Vehicle Actuator Control for Low-Latency Request Arbitration
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Solution Overview
Problem
The provision of multiple driving assistance devices in a vehicle can lead to increased communication times and processing delays, which negatively impact the responsiveness of the driving assistance functions due to the use of an intermediate processing device like a movement manager device.
Innovation Solution
The vehicle control system directly acquires request signals from driving assistance devices through a single communication on the in-vehicle network, allowing the actuator control device to select the latest request signal based on predetermined rules, thereby reducing control delays and improving responsiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a movement manager device is provided as an intermediate processing device between driving assistance devices and actuator control devices, then the arbitration function can be implemented to select request signals, but the communication time and processing time increase, leading to reduced responsiveness
Solution Approach 1:
The patent extracts the arbitration function from a separate movement manager device and integrates it into the actuator control device itself. The actuator control device now directly receives request signals from multiple driving assistance devices, extracts the identifier to determine which request signal to use, and selects the appropriate control signal without requiring an intermediate movement manager device. This eliminates the additional communication time and processing time associated with the movement manager device while maintaining the arbitration function.
2Adaptability or versatility
If multiple driving assistance devices are mounted in the vehicle, then the driving assistance function is enhanced, but the control delay increases due to sequential communication and arbitration processing
Solution Approach 1:
The patent merges the arbitration processing function into the actuator control device, combining the receiving of request signals, identifier extraction, and control signal selection into a single integrated unit. This eliminates the need for separate communication cycles between the movement manager device and actuator control device, reducing control delay while supporting multiple driving assistance devices with enhanced functionality.
3Adaptability or versatility
If request signals are transmitted through the movement manager device, then the system can manage multiple driving assistance devices, but the number of communication steps increases from one to two, reducing response performance
Solution Approach 1:
The actuator control device performs self-service by directly receiving request signals from multiple driving assistance devices, extracting identifiers to determine which request to prioritize, and selecting control signals autonomously. This eliminates the need for the movement manager device to mediate the communication, reducing the number of communication steps from two to one while maintaining the ability to manage multiple driving assistance devices effectively.
Data Source
AI summary
A vehicle control system includes a plurality of driving assistance devices configured to sequentially send request signals including requests to an actuator in the vehicle and identifiers of the driving assistance devices to an in-vehicle network, a movement manager device configured to acquire the request signals from the in-vehicle network, select one of the identifiers respectively included in the acquired request signals based on a predetermined rule, and sequentially send a control signal including at least the selected identifier to the in-vehicle network, and an actuator control device configured to sequentially acquire the request signal and the control signal from the in-vehicle network, when the control signal is acquired, select a latest request signal including the identifier included in the acquired latest control signal among the acquired request signals, and decide a control value of the actuator based on the request included in the selected request signal.