Vehicle Sensor Range Adaptation for Automated Driving Control
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Solution Overview
Problem
Conventional driver assistance systems are inefficient as they shut down when sensor ranges are limited due to external influences like weather conditions, affecting the control of vehicle movement and speed, especially in higher levels of automation where continuous operation is desirable.
Innovation Solution
A method that determines the current sensor range and adjusts driving parameters based on this range, allowing the system to continue operating by switching between sensors and using image processing and object representation to assess the environment, ensuring adaptive control strategies even with reduced sensor functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the driver assistance system shuts off when sensor range is limited, then system reliability is maintained, but system productivity and adaptability deteriorate
Solution Approach 1:
The system dynamically adapts its control strategy based on the current sensor range. Instead of a static shutdown decision, the system continuously monitors sensor performance and adjusts driving parameters (speed, acceleration, decision time) in real-time to match the available sensor range, allowing continuous operation under varying conditions
Solution Approach 2:
The system changes operational parameters when sensor range is limited. Specifically, it reduces maximum speed, adjusts acceleration behavior, and modifies decision-making time horizons to compensate for the reduced sensor range, thereby maintaining safe operation without shutting down the system
2Measurement precision
If the driver assistance system shuts off when sensor range is limited, then measurement precision is preserved, but adaptability deteriorates
Solution Approach 1:
The system changes operational parameters when sensor range is limited. Specifically, it reduces maximum speed, adjusts acceleration behavior, and modifies decision-making time horizons to compensate for the reduced sensor range, thereby maintaining safe operation without shutting down the system
Solution Approach 2:
The system dynamically adapts its control strategy based on the current sensor range. Instead of a static shutdown decision, the system continuously monitors sensor performance and adjusts driving parameters (speed, acceleration, decision time) in real-time to match the available sensor range, allowing continuous operation under varying conditions
3Adaptability or versatility
If the system uses full sensor range for automated driving, then adaptability is improved, but system reliability deteriorates when external influences reduce sensor performance
Solution Approach 1:
The system implements feedback by continuously monitoring the actual sensor range and comparing it against the maximum sensor range. Based on this feedback, the control device adjusts driving parameters to ensure safe operation. This closed-loop control maintains reliability by adapting to actual sensor performance while preserving adaptability through continuous parameter adjustment
Data Source
AI summary
At least one object is detected, via a sensor, in a direction of movement ahead of a host vehicle. A current sensor range is determined based on the detected at least one object. A maximum sensor range is determined based on the sensor. The current sensor range is compared with the maximum sensor range. Upon determining the current sensor range is less than the maximum sensor range by at least a predetermined threshold, driving parameters of the host vehicle are updated based on the current sensor range.