Identification of firefly algorithm-based fluctuation coefficient of the exciting torque for vehicle driveline

The unbalanced excitation force and torque generated by an engine that resonate with the natural frequency of drivetrain often causes vibration and noise problems in vehicles. This study aims to comprehensively employ theoretical modelling and experimental identification methods to obtain the fluctu...

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Bibliographic Details
Published in:Proceedings of the Institution of Mechanical Engineers. Part K, Journal of multi-body dynamics Journal of multi-body dynamics, 2019-06, Vol.233 (2), p.317-326
Main Authors: Liu, Qiaobin, Shi, Wenku, Chen, Zhiyong
Format: Article
Language:English
Subjects:
Acceleration
Algorithms
Automobiles
Clutches
Coefficients
Damping
Excitation
Flywheels
Heuristic methods
Identification methods
Mathematical models
Modelling
Parameter identification
Powertrain
Product design
Resonant frequencies
Shafts (machine elements)
Stiffness
Throttles
Torque
Torsion
Torsional vibration
Variation
Vibration analysis
Vibration control
Vibration tests
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Summary:The unbalanced excitation force and torque generated by an engine that resonate with the natural frequency of drivetrain often causes vibration and noise problems in vehicles. This study aims to comprehensively employ theoretical modelling and experimental identification methods to obtain the fluctuation coefficients of engine excitation torque when a car is in different gear positions. The inherent characteristics of the system are studied on the basis of the four-degree-of-freedom driveline lumped mass model and the longitudinal dynamics model of vehicle. The correctness of the model is verified by torsional vibration test. The second order's engine torque fluctuation coefficients are identified by firefly algorithm according to the curves of flywheel speed in different gears under the acceleration condition of the whole open throttle. The torque obtained by parameter identification is applied to the model, and the torsional vibration response of the system is analysed. The influence of the key parameters on the torsional vibration response of the system is investigated. The study concludes that proper reduction of clutch stiffness can increase clutch damping and half-axle rigidity, which can help improve the torsional vibration performance of the system. This study can provide reference for vehicle drivetrain modelling and torsional vibration control.
ISSN:1464-4193
2041-3068
DOI:10.1177/1464419318808172