Hybrid Drive Control Architecture for Fail-Operational Continuity
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Solution Overview
Problem
Conventional control systems for autonomous driving face challenges in maintaining operation continuity during failures while minimizing redundancy and reducing costs.
Innovation Solution
A hybrid drive system with multiple energy sources, where a control unit mixes energy from different sources and an energy management unit ensures continued operation by switching to alternative power sources in case of failure, with redundant configurations for control units to prevent loss of function.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If redundant control units are provided to ensure operation continuity during failure, then reliability is improved, but device complexity and cost increase
Solution Approach 1:
The patent merges the autonomous driving control unit and drive system control unit into a single integrated control unit. This integration maintains fail-safe operation capability while reducing the number of separate control units needed, thereby lowering device complexity and cost while preserving reliability through the unified control architecture
Solution Approach 2:
The integrated control unit performs multiple functions: it acts as both the autonomous driving control unit (high-order arithmetic unit) and the drive system control unit (low-order arithmetic unit). This multi-functionality eliminates the need for separate redundant control units while maintaining operation continuity capability through its dual-role design
2Reliability
If multiple separate control units are used for autonomous driving and drive system control, then functional safety is improved, but manufacturing cost increases
Solution Approach 1:
The patent combines two previously separate control units (autonomous driving control unit and drive system control unit) into one integrated control unit. This merging reduces manufacturing costs by eliminating duplicate hardware while maintaining functional safety through the unified control unit's ability to perform both high-order planning and low-order execution functions
Solution Approach 2:
The integrated control unit is designed with universal functionality to perform both autonomous driving control (path planning, decision making) and drive system control (motor control, power management). This multi-functional design achieves cost reduction by using a single control unit for multiple purposes while preserving functional safety requirements
Data Source
AI summary
A vehicle control system includes a transmission unit, first and second sources, as well as first, second, and third control units. The first control unit controls the transmission unit. The first source inputs energy to the transmission unit. The second source inputs energy to the transmission unit. The second control unit controls the first source. The third control unit controls the second source. The first control unit has a function of continuing an operation when a failure occurs. The second control unit and the third control unit have a common cause failure measure. The function mixes energy from different sources and transmits energy to the driving wheel.