scholarly journals System modeling and identification of a balance type checkweigher compensated by voice coil actuator

2019 ◽  
Vol 11 (10) ◽  
pp. 168781401988442
Author(s):  
Annadurai Vimalesh ◽  
JiYun An ◽  
Jung Hwan Ahn ◽  
Hwa Young Kim
Keyword(s):  
System Identification ◽  
System Modeling ◽  
Experimental Results ◽  
Simplified Model ◽  
Damping Effect ◽  
Mechanical Part ◽  
Electromagnetic Damping ◽  
Electrical Part ◽  
System Modeling And Identification ◽  
Voice Coil Actuator

The aim of this article is to investigate the characteristics of checkweigher which consists of two parts: electrical part (voice coil actuator) and mechanical part (lever-pivot mechanism). Its integrated weighing system simplified m, c, and k model, and system identification is performed through comparison of experimental results and simulated results by Simulink. m and k are attributed to the mechanical part and c is mainly due to the electromagnetic damping of voice coil actuator. Even with a determined voice coil actuator, the damping effect can be adjusted by the relocation of voice coil actuator to improve the performance of checkweigher. The validity of the simplified model is verified by comparing simulation and experimental results.

scholarly journals A Simplified Model Applied to the Barite Sag and Fluid Flow in Drilling Muds: Simulation and Experimental Results

2017 ◽  
Vol 72 (4) ◽  
pp. 23 ◽  
Author(s):  
José Messias Ribeiro ◽  
Felipe Moreira Eler ◽  
André Leibson Martins ◽  
Cláudia Miriam Scheid ◽  
Luís Américo Calçada ◽  
...  
Keyword(s):  
Fluid Flow ◽  
Experimental Results ◽  
Simplified Model ◽  
Drilling Muds

Research of Fan System Identification Based on Improved Bayes Algorithm

2011 ◽  
Vol 66-68 ◽  
pp. 448-453
Author(s):  
Hai Tao Wang ◽  
Ze Zhang
Keyword(s):  
System Identification ◽  
Dynamic Characteristics ◽  
System Modeling ◽  
Estimation Algorithm ◽  
Parametric Model ◽  
Testing System ◽  
Identification Algorithm ◽  
Environment Protection ◽  
Parameter Estimation Algorithm ◽  
Bayes Algorithm

In every filed of natural science, more and more researchers attach importance to system quantitative analysis, control and prediction. In filed of automatic control, system identification is the extension of system dynamic characteristics testing. System modeling is the basis of system identification, non-parametric model can be obtained by means of dynamic characteristics testing, but parametric model must be established by means of parameter estimation algorithm, which is more prevalent than dynamic characteristics testing. Coal power plant produces more gas and dust, so how to control the fan system plays a very important role in environment protection. We must clarify the parameter of fan system before controlling it. The traditional Bayes identification algorithm is used widely in research and industry, and the effect is relatively good. The paper induces the concept of loss function based on traditional Bayes identification algorithm, and proposes an improved Bayes identification algorithm, which can be applied to fan system identification successfully.

Thickness-resonance waves in underlays of floating screed

2021 ◽  
Vol 263 (3) ◽  
pp. 2973-2983
Author(s):  
Charlotte Crispin ◽  
Debby Wuyts ◽  
Dijckmans Arne
Keyword(s):  
Finite Element ◽  
Transfer Matrix ◽  
Sound Pressure Level ◽  
Transfer Matrix Method ◽  
Matrix Method ◽  
Sound Pressure ◽  
Pressure Level ◽  
Experimental Results ◽  
Simplified Model ◽  
Negative Effects

The prediction of the reduction of impact sound pressure level ΔL according to annex C of the standard ISO 12354-2 gives an acceptable estimation of the floating floor's performance for thin resilient layers. However, the performance is often largely overestimated for thick resilient layers or for resilient layers combined with thermal layers. One reason for this is that the simplified model doesn't account for the thickness resonances in the underlays which can greatly affect ΔL. This is confirmed by comparing finite element and transfer matrix method simulations with experimental results. This paper establishes the mechanisms leading to the development of these resonance waves and provides some guidelines to estimate their negative effects on the ΔL.

scholarly journals NUMERICAL MODEL OF BREAKWATER WAVE FLOWS

1988 ◽  
Vol 1 (21) ◽  
pp. 149 ◽  
Author(s):  
Alex C. Thompson
Keyword(s):  
Mathematical Model ◽  
Numerical Model ◽  
Reflection Coefficient ◽  
Water Wave ◽  
Wave Equations ◽  
Seepage Flow ◽  
Experimental Results ◽  
Simplified Model ◽  
Flow Equations ◽  
Shallow Water Wave Equations

A mathematical model of flow on a sloping breakwater face is described and results of calculations compared with some experimental results to show how the model can be calibrated. Flow above the surface of the slope is represented by the shallow water wave equations solved by a finite difference method. Flow within the breakwater is calculated by one of two methods. A solution of the linear seepage flow equations, again using finite differences or a simplified model of inflow can be used. Experimental results for runup and reflection coefficient are from tests performed at HRL Wallingford.

A Theoretical Model for High Rate Electrochemical Machining

1973 ◽  
Vol 95 (4) ◽  
pp. 1003-1008 ◽  
Author(s):  
S. P. Loutrel ◽  
N. H. Cook
Keyword(s):  
Theoretical Model ◽  
Electrochemical Machining ◽  
Experimental Results ◽  
High Rate ◽  
Simplified Model ◽  
Complex Geometries ◽  
Machining Parameters ◽  
Computer Solution ◽  
Cutting Zone ◽  
Current Densities

A theoretical model for the process occurring in the cutting zone is developed. A computer solution to apply the model to an actual ECM situation is outlined. A simplified model and computer solution is described which can be used to predict machining parameters for complex geometries. For both models good correlation of experimental results is found in most cases. The application of classical electrochemistry to conditions where extreme current densities (5800 amps/cm2) are encountered is discussed.

scholarly journals Nonlinear system modeling and identification of an onshore oscillating water column - wave energy converter, using Volterra series and Hilbert-Huang transform

2012 ◽  
Author(s):  
Γεώργιος Γκίκας
Keyword(s):  
Nonlinear System ◽  
Water Column ◽  
Wave Energy ◽  
Volterra Series ◽  
System Modeling ◽  
Oscillating Water Column ◽  
Energy Converter ◽  
Nonlinear System Modeling ◽  
Hilbert Huang Transform ◽  
System Modeling And Identification

Ο κύριος στόχος της Δ.Δ. είναι να αναπτυχθεί ένα συστημικό μοντέλοκατάλληλο να περιγράψει την λειτουργία της συσκευής κυματικήςενέργειας με ταλαντευόμενη στήλη ύδατος, επικεντρώνοντας τοενδιαφέρον στην μεταβολή της δυναμικής πίεσης μέσα στο κλωβό τηςσυσκευής.Η μεθοδολογία που αναπτύχθηκε περιλαμβάνει την χρησιμοποίησησειρών Volterra και μετασχηματισμού Hilbert-Huang με βάση τα οποίακατασκευάστηκε ακριβές και εύρωστο συστημικό μοντέλο για το μη-γραμμικο μέρος του συστήματος.Τα αποτελέσματα κρίνονται ως άκρως ικανοποιητικά και η μεθοδολογίαπου αναπτύχθηκε εκτός του υπολογιστικού κόστους που εξοικονομείμπορεί να εφαρμοστεί ακόμα σε μια πλειάδα μη-γραμμικών δυναμικώνσυστημάτων.

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