Vehicle Driving Control System for Abnormal Driver State
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Solution Overview
Problem
Existing driving control systems for vehicles do not effectively prevent contact with objects or lane departure when a driver is in an abnormal state, especially in vehicles without surrounding information acquisition devices like radar or CCD cameras, as they fail to consider driver abnormalities and cannot adjust steering operations independently.
Innovation Solution
A driving control system that includes a steering device, a steering operation amount sensor, an abnormality determining device, and an electronic control unit to adjust the vehicle's turning state quantity without relying on the driver's operation, by calculating a target turning state quantity and correcting it to stay within a predetermined allowable range to prevent lane departure and contact with objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the driving control system uses radar or CCD camera to acquire surrounding information and determine contact likelihood, then the accuracy of collision avoidance is improved, but the device complexity and cost increase
Solution Approach 1:
The invention extracts and utilizes existing vehicle data (steering operation amount from steering angle sensor, vehicle speed, braking status) that is already being collected for normal driving operations. By repurposing these existing data streams for abnormal state detection and collision risk assessment, the system achieves accurate measurement without adding radar or CCD camera hardware.
Solution Approach 2:
The steering operation amount sensor and other vehicle sensors serve multiple functions: normal steering assistance, abnormal state detection, and collision risk assessment. This multi-functionality allows the system to achieve sophisticated safety monitoring without requiring dedicated specialized devices for each function.
2Stability of the object's composition
If the electronic control unit calculates and corrects the target turning state quantity to stay within an allowable range, then the vehicle's stability is improved, but the responsiveness to legitimate driver steering operations may be reduced
Solution Approach 1:
The system dynamically adjusts the degree of correction applied to the target turning state quantity based on the driver's state. When the driver is normal, minimal correction is applied to maintain responsiveness. When the driver is in an abnormal state, stronger correction within the allowable range is applied to ensure stability. This dynamic adaptation resolves the contradiction between stability and responsiveness.
Solution Approach 2:
The allowable range of target turning state quantity is adjusted as a parameter based on vehicle conditions (speed, road gradient, traffic状况). At high speeds, the allowable range is narrower to maintain stability, while at low speeds, the range is wider to allow faster maneuvering. This parameter adaptation allows the system to maintain both stability and responsiveness under different operating conditions.
Data Source
AI summary
A driving control system for a vehicle is provided. The vehicle includes a steering device, a steering operation amount sensor that detects a steering operation amount of the driver, and an abnormality determining device configured to determine whether the driver is in an abnormal state. The driving control system includes: an actuator configured to adjust a turning state quantity; and an electronic control unit configured to calculate a target turning state quantity of the vehicle based on the steering operation amount and control the turning state quantity adjusting device. The electronic control unit is configured to correct the target turning state quantity such that a magnitude of the target turning state quantity does not exceed a predetermined allowable range and to control the actuator based on the corrected target turning state quantity when the driver is in the abnormal state.