Vehicle Speed Handover Display for Smooth ADAS Driver Transition
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Solution Overview
Problem
The transition of vehicle speed control from an ADAS or AD system to a vehicle driver often results in a less smooth handover, potentially causing discomfort and hazardous situations due to discrepancies between system-initiated and driver-initiated control parameters.
Innovation Solution
A deviation assessment system that derives current system and driver values for speed-affecting parameters, presenting a graphical representation of the discrepancy on a vehicle display to help the driver adjust their input accordingly, thereby facilitating a smoother transition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the ADAS or AD system immediately stops sending control commands when the driver takes over, then the handover of control is achieved, but the transition becomes less smooth causing passenger discomfort and hazardous situations
Solution Approach 1:
The system performs preliminary actions by gradually reducing the gain of the ADAS controller before complete handover, rather than immediately stopping control commands. This gradual reduction prepares the system for smooth transition by preemptively adjusting control parameters to match anticipated driver input, preventing abrupt changes and ensuring safety during the transition process.
2Ease of operation
If the ADAS system maintains control during driver take-over, then smooth transition is achieved, but the driver cannot take full control
Solution Approach 1:
The system dynamically adjusts the gain of the ADAS controller during the transition process. The gain reduction is not static but evolves over time based on driver input detection and system state, allowing the control authority to shift smoothly from the ADAS system to the driver. This dynamic adjustment enables both smooth transition and complete driver control authority.
3Loss of time
If the system abruptly hands over control to the driver, then the handover is completed quickly, but passenger discomfort and hazardous situations occur
Solution Approach 1:
The system applies beforehand cushioning by gradually reducing the ADAS controller gain before complete handover occurs. This gain reduction acts as a cushion that absorbs the shock of control transition, preventing abrupt changes in vehicle behavior that would cause passenger discomfort or safety hazards. The cushioning effect is achieved through controlled gain reduction over a predetermined time period.
Data Source
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AI summary
The present disclosure relates to a method performed by a deviation assessment system (1) of a vehicle (2) for supporting transitioning of speed control from an ADAS or AD system (21) of the vehicle, to a vehicle driver. The deviation assessment system derives (1001) a current system-initiated value of a speed-affecting system parameter pertinent speed control by the ADAS or AD system. The deviation assessment system further derives (1002) a value of a corresponding speed-affecting intervention parameter pertinent a driver-initiated speed-affecting intervention of the speed control. Moreover, the deviation assessment system presents (1003) on a vehicle display (23) a graphical representation (4) indicative of a discrepancy between the system-initiated value and the driver-initiated value. The disclosure also relates to a deviation assessment system in accordance with the foregoing, a vehicle comprising such a deviation assessment system, and a respective corresponding computer program product and non-volatile computer readable storage medium.