Headway Distance Control Mode Transition Logic
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Solution Overview
Problem
Existing vehicle systems face challenges in effectively switching between different deceleration controls, particularly when transitioning from constant headway distance control to deceleration support control, especially in varying driving environments and driver operations.
Innovation Solution
A headway distance maintenance supporting system that includes a running controller for constant headway distance control, a deceleration controller for deceleration support, a running environment detector, an operation detector, and a system controller that adjusts control strategies based on detected transitional states and running environments to seamlessly transition between control modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If constant headway distance control is performed to maintain a fixed distance from the preceding vehicle, then the headway distance is maintained, but the system cannot adapt to transitional states or varying driving environments
Solution Approach 1:
The control system dynamically transitions between constant headway distance control and deceleration support control based on detected transitional states. The system controller adjusts the control mode according to running environment changes and driver operations, making the system adaptable while maintaining reliability in appropriate conditions.
Solution Approach 2:
The system uses feedback from the transitional state detector to determine when to switch between control modes. By continuously monitoring running environment and driver operations, the system adjusts its control strategy to maintain headway distance reliability while adapting to changing conditions.
2Adaptability or versatility
If the system switches between constant headway distance control and deceleration support control, then adaptability to different driving conditions is improved, but the control system complexity increases
Solution Approach 1:
The system controller serves multiple functions by managing both constant headway distance control and deceleration support control through a single integrated unit. This multi-functionality reduces overall system complexity while maintaining adaptability across different driving conditions.
Solution Approach 2:
The transitional state detector acts as an intermediary component that simplifies the switching logic between control modes. By detecting transitional states and providing clear switching signals, it reduces the complexity of the control system while enabling smooth transitions between different control strategies.
3Ease of operation
If deceleration support control is performed to support vehicle deceleration based on headway distance, then driver burden is reduced, but the system may inappropriate accelerate to follow preceding vehicle in certain running environments
Solution Approach 1:
The system performs preliminary detection of transitional states and driver operations before executing acceleration control. By anticipating inappropriate acceleration scenarios through environmental detection, the system prevents erroneous acceleration while maintaining deceleration support benefits, ensuring control appropriateness.
Solution Approach 2:
The system uses feedback from running environment detection and driver operation monitoring to determine when acceleration control is inappropriate. This feedback mechanism ensures that deceleration support control operates reliably by preventing inappropriate acceleration in specific driving conditions.
Data Source
AI summary
A headway distance maintenance supporting system may include a running controller for performing constant headway distance control, a deceleration controller for performing deceleration support control, a transitional state detector for detecting transitional states of said given vehicle based on the running environment of said given vehicle or the operations performed by the driver. The system controller is configured such that when said transitional state detector detects that the transitional state of said given vehicle is a prescribed transitional state, said running controller is controlled such that said constant headway distance control is released, and said deceleration controller is controlled such that said deceleration support control can be performed.