Optimization control for dynamic vibration absorbers and active suspensions of in-wheel-motor-driven electric vehicles

This study addresses the challenges of ride comfort improvement and in-wheel-motor vibration suppression in in-wheel-motor-driven electric vehicles. First, a mathematical model of a quarter vehicle equipped with a dynamic vibration absorber and an active suspension is developed. Then, a two-stage optimization control method is proposed to improve the coupled dynamic vibration absorber–suspension performance. In the first stage, a linear quadratic regulator controller based on particle swarm optimization is designed for the dynamic vibration absorber to suppress the in-wheel-motor vibration, in which the dynamic vibration absorber parameters and linear quadratic regulator controller weighting factors are optimally matched by using the particle swarm optimization algorithm. In the second stage, a finite-frequency H∞ controller is designed in the framework of linear matrix inequality optimization for the active suspension to improve vehicle ride comfort. Suspension performance factors, including suspension working space and road-holding ability, are taken as constraints in both stages. The proposed method simultaneously improves vehicle ride comfort and suppresses in-wheel-motor vibration. Finally, the effectiveness and superiority of the proposed method are illustrated through comparison simulations.

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Computation of passive suspension parameters for improvement of vehicle ride quality based on stochastic optimal controller with a look-ahead preview

Noise & Vibration Worldwide ◽

10.1177/09574565211000390 ◽

2021 ◽

pp. 095745652110003

Author(s):

VSV Satyanarayana ◽

LVV Gopala Rao ◽

B Sateesh ◽

N Mohan Rao

Keyword(s):

Ride Comfort ◽

Linear Quadratic Regulator ◽

Active Suspension ◽

Ride Quality ◽

Linear Quadratic ◽

Passive Suspension ◽

Optimum Parameters ◽

Look Ahead ◽

Performance Error ◽

Suspension Performance

This article aims to determine the optimum parameters of a half-car model passive suspension vehicle passing on a random road. The optimum parameters are obtained based on the response of linear quadratic regulator control with a look-ahead preview for attaining the passive suspension performance nearly equivalent to the active suspension performance. The optimum parameters are estimated by equalizing mean square suspension controlling forces of passive and active vehicle models and subsequently minimizing the performance error between the two systems. The response of passive suspension with optimized parameters matches approximately with the active suspension response, with respect to ride comfort and road holding.

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Design and experimental verification of self-powered electromagnetic vibration suppression and absorption system for in-wheel motor electric vehicles

Journal of Vibration and Control ◽

10.1177/10775463211014419 ◽

2021 ◽

pp. 107754632110144

Author(s):

Ruochen Wang ◽

Yu Jiang ◽

Renkai Ding ◽

Wei Liu ◽

Xiangpeng Meng ◽

...

Keyword(s):

Electric Vehicles ◽

Vibration Suppression ◽

The Self ◽

Magnetorheological Damper ◽

Vibration Absorber ◽

Absorption System ◽

Dynamic Vibration Absorber ◽

Dynamic Vibration ◽

Electromagnetic Vibration ◽

Self Powered

A self-powered electromagnetic vibration suppression and absorption system integrated with a magnetorheological damper and a linear motor is designed to attenuate the negative effect of vertical vibration caused by the increased unsprung mass for in-wheel motor electric vehicles in this article. The magnetorheological damper is used as a suspension damper to suppress body vibration, and linear motor is used as a dynamic vibration absorber, namely, linear electromagnetic dynamic vibration absorber, to absorb tire vibration, and regenerates the vibration power to drive the magnetorheological damper, realizing self-power. Based on power flow theory, the power transfer mechanism of the vertical vibration for in-wheel motor electric vehicles and the regeneration potential are analyzed. The negative effect on the dynamic performance of in-wheel motor electric vehicles is analyzed through the root mean square of dynamic responses. Moreover, the specific structure scheme of the self-powered electromagnetic vibration suppression and absorption system is provided. The influence of system mass, stiffness, and damping of the linear electromagnetic dynamic vibration absorber on the dynamic performance is analyzed, and these parameters are optimized by particle swarm optimization. Simulation results show that in comparison with a passive damper, the self-powered electromagnetic vibration suppression and absorption system can reduce the body acceleration by 17.05%, which is better than the magnetorheological damper (10.08%). The self-powered electromagnetic vibration suppression and absorption system increases the tire dynamic load by 5.62%, but it is 8.68% less than the magnetorheological damper. Additionally, the regenerated power can offset the consumed power adequately to realize self-power. Finally, a bench test is conducted to verify the effectiveness and feasibility of the self-powered electromagnetic vibration suppression and absorption system.

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Integration Design and Optimization Control of a Dynamic Vibration Absorber for Electric Wheels with In-Wheel Motor

Energies ◽

10.3390/en10122069 ◽

2017 ◽

Vol 10 (12) ◽

pp. 2069 ◽

Cited By ~ 9

Author(s):

Mingchun Liu ◽

Feihong Gu ◽

Juhua Huang ◽

Changjiang Wang ◽

Ming Cao

Keyword(s):

Vibration Absorber ◽

Dynamic Vibration Absorber ◽

Design And Optimization ◽

Dynamic Vibration ◽

Optimization Control

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Numerical and experimental studies on the car body flexible vibration reduction due to the effect of car body-mounted equipment

Proceedings of the Institution of Mechanical Engineers Part F Journal of Rail and Rapid Transit ◽

10.1177/0954409716657372 ◽

2016 ◽

Vol 232 (1) ◽

pp. 103-120 ◽

Cited By ~ 16

Author(s):

Caihong Huang ◽

Jing Zeng ◽

Guangbing Luo ◽

Huailong Shi

Keyword(s):

High Speed ◽

Ride Comfort ◽

Numerical Study ◽

Experimental Studies ◽

Vibration Absorber ◽

Response Analysis ◽

Dynamic Vibration Absorber ◽

Vibration Absorption ◽

Car Body ◽

Dynamic Vibration

To study the effect of car body-mounted equipment on the car body flexible vibration, a vertical rigid-flexible coupling model of a high-speed vehicle is established, which includes a flexible car body, rigid bodies for two bogie frames, four wheelsets, and the car body-mounted equipment. The car body is approximated by an elastic beam, with dimensions selected to give similar mass and vertical bending frequency to an existing car body. Model validation is then carried out by comparing results from numerical simulation and on-track test. Using frequency response analysis and ride comfort analysis, parametric studies are undertaken in order to investigate the respective effect of equipment mounting systems on the car body flexible vibration and ride comfort perceived by the passenger. It is found that the equipment behaves as a dynamic vibration absorber on account of its elastic connections to the car body. The stiffness, damping, mass, and installing position of the equipment have a significant influence on the car body flexible vibration. The optimal parameters of the dynamic vibration absorber are given, which can contribute much to the vibration absorption of the car body flexible vibration. Finally, extensive tests on a high-speed test vehicle are conducted to represent a part of results obtained in the numerical study, including modal tests on the car body, component tests on rubber springs used in the equipment mounting systems, and roller rig tests on the vibration absorption performance of the equipment. It is shown that the car body flexible vibration can be effectively suppressed by reasonably suspending the car body-mounted equipment.

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