The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this paper, the dynamic characteristics of two types of electromagnetic repulsive force actuators are compared using the simulation of finite element method. The two electromagnetic repulsive force actuators are equipped with a single-sided coil and a double-sided coil respectively. Initially, the construction and theory of each of the electromagnetic repulsive force actuators are discussed. Subsequently,...
This paper proposes an effective electromagnetic analysis method for simulating periodic organic solar structures. The Finite Element Method (FEM) is derived to analyze the Organic Solar Cell (OSC), and the Periodic Boundary Condition (PBC) is enforced on the boundary of the OSC to model the infinite organic solar structure. So that the infinite organic solar structure can be solved by analyzing only...
Electrospinning is an experimental method of the polymer super thin fibres formation by the electrostatic field. The distribution of electrostatic field affects the effectiveness of the electrospinning. In order to analyze the electrostatic field for given technological parameters the 3-D computer model of an electrospinning device is necessary.
This paper presents a diagnosis method of stator inter-turn short-circuits in self-excited power alternators. First, a new way to accurately model power alternators is depicted. Thanks to a co-simulation process between Flux2D and Matlab, this model of a healthy alternator is able to faithfully reproduce the waveforms of the signals in the system and therefore their harmonic contents. This information...
This paper discusses the performance model for practical computational fluid dynamics (CFD) simulation. Based on the analysis of the conventional qualitative model and empirical knowledge in the simulation, a set of practical models for the linear solution in high-order finite element method (FEM) simulation are established: a linear function model for the storage consumption, and a power function...
Integrated circuits (ICs) undergo dimensional reduction and the functional unit of density dramatically increases, the reliability issue becomes more critical, especially with respect to three-dimensional (3D) silicon integration technology. Through-Silicon Vias (TSVs) technology is one of the most prominent feature used for interconnecting between chips. Since TSVs contain interfaces of heterogeneous...
The transport type metal detector balanced differential transmission coil to detect metal particles. In the process of industrial production, other metal production equipment, transmission belt of steel and other external factors are influenced by the test. Repeated experiments can reduce the interference, but will affect the production efficiency, this paper provides a more efficient and effective...
This paper approaches the design using two optimization techniques for a permanent magnet generator used in a micro-wind turbine, with a major importance on the overall performances of the energy conversion system. The proposed micro-wind generator has two armatures and both are rotating in opposite directions.
This paper proposes a right-circle flexural hinge design for enlarging the displacement of bridge-type mechanisms as an alternative to the commonly used inner output type. The proposed design uses the outer side as the output so that it is suitable for some engineering applications with output force. Based on the elastic beam theory, a formula for the right-circle displacement amplification ratio...
In this paper, a model-based contaminant distributed prediction approach based on the combined static nonlinear dynamics and linear dynamics structure is developed to predict the contaminant concentration in environmental fluid diffusion process. Finite element analysis could achieve a near perfect result in computing the contaminant concentration field in predicted water field. However, the finite...
The importance of the mechanical behavior of electronic packages starts at the beginning of the package assembly process and continues through performance testing procedures at different levels. Predicting an electronic package's mechanical performance by simulation is an ongoing challenge and pursuit of both industry and academia. To achieve this goal, advanced simulation or analyses should have...
In this work, we present an analytic and numerical model for energy harvesting of an underwater acoustic spherical sensor. The energy harvester is composed of two half-spheres made of Plexiglas with a PZ26 piezoelectric ring fixed between them. For the analytical model, the piezoelectric ring was modeled using primary thickness and radial vibration modes. For each mode, the ring is described by an...
In combination with the mathematical model and finite element analysis, we carry the research on tower crane structural damage detection method in the load lifting process. The paper takes the laboratory mini tower crane as the study object. First we establish the FEM model of the tower crane under the normal and the damage condition. Then get the dynamic displacement of the normal and the damage...
The prediction of EMI sources in electrical and digital devices is not a simple task. In practice it is difficult to predict all the possible sources of EMI, from even relatively simple devices. This paper reviews and summarizes the possible EMI sources and the numerical electromagnetic modeling techniques that can be used to analyze these sources of electromagnetic interference. Although there are...
Influence of nanoparticles on failure load of adhesive bonded single lap joint was investigated experimentally and by finite element method (FEM). Aluminum alloy and epoxy were used as adherend and adhesive respectively. Alumina nanoparticles having diameter in the range of 23–47 nm were used to reinforce epoxy. Nanocomposite adhesives having 0.5, 1.0, 1.5 and 2.0 wt.% of alumina nanoparticles were...
Panels made with composites are used commonly, especially in automotive and aerospace structures due to their high strength/weight and stiffness/ weight ratio. Lateral impacts by hard body can cause delamination in significant amount, even though the external indication of damage may be a very small surface indentation. This type of damage is called as BVID (barely visible impact damage), and it can...
The control system simulation model is built based on the control system and hardware platform, which can reveal the situation of the actual system. However, it couldn't calculate the motor loss. The finite element simulation can analyze the loss in the all part of the motor, which usually use the ideally current source, neglecting the current harmonic caused by the control system performance, which...
This paper investigates a bridge-type compliant mechanism with elliptical shell for amplified piezoelectric actuators. Compared with the traditional bridge-type mechanism using the notch flexure hinges, this kind of mechanism has advantages of high stiffness, low stress and high resonant frequency. An analytical model for the calculations of displacement amplification ratio and input stiffness is...
The Magnetic Levitation systems (MagLev) have important applications such as: levitation of superconductor materials, high speed transport, power interrupters (used as actuators) and elimination of electric arcs. Therefore, numerical and analytical modeling of MagLev is important. The aim of this work is to obtain the dynamic model of the MagLev with a simple electrical and magnetic treatment. The...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.