the vehicle reaches a safe speed or standstill, effectively mitigating collision consequences by maintaining braking force even after a collision, preventing vehicles from being pushed into each other.
Implementation Method 1
the service brake is applied autonomously... the kinetic energy of the affected vehicle is dissipated by the deformation work based on the collision
Data Source
AI summary
The invention relates to a driver assistance system (2) for a vehicle (1), comprising a detecting device (4), which is designed to detect driving data that characterize the driving state of the vehicle (1), and comprising a controller (10), which is designed to process the driving data detected by the detecting device (4) and, if predetermined driving data are present, trigger a braking device to perform autonomous braking of the vehicle (1). According to the invention, the controller (10) is also designed in such a way that if driving data that indicate an imminent collision with an obstacle (6) are detected, the function of the detecting device (4) is monitored and, if the detecting device (4) no longer provides any driving data or plausible driving data to the controller (10), a continuation of the autonomous braking is triggered, at least until the vehicle (1) has been decelerated to a specified speed.