Motor Torque Anti-Slip Control for Low-Adhesion Vehicle Roads
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Solution Overview
Problem
Excessive wheel slip or spin on low-adhesion road surfaces affects vehicle stability, safety, and performance, and existing anti-slip control methods suffer from signal lag and prolonged control periods.
Innovation Solution
An anti-slip control method that determines the actual speed of the motor, calculates a target speed based on slip rate and adhesion coefficient, adjusts driving torque to achieve the target speed, and employs a segmented PI control algorithm for rapid torque adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional anti-slip control methods are used, then wheel slip can be reduced, but signal lag and prolonged control periods occur, reducing response speed
Solution Approach 1:
The system performs preliminary calculations of target motor speed based on optimal slip rate and adhesion coefficient before slip occurs. By pre-establishing the control strategy and having target values ready, the system eliminates signal lag when slip detection occurs, enabling immediate torque adjustment without waiting for complete signal processing chains.
Solution Approach 2:
The patent replaces conventional mechanical/signal-based slip detection and control systems with a direct calculation approach. Instead of relying on mechanical sensors and lengthy signal transmission chains, the system directly calculates optimal slip rate and target motor speed using mathematical relationships between adhesion coefficient, slip rate, and motor parameters, significantly reducing control latency.
2Stability of the object's composition
If motor torque is adjusted to reduce wheel slip, then vehicle stability is improved, but acceleration performance and deceleration braking capability are affected
Solution Approach 1:
The system dynamically changes the optimal slip rate parameter based on the adhesion coefficient of the road surface. By calculating the optimal slip rate as a function of adhesion conditions, the system adjusts motor torque to maintain this optimal slip rate, ensuring maximum traction utilization. This allows the vehicle to achieve both stability and optimal acceleration performance by adapting the slip rate parameter to current road conditions rather than using fixed torque reduction strategies.
Data Source
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AI summary
An anti-slip control method and system for a vehicle, a vehicle, and a computer-readable storage medium. The anti-slip control method for the vehicle includes: obtaining an actual speed of a motor in the vehicle (S1); determining a target speed of the motor in the vehicle (S2); determining a slip state of wheels of the vehicle with respect to a current road surface according to the actual speed and the target speed of the motor (S3); and determining a current adjustment amount for an actual torque of the motor in the vehicle according to the slip state of the wheels of the vehicle with respect to the current road surface, and determining an adjusted driving torque of the motor according to the current adjustment amount, so as to adjust the actual speed of the motor in the vehicle, enabling the actual speed of the motor to reach the target speed of the motor (S4). The method has a fast and accurate recognition process, a short active anti-slip control link, a short control period, and a better anti-slip control effect.