Automated Driving Control Under Log Storage Capacity Limits
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Solution Overview
Problem
The limited capacity of in-vehicle storage devices for log data in automated driving systems may lead to a strain, potentially preventing the recording of necessary data during critical events.
Innovation Solution
Adjusting control parameters such as acceleration limits, steering angular acceleration, maximum vehicle speed, and inter-vehicle distance when the storage device's free capacity falls below a threshold to restrict vehicle travel, thereby reducing the amount of log data generated.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If log data is continuously stored in the in-vehicle storage device, then the assessment capability of automated driving control is improved, but the storage capacity becomes strained
Solution Approach 1:
The system dynamically changes the control parameter (acceleration limit, steering angular acceleration, maximum vehicle speed, inter-vehicle distance) based on the remaining storage capacity. When storage capacity drops below a threshold, the control parameter is adjusted to restrict vehicle travel, thereby reducing log data generation and preventing storage strain while maintaining continuous operation
Solution Approach 2:
The control parameter is made dynamic rather than fixed. The automated driving control unit continuously monitors storage capacity and adjusts the control parameter in real-time. This dynamic adjustment allows the system to adapt to changing storage conditions, restricting travel when capacity is low and allowing normal operation when capacity is sufficient
2Quantity of substance
If the control parameter is adjusted to restrict vehicle travel, then the storage capacity strain is reduced, but the productivity of the vehicle decreases
Solution Approach 1:
The system implements periodic monitoring of storage capacity and periodic adjustment of control parameters. Rather than continuous restriction, the system checks storage capacity at intervals and only restricts travel when necessary. This periodic approach minimizes the impact on productivity while ensuring storage capacity is maintained
Solution Approach 2:
The control parameter is temporarily adjusted only when storage capacity falls below the threshold. When capacity recovers above the threshold, the control parameter returns to its normal value, restoring full vehicle travel capability. This conditional parameter change ensures productivity is maintained whenever possible
Data Source
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AI summary
An automated driving system (100) comprises one or more processors (110) configured to perform automated driving control of a vehicle (1) in accordance with a control parameter (122) and one or more storage devices (120). The automated driving system (100) stores log data (LOG) related to the automated driving control in the one or more storage devices (120) while performing the automated driving control. When a free capacity of the one or more storage devices (120) is less than a threshold value, the automated driving system (100) adjusts the control parameter (122) to restrict traveling of the vehicle (1).