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An isosceles right Triangular Microstrip Antenna (TMA) is investigated here for triple band application. Simple cavity model theory is used to investigate the isosceles 45°–45°–90° TMA. Two different isosceles 45°–45°–90° TMAs are demonstrated for triple band dual polarized antenna. Finite Element Method (FEM) based commercially available numerical 3D EM simulator HFSS is also used here to verify...
The problem of scalable and optimal behavior-style description of the binary encoder implementation into FPGA was examined. The structural synthesis technique of the binary encoder with input requests filtration and error detection circuits, which allow improving FPGA resource utilization in comparison with typical description, was proposed. The results of research and development, which have presented...
This current paper is a continuation of authors' previous paper [1] in which they began to bond induction machines' (IMs) vector diagrams with Finite element method (FEM). Today, as a numerical method, FEM is widely used for magnetic field calculations due to its accuracy and fast experimental prototype modeling. The goal of this paper is to theoretically introduce readers with a new methodology for...
Permanent magnet synchronous machines with high torque density, which is a frequent requirement for high level applications, are characterized by saturation and cross-saturation effects which need to be taken into account in simulation models used for the purpose of control system design or for optimized design of the machine geometry. In this paper three simulation models of permanent magnet machines...
This paper studies the influence of three volute geometries of a single-stage centrifugal compressor, using the same vaned diffuser and impeller, the only differences are given by the volute geometry: cross section area and volute tongue. The objective of this research is to determine which of parameters has a major impact on the compressor and how much are the operating range and overall performance...
It is very important to analyze the dynamic characteristics for the crankshaft during the working process. By use of ANSYS software of finite element model of the crankshaft modal analysis to get the top 20 order natural frequency and the corresponding vibration mode, and put forward the possible resonance risk and design concerns. It has some guiding significance for the design and manufacture of...
The characterization of transducers ultimately play an important role in determining the quality of the image. Electrical impedance, pulse-length, bandwidth, and sensitivities are parameters commonly used to characterize the transducer. An achievement of this paper is that these parameters of two single transducers one element have been characterized by combining the measurement results in pulse-echo...
This paper presents a finite element model of the spine lumbar segment equipped with a dynamic implant. The aim of this study is to develop a numerical tool that allows engineers to test different design solutions and to understand the behavior of the implant and its influence on the spine, in particular the implanted and the adjacent segments. The first simulations allowed the visualization of strains...
Side reservoir can improve electromigration (EM) lifetime of copper interconnects. In this work, finite element method (FEM) simulations for interconnect structures with cathode end-of-line reservoir and side reservoir respectively have been conducted to study the side reservoir effects on EM lifetime. It is demonstrated that side location is most likely to have void failure and side reservoir can...
The paper proposes an optimized geometry for a DC electromagnet combining the experimental design (DOE) and FEM. The optimization problem takes into account three geometrical parameters (coil shape ratio, support thickness ratio and support height ratio) and consists in maximization of the acting force related to the largest air-gap, preserving the global dimensions of the device (external radius,...
Generally three phase motors are better than single phase motors but three phase system cannot be used in many applications for house. Especially single phase motors are used in city centers because of structure of the single phase feeder system. In general, small powered single phase motors in the range of 0.18–1.5 kW are used in small workplaces, portable hand looms, homes, fans, kitchen equipment,...
The stress and displacement fields of a piston are calculated with temperature-structure field coupling by The finite element software ANSYS, Contact boundary conditions are employed in using FEM software ANSYS, the results can be provided a reference for improving the design.
The brake drum is inevitably accompanied with vibration during its operation process, so it is particularly important to study its dynamic characteristics. In this paper, the modal analysis of the brake drum was carried out, and the first 12th natural frequencies and associated shapes of vibration were computed. In addition, the probable resonance risk and design hidden troubles were pointed out,...
The problem of the greatest possible increase in a torque and output power of switched reluctance motor by increasing phase currents and optimization of switch-on, switch-off angles, and the interval of the phase short-circuit is considered. Results of numerical calculations of a magnetic field and based on them dependences of magnetic flux and torque on phase current and rotor turn angle show that...
In the operation of bulldozer, the working device bears various complex loads, which raise higher demands on the rationality of the structural design, the convenience of the operation, the durability and the reliability of the working device. The finite element method is used to analysis the structural strength and the fatigue life of the working device. The dangerous points, stress, strain distribution...
In order to obtain the natural frequency and the vibration mode of rectifier cabinet for nuclear power generating stations, the vibration theory of the structural morphology is elaborated, the natural frequency of the cabinet is researched, and the finite element model of the cabinet is set up by ANSYS. The natural frequency and the vibration mode of the rectifier cabinet for nuclear power generating...
Wearable devices such as prosthetics, exoskeleton, robotic manipulator, orthosis are necessary for training rehabilitation process for disabled people. They require a compact size, a light weight and a safe interact between people and equipment. This paper proposes a design and analysis of a new gear-driven compliant torsional spring for rehabilitation device of an upper limb. The device consists...
In this paper, a formulation based on the method of moments is used to compute the capacitance and external inductance of bare and insulated cables used in overhead lines considering proximity effects. The considered formulation is more rigorous than routines available in electromagnetic transient simulators for the calculation of cable parameters, in which proximity effects are not taken into account...
The lifetime prediction of LED lighting system is important to guide the designers to fulfill the design specifications and to benchmark the cost-competitiveness of different lighting technologies. Currently, the lifetime of LED system is usually predicted from the source part and the driver part separately, and then the thermal design is also optimized independently. In practice, the LED source and...
In this paper, a semi-analytical modeling method is applied to a Doubly Salient Permanent Magnets machine. This machine is characterized by a rotor carrying a large number of teeth. It is suitable to applications requiring high torque and low speed. A Reluctance Network is used in order to model the machine with a good compromise between accuracy and simulation duration. Moreover, the antisymmetric...
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