Vehicle Turning Torque Compensation for Slip-Stable Steering
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle control methods, such as torque vectoring and G-vectoring, face challenges in maintaining consistent steering stability and responsiveness during turning, particularly due to understeer and oversteer tendencies, and are influenced by varying road conditions and driving environments.
Innovation Solution
A vehicle control method that calculates first compensation torque based on lateral acceleration and second compensation torque to prevent wheel slip, using a turning control apparatus with a first compensator and a second compensator to adjust demanded torque, thereby improving steering characteristics and stability during turns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If torque vectoring or G-vectoring control methods are used, then steering responsiveness is improved, but steering stability becomes inconsistent under varying road conditions
Solution Approach 1:
The control system dynamically adjusts the torque compensation strategy based on real-time detection of wheel slip conditions and lateral acceleration variations. The controller switches between different compensation modes (first compensation torque for lateral acceleration control, second compensation torque for wheel slip prevention) to maintain optimal steering stability across varying road conditions while preserving steering responsiveness.
Solution Approach 2:
The system changes control parameters (compensation torque values) based on detected vehicle behavior deviations. When wheel slip is detected, the controller applies second compensation torque to adjust the demanded torque, thereby changing the control parameters to maintain steering stability consistency under different road conditions.
2Speed
If first compensation torque is applied based on lateral acceleration variation, then steering responsiveness is enhanced, but wheel slip may occur under certain driving conditions
Solution Approach 1:
The control system continuously monitors actual vehicle behavior (lateral acceleration, wheel slip conditions) and feeds this information back to the controller. Based on the feedback, the controller determines whether to apply first compensation torque (for responsiveness) or second compensation torque (to prevent wheel slip), thereby resolving the contradiction between steering responsiveness and wheel slip prevention.
Solution Approach 2:
The controller proactively applies second compensation torque when wheel slip conditions are detected or anticipated, preventing the harmful effect of wheel slip before it significantly degrades vehicle control. This preliminary anti-action works in conjunction with the first compensation torque to maintain both responsiveness and prevent harmful effects.
3Stability of the object's composition
If demanded torque is adjusted to prevent understeer and oversteer, then vehicle stability is improved, but control complexity increases
Solution Approach 1:
The control system is segmented into distinct functional components: a first compensator for calculating compensation torque based on lateral acceleration variation, and a second compensator for calculating compensation torque based on wheel slip prevention. This segmentation allows each component to handle specific aspects of stability control, making the overall complex control task more manageable and implementable.
Data Source
AI summary
A vehicle and a method of controlling turning thereof are provided. The turning control method of a vehicle includes calculating first compensation torque based on a lateral acceleration variation during turning, determining first compensated demanded torque by applying the first compensation torque to demanded torque, determining second compensation torque for preventing wheel slip of a driving wheel based on the first compensated demanded torque and an actual vehicle behavior, and determining second compensated demanded torque input to a driving source controller by applying the second compensation torque to the first compensated demanded torque.