Vehicle Control Circuit Failure Management Strategy
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Solution Overview
Problem
Autonomous driving systems face risks when apparatus failures occur during operation, potentially endangering drivers, as existing systems lack effective strategies to manage and mitigate these failures.
Innovation Solution
A vehicle control apparatus and method that includes external sensors, vehicle sensors, a steering device, acceleration/deceleration device, output device, communication circuit, and control circuit to detect failures, output warning signals, control speed reduction, and maintain lane position, with strategies tailored to different failure categories, including stopping the vehicle and activating hazard lights.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If autonomous driving system operates without failure management strategy, then system complexity is reduced, but driver safety deteriorates when failures occur
Solution Approach 1:
The failure management strategy is segmented into distinct time intervals (first time interval for warning, second time interval for speed reduction, third time interval for stopping). This segmentation allows the system to handle failures in a structured manner without requiring overly complex real-time decision-making, thus improving driver safety while keeping the control system manageable.
Solution Approach 2:
The system performs preliminary actions by detecting failures early and issuing warnings to the driver before actual dangerous conditions develop. The control circuit detects failures in the autonomous driving system and outputs warning signals to the output device, allowing the driver to take preventive actions before safety is compromised.
2Loss of information
If failure warning is provided continuously, then driver awareness is improved, but driver distraction increases
Solution Approach 1:
The warning signal is output periodically or at specific intervals rather than continuously. The control circuit outputs warning signals to the output device at defined time intervals, ensuring the driver receives failure information without being constantly distracted by continuous alerts.
3Reliability
If vehicle speed is reduced immediately upon failure detection, then safety is improved, but driving efficiency deteriorates
Solution Approach 1:
The system dynamically adjusts vehicle speed based on the detected failure type and severity. The control circuit controls the acceleration/deceleration device to reduce vehicle speed to a target speed during the second time interval, and may stop the vehicle during the third time interval. This dynamic adjustment balances safety requirements with driving efficiency by not immediately stopping for all failure types.
Solution Approach 2:
The system changes operational parameters (vehicle speed) based on failure conditions. The control circuit modifies the speed parameter from normal operating speed to a reduced target speed, and potentially to zero, depending on the failure type and time interval, thereby maintaining safety while minimizing impact on driving efficiency.
4Measurement precision
If multiple control actions are taken for different failure types, then failure response accuracy is improved, but control system complexity increases
Solution Approach 1:
The system applies different control strategies tailored to specific failure types and locations. The control circuit determines the type of failure and applies appropriate responses: speed reduction for less critical failures, complete stopping for critical failures, and selective activation of safety devices. This localized approach improves response accuracy while managing complexity through structured decision-making.
Data Source
AI summary
A driving control apparatus for a vehicle includes: one or more external sensors, one or more vehicle sensors, a steering device, an acceleration/deceleration device, an output device, a communication circuit, and a control circuit. The control circuit detects a failure associated with autonomous driving while the vehicle performs the autonomous driving, outputs the warning signal for a transfer of control of the vehicle by using the output device for a first time interval, when the failure is detected, controls the acceleration/deceleration device for a second time interval after the first time interval to reduce a travel speed of the vehicle to a target speed, and controls the steering device and the acceleration/deceleration device after the second time interval to maintain a travel lane of the vehicle with the travel speed lower than the target speed.