Vehicle Takeover Notification Control for Variable Speed Limits
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Solution Overview
Problem
Existing vehicle control systems face challenges in appropriately timing notifications for mode transitions, leading to increased difficulty in driver takeovers due to fixed notification timing that does not account for varying travel environments and speed limits, potentially resulting in delays and decreased user convenience.
Innovation Solution
A control system that adjusts the upper limit speed and notification timing based on the vehicle's traveling state and environment, providing a request for driver operation when the vehicle reaches a predetermined speed, with varying notification intensity and timing adjusted according to the upper limit speed, ensuring smooth mode transitions and high passenger convenience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If notification timing is fixed when mode changes, then the system operation is simple, but the timing of notification is not appropriate and driver takeover is delayed
Solution Approach 1:
The notification timing is made dynamic by adjusting it based on the upper limit speed. When the upper limit speed is high, notification is given earlier (larger speed difference), and when the upper limit speed is low, notification is given later (smaller speed difference). This dynamic adjustment ensures appropriate timing for driver takeover across different driving conditions.
Solution Approach 2:
The system changes the notification timing parameter based on the upper limit speed parameter. By varying the speed difference threshold (notification trigger point) according to the upper limit speed, the system adapts the notification timing to match the current driving environment and speed constraints.
2Reliability
If notification timing is adjusted according to upper limit speed, then driver takeover timing is appropriate, but the control system complexity increases
Solution Approach 1:
The system adjusts the notification timing parameter (speed difference threshold) based on the upper limit speed parameter. This parameter change approach allows the system to adapt to different driving conditions without requiring complex structural modifications, maintaining relatively simple control logic while improving reliability.
3Productivity
If the vehicle travels at high upper limit speed, then the travel efficiency is high, but the notification timing becomes inappropriate and driver reaction time is insufficient
Solution Approach 1:
The notification timing is dynamically adjusted based on the upper limit speed. At high speeds, the system triggers notification at a larger speed difference, giving the driver more time to react. At low speeds, notification is triggered at a smaller speed difference, avoiding premature alerts and maintaining travel efficiency.
Data Source
AI summary
A control system for a vehicle capable of traveling in first and second traveling states is provided. The second traveling state requires an operation related to traveling by a passenger more than the first traveling state. The system changes, based on a traveling situation of the vehicle, an upper limit speed at which the vehicle can travel in the first traveling state. The system performs notification to the passenger of a request for a predetermined operation at a timing when a traveling speed of the vehicle reaches a predetermined speed when switching from the first traveling state to the second traveling state. A difference between the upper limit speed and the predetermined speed is increased in a case where the upper limit speed is high compared to a case where the upper limit speed is low.