Autonomous Vehicle Track Control for Ride Comfort and Fail-Safe Safety
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Solution Overview
Problem
Existing vehicle control systems face issues with riding comfort and safety due to separate hardware for track generation and vehicle control, leading to decreased comfort from slippage and potential failures in automatic driving systems.
Innovation Solution
A vehicle control device with a driving plan calculation unit that determines a drivable area and a vehicle motion control unit that stabilizes track follow-up control to ensure riding comfort, while distributing automatic driving systems across multiple controllers to maintain safety in case of failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If track point sequence information is used as communication interface between different hardware, then the system can communicate between separate hardware units, but riding comfort deteriorates when the vehicle cannot drive along the track point sequence information due to slippage or road surface conditions
Solution Approach 1:
The patent divides the control system into two independent controllers: one for track generation and one for vehicle motion control. This segmentation allows each controller to specialize in its function while maintaining communication through standardized interfaces, resolving the contradiction by enabling both hardware communication and reliable ride comfort through specialized processing.
Solution Approach 2:
The patent introduces a track generation result output unit and track follow-up control input unit as intermediary components between the two controllers. These intermediaries translate and adapt the track point sequence information to account for actual vehicle conditions like slippage and road surface variations, maintaining riding comfort while enabling communication between separate hardware units.
2Device complexity
If automatic driving control is mounted on a single controller, then the system structure is simple, but safety cannot be ensured when a power supply failure occurs
Solution Approach 1:
The patent segments the automatic driving control system into two separate controllers, each handling specific functions. This segmentation inherently provides redundancy and fault isolation, ensuring that a failure in one controller does not compromise the entire system, thus improving safety while maintaining reasonable structural complexity.
Solution Approach 2:
The patent implements fail-safe mechanisms and redundant control paths in advance. When a power supply failure or other anomaly occurs in one controller, the system has pre-established backup procedures and alternative control modes that ensure safety, effectively cushioning against potential failures before they impact system reliability.
Data Source
AI summary
Provided is a vehicle control device that can ensure riding comfort or safety. A vehicle control device includes a driving plan calculation unit that calculates a drivable area, which is a space in which an own vehicle is safely drivable, based on a driving environment around the own vehicle and a destination of the own vehicle; and a vehicle motion control unit that calculates a target track including a route and a velocity satisfying a predetermined riding comfort condition in the drivable area calculated by the driving plan calculation unit and controls the own vehicle so as to follow the target track.