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Salisbury screen radar absorber with high resistive surface is unconstrained by the restriction of 1/4 wavelength thickness of medium. EBG structure is an effective approach to realize it. This paper present a new type of Salisbury screen absorber based on one order Minkowski fractal surface with several symmetric patched resistors. Simulation results show that the total thickness is reduced dramatically...
A direct power control (DPC) scheme for three-phase PWM rectifier based on sliding-mode variable structure control theory is presented. Compared with the traditional PI controller, the proposed scheme is much more robust with better transient performance, lower total harmonic distortion (THD) and simpler tuning of parameters. Modeling and simulation done in MATLAB/SIMULINK environment shows that the...
From the linear RLC circuit of impulse current generator, the relations between the parameters T1, T2, im of pulsed current wave and damping coefficient parameters alpha of the circuit ware studies in this paper. The currents parameters of impulse current generator which can generate the standard lightning currents (100kA, 8/20mus and 50kA, 10/350mus) were calculated by using the relations, and simulated...
Dynamic analysis is carried out for recoil parts in recoil and counter-recoil process to find out the fault effects of liquid and gas leakage of recoil brake and recuperator. In order to detect and simulate the fault occurrence and development process, virtual prototyping is firstly adopted into fault simulation and detection fields in this paper. The basic steps of virtual prototyping development...
MAGIC (MAG-netic Intelligent Compound) is a solidified magnetic ferrofluid (MF) containing both magnetic particles (MPs) and abrasive particles (APs, nonmagnetic) of micron size. The distribution of APs in MAGIC can be controlled by applying a magnetic field during cooling process of MAGIC fluid. Due to its lower simulation speed, traditional Stokesian Dynamics method is limited to a small amount...
This paper presents a 30V range `Field Balanced' Split-Gate RSO (Resurf Stepped Oxide) MOSFET showing extremely low Qgd of 1.0 nC mm-2for the first time. By introducing a low doped region on an optimised 30V Split-Gate RSO MOSFET, the Figure of Merit (FOM) improves from 8.09 mOmega nC to around 6.40 mOmega nC. From this investigation, it has been demonstrated that the `Field Balanced' on a a Split-Gate...
This paper presents an improved method of highly accurate supply detection by using a bandgap circuit and its implementation in a comparatively inexpensive BiCMOS process. The process is the vanilla N-well complementary metal oxide semiconductor process technology with added deep N-well and P-well layers. The circuit consisting of a simple bandgap core with a resistance divider produces a supply detection...
A simple design for realizing a single operational amplifier and single variable resistor amplitude equalizer is proposed. It allows the variation within a specified range Rr of the variable resistor and can achieve the flat response at a specified value Rf of the same resistor with a restriction Rr > 2Rf. The total resistance required is the least and is, therefore, more suitable for economic...
This paper investigates a novel approach for rotor fault diagnosis in asynchronous machines. Empirical mode decomposition (EMD) is applied to the measured start-up current. More specifically, the space vector of the stator start-up current is decomposed into complex intrinsic mode functions (IMFs) in order to analyze the asynchronous machine's transient. It is shown that in the case of rotor fault...
This paper introduces a novel current sense amplifier (CSA) in sub-32nm fully depleted (FD) double-gate (DG) silicon-on-insulator (SOI) technology with planar independent self-aligned gates. A new architecture is proposed which takes advantage of the back gate in order to improve circuit properties. Compared to the reference circuit, the new architecture proves to be faster (21% sensing delay decrease),...
In this paper, a novel gray-level image watermarking algorithm based on local feature region and Singular Value Decomposition (SVD) is presented for copyright protection. A new way which utilizes the Binary Coded Decimal (BCD) method and encodes the gray-level secret information into bit string is used. It employs the singular values of SVD to extract the most valuable features of the watermark image...
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