Vehicle Travel Control Apparatus Reliability-Based Sensor Selection
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Solution Overview
Problem
Existing vehicle control systems face challenges in implementing precise and stable automatic driving due to the comparison of travelable regions set by different sensors, leading to difficulties in continuous automatic driving and appropriate response to driver input.
Innovation Solution
A travel control apparatus that includes a frontward environment recognition unit, a reliability calculator, a map information storage unit, a map information updating unit, a control information selector, and an automatic driving control execution unit, which compares the reliability of frontward environment information with map information update reliability to select the appropriate information for automatic driving control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the travelable region is determined by comparing reliability of sensor information with map information, then the reliability of automatic driving control is improved, but the continuity of automatic driving is deteriorated when sensor reliability is low
Solution Approach 1:
The system dynamically switches between two control modes: using sensor information when reliability is high, and using map information when reliability is low. This dynamic adaptation allows continuous automatic driving while maintaining reliability by selecting the appropriate information source based on real-time conditions.
Solution Approach 2:
The reliability determination unit acts as an intermediary that evaluates sensor information quality and mediates between sensor-based control and map-based control. When sensor reliability falls below a threshold, the system transitions to map information, ensuring continuous operation without abrupt failures.
2Measurement precision
If sensor information is used for automatic driving control, then the precision of driving control is improved, but the stability of continuous automatic driving is deteriorated when sensor reliability varies
Solution Approach 1:
The system changes the parameter of information source based on reliability conditions. When sensor reliability is high, sensor information is used for precise control. When reliability drops, the system switches to map information, maintaining stability by adapting to changing conditions rather than rigidly persisting with unreliable sensor data.
3Reliability
If the travelable region is restricted when camera reliability is low, then the safety of automatic driving is improved, but the usability of automatic driving is deteriorated
Solution Approach 1:
The system dynamically adjusts the travelable region based on camera reliability. When reliability is high, a larger region is permitted for greater usability. When reliability drops, the region is restricted to maintain safety. This dynamic adjustment balances safety and usability based on real-time sensor performance.
Data Source
AI summary
A travel control apparatus for a vehicle includes: a frontward environment recognition unit that obtains frontward environment information by recognizing a frontward environment of the vehicle; a frontward environment information reliability calculator that calculates a reliability of the frontward environment information; a map information storage unit that stores map information relating to a travel region of the vehicle on the basis of position information indicating a position of the vehicle; a map information updating unit that updates the map information while calculating a reliability of the map information; a control information selector that compares the reliability of the frontward environment information with update information relating to the map information, and selects either one of the frontward environment information and the map information as information to be used during automatic driving control; and an automatic driving control execution unit that executes the automatic driving control based on the selected information.