Applied Mechanics and Materials Vols. 602-605

Abstract: Micro grid can integrate various distributed generators and provide local load with green energy. Therefore, it becomes a hot spot of research in every country all over the world. Due to small inertia, large number of models, big difference among internal electric sources of Micro grid operation, it is more difficult to keep stabilization of voltage frequency of common points in the network, and more complicated to control the problems. The article puts forward the improved droop control strategy based on distributed power supply layer, on the basis of traditional droop control, it increases the feed forward regulation mechanism so as to change the droop coefficient, increase the power regulation scope, speed up the common point frequency voltage stability and improve the control precision, which has realized the specific control of power output when the Micro grid synchronizes and closes, as well as the purpose of power distribution according to load demand for islanding. Finally, we use power system simulation software PSCAD/EMTDC V4.4 to verify the practicability of the proposed scheme.

Abstract: Micromouse is a small autonomous robot, which must navigate itself through an unknown maze and solve the maze information.One of the main challenges for micromouse is to solve the maze after searching and find the optimum path, then the mouse must dash from the start to desitnation in the shortest time possible using its own artificial intelligence without any external source of help. In order to increase its dash speed and stability,detailed design of digital cirucits based on FPGA were given, also with their simulaiton. Results show that digital circuits can check and ensure the reading of encoder, and can change the duty cycle of PWM output.

Abstract: This paper introduces the basic principle of RS codes in OFDM system and the design method of 16 shift registers, finite field multiplicators and adders, on and timing circuit are validated by using of EDA tools Quartus II. Finally, the simulation results is given and demonstrates that a good channel encoding and decoding can be achieved by using FPGA in OFDM system, which can save the cost, shorten the designing cycle , and is convenient to speed up the listing of products, occupy less hardware resources, and comply with the development trend of modern communication.

Abstract: Technology of multi-sensor information fusion is an emerging discipline and its theories and methods have been applied in many research areas. In this paper, the model and structure of multi-sensor information fusion, major technologies and methods of information fusion, theoretical system of information fusion as well as application of information fusion technology are introduced and summarized.

Abstract: Using the principle of electromagnetic induction, we designed the new rotary transformer device which secondary winding can rotate with the prime mover. The device not only achieves the purpose that provides synchronous generator with AC power of exciting side, but also can eliminate the impact of slip ring and carbon brushes fundamentally on the system. The test results of the prototype also show that the design of the rotary transformer described herein is possible.

Abstract: Infrared focal plane arrays (IRFPA) suffer from inherent low frequency and fixed patter noise (FPN). To achieve high quality infrared image by mitigating the FPN of IRFPAs, a novel low-noise and high uniformity readout integrated circuit (ROIC) has been proposed. A correlated double sampling (CDS) with single capacitor method has been adopted in the ROIC design which can effectively reduce the FPN, KTC and 1/f noise. A 4×4 experimental readout chip has been designed and fabricated using the SMIC 0.18 μm CMOS process. Both the function and performance of the proposed readout circuit have been verified by experimental results. The test results show that the proposed ROIC has a good performance in practical applications.

Abstract: The research on 1000kV UHV AC transmission lines is to analysis the electromagnetic field strength around these lines, as well as the electromagnetic energy people absorbed at different distances under the lines. What’s more, suggestions for a further study and standards to improve are provided in the paper.

Abstract: This paper model digital FIR low-pass by using the Toolbox of the DSP Builder in MATLAB and convert to VHDL hardware description language, compile and simulation through QUARTUS II software automatically, download and verified by EPF10K20RC208-4.The design combine MATLAB software with FPGA hardware organic ally and completes the transplant of the FIR low-pass filter.

Abstract: According to the principle of BOOST and working characteristics of current mode PWM control chip UC3842, a drive circuit of injector solenoid valve was designed for high pressure common rail diesel engine, and simulation model of drive circuit was build with full use of Multisim. Through the simulation of that model and the practical application of the circuit, the results of comparison show that the design of injector solenoid valve drive circuit is reliable and can meet the working demands of high pressure common rail diesel engine, which provides a theoretical basis and practical application for hardware design of high pressure common rail diesel engine control unit.

Abstract: To reduce the impact of shaft-rate electric field (SRE) on the concealment of the ship, the SRE related ship electrical equivalent model is established, and the electrical properties are studied based on the analysis of the mechanism of SRE of the ship in this paper. The ship SRE real-time suppression is proposed based on the compensated negative potential and the real-time close-loop system for the ship SRE suppression is designed. The extremely low frequency electric field strength is reduced greatly, and the shaft-rate and its harmonics field are eliminated ultimately. Experimental results show that the ship SRE can be suppressed effectively by the system, and the concealment of the ship is enhanced.