Steering Control Channel Switching for Redundant Communication
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Solution Overview
Problem
In redundancy systems for autonomous driving, the failure of a communication channel in a steering control device can lead to instability due to non-execution of steering assist control, necessitating quick and accurate determination and replacement of the failed channel.
Innovation Solution
A steering control device and method that analyzes the state of multiple communication channels, determines the most suitable channel for communication, and selects and uses it to maintain stability by switching to alternative channels if failures occur.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single communication channel is used for steering control data transmission, then the device complexity is reduced, but the reliability deteriorates when the channel fails
Solution Approach 1:
The communication channel is divided into multiple independent segments (first communication channel, second communication channel, third communication channel) that can operate independently. Each channel can be individually monitored and switched, allowing the system to maintain communication functionality even when one segment fails, thus improving reliability without requiring complete system redundancy.
Solution Approach 2:
The system performs preliminary monitoring of communication channel states continuously before failures occur. The controller detects communication states in advance and prepares alternative channels for immediate switching. This preliminary detection and preparation enables rapid response to channel failures, maintaining steering control reliability without adding complex manual intervention systems.
2Reliability
If multiple communication channels are implemented for redundancy, then the reliability improves, but the device complexity increases
Solution Approach 1:
Multiple communication channels are merged into a single integrated communication channel unit that is managed by one controller. The controller unifiedly monitors all channels and performs centralized switching decisions. This merging approach allows the system to benefit from multiple channels for reliability while avoiding the complexity of managing separate independent communication systems.
Solution Approach 2:
The communication channel unit is designed with multi-functionality, serving both as a primary communication path and as a redundant backup system. The same hardware infrastructure supports multiple communication channels that can be dynamically activated based on system needs, eliminating the need for separate dedicated redundant hardware and reducing overall device complexity.
3Loss of time
If real-time monitoring of communication channels is performed, then the detection speed improves, but the energy consumption increases
Solution Approach 1:
The communication state monitoring operates continuously without interruption to ensure immediate detection of channel failures. By maintaining constant monitoring of all communication channels, the system eliminates detection delays that would occur with periodic sampling, ensuring rapid response to failures while the controller manages the monitoring efficiently to minimize energy overhead.
Data Source
AI summary
The present embodiments relate to a steering control device and method. A steering control device and method according to the present embodiments may determine and use the most suitable communication channel for communication among different communication channels of the communication channel unit according to different states of communication channels in the communication channel unit connected to the plurality of control modules. Therefore, it is possible to improve communication reliability and increase stability by controlling data transmission and reception through another one or two or more communication channels even if a failure occurs in any one communication channel.