EV Vibration Reduction via Drivetrain Torsion Speed Correction
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Solution Overview
Problem
Conventional vibration reduction systems for electric vehicles exacerbate vibration during acceleration or deceleration by extracting drivetrain torsion as a vibration-induced portion and applying it to the driving motor torque, leading to increased vibration.
Innovation Solution
An apparatus and method that calculate drivetrain torsion speed, correct motor and model speeds, apply high-pass filtering, and phase delay the vibration-induced portion to generate an anti-jerk torque, effectively reducing vibration by integrating drivetrain torsion speed into the anti-jerk control process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional vibration extraction method is used without drivetrain torsion correction, then system complexity is reduced, but vibration reduction effectiveness deteriorates during dynamic operation
Solution Approach 1:
The patent performs preliminary calculation of drivetrain torsion speed before the vibration extraction process. By pre-calculating the torsion component using motor torque and drivetrain parameters, the system prepares correction data in advance that is then applied to both motor speed and model speed, ensuring accurate vibration extraction during dynamic operation without adding significant complexity to the control flow.
Data Source
AI summary
An apparatus and a method of reducing vibration of an electric vehicle capable of effectively reducing vibration by applying a drivetrain torsion speed during anti jerk control to extract a vibration-induced portion and processing the vibration-induced portion to generate a final output torque, include a drivetrain torsion speed calculator, a motor speed calculator, a model speed calculator, a vibration-induced portion calculator, a high-pass filter, a phase delay unit, and an anti jerk compensation torque generator.