Vehicle Control System Segmentation for Automated Driving Reliability
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Solution Overview
Problem
Existing vehicle control systems for automated driving face challenges in distributing control processes effectively, leading to high loads on control units and reduced reliability.
Innovation Solution
A vehicle control system comprising an automated driving control unit and a driving support control unit, both communicably connected, where the driving support control unit controls steering, driving, and braking based on signals from the automated driving control unit, utilizing redundant functions and diverse detection units like lidars and radars to improve reliability and process distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiplexed control units execute the same control operations to improve reliability, then reliability is improved, but the load on control units increases and process distribution is reduced
Solution Approach 1:
The patent divides the control system into two distinct control units: an automated driving control unit that performs automated driving control, and a driving support control unit that performs driving support control. This segmentation allows different control processes to be distributed across separate units rather than requiring all units to execute identical operations, thereby maintaining reliability through redundancy while reducing the load on each individual control unit.
2Reliability
If multiplexed control units execute the same control operations to improve reliability, then reliability is improved, but process distribution is reduced
Solution Approach 1:
The control system is segmented into specialized units with different functions: automated driving control and driving support control. This allows diverse control processes to be distributed across the system while maintaining reliability through the redundant capability of the driving support control unit to perform automated driving control when needed.
Solution Approach 2:
The driving support control unit is designed with multi-functionality, capable of both driving support control and automated driving control. This universality allows the system to distribute control processes across different units based on operational needs while ensuring that reliability is maintained through the ability of the driving support control unit to take over automated driving functions if required.
3Reliability
If redundant functions are implemented to improve reliability, then reliability is improved, but device complexity increases
Solution Approach 1:
The driving support control unit is designed with multi-functionality, capable of both driving support control and automated driving control. This universality allows the system to achieve redundancy and improved reliability without adding a completely separate automated driving control unit, thereby limiting the increase in device complexity while still maintaining the ability to distribute control processes.
Data Source
AI summary
A vehicle control system includes an automated driving control unit for controlling, based on surrounding environment information of a vehicle, driving, braking, and/or steering of the vehicle without depending on a driving operation of a driver; and a driving support control unit for supporting driving of the vehicle by the driver by controlling driving, braking, and/or steering of the vehicle. The control units are communicably connected. The driving support control unit can control, depending on a reception result of a signal received from the automated driving control unit, steering, and driving and/or braking of the vehicle based on the surrounding environment information without depending on the driving operation of the driver.