scholarly journals Application of Identification Reference Nets for the Preliminary Modeling on the Example of Electrical Machines

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3091
Author(s):  
Krzysztof Tomczyk ◽  
Marek Sieja ◽  
Grzegorz Nowakowski
Keyword(s):  
Artificial Intelligence ◽  
Transfer Function ◽  
Parametric Identification ◽  
Electric Power System ◽  
Electrical Machines ◽  
New Approach ◽  
Squirrel Cage ◽  
Determination Of Parameters ◽  
Special Algorithm

This paper presents the use of identification reference nets (IRNs) for modeling electric power system (EPS) components using electrical machines (EMs) as an example. To perform this type of task, a database of reference nets is necessary, to which the identification net (IN) of the modeled machine is adjusted. Both the IRN and IN are obtained by using a special algorithm that allows the relevant transfer function (TF) to be converted to the rounded trajectory. This type of modeling can be a useful tool for the initial determination of parameters included in the TF associated with the EM, preceding advanced parametric identification procedures, e.g., those based on artificial intelligence methods. Two types of electrical machines are considered, i.e., the squirrel-cage asynchronous (SCA) and brushless direct-current (BLDC) machines. The solution proposed in this paper is a new approach intended for modeling EPS components.

A New Approach for the Determination of Cam Follower System Parameters

1988 ◽  
Vol 202 (5) ◽  
pp. 361-368
Author(s):  
M K Baru ◽  
J Ellis
Keyword(s):  
Parametric Identification ◽  
Filter Method ◽  
New Approach ◽  
State Variable ◽  
Cam Follower ◽  
State Variable Filter ◽  
Stiffness And Damping ◽  
Design And Manufacture

This paper reports a first investigation in the use of the state variable filter method of parametric identification in the determination of the mass, stiffness and damping content of cam follower systems. Simulated and real experimental data are processed by the technique with good results. Further developments are necessary (extension to higher order systems and inclusion of Coulomb damping) with the long-term aim of applying the results in the design and manufacture of dynamically tuned cams.

scholarly journals Optimal cutting and prediction of assortment yields before and during tree felling

2019 ◽  
Author(s):  
А.С. Торопов ◽  
А.Н. Соловьев
Keyword(s):  
Mathematical Model ◽  
Exhaustive Search ◽  
Maximum Volume ◽  
New Approach ◽  
Optimum Cutting ◽  
Sexual Part ◽  
Determination Of Parameters ◽  
The Mathematical Model

В настоящей статье рассматривается новый подход к проблеме оптимального раскроя и прогнозирования выхода сортиментов до и в процессе валки деревьев. Авторы предлагают и теоретически обосновывают рациональный раскрой пиловочной части дерева по критерию максимального объемного выхода пиловочника в стоимостном выражении. В работе приведена математическая модель определения параметров половой части дерева на основе аллометрического метода исследований предмета труда и оптимального раскроя и прогнозирования выхода сортиментов до и в процессе валки деревьев с использованием метода исчерпывающего поиски и методы ветвей и границ. In this article new approach to a problem of optimum cutting and forecasting of an exit of assortments to and in process rolls of trees is considered. Authors offer and theoretically prove rational cutting of a pilovochny part of a tree by criterion of the maximum volume exit of sawlog in value terms. In work the mathematical model of determination of parameters of a sexual part of a tree on the basis of anallometrichesky method of researches of an object of the labor and optimum cutting and forecasting of an exit of assortments to and is given in process rolls of trees with use of a method exhaustive search and methods of branches and borders.

Determination of parameters of short circuit of power transformer by means of mathematical modeling

2017 ◽  
Vol 26 (102) ◽  
pp. 110-119
Author(s):  
D. S. Yarymbash, ◽  
◽  
S. T. Yarymbash, ◽  
T. E. Divchuk, ◽  
D. A. Litvinov
Keyword(s):  
Mathematical Modeling ◽  
Power Transformer ◽  
Short Circuit ◽  
Determination Of Parameters

The Dudley Lee Case: A new approach to factual causation and its implications for transformative jurisprudence

2017 ◽  
Vol 30 (1) ◽  
pp. 273-289
Author(s):  
Anmari Meerkotter
Keyword(s):  
Case Note ◽  
Constitutional Court ◽  
Recent Contribution ◽  
New Approach ◽  
State Accountability ◽  
The Law ◽  
Transformative Impact ◽  
Constitutional Jurisprudence ◽  
Law Of Delict

The Constitutional Court (CC) judgment of Lee v Minister of Correction Services 2013 2SA 144 (CC) is a recent contribution to transformative constitutional jurisprudence in the field of the law of delict. This matter turned on the issue of factual causation in the context of wrongful and negligent systemic omissions by the state. In this case note, I explore the law relating to this element of delictual liability with specific regard to the traditional test for factual causation – the conditio sine qua non (‘but-for’) test. In particular, I note the problems occasioned by formalistic adherence to this test in the context of systemic state omissions as evidenced by the SCA judgment in the same matter. I also consider the manner in which English courts have addressed this problem. Thereafter, I analyse the CC’s broader approach to the determination of factual causation as one based on common sense and justice. I argue that this approach endorses a break from a formalistic application of the test and constitutes a step towards an approach which resonates with the foundational constitutional values of freedom, dignity and equality. Furthermore, it presents an appropriate solution to the problems associated with factual causation where systemic omissions are concerned. I then consider the transformative impact of the Lee judgment. In particular, I argue that the broader enquiry favoured by the CC facilitates the realisation of constitutionally guaranteed state accountability, and amounts to an extension of the existing norm of accountability jurisprudence. Hence, I contend that the judgment presents a further effort by the Constitutional Court to effect wholesale the constitutionalisation of the law of delict, as well as a vindicatory tool to be used by litigants who have been adversely affected by systemic state omissions.

Automatic Determination of Optimal FIB Operations for Improved Circuit Probing and Fast Reconfiguration

2000 ◽  
Author(s):  
Romain Desplats ◽  
Timothee Dargnies ◽  
Jean-Christophe Courrege ◽  
Philippe Perdu ◽  
Jean-Louis Noullet
Keyword(s):  
Integrated Circuit ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Semiconductor Devices ◽  
Front Side ◽  
Automatic Determination ◽  
Metal Line ◽  
New Approach ◽  
Metal Layers

Abstract Focused Ion Beam (FIB) tools are widely used for Integrated Circuit (IC) debug and repair. With the increasing density of recent semiconductor devices, FIB operations are increasingly challenged, requiring access through 4 or more metal layers to reach a metal line of interest. In some cases, accessibility from the front side, through these metal layers, is so limited that backside FIB operations appear to be the most appropriate approach. The questions to be resolved before starting frontside or backside FIB operations on a device are: 1. Is it do-able, are the metal lines accessible? 2. What is the optimal positioning (e.g. accessing a metal 2 line is much faster and easier than digging down to a metal 6 line)? (for the backside) 3. What risk, time and cost are involved in FIB operations? In this paper, we will present a new approach, which allows the FIB user or designer to calculate the optimal FIB operation for debug and IC repair. It automatically selects the fastest and easiest milling and deposition FIB operations.

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