The Design and Implementation of Experimental Apparatus of Magnetic Levitation

2013 ◽  
Vol 389 ◽  
pp. 638-641
Author(s):  
Li Zhu Xiao ◽  
Zhong Xie ◽  
Zhi Jian Gou ◽  
Zhi Hong Li ◽  
Zheng Wei Ou
Keyword(s):  
Theoretical Analysis ◽  
Permanent Magnet ◽  
Magnetic Levitation ◽  
Position Sensor ◽  
Design And Implementation ◽  
Experimental Teaching ◽  
Experimental Apparatus ◽  
Photoelectric Sensor ◽  
Moving Conductor ◽  
The Relationship

Completed the design of experimental apparatus of magnetic levitation based on ADuC832 microcontroller and discussed the experimental results, the relationship between the forces on permanent magnet and the velocity of non-ferromagnetic conductor can be measured with strain gauge position sensor and photoelectric sensor. A magnet can be non-contact driven to rotate around its central axis by moving conductor, the relationship between the rotational speed of permanent magnet and the velocity of conductor can measured with bias circuit, verifying the correctness of the theoretical analysis. The experimental apparatus of magnetic levitation is well applied in experimental teaching.

Analysis of magnetic force and dynamic characteristic for non-contact permanent magnet linear drive device

2020 ◽  
Vol 64 (1-4) ◽  
pp. 1337-1345
Author(s):  
Chuan Zhao ◽  
Feng Sun ◽  
Junjie Jin ◽  
Mingwei Bo ◽  
Fangchao Xu ◽  
...  
Keyword(s):  
Finite Element ◽  
Permanent Magnet ◽  
Dynamic Characteristic ◽  
Driving Force ◽  
Magnetic Circuit ◽  
Response Speed ◽  
Computation Method ◽  
Element Analysis ◽  
Element Simulation ◽  
The Relationship

This paper proposes a computation method using the equivalent magnetic circuit to analyze the driving force for the non-contact permanent magnet linear drive system. In this device, the magnetic driving force is related to the rotation angle of driving wheels. The relationship is verified by finite element analysis and measuring experiments. The result of finite element simulation is in good agreement with the model established by the equivalent magnetic circuit. Then experiments of displacement control are carried out to test the dynamic characteristic of this system. The controller of the system adopts the combination control of displacement and angle. The results indicate that the system has good performance in steady-state error and response speed, while the maximum overshoot needs to be reduced.

Microprocessor Architecture Era for Development Cloud Computing of Ministry of Electricity and Energy of Egypt

2014 ◽  
Vol 13 (12) ◽  
pp. 5199-5209
Author(s):  
Heba A. El-Khobby ◽  
Mostafa M. AbdElnaby ◽  
Abdel-Aziz Ibrahim Mahmoud HASSANIN ◽  
Abdallah D. Maziad
Keyword(s):  
Information Technology ◽  
Cloud Computing ◽  
Theoretical Analysis ◽  
Organization Structure ◽  
Fixed Time ◽  
Organization Structures ◽  
Competence Evaluation ◽  
Competency Based ◽  
Services Evaluation ◽  
The Relationship

A development and evaluation the Cloud Computing (ClComp) of Ministry of Electricity and Energy of Egypt (MEEE) is presented in this paper. In order to be able to judge whether the ClComp of MEEE is competence, there is a need to develop criteria which performance can judged. Competency based standards and the ability to perform the activities within an occupation to the standard expected in the organization structure are presented. The key objective of Cloud Computing is to integrate Authorized Groups (AuthGs) development with the needs of the organization structures of MEEE. The ClComp of MEEE was developed jointly between the telecommunication information technology and ClComp services. Evaluation enables participant to distinguish between AuthGs centered view and a customer centered view of cloud computing of MEEE is competence evaluation. Recognize the main types of evaluation, explain the purpose of evaluation compare the approaches to cloud computing evaluation and review the relationship between the process and policy of evaluation are investigated. Microprocessor architecture presented an optimistic view of multicore scalability to develop the ClComp. Moreover this paper investigates the theoretical analysis of multiprocessor developing and scalability. The analysis was based on the laws of Amdahl's, Gustafson's, Hill's and Marty for fixed-workload condition. Moreover, challenged the difficulties to develop better cloud computing is taken into account. Also, multicore analysis of ClComp scalability, performance and power under fixed-time and memory-bound conditions are studied. These results complement existing studies and demonstrate that ClComp architectures are capable of extensive scalability and developing.

scholarly journals Movement Control Method of Magnetic Levitation System Using Eccentricity of Non-Contact Position Sensor

2021 ◽  
Vol 11 (5) ◽  
pp. 2396
Author(s):  
Jong Suk Lim ◽  
Hyung-Woo Lee
Keyword(s):  
Motor System ◽  
Control Method ◽  
Magnetic Levitation ◽  
Movement Control ◽  
Position Sensor ◽  
Semiconductor Wafer ◽  
Control Command ◽  
Levitation System ◽  
Magnetic Levitation System ◽  
Contact Position

This paper presents a method of utilizing a non-contact position sensor for the tilting and movement control of a rotor in a rotary magnetic levitation motor system. This system has been studied with the aim of having a relatively simple and highly clean alternative application compared to the spin coater used in the photoresist coating process in the semiconductor wafer process. To eliminate system wear and dust problems, a shaft-and-bearing-free magnetic levitation motor system was designed and a minimal non-contact position sensor was placed. An algorithm capable of preventing derailment and precise movement control by applying only control without additional mechanical devices to this magnetic levitation system was proposed. The proposed algorithm was verified through simulations and experiments, and the validity of the algorithm was verified by deriving a precision control result suitable for the movement control command in units of 0.1 mm at 50 rpm rotation drive.

Design and implementation of a novel interior permanent magnet bearingless slice motor

2021 ◽  
pp. 1-1
Author(s):  
Benjamin Stone Weinreb ◽  
Minkyun Noh ◽  
Donald Fyler ◽  
David Lippincott Trumper
Keyword(s):  
Permanent Magnet ◽  
Design And Implementation ◽  
Interior Permanent Magnet

From self-evident norms to contingent couplings: A systems-theoretical analysis of changes in the relationship between schools and the function systems in Denmark

2021 ◽  
pp. 147490412110097
Author(s):  
Niels Åkerstrøm Andersen ◽  
Justine Grønbæk Pors
Keyword(s):  
Theoretical Analysis ◽  
Education System ◽  
Teaching Profession ◽  
School Governance ◽  
World Society ◽  
Historical Account ◽  
And Function ◽  
The Relationship ◽  
Point Of Departure

Taking a point of departure in the paradoxical fact that the increase in educational knowledge leads to an increase in uncertainty for educational organisations, this article explores how uncertainty and contingency have increasingly become an integral part of school governance. The article draws on Niklas Luhmann’s theory of ‘World Society’ as a functional differentiated society providing a range of different symbolic media for educational organisations. To trace the increase in the complexity of governing, we provide a historical account of the shifting couplings between schools and function systems. We show how the school becomes linked to an increasing number of symbolic media so that education becomes only one out of many other concerns. The article studies the consequences these shifting couplings have for how schools are governed and how they are expected to self-manage their relationship to different function systems. The article adds to existing studies of how education has become more and more differentiated with the argument that this has also led to new forms of couplings between schools and the education system with a number of important implications for the teaching profession.

scholarly journals [Ir]rationality, Happiness, and Benefit-Cost Analysis: Introduction to the Special Issue

2016 ◽  
Vol 7 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Lisa A. Robinson
Keyword(s):  
Cost Analysis ◽  
Behavioral Economics ◽  
Policy Design ◽  
Well Being ◽  
Special Issue ◽  
Benefit Cost Analysis ◽  
Design And Implementation ◽  
Societal Welfare ◽  
Benefit Cost ◽  
The Relationship

Behavioral economics and happiness research have many important implications for the conduct of benefit-cost analysis as well as for policy design and implementation. By identifying ways in which we may act irrationally and providing new perspectives on the relationship between our circumstances and our sense of well-being, this research raises numerous questions regarding the evaluation of individual and societal welfare and the desirability of alternative policies. In this special issue, we present a series of articles that explore these concerns and provide significant new insights.

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