Adaptive Following Control Across Mixed-Accuracy Vehicle Sensors
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle control systems face discomfort issues when switching between high-accuracy and low-accuracy sensors due to significant changes in vehicle control details, such as speed and acceleration, leading to occupant discomfort.
Innovation Solution
A vehicle control device that integrates high-accuracy and low-accuracy sensors, using a control unit to perform following control with reduced changes in vehicle control when switching between sensor types, particularly by reducing the degree of change in vehicle control when using low-accuracy sensor information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If following control uses only low-accuracy sensor detection information, then the control can operate when high-accuracy sensor is unavailable, but the control details diverge significantly from high-accuracy sensor-based control causing occupant discomfort
Solution Approach 1:
The control details parameter is dynamically adjusted based on the sensor type being used. When low-accuracy sensor information is used, the control parameters (such as acceleration and speed changes) are modified to be more gradual and less aggressive, ensuring smooth transitions and maintaining occupant comfort even though the sensor accuracy is lower.
2Measurement precision
If following control uses high-accuracy sensor detection information, then the control precision is high, but the control cannot operate when high-accuracy sensor detection is unavailable
Solution Approach 1:
The control device acts as an intermediary that selects and switches between different sensor sources based on availability. When the high-accuracy sensor is unavailable, it seamlessly transitions to using low-accuracy sensor information, ensuring continuous control operation while managing the transition smoothly to maintain reliability.
3Adaptability or versatility
If the vehicle control switches between high-accuracy and low-accuracy sensor-based control, then the system maintains operational flexibility, but significant changes in speed and acceleration occur causing discomfort
Solution Approach 1:
The control device prepares for potential sensor switching by pre-adjusting control parameters to smoother values before the actual switch occurs. This cushioning effect prevents abrupt changes in acceleration and speed, ensuring that transitions between different sensor-based control modes are imperceptible to occupants and maintain comfort.
Data Source
AI summary
A vehicle control device is provided for a vehicle equipped with a high-accuracy sensor and a low-accuracy sensor to detect a preceding vehicle. The low-accuracy sensor is able to detect a distance to a preceding vehicle larger than a maximum distance to a preceding vehicle detectable by the high-accuracy sensor, and having low ranging accuracy. A control unit is configured to perform following control in which the vehicle is controlled so as not to collide with the preceding vehicle, using at least either of a first detection information derived from the high-accuracy sensor and a second detection information derived from the low-accuracy sensor, and further configured to, when performing the following control using only the second detection information, reduce a degree of change in vehicle control that is based on the second detection information, as compared to when performing the following control using the first detection information.