Adaptive Deceleration Control for Passenger Safety
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Solution Overview
Problem
Existing vehicle collision avoidance systems fail to account for passengers who are not seatbelt-fastened, leading to potential injury during sudden braking, and may cause discomfort due to excessive deceleration even when no collision occurs.
Innovation Solution
An anti-collision longitudinal self-adaptive adjusting system that includes a host vehicle with modules for obstacle detection, passenger status sensing, and a controller to calculate optimal deceleration commands based on passenger seating/standing status, road conditions, and collision risk, adjusting vehicle velocity and suspension dampers to minimize passenger injury.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If urgent braking is applied to avoid collision, then collision avoidance capability is improved, but passenger safety deteriorates due to potential injury from hitting or falling on the vehicle
Solution Approach 1:
The system dynamically adjusts the deceleration command based on real-time passenger status detection. When passengers are detected standing or not seated properly, the system modifies the deceleration profile to reduce sudden braking intensity, thereby balancing collision avoidance with passenger safety
Solution Approach 2:
The suspension system acts as an intermediary between the braking system and passengers. By adjusting suspension dampers in response to detected passenger status, the system provides additional protection against passenger injury during deceleration events
2Speed
If large deceleration is applied to stop the vehicle, then stopping distance is reduced, but passenger comfort deteriorates
Solution Approach 1:
The system dynamically adjusts deceleration magnitude based on passenger status. When passengers are properly seated and seatbelted, higher deceleration is permitted for shorter stopping distances. When passengers are standing or improperly seated, the system reduces deceleration to maintain comfort
Solution Approach 2:
The system changes the deceleration parameter based on detected passenger conditions. The controller selects appropriate deceleration levels from a range of possible values, adjusting this critical parameter to balance stopping performance with passenger comfort
3Object-affected harmful factors
If the system adjusts deceleration based on passenger status, then passenger safety is improved, but system complexity increases due to additional sensing and control requirements
Solution Approach 1:
The system uses existing vehicle components (suspension system, braking system) for multiple functions. The suspension dampers serve both their traditional role and as an additional safety mechanism for passenger protection during deceleration events
Solution Approach 2:
The system leverages existing sensor data from the vehicle's environment sensing and cabin status sensing systems to determine passenger status, rather than requiring entirely new sensing infrastructure. The controller integrates this existing data with deceleration control
Data Source
AI summary
An anti-collision longitudinal self-adaptive adjusting system includes a host vehicle, an external environment sensing module, a cabin internal status sensing module and a controller. A self-adaptive deceleration command calculating unit calculates a self-adaptive deceleration command at least according to a maximum deceleration threshold, a seatbelt dataset and a passenger standing dataset and calculates a suspension damper command according to the self-adaptive deceleration command. A self-adaptive deceleration command output unit calculates a braking point distance at least according to a system operating delay time and the self-adaptive deceleration command so as to obtain a brake start-till-stop time. If the brake start-till-stop time is larger than or equal to the obstacle collision time, the self-adaptive deceleration command is output to the propulsion module and the braking module for adjusting the longitudinal velocity, and the suspension damper command is output to the suspension module for adjusting the suspension damper.