Vehicle Actuator Feedback Bypass for Arbitration Unit Failures
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Solution Overview
Problem
Existing vehicle control systems fail to reliably feed back the state of actuators to application execution units when the arbitration function unit is abnormal, leading to potential signal delays and compromised controllability.
Innovation Solution
A vehicle control device and method that includes a controller, request arbitration unit, and request generation unit, where the controller detects abnormalities in the request arbitration unit and directly transmits actuator state information to application execution units, bypassing the arbitration unit in case of failures, ensuring timely feedback of actuator states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the arbitration function unit is used to relay transmission and reception of signals between application execution units and actuators, then the system can manage multiple applications and actuators centrally, but when the arbitration unit fails, it becomes impossible to feed back the state of each actuator to the application
Solution Approach 1:
The feedback path is segmented into two independent channels: one through the arbitration unit for normal operation, and another direct path from the actuator to the application execution unit for failure scenarios. This segmentation ensures that failure in one channel does not completely disrupt feedback functionality.
Solution Approach 2:
The system dynamically changes the feedback path parameter based on the operational state of the arbitration unit. When the arbitration unit is functioning normally, feedback flows through it; when it fails, the feedback path switches to the direct connection, changing the system's topological parameter to maintain reliability.
2Ease of operation
If the arbitration function unit is used to arbitrate requests from multiple applications, then request management becomes centralized, but signal delays may occur when the arbitration unit is abnormal
Solution Approach 1:
The system establishes a direct feedback path in advance, before any failure occurs. This preliminary action ensures that when the arbitration unit fails, the feedback can immediately use the pre-existing direct path without delay, rather than needing to reconfigure the system under failure conditions.
Solution Approach 2:
The feedback system is made dynamic by allowing the feedback path to switch between two configurations based on the arbitration unit's operational status. This dynamic adaptability enables the system to optimize for either centralized management or rapid feedback depending on conditions.
3Loss of information
If all state information passes through the arbitration function unit, then centralized monitoring is achieved, but the load on the communication infrastructure increases and reliability decreases
Solution Approach 1:
The critical actuator state information is extracted from the centralized arbitration path and routed directly to the application execution unit. This extraction reduces the load on the arbitration unit and communication infrastructure while ensuring that essential information reaches its destination reliably and efficiently.
Data Source
AI summary
A vehicle control device includes a controller configured to control an actuator and generate state information representing a state of the actuator, a request arbitration unit configured to arbitrate requests from a plurality of application execution units, and a request generation unit configured to generate a drive request signal to the controller. The controller includes a detection unit configured to detect whether or not the request arbitration unit is abnormal, a first transmission unit configured to transmit the state information to the request arbitration unit, and a second transmission unit configured to, when the detection unit detects that the request arbitration unit is abnormal, transmit the state information to the application execution units such that the state information does not pass through the request arbitration unit.