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.
This paper proposed the method that AC power transformed DC power of dynamic braking by three-phase bridge type diode rectifier and step-down chopping, it mainly applied to three-phase asynchronous motor dynamic braking on the occasion that requiring smooth braking and frequent starting and braking. This paper briefly expounded the principle of three-phase asynchronous motor dynamic braking and three-phase...
Detection and reliability of remanufacturing automatic transmission is an important step in the remanufacturing process, the article draws attention to the vibration detection system based on BP neural network. By means of extracting the time-domain characteristic data which are taken as inputs for neural network training, a new detection of remanufacturing is realized. Based on an example of the...
Though safety of the power supply has been paid close attention to, most of the urban rail transit failures at present result from the power failure. The paper, which focuses on the global control, proposes an emergency self-traction system with the purpose of wisely utilizing the power reserved in energy saving system for rational emergency self-traction when power supply breaks down. The strategy...
In this paper, the collected infrasound signals were analyzed and disposed based on MATLAB, by signal processing technology. In the way, we have got the data of infrasound transmission characteristic which is the same frequency but different sound pressure level, which is the same direction but different distance and which is the same sound pressure level but different frequency. These data is very...
In order to automatically analyzing general circuits, a software system known as “General Circuit Analysis Platform” is developed with Matlab programming in this paper. This system consists of six parts including five general circuit analyzers and one multi-calculator. The fundamental theory with node-listing method used to develop the system is presented. The matrix equation describing the circuit...
As powerful and practical engineering software, MATLAB is used in data analysis and processing widely. This paper describes an example of separating noise from the raw speech. Firstly, high frequency noise is added to the speech signal. And then the principle of short time Fourier transform is analysis. Finally, a filter is designed to process the actual acquisition of a voice signal with noise. It...
According to the principle of generating-forming method, this thesis introduces a method of addendum lines' chamfering for the driven gear in spiral bevel gear pair. The mathematical model of addendum lines' chamfering is proposed and the equations of chamfering trace are deduced. The problem is transformed into constrained optimization, which can be solved by the use of the MATLAB optimization function...
This article provides a new control strategy of parallel regenerative brake system based on the requirement of new energy vehicles, and optimizes the control strategy according to ECE regulations, so that vehicles can use the maximized regenerative braking capability on the premise of ECE regulations. We verify the feasibility and braking performance of the optimized control strategy in MATLAB/Simulink-AMESim...
The analysis software of General dynamic circuit is developed based on GUI programming in MATLAB. For the equation of circuit formed by node-listing method of the circuit theory the popularity and applicability of the circuit analysis is improved. The visualization of the input and output signal, power function transformation and initial value problem can be solved by GUI activex and programming....
The powerful teaching demonstration program was developed quickly based on GUIDE of MATLAB. Taking fourier series of continuous-time signal system as a study case, the paper introduced numerical computation and methods and skills of GUI Programming, the corresponding graphical user interface programs was developed. The time domain and frequency spectrum of system response was displayed for any period...
In this paper, Sigma-Point Kalman Filter(SPKF) has been adopted to estimate the internal states of 18650 lithium-ion battery. An equivalent circuit model of lithium-ion battery has been build. The initial parameters of the model can be calculated through the experimental data of the Hybrid Pulse Power Characterization (HPPC). In addition, the state space equation and output equation based on the circuit...
This paper introduced a new way which utilizes genetic algorithm to optimize neural network weights. And we have worked out the algorithm on ARCGIS and MATLAB platform. Meanwhile, a comprehensive evaluation of environment carrying capacity on Jiulong county has been carried out. The findings and results show that this method can provide a new way to evaluate geological environment, because it can...
The paper introduces the basic method of Monte Carlo simulation, establishes the binary communications system's electric circuit model, and obtains the relational curve of the error rate and the signal-to-noise ratio in the binary communications system with the Monte Carlo simulation method. The result indicates that the bit error rate of the system decreases gradually with the increase of the signal-to-noise...
Based on the static design algorithm for the optimized parameters of the multi-component and two-outlet rare earth cascade extraction with MATLAB, the cascade extraction process parameters can be designed. Nd, Sm, Eu, Gd + heavy rare earth elements-kerosene system cascade extraction dynamic balance is simulated by the experimental operation of analoging “Separating funnel” completely with MATLAB....
The transient signals produced by power system fault can not be analyzed by typical Fourier analysis. Wavelet transform provides an effective tool for non — stationary signals analysis, by its excellent properties in both time domain and frequency domain. The simulation model of a simple fault power system is built in Matlab/Simulink environment. And Wavelet transform (discrete wavelet transform)...
The solar energy collector combining with heat pump is a progressing direction of saving energy. The key technology of the automatic control system is how to setup the control model. According to the character of the input and output variables of the control system, the text setup the fuzzy control strategy aiming at the key variable such as input valve, heat pump, heat loop pump and setup the model...
The output of photovoltaic array has several corresponding local peaks of power-voltage curve with the existence of the shadow, In order to make the photovoltaic arrays continue to work in the maximum power point, need to create conditions for the model of the PV array, On the basis of the model, there are having some further detailed analysis and research about the characters of the local photovoltaic...
This paper designs a robust PID controller. And algorithm of H∞ is used in this paper, based on the sensitivity function, input sensitivity function and complementary sensitivity function constituting Mixed sensitivity function. By deriving plural coefficients equation of the controller parameters with stability of the Hurwitz, this paper gives the algorithm of determining stability region of Kp and...
Fuzzy control was used to control a vertical rotary invert-pendulum with single fulcrum due to its complex characteristics in this paper. Movable equation of the inverted pendulum was derived, according to the dynamics analysis method of Lagrange. By system feasible approximation, an easily analytical math model was deduced. At the same time, the fuzzy logical tool package of MATLAB was used to build...
Electromagnetism drive is launcher which utilizes magnetic traveling wave produced by impulse or alternating current to drive projectiles with coil or magnetic material, essentially is a linear electric motor. The heat wasting affect coil gun's efficiency and capability, high temperature of driving coil will reduce its life, indeed burnout coil, and when enhancing firing rate, we need calculate effect...
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.