Modeling, design and control of a portable washing machine during the spinning cycle

Papadopoulos, Evangelos; Papadimitriou, Iakovos

doi:10.1109/aim.2001.936786

Cited by 36 publications

(24 citation statements)

References 3 publications

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“…In [6][7][8][9][10][11][12][13][14] very simple models of the electromechanical system, aimed at describing the load dynamics, for load size estimation, unbalance load detection and vibration compensation are presented. More complex load models, that describe the mechanical and fluid dynamics interactions among water, laundry and drum, are proposed in [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Velocity control of a washing machine: A mechatronic approach

et al. 2012

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Section: Introductionmentioning

confidence: 99%

Velocity control of a washing machine: A mechatronic approach

et al. 2012

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“…Examples of such are described in [3] and [10]. Other solutions involve translation of the spinning axis relative to the drum [11,12,13] by using a mechanism for control of the eccentricity.…”

Section: Counterbalancingmentioning

confidence: 99%

“…Also the topic of automatic (passive) counterbalancing is treated and concepts for dealing with this problem are discussed. The paper [3] presents a simplified 3D dynamic model of a horizontal-axis portable washing machine with a balancing device. Also different criteria for determination of the margin to walking during the spinning cycle are presented, extending [1].…”

Section: Introductionmentioning

confidence: 99%

“…Some are active solutions which require external sensing and control to position counteracting solid masses. Simulations on such devices have been performed in one plane in [3] and two planes [10]. Other solutions to remove static imbalance involve translation of the spinning axis relative to the drum [11][12][13] by using different mechanisms to control its eccentricity.…”

Section: Introductionmentioning

confidence: 99%

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Multibody modeling and vibration dynamics analysis of washing machines

Nygårds

Berbyuk

2011

Multibody Syst Dyn

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In this paper a computational model of a horizontal axis washing machine is presented. The model has been built using a theoretical-experimental methodology consisting of integration of multibody system (MBS) formalism, detailed modeling of machine functional components and experimental data based validation. The complete model of a washing machine is implemented in the commercial MBS environment Adams/View from MSC.Software.An undesirable impact of washing machine operation on the surroundings is vibration and noise. The impact comes from system dynamics and poorly distributed load inside the drum, creating an imbalance. To get insight into vibration dynamics extensive simulations have been performed for washing machines in service as well as for machines in the developing stage by using the created computational model. This paper presents several results of numerical studies of the vibration dynamics of washing machines including the study of sensitivity of system dynamics with respect to suspension structural parameters, and the results of investigation of the potential of the automatic counterbalancing technology for vibration output reduction. In particular, simulations of the considered two plane balancing device has shown an existing significant potential in eliminating unbalanced load at supercritical spinning speed, resulting in a substantial vibration reduction in washing machines.Commemorative Contribution.

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“…Papadopoulas and Papadimitriou provided a mathematical model of a horizontal axis washing machine assuming that the machine is a rigid structure [10]. In this model, the maximum angular velocity that can be reached (walking stability threshold) is determined according to other parameters such as the weight of clothes and friction between the ground and the feet.…”

Section: Introductionmentioning

confidence: 99%

Semiactive Vibration Control for Horizontal Axis Washing Machine

Yalçin

Erol

2015

Shock and Vibration

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A semiactive vibration control method is developed to cope with the dynamic stability problem of a horizontal axis washing machine. This method is based on adjusting the maximum force values produced by the semiactive suspension elements considering a washing machine's vibration data (three axis angular position and three axis angular acceleration values in time). Before actuation signals are received by the step motors of the friction dampers, vibration data are evaluated, and then, the step motors start to narrow or expand the radius of bracelets located on the dampers. This changes the damping properties of the damper in the suspension system, and thus, the semiactive suspension system absorbs unwanted vibrations and contributes to the dynamic stability of the washing machine. To evaluate the vibration data, the angular position and angular acceleration values in three axes are defined in a function, and the maximum forces produced by semiactive suspension elements are calculated according to the gradient of this function. The relation between the dynamic stability and the walking stability is also investigated. A motion (gyroscope and accelerometer) sensor is installed on the top-front panel of the washing machine because a mathematical model of a horizontal axis washing machine suggests that the walking behavior starts around this location under some assumptions, and therefore, calculating the vibrations occurring there is crucial. Semiactive damping elements are located under the left and right sides of the tub. The proposed method is tested during the spinning cycle of washing machine operation, increasing gradually from 200 rpm to 900 rpm, which produces the most challenging vibration patterns for dynamic stability. Moreover, the sound power levels produced by the washing machine are measured to evaluate the noise performance of the washing machine while the semiactive suspension system is controlled. The effectiveness of the proposed control method is shown through experimental results.

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Modeling, design and control of a portable washing machine during the spinning cycle

Cited by 36 publications

References 3 publications

Velocity control of a washing machine: A mechatronic approach

Velocity control of a washing machine: A mechatronic approach

Multibody modeling and vibration dynamics analysis of washing machines

Semiactive Vibration Control for Horizontal Axis Washing Machine

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