Journal ArticleDOI
Dynamic Modeling and Analysis of Drum-type Washing Machine
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In this paper, a simplified dynamic analysis of a drum-type washing machine has been conducted using a simplified model considering gyroscopic effects, which has 6 degrees of freedom in the complex coordinate space and transformed real coordinate space to understand the whirling motion easily.Abstract:
In this study, dynamic analysis of a drum-type washing machine has been conducted using a simplified dynamic model considering gyroscopic effects. Its mathematical model has 6-degree of freedom in the complex coordinate space into which is transformed real coordinate space to understand the whirling motion easily. Dynamic analysis is performed using MATLAB. For the purpose of numerical verification, the results for unbalance response are presented and compared with the experimental vibration test. The mathematical model proves quite good accuracy in predicting dynamic characteristics which could be changed by the parameters of design variable and can reduce design cycle shortly. Dynamic characteristics of a washing machine are shown through shape and directivity index (SDI), whirling orbits, rigid and flexible mode of a drum type washing machine during drum run-up. In designing drum type of washing machine, it is efficient than finite element method to analyze behaviors of drum and tub.read more
Citations
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Journal ArticleDOI
Optimal design of magnetorheological fluid-based dampers for front-loaded washing machines
TL;DR: In this paper, a magnetorheological fluid-based damper to attenuate vibration due to unbalanced laundry mass from a front-loaded washing machine is proposed and optimally designed with experimental validation.
Journal ArticleDOI
Dynamic modeling and analysis of a wind turbine drivetrain using the torsional dynamic model
TL;DR: In this paper, a torsional multibody dynamic model for a horizontal axial wind turbine drivetrain was developed using the torsion multibore dynamic model, which consisted of a low-speed planetary gear stage (three identical planets with spur teeth, sun and fixed ring gears) and two high-speed spur gear stages.
Journal ArticleDOI
Multibody modeling and vibration dynamics analysis of washing machines
Thomas Nygårds,Viktor Berbyuk +1 more
TL;DR: In this article, a computational model of a horizontal axis washing machine is presented using a theoretical-experimental methodology consisting of integration of multibody system formalism, detailed modeling of machine functional components and experimental data-based validation.
Journal ArticleDOI
Dynamic modeling of a horizontal washing machine and optimization of vibration characteristics using Genetic Algorithms
Pinar Boyraz,Mutlu Gündüz +1 more
TL;DR: In this article, a 2D dynamic model of a horizontal axis washing machine is derived regarding the rotation plane in order to examine the vibration characteristics of the spin-cycle and improve the design proposing a new optimization scheme based on GA.
Journal ArticleDOI
Optimal design and performance evaluation of a flow-mode MR damper for front-loaded washing machines
TL;DR: This research work focuses on the optimal design of a flow-mode magneto-rheological (MR) damper that can replace the conventional passive damper for a washing machine.
References
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Book
Vibration analysis of rotors
TL;DR: In this paper, the authors present a model of a simple rotor bearing system with fluid film bearing and show that it is a distributed Parameter Rotor-Bearing System.
Proceedings ArticleDOI
Modeling, design and control of a portable washing machine during the spinning cycle
TL;DR: In this paper, a simplified three-dimensional dynamic model of a horizontal-axis portable washing machine is presented, which is used to predict the verge of walking instability during the spinning cycle.
Journal ArticleDOI
On the problem of oscillatory walk of automatic washing machines
D.C. Conrad,W. Soedel +1 more
TL;DR: In this article, the authors investigated the walk of horizontal and vertical axis washers using dynamic models of these washing machine systems and found that the horizontal axis washer typically exhibits an oscillatory walk behavior in place while the vertical axis exhibited an unstable walk behaviour in the sense that the oscillating machine will move steadily in a direction dictated by the rotational direction of the basket.
Journal ArticleDOI
Three-dimensional modelling and dynamic analysis of an automatic ball balancer in an optical disk drive
TL;DR: In this article, the authors analyzed the behavior and stability of an automatic ball balancer (ABB) in an optical disk drive based on the proposed three-dimensional dynamic model, where the feeding deck with the ABB and a spindle motor was modeled as a rigid body with six degrees of freedom.
Journal ArticleDOI
Directional Wigner distribution for order analysis in rotating/reciprocating machines
Yun-Sik Han,Chong-Won Lee +1 more
TL;DR: In this article, a signal processing technique for rotation-related transient signals from a rotating or reciprocating machine is proposed to characterise its instantaneous planar motion, which essentially utilises the directional Wigner distributions (dWDs) defined for the forward and backward pass analytic signals.