Vehicle Behavior Control for Crosswind Compensation and Driver Intent
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Solution Overview
Problem
Conventional motor driven power steering systems fail to effectively compensate for excessive lateral forces, such as cross-winds above 40 KPH, and do not consider user intention, leading to unnecessary control interventions and a sense of heterogeneity during vehicle travel.
Innovation Solution
A device and method that utilize sensors to identify vehicle and user intentions, calculate braking and steering control amounts, and perform compensation only when necessary, considering parameters like lateral force, travel state, and user input to stabilize vehicle behavior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional steering torque compensation control is performed based on lateral force generation, then vehicle stability is improved under normal conditions, but the compensation effect is insufficient when excessive lateral force (cross-wind ≥ 40 KPH) occurs
Solution Approach 1:
The system dynamically adjusts the compensation control strategy based on real-time detection of lateral force magnitude. When excessive lateral force is detected (cross-wind ≥ 40 KPH), the system transitions from conventional steering torque compensation to integrated braking and steering control, optimizing the compensation effect under extreme conditions
Solution Approach 2:
The system changes control parameters based on lateral force conditions. Under normal conditions, only steering torque compensation is applied. When excessive lateral force occurs, the system activates additional braking control parameters in combination with steering control to achieve sufficient compensation
2Reliability
If compensation control is performed based on lateral force generation without considering user intention, then vehicle stability is improved, but unnecessary control interventions occur and user experience deteriorates
Solution Approach 1:
The system continuously monitors user steering input and intention through feedback mechanisms. By detecting whether the user is actively steering or maintaining a hands-off state, the system determines whether compensation control should be activated, ensuring control is only applied when genuinely needed and not interfering with user intent
Solution Approach 2:
The system performs preliminary detection of user intention before executing compensation control. By analyzing steering torque, steering angle, and temporal patterns, the system proactively determines user intent and prevents unnecessary interventions, allowing natural user operations to proceed undisturbed
3Reliability
If maximum steering torque compensation is applied to counteract excessive lateral force, then vehicle stability is improved, but the compensation amount (0.4 Nm) is insufficient for the required level (≥ 2 Nm)
Solution Approach 1:
The system merges braking control with steering control to create a combined compensation mechanism. By coordinating brake force application with steering torque, the system achieves a synergistic effect that provides sufficient total compensation (≥ 2 Nm) for excessive lateral forces, overcoming the limitation of steering torque alone (0.4 Nm)
Data Source
AI summary
A device for controlling a behavior of a vehicle identifies sensing data including at least one of a travel state of a host vehicle, an operation signal for the host vehicle, a lateral force acting on the host vehicle caused by cross-wind, or any combination using a sensor. The device also identifies an intention determination value related to an intention of a user using at least some of the sensing data. The device also identifies at least one of a braking control amount, a steering control amount for the host vehicle, or any combination using at least some of the sensing data when the sensing data and the intention determination value satisfy specified conditions. The device also compensates for a behavior of the host vehicle based on the braking control amount, the steering control amount, or any combination.