Design and Implementation of Hopping Frequency Sequences with Given Minimum Gap Based on FPGA

2013 ◽  
Vol 765-767 ◽  
pp. 2641-2646
Author(s):  
Peng Fei Li ◽  
Xiao Chun Ma ◽  
Jia You Song
Keyword(s):  
System Performance ◽  
Large Scale ◽  
Design Method ◽  
Simulation Software ◽  
Matlab Simulation ◽  
Software Analysis ◽  
Design And Implementation ◽  
Program Function ◽  
Design Idea ◽  
Scale Design

In order to design given minimum gap hopping sequences based on dual sub-bands for technology requirement, with Matlab simulation software analysis and optimize system, performance and design idea of hopping sequences of given minimum gap is expounded. The design method based on hardware of given minimum gap hopping sequences based on dual sub-bands is given. System software uses Quartus II8.0 platform and VHDL language. The language has fine characteristics of transplantation, long lifecycle, powerful description and support large scale design and logic unit recycled. The design has parameter adjustment repeating program function and reference application value in design of hopping-frequency communication hardware.

The Effects of Particle Size-Matching Filling of Spherical Silica on the Flowability of Epoxy Molding Compounds for Large-Scale Integrated Circuits Packaging

2011 ◽  
Vol 194-196 ◽  
pp. 1524-1528 ◽  
Author(s):  
Ming Shan Yang ◽  
Lin Kai Li ◽  
Yang Liu
Keyword(s):  
Particle Size ◽  
Integrated Circuits ◽  
Large Scale ◽  
Simulation Software ◽  
Classical Particle ◽  
Matlab Simulation ◽  
Molding Compounds ◽  
Particle Accumulation ◽  
Spherical Silica ◽  
Twin Roll

By means of matching filling of five kinds of spherical silica with the particle size of 2μm, 3μm, 5μm, 10μm, 20μm respectively, the epoxy molding compounds(EMC) for integrated circuits(IC) were manufactured. Using classical particle accumulation theory, the particle distribution according with Dinger-Funk-Alfred equation was calculated by Matlab simulation software, and then the optimal particle size formulations were obtained. Adding the mixed silica according to the above optimal formulations into epoxy resin, the EMCs were manufactured by twin-roll compounding at 95~105°С . The melt viscosities of varied EMCs were measured by Rotating Rheometer. The results showed that the matching filling of different silica with different particle size can improve the flowability of EMC greatly.

Design and Implementation of Large-Scale Computer Vision Positioning Software

2014 ◽  
Vol 556-562 ◽  
pp. 5744-5747
Author(s):  
Ting Hong Gao
Keyword(s):  
Computer Vision ◽  
Pattern Recognition ◽  
Design Process ◽  
Large Scale ◽  
Design Method ◽  
Test Method ◽  
Visual Positioning ◽  
Design And Implementation ◽  
Pattern Recognition Methods ◽  
Vision Positioning

This paper presents a design method of large-scale visual positioning software combining embedded technology and software algorithm. The design process and implementation ideas of hardware and software are given, and the pattern recognition methods are utilized for accurate positioning of the target. The test method is to utilize the proposed system to process visual positioning recognition of airport obstacles. The experimental results show that the system can effectively improve the accuracy of recognition, thus ensuring the aircraft can evade the obstacle accurately in the process of running on the runway, and achieved satisfactory application results.

Design and implementation of large space radio telescope antenna

2018 ◽  
Vol 07 (01n02) ◽  
pp. 1850008 ◽  
Author(s):  
Xiaofei Ma ◽  
Bo Gao ◽  
Huanxiao Li ◽  
Fan Liu ◽  
Tuanjie Li
Keyword(s):  
High Precision ◽  
Large Scale ◽  
Design Method ◽  
Mesh Optimization ◽  
Test Results ◽  
Key Factors ◽  
Large Space ◽  
Space Radio Telescope ◽  
Design And Implementation ◽  
Precision Design

The design of large high-precision antenna is one of the key factors restricting the application and development of antenna. This paper presents a design method for high precision large-scale umbrella-shaped antenna. Studies have been performed on the configuration, cable net forming, mesh optimization, error analysis and rib design to achieve the high precision design. Then, a high-precision umbrella antenna prototype is designed and manufactured based on this method. Finally, the test results of the prototype proved the correctness and feasibility of the proposed method.

The Boeing 787 Dreamliner--A case study in large-scale design integration

2008 ◽  
Author(s):  
D. L. McMullin ◽  
A. R. Jacobsen ◽  
D. C. Carvan ◽  
R. J. Gardner ◽  
J. A. Goegan ◽  
...  
Keyword(s):  
Large Scale ◽  
Design Integration ◽  
Scale Design

scholarly journals Design of a Variable-Stiffness Compliant Skin for a Morphing Leading Edge

2021 ◽  
Vol 11 (7) ◽  
pp. 3165
Author(s):  
Zhigang Wang ◽  
Yu Yang
Keyword(s):  
Composite Laminate ◽  
Large Scale ◽  
Design Method ◽  
Leading Edge ◽  
Variable Stiffness ◽  
Manufacturing Constraints ◽  
Aircraft Wing ◽  
Noise Abatement ◽  
Civil Aircraft ◽  
Final Profile

A seamless and smooth morphing leading edge has remarkable potential for noise abatement and drag reduction of civil aircraft. Variable-stiffness compliant skin based on tailored composite laminate is a concept with great potential for morphing leading edge, but the currently proposed methods have difficulty in taking the manufacturing constraints or layup sequence into account during the optimization process. This paper proposes an innovative two-step design method for a variable-stiffness compliant skin of a morphing leading edge, which includes layup optimization and layup adjustment. The combination of these two steps can not only improve the deformation accuracy of the final profile of the compliant skin but also easily and effectively determine the layup sequence of the composite layup. With the design framework, an optimization model is created for a variable-stiffness compliant skin, and an adjustment method for its layups is presented. Finally, the deformed profiles between the directly optimized layups and the adjusted ones are compared to verify its morphing ability and accuracy. The final results demonstrate that the obtained deforming ability and accuracy are suitable for a large-scale aircraft wing.

scholarly journals Optimal Design of Novel Blade Profile for Savonius Wind Turbines

Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3484
Author(s):  
Tai-Lin Chang ◽  
Shun-Feng Tsai ◽  
Chun-Lung Chen
Keyword(s):  
Wind Energy ◽  
Drag Force ◽  
Wind Turbines ◽  
Rural Areas ◽  
Large Scale ◽  
Design Method ◽  
Angular Position ◽  
Vertical Axis ◽  
Blade Profile ◽  
Main Concept

Since the affirming of global warming, most wind energy projects have focused on the large-scale Horizontal Axis Wind Turbines (HAWTs). In recent years, the fast-growing wind energy sector and the demand for smarter grids have led to the use of Vertical Axis Wind Turbines (VAWTs) for decentralized energy generation systems, both in urban and remote rural areas. The goals of this study are to improve the Savonius-type VAWT’s efficiency and oscillation. The main concept is to redesign a Novel Blade profile using the Taguchi Robust Design Method and the ANSYS-Fluent simulation package. The convex contour of the blade faces against the wind, creating sufficient lift force and minimizing drag force; the concave contour faces up to the wind, improving or maintaining the drag force. The result is that the Novel Blade improves blade performance by 65% over the Savonius type at the best angular position. In addition, it decreases the oscillation and noise accordingly. This study achieved its two goals.

scholarly journals An Intelligent Adaptive Neural Network Controller for a Direct Torque Controlled eCAR Propulsion System

2021 ◽  
Vol 12 (1) ◽  
pp. 44
Author(s):  
Gururaj Banda ◽  
Sri Gowri Kolli
Keyword(s):  
Neural Network ◽  
Pulse Width Modulation ◽  
Simulation Software ◽  
Propulsion System ◽  
Torque Control ◽  
Matlab Simulation ◽  
Time Data ◽  
Adaptive Neural Network ◽  
Adaptive Controllers ◽  
Neural Network Controller

This article deals with an intelligent adaptive neural network (ANN) controller for a direct torque controlled (DTC) electric vehicle (EV) propulsion system. With the realization of artificial intelligence (AI) conferred adaptive controllers, the torque control of an electric car (eCAR) propulsion motor can be achieved by estimating the stator reference flux voltage used to synthesize the space vector pulse width modulation (SVPWM) for a DTC scheme. The proposed ANN tool optimizes the parameters of a proportional integral (PI) controller with real-time data and offers splendid dynamic stability. The response of an ANN controller is examined over standard drive cycles to validate the performance of an eCAR in terms of drive range and energy efficiency using MATLAB simulation software.

Numerical Simulation and Experimental Study on Water Mist Fire Suppression for Cooking Fog Discharge Pipe

2014 ◽  
Vol 915-916 ◽  
pp. 356-361
Author(s):  
Zheng Wen Xie
Keyword(s):  
Design Method ◽  
Fire Suppression ◽  
Orthogonal Design ◽  
Water Mist ◽  
Simulation Software ◽  
Droplet Radius ◽  
Test Analysis ◽  
Injection Angle ◽  
Fire Extinguishing ◽  
Flow Quantity

FDS simulation software was used to establish the full size lampblack physics model of single wind pipe, using the orthogonal design method design of analog calculation conditions, research in the nozzle pressure, the droplet radius, nozzle, flow quantity and injection angle parameters under different conditions of water mist fire extinguishing effect. Based on a full-scale combustion and water mist fire extinguishing experiment, the water mist fire suppression was observed and test analysis etc, to better understand the flue water mist fire extinguishing feasibility, provides the theory basis for the design of efficient, reliable flue fire extinguishing system.

The Finite Element Analysis of the Large-Scale Converter Transformer Valve Side of the Electric Field

2013 ◽  
Vol 325-326 ◽  
pp. 476-479 ◽  
Author(s):  
Lin Suo Zeng ◽  
Zhe Wu
Keyword(s):  
Finite Element ◽  
Electric Field ◽  
Large Scale ◽  
Calculation Model ◽  
Simulation Software ◽  
Field Calculation ◽  
Element Analysis ◽  
Ansys Simulation ◽  
The Finite Element Analysis ◽  
Electric Field Calculation

This article is based on finite element theory and use ANSYS simulation software to establish electric field calculation model of converter transformer for a ±800kV and make electric field calculation and analysis for valve winding. Converter transformer valve winding contour distribution of electric field have completed in the AC, DC and polarity reversal voltage.

Crash Test Software Analysis

2002 ◽  
Author(s):  
Justin F. Harrison ◽  
Ionut Radu ◽  
Alan J. Babcock ◽  
Beth A. Todd
Keyword(s):  
Automotive Industry ◽  
Simulation Software ◽  
Crash Test ◽  
Software Analysis ◽  
Design Engineers ◽  
Software Packages ◽  
The Disabled ◽  
Safety Features ◽  
Physical Construction ◽  
Advanced Computer

The development of highly advanced computer simulation software packages has enabled design engineers to more effectively integrate safety features into their designs. Designs can be tested long before any physical construction ever begins. This saves money, allowing more extensive testing to be performed, and it also saves time, expediting the process of moving concept to reality. In the automotive industry, such software can be especially useful, since computer simulations can be run over and over again, making it possible to observe the effects of adjusting single variables in dynamic situations. This has opened the door for testing of non-typical occupants. Restraints and safety devices are no longer designed to suit the needs of the average person; they can be tailored to account for all body types, or even for the disabled.

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