Saneie, Hamid, Nasiri-Gheidari, Zahra, and Tootoonchian, Farid
IEEE Transactions on Energy Conversion. Mar2020, Vol. 35 Issue 1, p271-278. 8p.
FINITE element method, PERMANENT magnet generators, and STATORS
Multi-turn resolvers are employed in the applications that high reliability; high accuracy and absolute position measurement are required, simultaneously. They are basically consisted of two individual resolvers in a common frame. In this paper a novel sinusoidal air-gap length multi-turn resolver is proposed. The rotor shape and the winding configuration are designed to achieve single-speed and multi-speed operations using a single rotor and a single stator core. Furthermore, some constraints are laid down and discussed in such a way that the performance of two resolvers has no interference with each other. All the mathematical calculations are validated using time stepping finite element analysis. Finally, a prototype of the sensor is built and tested. Experimental measurements are used to verify the analytical and finite element discussions. [ABSTRACT FROM AUTHOR]
COMPUTER software, PROTOTYPES, TESTING, COMPUTER simulation, and DESIGN
A prototyping and simulation tool that supports the development of distributed programs is described. This tool, called Jems, forms a part of Jade, a distributed software prototyping environment. The Jade environment provides tools for the design, implementation, debugging, testing, maintenance, and performance analysis of distributed, concurrent programs. Novel features of Jade include the support of: multi-lingual distributed programs; flexible monitoring of inter-process communication; multiple views into executing programs via a window system; graphical animation of executing programs; and the prototyping of distributed software. This paper presents an overview of the Jade environment, describes the distributed software prototyping tool, and outlines the status of the project. [ABSTRACT FROM AUTHOR]
Hosseini, Seyed Mohsen, Agha-Mirsalim, Mojtaba, and Mirzaei, Mehran
IEEE Transactions on Magnetics. Jan2008 Part 1 of 2, Vol. 44 Issue 1, p75-80. 6p. 2 Black and White Photographs, 6 Diagrams, 4 Charts, 5 Graphs.
FINITE element method, MAGNETS, FERROMAGNETIC materials, PROPERTIES of matter, and ELECTRICAL engineering
This paper presents the design, prototyping, and analysis of a relatively small and cheap axial-flux three-phase coreless permanent- magnet generator. The excitation of the machine is done by rectangular flat shaped neodymium-iron-boron magnets. A two-dimensional model of the machine is analyzed with finite-element software to obtain the machine parameters. One special feature of the constructed generator is in the design and prototyping of nonferromagnetic holders to counteract centrifugal forces acting on magnets, especially at high speeds. By implementing the nonferromagnetic holders, one can expect to construct high-speed axial-flux permanent-magnet generators at low cost. [ABSTRACT FROM AUTHOR]
University of Tartu - Faculty of Economics & Business Administration Working Paper Series. 2012, Issue 85, p3-26. 24p. 4 Charts, 1 Graph.
NEW product development, RAPID prototyping, STRATEGIC planning, ECONOMETRICS, and FACTORIES
Investments in design play a potentially significant role in new product development (NPD) although there is little unanimity on the most appropriate or effective design strategy. Previous case-study based studies have identified three alternative design strategies for NPD: design used as a functional specialism, design used as part of a multi-functional team and designer-led NPD. Using data on a sample of Irish manufacturing plants over three periods we are able to examine the effectiveness of each of these three design strategies for NPD novelty and success. Our analysis suggests that design is closely associated with success in NPD performance regardless of the type of strategy pursued. Adopting designer-led NPD, however, is associated with a much greater NPD performance than more functionally-oriented strategies. The effects of design on NPD outcomes are also strongly moderated by other plant characteristics. For example, the beneficial role of design on NPD outputs is only evident for plants which also engage in R&D. Also, while both small and larger plants do gain from using design as a functional specialism and as part of multi-functional teams, the additional benefits of design-leadership in the NPD process are only evident in larger plants. [ABSTRACT FROM AUTHOR]
FINITE element method, SIMULATION methods & models, RESEARCH, PRODUCT design, ORTHOPEDIC braces, ORTHOPEDIC apparatus, SCOLIOSIS treatment, BIOLOGICAL models, COMPARATIVE studies, COMPUTER simulation, KINEMATICS, RESEARCH methodology, MEDICAL cooperation, PELVIS, RIBS (Anatomy), SCOLIOSIS, SPINE, and EVALUATION research
Based on a three-dimensional patient-specific finite element model of the spine, rib cage, pelvis and abdomen, a parametric model of a thoraco-lumbo-sacral orthosis (TLSO) was built. Its geometry is custom-fit to the patient. The rigid shell, pads and openings are all represented. The interaction between the trunk and the brace is modeled by a point-to-surface contact interface. During the nonlinear simulation process, the brace is opened, positioned on the patient and strap tension is applied. A TLSO similar to Boston brace system was built for a right-thoracic scoliotic patient. The influences of the trochanter pad and strap tension on the 3-D geometrical corrections and on the forces generated by the brace were evaluated. The role of the trochanter pad as a lever arm is confirmed by the model. The brace induces a reduction of the lordosis and pelvic tilt. The reduction of the frontal curvature is about 20% for a strap tension of 60 N. Axial rotation does not significantly change and rib hump is worsened. By using an explicit brace model and a contact interface, a more realistic simulation of orthotic treatment of scoliosis can be achieved. The stabilization of the brace on the patient can be represented and less restrictive boundary conditions can be applied. This model could be used to study the effect of design parameters on the brace efficiency. [ABSTRACT FROM AUTHOR]