Vehicle Launch Slip Torque Control Using Wheel Speed Feedback
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Solution Overview
Problem
Existing slip control strategies in vehicles inaccurately calculate slip output torque due to reliance on the rate of change of motor rotational speed, leading to reduced driving experience and comfort.
Innovation Solution
A slip control method that determines the slip working condition of a vehicle based on wheel speed, acquires motor operating parameters, and adjusts actual output torque to accurately calculate slip output torque without relying on motor rotational speed changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the rate of change of motor rotational speed is used to calculate slip output torque, then the calculation can be performed with available data, but the calculation accuracy deteriorates when the rotational speed changes too fast
Solution Approach 1:
The patent introduces wheel speed as an intermediary parameter to calculate slip output torque. Instead of directly using motor rotational speed change rate, the system measures wheel speed and combines it with motor parameters to compute torque, thereby avoiding the accuracy degradation caused by rapid motor speed changes.
Solution Approach 2:
The patent changes the calculation parameters from motor rotational speed derivative to wheel speed-based parameters. By using wheel speed (which changes more gradually) combined with motor operating parameters like current and gear ratio, the system maintains calculation responsiveness while improving accuracy.
2Productivity
If maximum torque is output during launch starting to shorten acceleration time, then vehicle acceleration performance improves, but vehicle stability deteriorates due to increased slip probability
Solution Approach 1:
The patent implements feedback control by continuously monitoring wheel speed and calculating slip output torque in real-time during launch starting. The system adjusts motor torque based on the calculated slip torque, creating a closed-loop control that maintains both acceleration performance and vehicle stability.
Solution Approach 2:
The patent applies dynamic torque adjustment during launch starting. Instead of fixed maximum torque, the system dynamically modifies output torque based on real-time slip conditions, allowing the vehicle to maintain optimal acceleration while adapting to changing traction conditions to prevent slip.
Data Source
AI summary
A slip control method and apparatus, an electronic device and a storage medium are provided. The slip control method includes: acquiring a wheel speed of each wheel of a vehicle in response to a working condition that the vehicle is in a launch starting execution stage; determining a slip working condition of the vehicle according to the wheel speed of the wheel; acquiring one or more motor operating parameters of the vehicle, and determining a slip output torque of the vehicle according to the slip working condition of the vehicle and the motor operating parameters; and adjusting an actual output torque of the vehicle according to the slip output torque, and controlling the motor to operate at the adjusted actual output torque.