Design, Modeling and Experiments of 3-DOF Electromagnetic Spherical Actuators - Heidegger and the Corporate World (eBook)

Design, Modeling and Experiments of 3-DOF Electromagnetic Spherical Actuators - Heidegger and the Corporate World (eBook)

The book develops a philosophical foundation to the field of management education using the work of Martin Heidegger as a guiding philosophy. It asks the questions 'what is a corporation?' and 'what is corporate management?' These two questions are foundational for management thought in general and management ethics in particular. Most other academic fields are in some way defined and guided by a philosophical discourse. This philosophical discourse is largely missing in the field of management thought and education. Without this foundation it can never be clear what actually belongs into a certain academic discipline and what does not. It also therefore lacks a sound and well articulated ontological foundation critical for developing approaches to ethical management. This book seeks to fill this gap and consequently represents an interdisciplinary effort between the academic field of management/business administration and philosophy, which is vital for business ethics.Intended as required reading for an elective on philosophy of management that is offered annually at the Wits Business School / University of the Witwatersrand / Johannesburg. The structure of the course will be largely based on the structure of the book.

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Inhaltsangabe

List of Figures.- List of Tables.- 1 Introduction.- 1.1 Background and Motivation.- 1.2 The State of the.- 1.3 Objective and Scope of the Study.- 1.4 Book Organization.- References.- 2 Magnetic Field Modeling.- 2.1 Introduction.- 2.2 Configuration of Rotor Poles.- 2.3 Magnetic Scalar Potential.- 2.3.1 Relations Between H and B for Three Regions.- 2.3.2 Laplace s Equations for Three Regions.- 2.3.3 General Solution of Laplace s Equation.- 2.4 Spherical Harmonic Expansion of M0r.- 2.5 Boundary Conditions.- 2.5.1 Boundary Condition A or Far Field Boundary Condition (BIrjr! Yen = 0, BIq jr! Yen = 0 and BIf jr! Yen = 0).- 2.5.2 Boundary Condition B (BIrjr=Rr = BIIrjr=Rr ).- 2.5.3 Boundary Condition C (HIf jr=Rr = HIIf jr=Rr and HIq jr=Rr = HIIq jr=Rr ).- 2.5.4 Finite Boundary Condition D at r = 0 (BIIIrjr=0 6= Yen , BIIIq jr=0 6= Yen and BIIIf jr=0 6= Yen ).- 2.5.5 Boundary Condition E (BIIrjr=Rb = BIIIrjr=Rb ).- 2.5.6 Boundary Condition F (HIIf jr=Rb = HIIIf jr=Rb and HIIq jr=Rb = HIIIq jr=Rb ).- 2.5.7 Solution of Coefficients x mnI and kmnI.- 2.6 Solutions of Scalar Potential and Flux Density.- 2.7 Simplification of Magnetic Field Model.- 2.8 Summary.- References.- 3 Torque Modeling.- 3.1 Introduction.- 3.2 Formulation of Actuator Torque.- 3.2.1 Torque Generating Component of Flux Density.- 3.2.2 Torque Model for a Single Coil.- 3.2.3 Torque Model for Complete Set of Coils.- 3.2.4 Orientation Dependance of Torque Model.- 3.3 Solution of Inverse Electromagnetics.- 3.3.1 Nonsingularity of the Workspace.- 3.3.2 Minimum Right-inverse Solution of Electromagnetics.- 3.4 Summary.- References.- 4 Prototype Development.- 4.1 Introduction.- 4.1.1 Prototype of PM Spherical Actuator.- 4.1.2 Equations for Actuator Design.- 4.2 Rotor Pole Design.- 4.2.1 Longitudinal Angle a versus a.- 4.2.2 Latitudinal Angle b versus c.- 4.2.3 Rotor Radius Rr versus d4.- 4.2.4 Rotor Core Radius Rb versus d4.- 4.2.5 Relative Permeability mr versus d4.- 4.2.6 Result of PM Pole Design.- 4.3 Coil Pole Design.- 4.3.1 Geometric Parameters of Coil.- 4.3.2 Increase Number of Winding Turns.- 4.3.3 Material of Coil Frame.- 4.4 Stator.- 4.5 Spherical Bearing.- 4.6 Summary.- References.- 5 Experimental Investigation.- 5.1 Measurement of PM Rotor Magnetic Field.- 5.1.1 Flux Density Measurement Apparatus.- 5.1.2 Flux Density Data Processing.- 5.1.3 Visualization and Analysis of Experimental Result.- 5.2 Measurement of Actuator Torque Output.- 5.2.1 Experiment on Torque Generated by a Single Coil.- 5.2.2 Experiment on Torque Generated by Multiple Coils.- 5.3 Summary.- References.- 6 Three Degree-of-freedom Optical Orientation Measurement.- 6.1 Introduction.- 6.2 Operating Principle.- 6.3 Algorithm for Computing Rotation Angles.- 6.3.1 Definition of Coordinate Systems.- 6.3.2 Calculation of Tilting Angles.- 6.3.3 Calculation of Spinning Angle.- 6.4 Experimental Measurement.- 6.4.1 Experimental Measurement on Apparatus 1.- 6.4.2 Experimental Measurement on Apparatus 2.- 6.5 Conclusion.- References.- 7 Conclusions.- 7.1 Accomplishments and Contributions.- 7.2 Recommendation for Future Research.- References.- Index.