Redundant Vehicle Control for Sensor and Power Supply Failures
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Solution Overview
Problem
Existing vehicle control systems face challenges in maintaining reliable operation when components such as power supply units or sensors fail, leading to potential disruptions in automated driving capabilities.
Innovation Solution
A vehicle device with redundant power supply and sensor units, allowing for continued vehicle control through alternative systems even when one set fails, by integrating detection results from multiple sensors and switching to restricted control modes when abnormalities are detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If redundant power supply units and sensor units are implemented, then reliability is improved, but device complexity increases
Solution Approach 1:
The system is divided into two independent subsystems: a first subsystem with first power supply unit, first sensor unit, and first control device; and a second subsystem with second power supply unit, second sensor unit, and second control device. Each subsystem can operate independently, allowing the system to maintain functionality even when one subsystem fails. This segmentation resolves the contradiction by organizing redundancy into modular, independent units that improve reliability without requiring a completely complex monolithic structure.
Solution Approach 2:
Different parts of the system have different functions and characteristics. The first and second sensor units detect different types of information (e.g., longitudinal position and lateral position respectively), and the control devices process this information differently to generate appropriate control signals. This local differentiation allows each component to be optimized for its specific function while contributing to overall system reliability through diversity.
2Measurement precision
If multiple sensor units and control devices are used, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The detection results from the first sensor unit and second sensor unit are integrated by the control devices to generate comprehensive control signals. The first control device combines information from both sensor units to control longitudinal movement, while the second control device combines information to control lateral movement. This merging of multiple detection sources improves measurement precision by providing multiple data points that can be cross-validated and combined for more accurate control decisions.
3Reliability
If redundant systems are implemented for continued operation, then reliability is improved, but the number of configuration elements increases
Solution Approach 1:
Both the first and second sensor units are capable of detecting multiple types of information including longitudinal position, lateral position, and surrounding objects. Similarly, both control devices can process various types of detection results and generate appropriate control signals for different movement directions. This multi-functionality reduces the need for specialized redundant components, as each subsystem can potentially perform multiple functions, thereby reducing the overall number of configuration elements needed while maintaining reliability.
Data Source
AI summary
A First sensor unit is operable when supplied with electric power from a first power supply unit to detect a front obstacle in front of a vehicle and to detect lateral position information on a position of the vehicle in a road width direction. A first control device is operable when supplied with electric power from the first power supply unit to control the vehicle based on a detection result of the first sensor unit. A second sensor unit is operable when supplied with electric power from a second power supply unit to detect the front obstacle and to detect the lateral position information. A second control device is operable when supplied with electric power from the second power supply unit to control the vehicle based on a detection result of the second sensor unit.