Vehicle Steering Request Arbitration With Actual Angle Feedback
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Solution Overview
Problem
Existing vehicle driver assistance systems face limitations in acquiring and utilizing the actual steering wheel angle for improved steering control, leading to suboptimal performance and increased development costs due to individual derivation processes by multiple driver assistance devices.
Innovation Solution
A control device and method that includes processors to receive and arbitrate control requests from various driver assistance applications, calculate and distribute motion requests, and output the actual steering wheel angle to actuator systems, thereby eliminating the need for individual derivation processes and enhancing steering control accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple driver assistance devices individually derive the actual steering wheel angle, then each device can perform steering control, but the device complexity and development costs increase
Solution Approach 1:
The patent merges the steering wheel angle derivation function into a single arbitration device that centralizes the calculation of actual steering wheel angle from vehicle movement state. Multiple driver assistance devices no longer need to individually derive this parameter; instead, they receive it from the arbitration device, reducing overall system complexity while maintaining steering control capability.
Solution Approach 2:
The arbitration device serves multiple functions: it arbitrates between conflicting driver assistance requests and simultaneously provides the actual steering wheel angle to all driver assistance devices. This multi-functional approach eliminates the need for each device to have its own derivation capability, reducing redundancy.
2Ease of operation
If each driver assistance device performs individual derivation of steering wheel angle, then steering control can be implemented, but processing load and development costs increase
Solution Approach 1:
The arbitration device performs the derivation of actual steering wheel angle from vehicle movement state itself, rather than requiring each driver assistance device to perform this derivation independently. This self-service approach by the arbitration device reduces the processing load on individual driver assistance devices while maintaining ease of steering control operation.
3Device complexity
If the actual steering wheel angle is not provided to driver assistance devices, then system complexity is reduced, but steering control accuracy deteriorates
Solution Approach 1:
The arbitration device acts as an intermediary that derives the actual steering wheel angle from vehicle movement state and provides it to driver assistance devices. This intermediary approach maintains steering control accuracy by ensuring all devices receive the same precise angle information without requiring each device to have its own derivation capability.
Data Source
AI summary
A control device mounted on a vehicle including one or more processors. The one or more processors are configured to receive a plurality of first requests from a driver assistance system. The one or more processors are configured to arbitrate the first requests. The one or more processors are configured to calculate a second request that has a physical quantity different from that of the first request, based on an arbitration result. The one or more processors are configured to distribute the second request to at least one of a plurality of actuator systems. The one or more processors are configured to output an actual steering angle of the vehicle to the driver assistance system.