Vehicle Control Device Task Switching for Redundant System Resource Utilization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Vehicle control devices with redundant configurations waste hardware resources as they do not utilize normally operating parts of failed systems, leading to inefficient resource allocation and potential safety risks.
Innovation Solution
A vehicle control device with an abnormal state-specific task executing unit that, upon detecting an abnormality in one system, stops unnecessary calculations and drive controls in that system, allowing the other system to take over functions and utilize its calculation capacity for other tasks, thereby optimizing resource use and enhancing safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a redundant configuration is implemented to improve reliability, then vehicle safety is improved, but hardware resources are wasted when the failed system's normally operating parts are not used
Solution Approach 1:
The patent enables the failed system's control variable calculation unit and drive control unit to perform multiple functions: their original control tasks and additionally executing other tasks from the failed system. This multi-functionality allows normally operating parts to be utilized, reducing hardware waste while maintaining redundancy for safety.
Solution Approach 2:
The system dynamically switches between normal operation mode and abnormal operation mode. When an abnormality is detected, the system automatically reassigns tasks from the failed system to the other system, making the resource allocation flexible and adaptive rather than static.
2Productivity
If the other system takes over functions from the failed system, then resource utilization is improved, but system complexity increases
Solution Approach 1:
The patent pre-arranges task assignment relationships between systems before failures occur. The abnormal state-specific task executing unit is pre-configured to know which tasks to execute when specific abnormalities are detected, eliminating the need for complex real-time decision-making algorithms and reducing system complexity.
Solution Approach 2:
The system automatically detects abnormalities and reassigns tasks without external intervention. The abnormal state-specific task executing unit autonomously determines when to switch to executing other tasks, reducing the need for complex external control mechanisms.
Data Source
AI summary
Provided is a vehicle control device which makes it possible, in a redundant configuration, to make use of a normally operating part in a failed system. A vehicle control device having a redundant configuration includes a task switching function unit configured to switch tasks to be executed when an abnormality is detected. The task switching function unit being configured to, when a diagnostic function unit determines that an abnormality has occurred in a unit of a host system, cause the unit of the failed system to stop calculation of control variable, and stop drive control for a control object, and then execute calculation other than the calculation of the control variable of the host system, and the drive control for an electric motor, so that the calculation unit of the failed system can take over at least a part of calculation of a normal system or another on-vehicle device.