Steering Control Abnormality Detection via Estimated Instruction Comparison
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Solution Overview
Problem
Existing automatic steering control systems fail to detect abnormalities in steering operations promptly, leading to delayed shifting to manual control, which can cause vehicle behavior disturbances.
Innovation Solution
An automatic steering control apparatus that includes a steering controller and a steering instruction unit, which calculates and compares current and estimated instruction values based on surrounding conditions and map information to detect abnormalities and initiate fail-safe control measures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the system uses only current surrounding condition recognition to control steering, then the steering control is simple and responsive, but abnormalities in steering operations cannot be detected promptly
Solution Approach 1:
The system calculates and stores estimated instruction values in advance based on current surrounding conditions and map information, before actual steering execution. These pre-calculated values serve as reference benchmarks for later abnormality detection when comparing against actual steering instructions
Solution Approach 2:
The system continuously compares the actual steering instruction values with the pre-stored estimated instruction values, creating a feedback mechanism that detects deviations indicating abnormalities. This feedback loop enables prompt abnormality detection without fundamentally changing the basic steering control structure
2Measurement precision
If the system stores and compares historical estimated instruction values, then abnormality detection precision is improved, but information processing load increases
Solution Approach 1:
The system extracts only the essential estimated instruction values from historical data for storage and comparison, rather than processing complete steering datasets. This selective extraction reduces information processing load while maintaining sufficient precision for abnormality detection
Solution Approach 2:
The system changes the parameter representation from complete steering instruction sets to simplified estimated instruction values that capture the essential steering trajectory information. This parameter transformation reduces data volume and processing requirements while preserving detection accuracy
Data Source
AI summary
An automatic steering control apparatus includes a steering controller and a steering instruction unit. The steering controller includes a storage, an instruction value checking unit, and a steering control unit, and controls operation of a steering device of a vehicle. The steering instruction unit includes an instruction value calculator and an estimated instruction value calculator, and outputs an instruction value to the steering controller. The instruction value calculator calculates a latest course and calculates the instruction value. The estimated instruction value calculator calculates a future course and calculates an estimated instruction value. The storage stores the estimated instruction value acquired from the estimated instruction value calculator during a past predetermined period. The instruction value checking unit determines whether an abnormality is present in the steering instruction unit by comparing the instruction value for a current point and the estimated instruction value corresponding to the current point.