Vehicle Steering Middle-Point Synchronization Across Drive Assist Systems
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Solution Overview
Problem
Driver assistance devices in vehicles may experience fluctuations in the middle point for steering control when switching between different assistance systems, leading to an uncomfortable driving experience due to inconsistent updates of the middle point.
Innovation Solution
A vehicle control device with processors that receive and arbitrate requests from multiple driver assistance systems, calculate a unified motion request, and distribute it to actuator systems, while providing update information to ensure synchronized updating of the middle point among all driver assistance devices at optimal times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If driver assistance devices update the middle point independently at different timings, then each device can maintain its own control precision, but the middle point fluctuates when control is switched between devices, causing uncomfortable vehicle behavior
Solution Approach 1:
The patent merges the independent middle point update operations of multiple driver assistance devices into a unified update mechanism. The manager coordinates update timings across devices, ensuring they update the middle point simultaneously based on unified correction amounts, thereby maintaining precision while eliminating fluctuations during control switching.
Solution Approach 2:
The system implements feedback mechanisms where the manager receives detection results from acceleration sensors, calculates correction amounts, and distributes them to driver assistance devices. This feedback loop ensures all devices update the middle point consistently based on actual vehicle behavior, maintaining both precision and stability.
2Measurement precision
If the middle point is updated frequently to maintain precision, then control accuracy improves, but the complexity of coordinating updates across multiple devices increases
Solution Approach 1:
The patent introduces a manager as an intermediary device that coordinates middle point updates across multiple driver assistance devices. The manager centralizes the calculation of correction amounts based on acceleration sensor data and distributes unified update instructions to all devices, simplifying the coordination complexity while maintaining high update frequency and precision.
Solution Approach 2:
The manager performs multiple functions: it arbitrates control requests from different driver assistance devices, calculates middle point correction amounts, determines optimal update timings, and distributes update instructions. This multi-functionality consolidates the complexity into a single device while enabling precise and coordinated updates across the system.
Data Source
AI summary
A vehicle comprises a plurality of drive assist devices configured to implement a plurality of drive assist functions, respectively. The plurality of drive assist devices includes a first drive assist device, which includes an update information generation device configured to generate update information to update a middle point in steering control performed by at least one of the drive assist devices, and a second drive assist device which does not include the update information generation device. The update information generation device in the first drive assist device generates the update information when the first drive assist device receives a notification that permits updating the middle point. The second drive assist device receives the update information from the first drive assist device when the second drive assist device receives the notification.