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 a motion request with a different physical quantity, and output the actual steering wheel angle to actuator systems, thereby improving steering control without the need for individual derivation processes by each device.
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 development cost increases and the system complexity increases
Solution Approach 1:
The patent merges the steering wheel angle derivation function from multiple driver assistance devices into a single central management device. This central device receives steering wheel angle information from sensors and distributes it to all driver assistance devices that need it, eliminating the need for each device to independently derive the angle and thereby reducing system complexity while maintaining steering control capability.
Solution Approach 2:
The central management device serves multiple driver assistance devices simultaneously, providing the actual steering wheel angle to any device that requests it. This universal approach allows one device to perform the function that previously required multiple devices, reducing overall system complexity.
2Adaptability or versatility
If multiple driver assistance devices individually derive the actual steering wheel angle, then each device has independent control capability, but development costs increase
Solution Approach 1:
The patent combines the derivation functionality into a shared central resource that all driver assistance devices can access. This eliminates redundant development efforts across multiple devices while maintaining the adaptability and control capability of each individual device through centralized information distribution.
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 central management device acts as an intermediary between the steering wheel angle sensor and the driver assistance devices. It receives the actual steering wheel angle information from the sensor and distributes it to devices that need it for accurate control, while maintaining system simplicity through centralized management rather than requiring direct connections between sensors and multiple devices.
4Ease of operation
If driver assistance devices use target control amounts without actual feedback, then control simplicity is maintained, but control stability deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the actual steering wheel angle is continuously measured and provided to driver assistance devices. This feedback allows devices to compare target control amounts with actual values and make necessary adjustments, improving control stability while maintaining operational simplicity through automated feedback processing.
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.