Vehicle Power Supply Isolation for Autonomous Driving Reliability
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Solution Overview
Problem
Existing autonomous driving vehicle systems face reliability issues due to the interconnectedness of power supply systems, where a failure in the autonomous driving system's power supply can compromise the vehicle platform's power supply, leading to potential safety and operational risks.
Innovation Solution
The implementation of an independent power supply structure for the autonomous driving system and the vehicle platform, with redundant secondary power systems in both, allowing the vehicle platform to maintain functionality even if the primary power supply fails, ensuring continued operation of critical systems like steering and braking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the autonomous driving system shares the same power supply structure as the vehicle platform, then the overall system integration is simplified, but the reliability of the vehicle platform's power supply is compromised when the autonomous driving system experiences power supply failures
Solution Approach 1:
The power supply system is segmented into two independent parts: one for the vehicle platform and another for the autonomous driving system. This segmentation allows each subsystem to have its own power supply path, preventing failures in one system from affecting the other, thereby resolving the contradiction between integration simplicity and reliability.
Solution Approach 2:
The power supply structure for the autonomous driving system is extracted from the vehicle platform's power supply system. By separating the autonomous driving system's power supply path, the patent ensures that failures in the autonomous driving system do not compromise the vehicle platform's power supply reliability, while maintaining manageable system complexity.
2Ease of operation
If a centralized power supply system is used for both the vehicle platform and autonomous driving system, then system management is simplified, but failure propagation between systems increases reliability risks
Solution Approach 1:
The centralized power supply management is segmented into separate management domains: one for the vehicle platform and another for the autonomous driving system. Each domain manages its own power supply independently, preventing failure propagation while maintaining ease of operation within each domain.
3Device complexity
If the autonomous driving system uses the vehicle platform's power supply, then the number of power supply components is reduced, but the autonomous driving system becomes vulnerable to power supply failures in the vehicle platform
Solution Approach 1:
The power supply path for the autonomous driving system is extracted from the vehicle platform's power supply system. This extraction creates an independent power supply path that reduces component sharing, thereby improving the autonomous driving system's reliability without significantly increasing overall system complexity.
Data Source
AI summary
A vehicle includes an ADK that creates a driving plan, a VP that carries out vehicle control in accordance with various commands from the ADK, and a vehicle control interface that interfaces between the VP and the ADK. A power supply structure for the ADK is provided independently of a power supply structure for the VP.