Cruise Speed Proposal Filtering for Driver-Controlled Speed Limits
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Solution Overview
Problem
Existing vehicle traveling assistance systems propose unnecessary changes in set vehicle speed, causing inconvenience to drivers by interrupting their ability to perform other operations.
Innovation Solution
A vehicle traveling assistance device that determines whether to propose a change in set vehicle speed based on a predetermined vehicle speed threshold value set by the operator, ensuring unnecessary proposals are suppressed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the system proposes a change in set vehicle speed whenever a speed limit is recognized, then the system responds actively to speed limit information, but unnecessary proposals are made that cause driver inconvenience and interrupt other operations
Solution Approach 1:
The system introduces a threshold parameter (vehicle speed threshold) that changes the proposal criteria from any speed limit recognition to only those speed limits that are both lower than the current set speed and above the threshold value. This parameter filtering resolves the contradiction by eliminating unnecessary proposals while preserving useful ones.
2Loss of information
If the system proposes speed changes frequently, then comprehensive speed limit information is provided to the driver, but the driver cannot perform other operations such as fine adjustment due to constant interruptions
Solution Approach 1:
The system applies partial action by selectively proposing only certain speed changes rather than all possible changes. By filtering proposals through the threshold condition, the system provides sufficient speed limit information without excessive interruptions, allowing the driver to perform other operations uninterrupted.
3Reliability
If the system automatically changes set vehicle speed to recognized speed limits, then speed compliance is improved, but the driver loses control over when changes occur
Solution Approach 1:
The system uses feedback by requiring driver approval before implementing speed changes. The threshold-based filtering provides preliminary feedback to eliminate obviously unnecessary proposals, while the final approval mechanism ensures driver control is maintained, resolving the contradiction between automated compliance and driver adaptability.
Data Source
AI summary
The vehicle traveling assistance device proposes a change of the set vehicle speed based on the traveling environment of the own vehicle during execution of the constant speed traveling control for autonomously controlling the traveling of the own vehicle so that the travel speed of the own vehicle is maintained at the set vehicle speed. The vehicle traveling assistance device determines whether or not to make a proposal based on whether or not the set vehicle speed after the change is equal to or higher than a predetermined vehicle speed threshold. The predetermined vehicle speed threshold is set by an operator of the own vehicle.