Vehicle Integrated Control Arbitration for Reliability
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Solution Overview
Problem
Conventional vehicle integrated control apparatuses face reliability issues due to information overload and potential abnormalities in the host command section affecting sub-command sections, leading to increased information exchange and reduced reliability.
Innovation Solution
A vehicle integrated control apparatus with driving support calculation control, driving amount calculation control, and braking amount calculation control means that calculates and arbitrates target control amounts to reduce information exchange, enhance reliability, and enable autonomous control of driving and braking forces based on driver inputs, while preventing abnormal influences from the driving support calculation control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a host command section and sub-command sections are used for integral control, then vehicle motion control capability is improved, but the amount of information exchange increases and reliability decreases
Solution Approach 1:
The patent extracts the arbitration function from the host command section and places it in a dedicated arbitration device. This separation removes the information processing burden from the host command section, reducing the amount of information that needs to be exchanged between control sections while maintaining the integral control capability for multiple vehicle motion controls.
2Adaptability or versatility
If a host command section and sub-command sections are used for integral control, then vehicle motion control capability is improved, but reliability decreases due to abnormality propagation
Solution Approach 1:
The patent segments the control system into independent control sections, each with its own arbitration capability. This segmentation isolates abnormalities within individual sections, preventing them from propagating to other sections. Each section can independently arbitrate its own control commands, ensuring that a failure in one section does not compromise the entire system's reliability.
Solution Approach 2:
The patent introduces an arbitration device as an intermediary between the host command section and sub-command sections. This intermediary processes and arbitrates control commands, acting as a buffer that prevents direct abnormality propagation between sections. The arbitration device ensures that even if one section experiences abnormalities, the other sections can continue to function reliably.
3Measurement precision
If multiple control sections exchange detailed information for arbitration, then control precision is improved, but information exchange volume increases
Solution Approach 1:
The patent extracts only the essential arbitration-related information from detailed control data. Instead of exchanging complete control command sets between sections, each section extracts and transmits only the critical parameters needed for arbitration decisions. This reduction in information volume maintains control precision while significantly decreasing the amount of data exchanged between control sections.
Data Source
AI summary
A driving support target braking/driving force is calculated by a driving support electronic controller, and transmitted to a first arbiter of a driving force control electronic controller. A vehicle driver requested target braking/driving force and the driving support target braking/driving force are arbitrated by the first arbiter, whereby a vehicle total target braking/driving force is calculated, and the vehicle total target braking/driving force is distributed to a vehicle target driving force and a vehicle target braking force by a braking/driving force distributor. A final target driving force is calculated by a second arbiter on the basis of the target driving force, and a driver requested braking force and the target braking force are arbitrated by an arbiter of a braking force control electronic controller, whereby a vehicle total target braking force is calculated.