Vehicle Crosswind Control Using Braking and Steering Torque
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Solution Overview
Problem
Existing vehicle control systems fail to effectively detect and counteract crosswind effects when a vehicle is turning, leading to potential lane deviation and increased risk of accidents, particularly in SUVs and VANs, due to false crosswind detection and inadequate steering compensation.
Innovation Solution
A vehicle control apparatus and method that utilizes sensors to detect crosswind conditions while turning, calculating partial braking and compensation steering torques to stabilize the vehicle by comparing actual yaw rates and transverse accelerations with reference values, and adjusting braking and steering to counteract crosswind effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If crosswind detection is performed only when the vehicle is traveling straight, then false detection is reduced, but crosswind detection capability during turning is lost
Solution Approach 1:
The system dynamically adjusts crosswind detection based on vehicle operating conditions. It determines whether the vehicle is turning using steering angle sensors and only performs crosswind detection when the vehicle is traveling straight, thereby adapting the detection process to current driving conditions to avoid false detections while maintaining detection capability when appropriate
Solution Approach 2:
The system changes the detection parameters based on vehicle state. By monitoring steering angle and determining vehicle trajectory, the system modifies whether crosswind detection is activated, effectively using parameter changes in detection activation based on whether the vehicle is turning or traveling straight
2Device complexity
If only yaw rate comparison is used for crosswind detection, then detection simplicity is maintained, but false detection frequency increases
Solution Approach 1:
The crosswind detection process is segmented into multiple independent checks: first determining whether the vehicle is turning using steering angle, then comparing yaw rate with reference values, and finally comparing transverse acceleration with reference values. Only when all conditions are satisfied is crosswind detected, dividing the detection into separate verification stages to reduce false positives
Solution Approach 2:
The system uses feedback from multiple sensors including steering angle sensors, yaw rate sensors, and transverse acceleration sensors to continuously monitor vehicle state and adjust detection decisions. The reference yaw rate and reference transverse acceleration are compared with actual values to provide feedback that confirms or refutes crosswind presence
3Device complexity
If only partial braking control is applied in response to crosswind, then system simplicity is maintained, but lane departure prevention effectiveness is reduced
Solution Approach 1:
The system merges two control actions: partial braking control and steering control. When crosswind is detected, the controller simultaneously applies partial braking to generate yaw moment and activates steering control to compensate for steering angle deviation, combining multiple control mechanisms to achieve better lane departure prevention
Solution Approach 2:
The control system acts as a composite control mechanism combining braking system and steering system. By integrating both partial braking control and steering control in response to crosswind, the system creates a composite control approach that leverages both systems' capabilities for more effective vehicle stabilization
Data Source
AI summary
Disclosed herein are an apparatus and method for controlling a vehicle. The apparatus for controlling a vehicle includes a sensor unit configured to output a signal corresponding to behavior information on a vehicle and a signal corresponding to information on an external environment of the vehicle, a controller configured to calculate a crosswind tendency including information on a strength and a direction of a crosswind applied to the vehicle based on the signal received from the sensor unit, calculate a partial braking torque for compensating for a pulling caused by the crosswind based on the crosswind tendency, and calculate a compensation steering torque for compensating for a steering angle deviation based on the partial braking torque, a braking unit configured to perform partial braking of the vehicle by outputting the partial braking torque, and a steering unit configured to perform steering of the vehicle by outputting the compensation steering torque.