Vehicle Power Anomaly Control for Steering and Braking Actuators
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Solution Overview
Problem
Existing vehicle control systems may not ensure secure power supply when at least one of the multiple power sources fails, potentially leading to inadequate steering and braking forces during autonomous driving.
Innovation Solution
A vehicle control device with a monitoring unit that detects anomalies in primary and secondary power sources and switches power to drive devices with lower electrical power consumption to ensure safe operation, and further switches to higher power consumption devices when necessary for steering and braking forces, while providing guidance to the driver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the vehicle control system uses drive devices with higher electrical power consumption for autonomous driving control, then the steering force and braking force are sufficient, but the electrical power may become insufficient when a power source fails
Solution Approach 1:
The system dynamically switches between different drive devices based on real-time power source status and vehicle operating conditions. When power sources are normal, high-power devices provide sufficient steering and braking forces. When power source anomalies are detected, the system transitions to lower power consumption drive devices to ensure continuous operation and safe pull-over capability.
Solution Approach 2:
The control unit changes the operational parameters by selecting different drive devices with different power consumption characteristics. It monitors power source status and adjusts the power consumption level of the drive devices accordingly, switching between high-performance mode (sufficient force) and power-saving mode (lower consumption) to resolve the contradiction between force requirements and power availability.
2Use of energy by moving object
If the vehicle control system switches to drive devices with lower electrical power consumption when power source anomalies are detected, then electrical power is secured for safe pull-over, but the steering force and braking force may become insufficient
Solution Approach 1:
The system continuously monitors the status of power sources and vehicle operating conditions, providing feedback to the control unit. Based on this feedback, the control unit determines whether to switch between different drive devices. This closed-loop control ensures that the system maintains sufficient steering and braking forces while managing power consumption appropriately during power source anomalies.
Solution Approach 2:
The system dynamically adjusts the power consumption level of drive devices based on real-time conditions. When power source anomalies occur, it transitions to lower power consumption devices; when sufficient power is available or high performance is needed, it switches to higher power devices, making the system adaptable to varying operational requirements.
3Reliability
If the vehicle control system monitors power sources continuously and switches drive devices based on anomaly detection, then safe operation is ensured during power failures, but the control system complexity increases
Solution Approach 1:
The control unit serves multiple functions: it monitors power source status, detects anomalies, determines appropriate drive device selections, and executes switching control. This multi-functional design consolidates complexity into a single control unit rather than requiring separate systems for each function, thereby ensuring reliable operation during power failures while managing overall system complexity.
Solution Approach 2:
The system pre-establishes multiple drive device options with different power consumption characteristics and pre-programmes switching logic for various power source anomaly scenarios. This preliminary preparation allows the system to respond quickly and reliably to power failures without requiring complex real-time decision-making algorithms, thus enhancing reliability while controlling complexity.
Data Source
AI summary
A vehicle control device include a processor. The processor is configured to monitor a primary power source and a secondary power source for anomalies, the primary power source and the secondary power source supplying electrical power to a plurality of drive devices configured to control deceleration and steering of a vehicle, and in a case in which an anomaly has been detected in at least one of the primary power source or the secondary power source as a result of the monitoring, control the vehicle by supplying electrical power to a drive device having a lower electrical power consumption amount among the plurality of drive devices.