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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...
Through tests several kind of paper's whiteness and glossiness, and use of digits printing press printed sample, yellow, magenta, Cyan on Several paper were tested in the coloring effect. Through the excel software process data and get charts, and analysis of paper whiteness, gloss and color effect of the relationship between replicate. Obtain a different paper coloring of color wheel chart. According...
To complexity design on wind turbine drive train, a design method of configuration based on decision table was introduced. Firstly, according to constraint rules, configuration knowledge base is constructed. Secondly, rules are extracted from the base by configuration engine and then the part cases are generated. Thirdly, configuration model is matched with customer requirement. Finally configuration...
In the maize growing season, weather disasters, which restricts high and stable yield of maize. For maize farmers may encounter in a variety of disasters, disaster resilience cultivation techniques needed to develop resilience reduction of maize cultivation technology query software, the software is based on XML data exchange technology to. NET Framework as a basis for the environment, the choice...
Framework of 4-axis stepper motor control system was constructed based on the characteristics of TC5540 motion controller in this paper, and then the wiring diagram for TC5540, stepper motor diver and 4-axis stepper motor was designed and implemented. From the example, it can be demonstrated that the control system can be worked by programming. The proposed control system is effective, flexible, reliable,...
As the heart of Flexography, laser engraving ceramic anilox roll requires that the diameter and depth of each cell is changeable, and the distribution of cell should be 30°-hexagon, 45°-quadrangle or 60°-hexagon. By modulating the laser cavity gain from step way to gradual chang way, the wave modulating technology of high repetition light pulse solves the problem of increasing absorbency of ceramic...
The nonlinear and dead-zone characteristics of proportional decompressing valve affect system's quickness and stabilization, to reach the better performance of proportional decompressing valve's in EHB system, the stabilization need to be improved, and the influence of dead-zone have to be limited. This paper presented the internal model control (IMC) and the dead-zone compensation methods used in...
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...
Latex matrix is a kind of a grease with high viscosity, low heat conductivity of non Newtonian fluid, which is an important intermediate key parameter in the process of the emulsified explosive production. In the present technology condition, there are many difficulties in measuring this parameter in real-time. The design brings forward at first time a measurement of viscosity for latex matrix based...
Using the finite element method, according to the actual size, building an entity model, the finite element simulation was conducted by a series of procedures, such as meshing, applying loads and solving. Then the temperature field and flow field with the three wires structure in the sensitive element were calculated in different tilting states. The results show that a heated hotwire forms definite...
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...
Pipeline is one of the basic techniques to improve the CPU's performance. This paper based on MIPS instruction set, designed a five-stage pipeline CPU. The CPU was implemented with schematic and VHDL language, and verified the CPU core is correct and effective in Quartus II environment.
In this paper, a DC PWM speed regulation system employing SG3525 chip has been described and analyzed. Here, a DC chopper consists of two IGBT (Insulated Gate Bipolar Transistor) was chosen as the main circuit and PI controller was adopted as its speed controller and current controller. The obtained simulation waveforms demonstrate the feasibility and superiority of the speed regulation system.
This paper introduces the principle part of fault diagnosis and automatic reclosing phase selection for TMS320VC5402 digital signal processor as the core of high voltage circuit breaker intelligent releaser. This releaser has the following functions: tripping function; Measurement function; Diagnosis function; Automatic reclosing phase selection function. It To has important practical significance...
An automatically inspecting method is presented to check the abrasion of the coupler with non-contact measurement technology. This paper adopts the method of digital image processing to analyze the coupler illustration. The results indicate that the method presented has good accuracy for engineering measurement.
This paper is aimed at construction the vulnerability appraisal system of geological environment in Lijiang with multi-system evaluation method. Primarily, the synthesis layer of evaluation was divided into the condition of basic resources (impact factor), environmental conditions (stress factor) and the problem of environmental geology (performance factor), and then establishing twelve factors to...
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...
The SPI put forward by Motorola Company is a highspeed, full-duplex, synchronous communication bus, and its simple connect could save resources. More and more IC chips are using this protocol. Based on the wishbone bus interface, we design a high-speed and reusable SPI IP core.
An intelligent suitcase is designed, which can move automatically or can be artificially dragged. With the device of differential mechanism, the suitcase can decelerate, obtain different velocity of the two wheels and sheer off according to the signal of the motor driver. Meanwhile, the transform of automatic control and artificial drag is achieved through the clutch. Electron magnetic brake is equipped...
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