Zone ECU Timing Synchronization for Distributed Vehicle Actuators
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Solution Overview
Problem
In vehicle automation systems, integrating arithmetic processing and control functions into a central processing unit leads to synchronization issues with actuators due to increased signal lines, resulting in timing deviations in lighting and buzzer operations across different units.
Innovation Solution
A vehicle control system is implemented where actuators are synchronously controlled through a network configuration with zone ECUs acting as hubs, using Ethernet for time synchronization and CAN-FD for asynchronous communication, allowing timing adjustments to ensure synchronized operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If control functions are integrated into a central processing unit, then device complexity is reduced and automation is improved, but synchronization precision of distributed actuators deteriorates due to different signal paths
Solution Approach 1:
The patent segments the control system into a central processing unit and multiple zone ECUs distributed throughout the vehicle. Each zone ECU is responsible for controlling actuators in its specific zone, which reduces the signal path length from the central unit to actuators and improves synchronization timing while maintaining the integrated control architecture.
Solution Approach 2:
The patent introduces zone ECUs as intermediary devices between the central processing unit and distributed actuators. These zone ECUs receive control signals from the central unit and relay them to actuators in their respective zones, thereby compensating for signal path differences and ensuring synchronized actuator operation.
2Manufacturing precision
If zone ECUs adjust blinking timing independently, then synchronization precision is improved, but device complexity increases due to timing adjustment mechanisms
Solution Approach 1:
The patent implements dynamic timing adjustment where zone ECUs can independently modify their blinking timing based on their distance from the central processing unit. This dynamic adjustment mechanism allows each zone ECU to compensate for signal transmission delays automatically, achieving synchronization without complex centralized timing control.
Solution Approach 2:
The patent applies preliminary timing adjustment where zone ECUs pre-calculate and set their blinking timing offsets based on their position in the network before actual operation begins. This preliminary configuration simplifies the runtime control logic while ensuring synchronized actuator operation throughout the vehicle.
Data Source
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AI summary
A vehicle control system includes a plurality of zone ECUs (2) and a central processing unit (10). Each zone ECU (2) outputs a blinking timing signal for blinking a blinker (L) installed in a vehicle (1) on the basis of a blinking control signal received from the central processing unit (10). Furthermore, the zone ECUs (2) are configured to be connected to each other via a local network, share blinking timing information of the blinker (L) with another zone ECU (2) via the local network, and adjust a blinking timing signal of the zone ECUs (2) on the basis of the shared information.