Vehicle Drift Control Using Torque Split and Steering Compensation
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Solution Overview
Problem
Existing vehicle drift control systems rely heavily on driver proficiency, making it difficult to achieve consistent and controlled drift maneuvers due to limitations in torque adjustment and tire force distribution, especially during large side accelerations.
Innovation Solution
A vehicle drift control method and apparatus that acquires slip rate and steering information, determines target drift parameters, and adjusts front axle torque, rear axle torque, and rear wheel brake torque to control vehicle drift, using PID closed-loop control for steering compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If driver manually operates accelerator, steering and brake for vehicle drift, then driver proficiency determines drift quality, but consistency and controllability of drift maneuvers deteriorate
Solution Approach 1:
The system enables self-service drift control by automatically calculating target drift parameters (yaw rate, slip angle, torque distribution) based on driver input, and autonomously adjusting front axle torque, rear axle torque, and rear wheel brake torque to achieve consistent drift maneuvers without requiring manual coordination of multiple controls
Solution Approach 2:
The system implements feedback control by continuously monitoring actual vehicle state (yaw rate, slip angle, wheel speeds) and adjusting torque and brake outputs to match target drift parameters, ensuring consistent and controllable drift performance across varying conditions
2Stability of the object's composition
If torque distribution control is limited during drift, then vehicle stability is maintained, but ability to achieve and maintain drift state deteriorates
Solution Approach 1:
The system dynamically adjusts torque distribution between front and rear axles based on real-time vehicle state and target drift parameters, allowing the vehicle to transition from stable driving to controlled drift and maintain drift state through continuous adaptation of torque outputs
Solution Approach 2:
The system changes key vehicle dynamics parameters (front axle torque, rear axle torque, rear wheel brake torque) to achieve and maintain drift state, while using PID control to keep other parameters (yaw rate, slip angle) within target ranges for controlled maneuverability
3Device complexity
If steering compensation is not provided during drift, then system complexity is reduced, but steering precision and drift control quality deteriorate
Solution Approach 1:
The power-assisted steering motor acts as an intermediary that automatically provides steering compensation based on calculated target values, eliminating the need for manual steering adjustments while maintaining high steering precision through automated control
Data Source
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AI summary
The disclosure provides a vehicle drift control method and apparatus, a vehicle, a storage medium and a chip in the technical field of vehicle control. The method includes: acquiring (S11) a slip rate level and steering information of the vehicle; determining (S12) a target yaw rate according to the slip rate level, the steering information and a current vehicle velocity of the vehicle; determining (S13) a steering compensation quantity according to the target yaw rate of the vehicle; determining (S14) front axle torque, rear axle torque and rear wheel brake torque of the vehicle according to the steering compensation quantity; and controlling (S15) the vehicle to drift according to the front axle torque, the rear axle torque and the rear wheel brake torque, and controlling a power-assisted steering motor to perform steering compensation according to the steering compensation quantity and the vehicle velocity in the drift mode.