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Due to the increase of the train velocity, the pantograph-catenary arc occurs even more frequently, which results in severe erosion on the pantograph pan and the catenary wire. This leads to a serious threat to the normal operation of the pantograph-catenary system. As the level of the arc erosion has a close relationship with its energy, it is necessary to study the influencing factors and suppression...
In this study, the effect of magnet temperature on speed, current and torque in permanent magnet synchronous motor was investigated. First, the demagnetization curves of Neomag S 28VC class magnet related to different temperatures, which was used for MCS06C41 coded motor of Lenze Company, were approached. A mathematical expression was achieved to calculate the remanence value for any temperature using...
Attitude and altitude control of quadrotor is investigated in this paper. Stable sliding surfaces are used for devising robust control for roll, pitch, yaw motion and altitude. Gao's power rate reaching law is used to devise proposed sliding mode controllers. The robustness of the controllers is verified in simulation. The method is validated in MATLAB simulation. The proposed controller is compared...
Many devices need DC source with low ripple for normal operation. Three-phase bridge rectifiers are most commonly used as the base unit in the source. A simulation model built in MATLAB/SIMULINK is used to analyze the operating of DC source under unbalance mains. The simulation results characterize quality of output voltage versus unbalance of phase voltage.
A low power switching method for SAR ADC is proposed in this paper. With this switching method the comparator first compares the sampled input voltage with Vref/2 to generate the MSB and determine whether to use Vref/2 or Vref as the comparator reference voltage in the following conversation steps, and the DAC with a split capacitor array uses Vref/2 as the reference voltage to generate the remaining...
The DESERT Underwater emulation system (http://nautilus.dei.unipd.it/desert-underwater), originally designed for testing underwater acoustic networks, has been recently extended. The new framework now includes multi-modal communication functionalities encompassing low rate and high rate acoustics as well as optics, the capability of testing wireless telemetry for underwater equipment, a connection...
This paper proposed a novel continuum arm driven by three contractile pneumatic muscles and one extensive muscle. This arm has variable compliance capabilities and low inertia capabilities, which is suited to any field with robot/human interaction. Statics model is proposed, and under different load and position situations using MATLAB software simulation has been done. Simulation results show that...
In this paper, the forward and inverse kinematics of a robot manipulator named RV-M1 are analyzed. The forward kinematic model is based on the DH parameters, and the inverse one is derived in closed form. Then, the interactive simulation system is established using MATLAB software which is one of the most used platforms for the modeling and simulation of robot systems. Finally, the simulation results...
Recently, since the wireless sensor network exhibits powerful performance, it has been frequently used in transmission of information in various fields. However, many problems are gradually revealed in the information transfer process. When wireless sensor networks transmit data packets for communication, the large amount of data makes the transmission very difficult. In the meantime, information...
Current research on the digital controller of digital closed loop fiber optic gyroscope (FOG) is mainly concentrated on integral (I) controller and proportional integral (PI) controller. Little work has been done to improve the performance of the system under dynamic conditions and to reduce the tracking error of FOG under the condition of the ramp angle speed signal input. It is necessary to change...
The aim of this paper is to present a graphical user interface (GUI) toolbox that has been developed for the GridLAB-D simulation platform. The toolbox provides the users with a friendly interface facilitating the design and simulation of experiments related to the operation of the electric power grid. The GUI, which is named MatGridGUI, integrates GridLAB-D platform with the Matlab software functions...
In order to carry out high speed and effective digital image processing, the use of FPGA is a relatively reasonable choice due to the large amount of data in digital image. Thus we need a careful simulation test to verify the correctness of the VHDL code to achieve the corresponding algorithm. It is difficult to achieve the digital image processing algorithm simulation if we rely on the traditional...
Short-term hydro generation optimal scheduling of cascade hydropower stations is a typical nonlinear programming problem that minimizes the deviation between the produced power and the grid requirement while satisfying hydraulic and electrical constraints. In this work, the main objective is to find the optimal hourly water discharge rate of each hydro station in a multi-reservoir system to minimize...
The concept of transform sensing was recently proposed to operate radars which consist of multiple antenna elements, for high efficiency and resolution. Using transform sensing, phase delays between and amplitudes of elements are no longer constant as in conventional phased array radars. The purpose is to produce any type of spatial sensing pattern that can be applied to the space for efficient sensing...
The use of low voltage DC microgrids is a promising concept that makes improvements in power quality and reliability to end users through different control techniques. A coordinated control strategy is addressed within DC microgrid for proper power management between sources and loads and regulation of DC bus voltage. For this; different modes of operation are performed based on state of charge of...
Technical investigations continuously evaluate the possibility to recover significant amount of braking energy. The application normally involve conventional tramways, characterized by several stops in short-range routes. However, this possibility is becoming more and more attractive also when high-speed trains are considered. In fact, braking energy can be recovered during entry in the station, and...
In system-level design, descriptive system models seem to be insufficient in order to perform a system verification which fulfils various stakeholders0 requirements. This fact is accentuated by the increasing complexity of system engineering projects and, as a consequence, the difficulties to deal with both their coordination and trace ability. Even if SysML (System Modeling Language) is considered...
This work investigated nine popular integration algorithms and simulated the DC-DC boost converters, with and without parasitic elements, operating in continuous conduction mode (CCM). The off-line simulations were performed under the Matlab environment. The methodology consisted of firstly, deriving the state-space model of the converter and then deriving its small-signal average model. The average...
Controlling a boost converter having a right-half-plane zero in its transfer function as compared to a buck converter is a difficult task to accomplish. This paper suggests the optimization of the traditional proportional-integral-derivative (PID) control algorithms for the boost converter through the unconstrained nonlinear optimization technique. This reduces the labor for finding out the well-tuned...
The paper deals with modeling and simulation of the event-driven model of the production line G. U. N. T. in real time. The event control was realized by the design of the simulation model which is composed in MATLAB & Simulink and with using blocks from Data Acquisition Toolbox. The simulation event-driven model was designed, realized and tested for supply, transport and sorting of material by...
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