Autonomous Driving Handover with Parking Brake After Minimum Risk Maneuver
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Solution Overview
Problem
Existing autonomous driving systems do not adequately address the risk of vehicles leaving their lanes after stopping, particularly when the control authority is transferred back to the user following a minimum risk maneuver.
Innovation Solution
The vehicle system automatically engages the electronic parking brake after a minimum risk maneuver is completed and the vehicle has stopped, ensuring that the autonomous driving control function is released and preventing unintended vehicle movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the autonomous driving control function is released after performing a minimum risk maneuver, then the user can resume control of the vehicle, but the vehicle may inadvertently leave its lane after stopping
Solution Approach 1:
The system performs preliminary actions by automatically engaging the parking brake and deactivating the autonomous driving function before the vehicle could potentially leave its lane. This preventive sequence ensures the vehicle remains stationary and on course even when the user has not yet fully assumed control
Solution Approach 2:
The parking brake acts as an intermediary mechanism between the autonomous driving system and the vehicle's motion state. By engaging the brake as an intermediate safety measure, the system prevents direct transitions that could lead to unintended lane departure while the user takes over control
2Device complexity
If the vehicle stops after a minimum risk maneuver without automatic parking brake engagement, then the system remains simple and responsive, but additional risks arise from potential lane departure
Solution Approach 1:
The system extracts the parking brake engagement function from the basic stopping sequence and makes it an automatic, mandatory step. This separation ensures that the safety function operates independently and reliably, preventing lane departure risks without significantly complicating the overall control architecture
Solution Approach 2:
The autonomous driving system automatically manages the parking brake engagement without requiring additional user input or complex external systems. The system serves itself by autonomously determining when brake engagement is necessary and executing it as part of the standard stop procedure after minimum risk maneuvers
Data Source
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AI summary
An autonomous driving control apparatus (100) for a vehicle includes: a processor (1100, 130) that determines whether a current driving condition of the vehicle is a limit situation (S102) during an autonomous driving control, performs a demand for control authority transition to a user (S103) during the autonomous driving control when the current driving condition is the limit situation, and starts a minimum risk maneuver (S105) to transmit a signal for disabling reactivation of the autonomous driving control (S106) when control authority is not transferred to the user (S103); and a storage (120, 1600) to store a set of instructions and driving condition data to be used by the processor (1100, 130). In particular, the processor (1100, 130) demands for engagement of an electronic parking brake device (S110) when the vehicle is stopped after the minimum risk maneuver ends.