This paper presents a comparative analysis of different control strategies applied to a two-link robotic manipulator. Robot control is crucial when it comes to real-time implementation of the control algorithms, hence...
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This paper presents a regulated 24V-to-1V series-capacitor buck converter to achieve single-stage high step-down dc-dc power conversions with high efficiency and high power density. Many of the challenges faced by con...
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In this paper, a novel substrate integrated waveguide (SIW) loaded with double-sided complementary spiral resonators (DS-CSRs) is investigated and its applications to the miniaturized bandpass filters will be presente...
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Volume of Fluid (VOF) is used to compute the flow of fluids past arbitrarily shaped solid objects using Cartesian grids. The approach allows one to handle both stationary and moving boundaries with at least second ord...
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ISBN:
(纸本)1853128643
Volume of Fluid (VOF) is used to compute the flow of fluids past arbitrarily shaped solid objects using Cartesian grids. The approach allows one to handle both stationary and moving boundaries with at least second order accuracy at the boundary. The scheme uses a basic finite-difference scheme on a staggered grid, which can be enhanced to higher order using defect corrections. The boundary treatment is done by a variant of the Volume of Fluid (VOF) method. The VOF approach is employed only in cells that are affected by the boundary. The grid system includes option of locally refined grids. The system of equations is solved using a multi-grid method that utilises the global and local grid structure. The current implementation eliminates the problem of slow convergence due to the irregular cells at and near the boundaries. The numerical scheme is tested and evaluated first for a simple problem;namely the Stokes flow past a sphere. The results confirm the second order behaviour for smooth surfaces. A more difficult problem is the laminar pipe flow with an area constriction. Different Reynolds numbers are considered and the results are compared to those obtained using a standard body-fitted solver. The real advantage of the method is demonstrated for a flow past a rotating propeller placed in a square channel.
In recent years, simulation systems of the emergency evacuation have been proposed. It is required for the development of the simulation systems to verify them by comparing the results of the simulation with the actua...
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In this paper, a 2.4 GHz Low Noise Amplifier (LNA) at 180nm CMOS technology is presented. This LNA design involves two stages, the common source cascade, and the cascode stage. The proposed circuit improves the noise ...
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Court Ledger is an open-source blockchain application created to modernize and protect the administration of court data. The blockchain's immutability and invulnerability are put to use here to keep court document...
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Fault diagnosis systems are essential in precision mechatronics to facilitate maintenance and to minimize downtime. The aim of this paper is to describe the current trend in control for precision mechatronics and the ...
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Multilevel inverters are costly when it employs a higher number of dc sources and power semiconductor switches. This paper suggests a topology which uses one dc source, and three self-balanced capacitors and six switc...
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In this paper, based on the multi-loop theory, the voltage and flux linkage equations of the induction motor are deduced. By the new Park's transformation method for multi-rotor-phase system presented in this pape...
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ISBN:
(纸本)0863413285
In this paper, based on the multi-loop theory, the voltage and flux linkage equations of the induction motor are deduced. By the new Park's transformation method for multi-rotor-phase system presented in this paper, the voltage and flux linkage equations are transformed in rotor-reference-frame. Now, the rotating EMF emerges in the voltage equations and the electrical inductance matrix is constant which makes it possible to construct the induction motor model in electromagnetic transient program such as ATP and EMTP. The torque equation is modeled with RC circuit. The electromagnetic torque and the mechanical torque are taken as plus and minus current source injecting the circuit respectively. The multi-loop equations in rotor-reference-frame are modeled with impedance coupling network. The voltage source that simulates the rotating EMF and the current source that simulates the electromagnetic torque are modeled in the MODELS of ATP. Then a new model to analyze the induction motor's squirrel cage broken bars and rings faults is developed in ATP and the faults' simulation methods are also given. The model can be used as a powerful tool to analyze the effect of broken bars and rings faults to large induction motor performances for the investigation of new diagnostic and protective methods, which has the advantages of strong practicability and conceptual clearness. Furthermore, the model can be used as a complete module of ATP. The simulations on a real motor are given and the results prove the effectiveness of the model.
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