Vehicle Safety Control for Probabilistic Side Impact Point Shifting
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Solution Overview
Problem
Existing vehicle safety systems face challenges in accurately predicting and managing the impact point of collisions, particularly in side impact scenarios, leading to uncertainties that can result in undesirable occupant safety outcomes.
Innovation Solution
A method and apparatus that utilize environment and trip data to estimate the uncertainty and probability of impact points, enabling the control of safety devices such as autonomous emergency braking systems to adjust the vehicle's trajectory and reduce collision energy by displacing the impact point to safer regions, thereby enhancing occupant safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If autonomous emergency braking is activated to reduce collision energy, then occupant safety is improved, but the impingement point may be displaced into an unfavorable region of the vehicle
Solution Approach 1:
The system performs preliminary calculation of the expected impingement point before activating autonomous emergency braking. By predicting where the collision will occur and how it will be displaced by braking intervention, the system can assess whether the displacement will be favorable or unfavorable, and make informed decisions about whether to activate the safety device
Solution Approach 2:
The system uses feedback from the calculated impingement point displacement to control the safety device activation. The displacement information feeds back into the decision-making process, allowing the system to adjust or suppress activation based on whether the predicted displacement will result in a favorable or unfavorable impingement point location
2Object-affected harmful factors
If the safety device suppresses activation to avoid unfavorable impingement point displacement, then harmful effects are reduced, but collision energy is not reduced
Solution Approach 1:
The system calculates the expected impingement point and its potential displacement before the collision occurs. This preliminary assessment allows the system to distinguish between cases where suppression is necessary (when displacement would be unfavorable) and cases where activation should proceed (when displacement would be favorable or energy reduction is more critical)
3Reliability
If the system activates safety devices based on predicted impingement points, then occupant safety is improved, but system complexity increases due to uncertainty calculation
Solution Approach 1:
The system introduces an intermediary calculation layer that computes uncertainty values and probability distributions for impingement point locations. This intermediary processing layer translates sensor data and intervention parameters into probabilistic predictions, enabling informed decision-making without requiring complex redesign of the entire safety system
Data Source
AI summary
A method for controlling a safety device of a vehicle. The safety device reacts to an imminent collision by an intervention in a guidance of the vehicle. Environment data and trip data regarding the collision object and the vehicle, and intervention data regarding a planned intervention of the safety device, are read in. First and second expected impingement points of the collision object on the vehicle are ascertained; an uncertainty value of the impingement points is ascertained; and a probability value for a location of at least one of the impingement points relative to subregions referred to the vehicle, is ascertained using the uncertainty value. An evaluation of a location of the impingement points relative to the subregions is executed using the at least one probability value and reference data. S control signal for controlling the safety device is generated depending on a result of the evaluation.