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This paper presents the design and analysis of smart antenna systems used for the detection and estimation of correlated radio signals encountered in multipath environments using circular antenna arrays. The MUSIC algorithm along with spatial smoothing is used for this purpose. A Matlab-based graphical user interface (GUI) toolbox is designed specifically for this purpose. The toolbox allows for studying...
This paper presents a study of modeling and simulation of a twelve-pulse circuit rectifier taking into consideration the effects of the voltage source impedance on the commutation angle for the system operating under a balanced and unbalanced three-phase supply. Three conduction modes are formed in this analysis. Based on the source inductances, the converter conduction modes will change including...
By using both language C and MATLAB, this article introduced the five-order Runge-Kutta-Fehlberg method's application in resolving a negative resistance oscillator circuit. Both of the two methods had gotten correct results. Simultaneously, it introduced how to transfer the results which were calculated by language C program to MATLAB. After comparing, it was concluded that both of the two ways had...
This paper presents a MATLAB-based fault analysis of Power Systems with Graphical User Interface (GUI). The objective of the paper is designing a user friendly Graphical User Interface as an educational tool that helps students who are new to the power system area and studying fault conditions of electrical power systems. There are commercial programs and customized toolboxes developed for education...
The paper generalizes the research actuality and developing trend of rudder at home and abroad, demonstrates steady state fit-itself technique of ram-air pneumatic rudder under vacuum conditions. Aiming at dynamic characteristic of the vacuum air, the paper establishes the control moment equation, puts forward the improving measure. The paper establishes flight speed equation of the missile, pressure...
Construction of UHV power grid is the fundamental guarantee to the growing demands of electricity in the future. Six phase transmission lines can evidently improve power transmission density, and many countries pay attention to it. A new method of fault location and phase selection on six-phase transmission lines was analyzed in this paper. The six sequence variables method to analyze the electrical...
Based on elaborating the characteristics of capillary tube air-conditioning system, especially investigated the heat transfer property of this system cooling in summer, and establishes a two-dimensional mathematical model of steady-state heat transfer. In this paper, the Matlab program programmed by a micro-body heat balance method focuses the impact on the ceiling temperature field and the cooling...
In the development of new digital signal processing algorithms, Designers always use matlab simulation, when the simulation results achieve the expected target, then change the algorithms into C/C++ languages and debug on hardware DSP. There are some results of deviation because of design, precision etc. Such a repeated process of revising all, will give developers inconvenience. This article takes...
This paper presents a novel dead-time elimination method for operating nine-switch converter. The proposed method assumes unique switching cells of nine-switch converter to operate under several subintervals during a fundamental period. Due to the unidirectional conduction characteristics of switching cell, the nine-switch converter can operate without dead-time protection. For a special subinterval...
Generally industrial plants are anticipated to run constantly with full capacity with the aim of to meet the production needs. Abnormalities in the machinery or equipment must be detected and analyzed at the early stage to avoid major problems and cost consumption. Control valves are vital components of process control loops and the condition must be monitored on a regular basis to ensure that the...
Often data sheets provide only poor information about the recovery behavior of ultra-fast diodes. On the other hand, existing diode models do not predict the real characteristic for all diodes. Nevertheless, due to its importance, this behavior needs to be known and therefore measured. For this purpose, a fully automated measurement set-up for determining the reverse recovery characteristic of ultra-fast...
Dc-capacitor voltage drift phenomenon is the main technical issue of an n-level (n>;3) Diode-Clamped Converter (DCC). This paper presents a predictive current control strategy for a three-phase five-level DCC which enables simultaneous control of ac-side currents and balance of capacitor voltages. The paper derives a discrete-time dynamic model of a five-level DCC. Based on the derived model, a...
Aimed at the fluctuate characteristics of isolated wind power system export voltage and frequency, apply the Space Vector Pulse Width Modulation technology, design the control system of small capacity converter. Build the rectifier and inverter model in Matlab/simulink environment and simulated. The results show that the converter base on the control of SVPWM can dampen the wind power system output...
As primary energy source such as coal and oil has been dried up and has bad influence on environment, human urgently need renewable energy which is friendly to environment. So in the future, solar energy will be very important energy source. It is noticeable that the output characteristics of a PV array are influenced by the environment factors, and the conversion efficiency of PV arrays is very low...
This paper presents a thermal circuit model to simulate the behaviour of an electric motor during the transient duty leading to steady-state operation under rated load. The proposed model allows the calculation of the temperature distribution in the radial direction of the electric motor, from the shaft inside to the motor frame surface. Several heat sources inside the motor as well as the heat conduction...
In this paper, details of the designing and implementing voice source simulator using simulink and matlab are discussed. This simulator is an implementation by model-based design concept. Voice source can be analyzed and manipulated through various factors by choosing options from GUI input and selecting the pre-defined blocks or user created ones. This kind of simulation tool can make ease the procedure...
This paper describes a video game for the rehabilitation of the pronation and supination movements of children with cerebral palsy. It is used as an interface for a robot that is currently under development. The game was programmed in LabVIEW and MATLAB is used for analyzing the results. It simulates a formula one racecar on a racetrack. Its objective is to keep the car inside the racetrack's limits...
Advances in databases, computational intelligence, and pervasive computing, which allow “anytime, anywhere” transparent access to information, provide fertile ground for radical changes in pedagogy. Cyberinfrastructure leveraging these technological advances can yield improvements in both instruction and learning, supporting a networked curricular model, facilitating collaboration within and among...
To simplify the modeling process and to increase accuracy and stability of CVT ratio control system, CVT transmission structure and ratio changing theory were analyzed. The mathematical model every part of control system was built. Engine simulation model and CVT object ratio simulation model based on the engine optimal-economy and the optimal-power work mode were built. CVT-vehicle model according...
In order to rank and cluster the economic status of Household Consumption Expenditure in 31 provinces, cities and autonomous regions, the MATLAB software is used and the principal component analysis and the K-M cluster analysis are conducted on the data reflecting the economic status of each area. The results show that the provinces or cities with high comprehensive, scores are Shanghai Municipality,...
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