Oversteer Mitigation via Curve Geometry Analysis
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Solution Overview
Problem
Existing vehicle systems often unnecessarily mitigate oversteer conditions, leading to reduced driving speeds and a degraded driver experience, especially when navigating curves, as they fail to differentiate between safe and unsafe oversteer scenarios based on road geometry and driver intent.
Innovation Solution
A vehicle system equipped with sensors and an oversteer mitigation sub-system that analyzes sensor data to identify curves and determine whether to allow or mitigate oversteer conditions, selectively applying driver-assisted techniques like braking and load rebalancing based on road geometry, driver intent, and environmental factors to enhance performance and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the oversteer mitigation sub-system always mitigates oversteer conditions, then vehicle stability is improved, but driving speed and driver experience deteriorate
Solution Approach 1:
The system applies different mitigation strategies to different wheels based on their individual slip angles and local road conditions. The oversteer mitigation sub-system selectively applies braking force to specific wheels rather than uniformly mitigating all oversteer conditions, allowing controlled oversteer in safe scenarios while maintaining stability when necessary.
Solution Approach 2:
The system dynamically adjusts the level of oversteer mitigation based on real-time sensor data, road geometry, and environmental conditions. The control algorithm continuously modifies mitigation intensity, allowing the vehicle to transition between stable and controlled oversteer states, thereby optimizing both safety and performance.
2Reliability
If the oversteer mitigation sub-system intervenes in all oversteer conditions, then safety is improved, but driver intent and performance deteriorate
Solution Approach 1:
The system incorporates feedback from multiple sensors including steering angle sensors, acceleration sensors, and road condition sensors to continuously monitor driver intent and vehicle state. This feedback loop allows the system to distinguish between intentional oversteer maneuvers and unsafe conditions, adjusting mitigation accordingly to respect driver intent while maintaining safety.
Solution Approach 2:
The system changes operational parameters such as braking force distribution and mitigation intensity based on detected road conditions, vehicle dynamics, and inferred driver intent. By dynamically adjusting these parameters, the system adapts to different driving scenarios, allowing performance-oriented driving on suitable roads while maintaining safety constraints.
3Productivity
If sensor data analysis is used to differentiate safe and unsafe oversteer scenarios, then driving performance is improved, but system complexity increases
Solution Approach 1:
The oversteer mitigation sub-system integrates multiple sensor inputs and control functions into a single unified system. The same sensor data analysis framework is used for multiple purposes including road geometry detection, slip angle calculation, driver intent recognition, and safety assessment, reducing overall system complexity through functional integration.
Solution Approach 2:
The system performs preliminary analysis of sensor data to predict road geometry and potential oversteer scenarios before they occur. By pre-processing sensor inputs and establishing baseline safety parameters, the system reduces the computational complexity required during active oversteer events, improving response time while managing system complexity.
Data Source
AI summary
Apparatuses, systems, and methods relate to technology to control one or more systems to mitigate an oversteer condition of a vehicle or allow the oversteer condition, identify a curve in a roadway based on sensor data associated with the vehicle, based on the curve in the roadway, conduct an identification that the oversteer condition is to be allowed for at least a portion of the curve, and in response to the identification that the oversteer condition is to be allowed, controlling the one or more systems to allow the oversteer condition for the at least the portion of the curve.