Vehicle Acceleration Slip Control With Predictive Wheel Torque
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Solution Overview
Problem
Traction control systems (TCS) fail to activate torque reduction promptly when driving wheels skid at the start of vehicle movement, leading to inaccurate and delayed anti-slip driving due to the threshold-based activation mechanism.
Innovation Solution
A method for vehicle acceleration slip regulation that predicts a target wheel torque based on current and previous motor state information, including vehicle speed, accelerator pedal opening degree, and motor output torque, to determine a torque control value and adjust motor torque accordingly, ensuring timely and accurate slip regulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the target drive shaft speed is set slightly greater than the reference vehicle speed when the vehicle is stationary to prevent false triggering, then the TCS robustness is improved, but the response time of torque reduction is delayed
Solution Approach 1:
The system performs preliminary action by predicting the target wheel torque before actual wheel slip occurs. The prediction module uses motor state information from current and previous moments to forecast the torque that would cause slip, enabling the TCS to activate torque reduction proactively rather than reactively when slip threshold is exceeded. This resolves the contradiction by maintaining robustness through predictive control while eliminating the delay caused by threshold-based activation.
Solution Approach 2:
The system implements feedback by continuously monitoring motor state information (rotational speed, output torque) from both current and previous moments, comparing predicted torque with actual motor output, and adjusting the torque reduction control accordingly. This closed-loop feedback mechanism ensures reliable slip prevention while achieving rapid response by using real-time state differences to trigger timely torque adjustment.
2Reliability
If the TCS activates torque reduction only when skid amount exceeds a certain threshold, then false triggering is prevented, but the driving wheel speed is already high making accurate and quick anti-slip driving difficult
Solution Approach 1:
The system performs preliminary action by predicting the target wheel torque that would cause wheel slip before the actual slip occurs. The prediction module calculates the torque threshold using motor state information from current and previous moments, enabling the TCS to activate torque reduction proactively when predicted torque approaches the threshold, rather than waiting for slip to exceed it. This resolves the contradiction by maintaining reliability through threshold-based control while achieving accurate and quick anti-slip driving through predictive intervention.
Solution Approach 2:
The system implements feedback by continuously monitoring the difference between predicted target wheel torque and actual motor output torque, and adjusting torque reduction control based on this feedback. When the predicted torque approaches the threshold, the system activates torque reduction with precise control, ensuring accurate anti-slip driving while preventing false triggering through intelligent threshold comparison rather than simple slip detection.
3Device complexity
If the TCS uses a threshold-based activation mechanism, then the system simplicity is maintained, but the response speed to wheel slip is reduced
Solution Approach 1:
The system performs preliminary action by predicting the target wheel torque using motor state information from current and previous moments before wheel slip occurs. This predictive approach allows the TCS to activate torque reduction proactively when the predicted torque approaches the threshold, significantly improving response speed compared to waiting for slip to exceed the threshold, while maintaining the simplicity of the threshold-based activation mechanism.
Solution Approach 2:
The system implements feedback by continuously monitoring motor state information and comparing predicted target wheel torque with actual motor output torque. This feedback mechanism enables rapid detection of approaching slip conditions and triggers timely torque reduction, improving response speed while keeping the control logic relatively simple through standardized feedback comparison and threshold-based activation.
Data Source
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AI summary
The disclosure relates to a method, vehicle and storage medium for vehicle acceleration slip regulating in the technical field of vehicle control, and the method includes: obtaining a vehicle speed, state information of a driving motor, and an accelerator pedal opening degree of the vehicle at a current moment(S11); predicting a target wheel torque of the vehicle according to the state information of the driving motor at the current moment and state information of the driving motor at a last moment, the last moment is a previous moment of the current moment(S12); and performing acceleration slip regulation on the vehicle according to a driving mode, the vehicle speed, the accelerator pedal opening degree, a motor output torque in the state information of the driving motor and the target wheel torque at the current moment(S13).