Minimal Risk Lane Change Control Under Sensor and Weather Events
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Solution Overview
Problem
Existing advanced driver assistance systems (ADAS) face challenges in performing minimal risk maneuvers during autonomous driving due to issues with vehicle state and surrounding environment, such as weather, road conditions, and sensor malfunctions, necessitating effective control methods for safe lane changes and stops.
Innovation Solution
A vehicle apparatus equipped with a processor and memory that uses sensors to obtain vehicle and environmental information, determines required vehicle-to-vehicle distances, generates control signals for lane changes, and adjusts driving parameters to ensure safe maneuvers, including varying lateral acceleration and stop target settings based on predefined events.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicle performs a lane change maneuver to avoid collision risk, then the safety is improved, but the required vehicle-to-vehicle distance increases
Solution Approach 1:
The system dynamically adjusts the required vehicle-to-vehicle distance based on whether a predefined event occurs. When an event occurs (e.g., sensor malfunction, adverse weather), the system calculates a first required distance that is shorter than the second required distance calculated when no event occurs. This dynamic adjustment allows the vehicle to perform lane change maneuvers more readily under adverse conditions while maintaining safety.
Solution Approach 2:
The system changes the parameter of required vehicle-to-vehicle distance based on event occurrence. The processor determines different distance parameters (first required distance vs. second required distance) depending on the operational conditions, allowing optimization of both safety and maneuverability under different scenarios.
2Reliability
If the vehicle maintains a larger safety distance to account for adverse conditions, then the reliability is improved, but the lane change capability deteriorates
Solution Approach 1:
The system dynamically switches between maintaining a larger safety distance (when no event occurs) and allowing reduced distance (when event occurs), thereby balancing safety requirements with lane change capability based on real-time operational conditions.
Solution Approach 2:
The safety distance requirement is segmented into two distinct modes: first required distance for event conditions and second required distance for normal conditions. This segmentation allows the system to apply appropriate safety margins only when necessary, improving lane change capability without compromising overall safety.
3Speed
If the vehicle responds quickly to predefined events by reducing reaction distance, then the responsiveness is improved, but the safety margin decreases
Solution Approach 1:
The system changes the reaction distance parameter based on event occurrence. When a predefined event occurs, the system calculates a first reaction distance that is shorter than the second reaction distance for normal conditions. This parameter change enables faster response to critical events while maintaining adequate safety margins during normal operation.
Solution Approach 2:
The reaction distance is dynamically adjusted based on the operational context. The system transitions between longer reaction distances (normal conditions) and shorter reaction distances (event conditions), optimizing both responsiveness and safety margin according to real-time needs.
Data Source
AI summary
An apparatus of a vehicle may comprise a processor and a memory storing at least one instruction that, when executed by the processor communicating with the memory, is configured to cause the apparatus to obtain, using a sensor, vehicle state information of the vehicle and surrounding environment information of the vehicle, determine a present vehicle-to-vehicle distance and a required vehicle-to-vehicle distance, generate, based on the present vehicle-to-vehicle distance and the required vehicle-to-vehicle distance, a lane change control signal comprising a first control signal or a second control signal, and control, based on the lane change control signal, driving of the vehicle.