Design and Analysis of an Active Balancing Mechanism for a Vertical Axis Washing Machine

Chen, Haiwei; Yuan, Xun-Ting; Sun, Zhen; Mou, Qiu-Qi; Xiong, Ming

doi:10.1007/s12541-022-00663-w

Cited by 3 publications

(2 citation statements)

References 19 publications

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“…In active ABD, the corrective masses move forcibly, in a passively free manner under the action of internal forces; their work is carried out due to the energy of the rotor itself. Active devices include devices with forced movement or change in rotor masses, as well as forced centering devices [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

The Inertial Disturbances of Fluid Movement in the Chamber of a Liquid Autobalancer

Lozynskyi,

Shihab,

Drach

et al. 2024

Machines

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This article analyses the problem of automatic balancing rotors with a liquid balancer, which is a cylindrical chamber partially filled liquid of a certain density. This problem is related to the problem of the dynamics of bodies with cavities partially filled with liquid. As part of this task, we analyzed disturbances in the relative motion of the fluid in the ABD chamber caused by the Coriolis force inertia. The distortions of the free surface of the liquid were found, resonant phenomena in the flow of the working fluid were investigated, and the physical explanation of the received results given should be taken into account when designing the corresponding ones self-balancing devices. It was established that the axial component of the Coriolis inertial force causes peculiar wave phenomena in the correcting fluid movement. For the given nature of undisturbed motion, the conditions of this phenomenon’s occurrence are determined only by the geometric dimensions of the cylindrical chamber and the thickness of the liquid layer in undisturbed motion, and do not depend on the intensity of rotation of the liquid, nor on its density. It is shown that a decrease in the “ABD chamber height–radius” ratio leads to stabilization of the movement of the system. Experimental verification has been performed; theoretical results on the developed stand for work research rotor system with a vertical axis of rotation.

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Section: Introductionmentioning

confidence: 99%

The Inertial Disturbances of Fluid Movement in the Chamber of a Liquid Autobalancer

Lozynskyi,

Shihab,

Drach

et al. 2024

Machines

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show abstract

“…In the context of the dynamic performance of the washing machines, researchers also investigated the effect of using automatic or hydraulic balancers. Chen et al [12] developed an active balancing system using water as a counteract to suppress vibrations in a vertical axis washing machine. They created a dynamic model to design a control system that displaces water to counteract unbalanced laundry loads, then manufactured and tested an equipped washing machine prototype with this active balancing mechanism.…”

Section: Introductionmentioning

confidence: 99%

Parametric Dynamic Simulation and Bayesian Design Optimization of a Front-Loading Washing Machine

Hashemian,

Yang,

Wang

et al. 2024

J. Vib. Eng. Technol.

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Objective This paper presents the dynamic modeling and design optimization of a fully parametrized front-loading washing machine. Methods A thorough mathematical analysis is performed to capture the effect of nine design variables (including rotation speed, spring stiffness, weight balancer mass density, damping coefficient, spring and damper angles) on vibrational characteristics of the washing machine. The parametric simulation reveals a complex relationship between the vibrational dynamics and design variables, entailing a computationally efficient optimization approach. A Bayesian Optimization (BO) framework is developed, in which a Gaussian process model and Genetic Algorithm (GA) are utilized along with carefully selected acquisition functions to enable adaptive sampling and search for optimal design values. The objective function is to minimize the maximum amplitude of the tub displacement inside the washing machine body. Two case studies are performed to consider a different number of design variables and choices of various infill methods. Results Results show that the fully parametrized front-loading washing machine model is applicable for parametric simulation and design optimization. The proposed BO is able to successfully find a set of design variable values corresponding to the lowest maximum displacement for vibration reduction. A comparison analysis is also carried out to exhibit the difference in optimization convergence and computational cost caused by the choice of acquisition functions. Conclusion It is shown that the fully parametrized washing machine model yields a lower maximum displacement than the model with fewer design variables. Of the two acquisition functions studied for optimization, the Expected Improvement function converges more rapidly than the Lower Bound criterion.

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Predicting the Dynamic Behavior of a System with a Neural State Observer Using Recurrent Neural Networks a Case Study on a Washing Machine

Shahbazi,

Mohagheghiyan,

Pour

2024

Preprint

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Design and Analysis of an Active Balancing Mechanism for a Vertical Axis Washing Machine

Cited by 3 publications

References 19 publications

The Inertial Disturbances of Fluid Movement in the Chamber of a Liquid Autobalancer

The Inertial Disturbances of Fluid Movement in the Chamber of a Liquid Autobalancer

Parametric Dynamic Simulation and Bayesian Design Optimization of a Front-Loading Washing Machine

Predicting the Dynamic Behavior of a System with a Neural State Observer Using Recurrent Neural Networks a Case Study on a Washing Machine

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