Washing Machine Health Diagnostics Through Information Synthesis

2001 ◽  
Author(s):  
J. Brown ◽  
M. A. Franchek
Keyword(s):  
Lumped Parameter Model ◽  
Washing Machine ◽  
Wash Cycle ◽  
Information Synthesis ◽  
Pulse Input ◽  
Lumped Parameter ◽  
Design Values ◽  
Simulation Results ◽  
Machine Health ◽  
Measured Displacement

Abstract Presented in this paper is a model-based method for assessing suspension and motor health of washing machines. The diagnosis of the suspension and motor health is achieved by processing the measured dynamics of the washtub. In particular, an online adapted lumped parameter model of the washtub is used to estimate key suspension and motor parameters. These parameters are identified from the measured displacement of the washtub due to a motor pulse input prior to the beginning of the wash cycle. Comparing the estimated values to design values assesses both suspension and motor health. Included are simulation results to validate the parameter estimation process.

Research on Torsional Vibration of the Propulsion Shafting Gear System Based on an Extended Lumped Parameter Model

2010 ◽  
Vol 37-38 ◽  
pp. 1120-1124 ◽  
Author(s):  
Xiang Xu ◽  
Rui Ping Zhou
Keyword(s):  
Natural Frequency ◽  
Normal Condition ◽  
Torsional Vibration ◽  
Gear System ◽  
Lumped Parameter Model ◽  
Prototype Model ◽  
Analysis Method ◽  
Lumped Parameter ◽  
Marine Propulsion ◽  
Simulation Results

In this paper, gear dynamics theory has been introduced into the torsional vibration calculation of the marine propulsion shafting. The vibration equations of a marine gearbox were established using an extended lumped parameter model through reasonably adjusting the parameters to get the natural frequency of marine gearbox shafting gear system. The solution of the equations shows that under normal condition, the natural frequency of gear meshing transmission is high and the gearbox itself will not affect the torsional resonance. Then a virtual prototype model of marine gearbox was built by the use of ADAMAS software. The simulation results show that the proposed method could reflect the actual torsional vibration correctly. Thus, the analysis method presented in this work is available for the torsional vibration calculation of the marine gearbox.

Comparison of Containment Response for a CANDU 6 Station Blackout Sequence Using MAAP4-CANDU (v4.0.7) and GOTHIC (v7.2b)

2012 ◽  
Author(s):  
S. M. Petoukhov ◽  
Tuan H. Nguyen ◽  
B. Awadh ◽  
P. M. Mathew
Keyword(s):  
Lumped Parameter Model ◽  
Gas Temperature ◽  
Spray System ◽  
Core Damage ◽  
Lumped Parameter ◽  
Station Blackout ◽  
Simulation Results ◽  
Similar Good ◽  
Comparison Of The Results ◽  
Containment Pressure

The objective of this study is to compare containment simulation results predicted by MAAP4-CANDU v4.0.7 and GOTHIC v7.2b for a Station Blackout severe core damage accident, when the containment dousing spray system is not credited. The input parameters (mass and energy source terms into containment) for GOTHIC were generated by MAAP4-CANDU for the Station Blackout sequence. The GOTHIC (lumped parameter model) and MAAP4-CANDU containment nodalization models were very similar, thus facilitating direct comparison of the results. Analysis of the results demonstrated that the simulation results obtained with the two codes are similar. Good agreement was obtained for the containment pressure, gas temperature and containment atmosphere composition predictions.

Fractional Lumped Parameter Modeling of Transformer Windings under VFTO

2014 ◽  
Vol 494-495 ◽  
pp. 1529-1533
Author(s):  
Gui Shu Liang ◽  
Guang Bo Zhang ◽  
Xin Liu
Keyword(s):  
Transmission Line ◽  
Lumped Parameter Model ◽  
Voltage Distribution ◽  
High Frequencies ◽  
Simulation Process ◽  
Lumped Parameter ◽  
Lumped Parameter Modeling ◽  
Lumped Parameters ◽  
Simulation Results ◽  
Transient Overvoltage

Very fast transient overvoltage (VFTO) is very dangerous for the transformer which is directly connected to gas insulated substations (GIS). At the same time, due to the continuous increasing of operating frequency in the power system, under the high frequencies of the transmission line calculation and simulation process, it is necessary to consider the frequency-dependent properties of the parameter. In order to study the voltage distribution in transformer windings under VFTO, a new Lumped parameter model which takes into account the fractional characteristics is proposed, named fractional lumped parameter model (FLP). The model divides each turn of transformer windings into proper sections, whose parameters are all lumped parameters. Finally it shows the correctness and validity of the model through the comparation of the experiment datas and simulation results.

Multi Domain Co-Simulation of the Human Thermoregulatory System

1999 ◽  
Author(s):  
Bei Gu ◽  
Haruhiko H. Asada
Keyword(s):  
Neural Control ◽  
Large Scale ◽  
Coupled Model ◽  
Ambient Air ◽  
Lumped Parameter Model ◽  
Arterial Blood ◽  
Lumped Parameter ◽  
Thermoregulatory System ◽  
The Mean ◽  
Simulation Results

Abstract This paper presents a new lumped-parameter model based simulation that describes the dynamics of the human thermoregulatory system. This approach captures the dynamic behavior of the circulation, thermal, and neural control subsystems. These coupled dynamics have never been studied even though subsystem models have existed for some time. The simulator relates the ambient air temperature to the mean arterial blood pressure, skin blood flow, and skin temperature. Experiments are used to verify the model. The simulation results are agreed with the real time experimental measurements. Furthermore, the coupled model and the co-simulator are constructed in a modular fashion that satisfies many requirements of large-scale complex physiological co-simulation.

RF Performances of MEMS Suspended Inductor under High Overload Environments

2014 ◽  
Vol 609-610 ◽  
pp. 1503-1507
Author(s):  
Chong Ying Lu ◽  
Jian Hua Li ◽  
Li Xin Xu ◽  
Zhi Gang Wang
Keyword(s):  
Resonant Frequency ◽  
Frequency Band ◽  
Lumped Parameter Model ◽  
Spiral Inductor ◽  
Cmos Process ◽  
Ohmic Loss ◽  
Mechanical Responses ◽  
Lumped Parameter ◽  
Simulation Results ◽  
Rf Performances

The radio frequency (RF) performances of MEMS suspended spiral inductor under high overload environments are studied. Firstly, a suspended spiral inductor and its MEMS surface micromachining process which is compatible with CMOS process are developed. Then, the mechanical responses and RF performances of the inductor are simulated by ANSYS and HFSS, respectively. The simulation results show that, as the overload increases, the inductance and quality factor decrease significantly when the frequency band is closed to the resonant frequency but have no significant change when the frequency band is much lower than resonant frequency; the resonant frequency of the suspended inductor decreases monotonically with the increase of overload. A modified lumped parameter model is utilized to illustrate the simulation results, which theoretically indicates that the substrate loss is more severe than the ohmic loss as the overload increases.

scholarly journals A Distributed Lumped Parameter Model of Blood Flow

2020 ◽  
Vol 48 (12) ◽  
pp. 2870-2886
Author(s):  
Mehran Mirramezani ◽  
Shawn C. Shadden
Keyword(s):  
Blood Flow ◽  
Lumped Parameter Model ◽  
Lumped Parameter
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