SIGSO Satellite Tracking Characteristics of Large-Diameter Parabolic Antenna

2013 ◽  
Vol 365-366 ◽  
pp. 1328-1331
Author(s):  
Jun Xia Cui ◽  
Hu Li Shi ◽  
Chang Lv ◽  
Rui Zhu He
Keyword(s):  
Optimization Design ◽  
Large Diameter ◽  
Special Kind ◽  
Beam Width ◽  
System Optimization ◽  
Geosynchronous Orbit ◽  
Actual Measurement ◽  
Parabolic Antenna ◽  
Pros And Cons ◽  
Motion Characteristics

SIGSO satellite is a special kind of geosynchronous orbit communications satellites. Its orbit height is the same as geostationary orbit, but its inclination varies periodically and annually, with variation in the range of 0 ° to 15 °. When communication master station uses large-diameter antenna tracking SIGSO satellites, only a fraction of 1 degree of the antenna beam width is relatively small along with its inclination becomes bigger. Then which kind of tracking mode should be selected to keep precisely pointing to the SIGSO satellite becomes a very important issue. This paper takes Apstar-1 satellite as an example to analyze SIGSO satellites motion characteristics. Pros and cons of a 16-meter antenna with Truss-step tracking Apstar-1 satellite were studied and actual measurement was carried out in Beijing. Finally, mono-pulse tracking and turntable antenna mount is recommended which lays a good foundation for the system optimization design.

Analysis of Turnover Mechanism of the Aluminum Electrolytic Capacitor Assembling Machine

2013 ◽  
Vol 341-342 ◽  
pp. 438-442
Author(s):  
Zhou Zheng ◽  
Bi Zhong Xia ◽  
Yi Ran Liu ◽  
Zhong Dong Ouyang
Keyword(s):  
Dynamic Analysis ◽  
Optimization Design ◽  
Parametric Modeling ◽  
Resultant Force ◽  
Electrolytic Capacitor ◽  
Aluminum Electrolytic Capacitor ◽  
Mechanism Optimization ◽  
Structure And Motion ◽  
Adams Software ◽  
Motion Characteristics

Turnover mechanism is one of the important parts of the element bar conveying subsystem in the aluminum electrolytic capacitor assembling machine (AECAM). This paper analyzed the structure and motion characteristics of the turnover mechanism, and used the ADAMS software to do its parametric modeling, dynamic analysis and optimization design. Finally the paper concluded that Final result of turnover mechanism optimization was that the maximum of resultant force in the cam rotary center decreased by 49.3%.Application of ADAMS software will provide a new way for design and improvement of the assembling machine in future.

Active Monitoring, Machinery Example

2012 ◽  
pp. 217-231
Keyword(s):  
Knowledge Creation ◽  
Optimization Design ◽  
System Optimization ◽  
Technical System ◽  
System State ◽  
Source Information ◽  
Active Monitoring ◽  
Intentional Activities ◽  
Rational Evaluation ◽  
Design Construction

Active machinery monitoring – continuous supervising, diagnosing, managing, controlling, compensating, documenting- is a process of acquiring and transferring streams of information (usually source information) about the analysed object, process, and relations between the same and the environment that can be used to realize the postulated state: knowledge creation (theory and innovation), environment melioration (harmfulness) and technical system optimization (design) - depending on technology needs and engineer imaginations. Knowledge creation comes as result of the creative action (creating). Melioration means the intentional activities of a technical system and boundary zone; activities that enhance, improve, and restore properties of the environment and not only limit technological harmfulness. Optimum comes in property of the machinery design (construction) or system state with respect to the criteria that enable rational evaluation of the state. Active monitoring, investigations into multi-disc grinders, demonstrate that it is possible to acquire knowledge of, describe and utilize, for design and structural purposes, the characteristics that indicate the relations between speeds, idle movement, loads and the indicators of motion variables in the grinding space. The objective of this example is to provide a mathematical description, optimisation of the states and changes in the grinding grains and machine space, their surface and volume during movement (idle and working movement) of the components, and design assemblies in the multi-hole grinding process.

scholarly journals Experimental and Numerical Investigation on the Transport Characteristics of Particle-Fluid Mixture in Y-Shaped Elbow

2020 ◽  
Vol 8 (9) ◽  
pp. 675
Author(s):  
Qiong Hu ◽  
Li Zou ◽  
Tong Lv ◽  
Yingjie Guan ◽  
Tiezhi Sun
Keyword(s):  
Deep Sea ◽  
Pipe Wall ◽  
Large Diameter ◽  
Surface Mining ◽  
Sea Surface ◽  
Mining System ◽  
Fluid Mixture ◽  
High Frequencies ◽  
Motion Characteristics ◽  
Actual Particle

The Y-shaped elbow is used as a connecting pipe between the buffer and the lift pipe in the deep-sea mining system. After being mixed with seawater in the Y-shaped elbow, nodule particles are lifted to the sea surface mining ship via the lift pump. In this paper, we employ a computational fluid dynamics and discrete element coupled method (CFD-DEM) to study the characteristics of particle transport in the Y-shaped elbow. Considering a large diameter of the particles, we discuss the behavior of particles and fluid under different conveying velocities. In addition, the simulation was verified based on the experiment. The results show that the simulation agrees well with the experiment. On this basis, the distribution and motion characteristics of the particles in the Y-shaped elbow were obtained. The interaction between fluid and particles is also discussed. These findings suggest that the particles can be successfully transported when the pump runs at medium to high frequencies. The particles are basically moving along the pipe wall and slower than the fluid flow. Moreover, it was found that the particle motions are more complex with the increasing of conveying velocities, and it is closely related to the secondary flow of fluid. Some suggestions on the actual particle transportation can be put forward based on the research in this paper.

The Simulation Analysis of Tunnel Wind Cooling System in Shenyang Area

2013 ◽  
Vol 724-725 ◽  
pp. 1474-1477
Author(s):  
Xiao Ming Zhang ◽  
Yang Gao ◽  
Xiao Zhang
Keyword(s):  
Optimization Design ◽  
Simulation Analysis ◽  
Cooling System ◽  
System Optimization ◽  
Simulation Software ◽  
Equivalent Diameter ◽  
Tunnel Length ◽  
Surrounding Areas ◽  
Entrance Velocity ◽  
Tunnel Entrance

Applied FLUENT simulation software to research the influence of tunnel length, tunnel entrance velocity, tunnel equivalent diameter and tunnel buried depth four important factors on the tunnel wind cooling system in Shenyang area. The results show that, with the increase of tunnel length and tunnel buried depth and with the decrease of tunnel entrance velocity and tunnel equivalent diameter, the outdoor air which passed into the tunnel cooling amplitude increases. For the tunnel wind cooling system optimization design in Shenyang area and the surrounding areas, the advices are that tunnel buried depth should not be more than 6m and tunnel entrance velocity should not be more than 5m/s.

Research in Multidisciplinary Collaborative Optimization Base on Symmetric Fuzzy Satisfaction

2012 ◽  
Vol 616-618 ◽  
pp. 2175-2181
Author(s):  
Nan Li ◽  
Bao Wei Song
Keyword(s):  
Optimization Algorithm ◽  
Optimization Design ◽  
System Optimization ◽  
Collaborative Optimization ◽  
System Level ◽  
Academic Level ◽  
Multi Level ◽  
The Impact

Multidisciplinary collaborative optimization (CO) is a multi-level optimization algorithm, which include system-level and academic level. Because these are many complications in Engineering, it will exist the fuzzy in Discipline-level optimization devices. If the impact of discipline-level ambiguity was ignored, it will lead to some big errors in the system optimization. In order to solve this problem, this paper introduced the optimal fuzzy satisfaction into multidisciplinary collaborative optimization design, and made it as optimal targets of sub-discipline optimization devices. Then a method of multidisciplinary collaborative optimization base on Fuzzy Satisfaction was get., which can solve the fuzzy problem in multidisciplinary collaborative optimization. Meanwhile this paper used this method in multidisciplinary collaborative optimization of torpedo, and compared the results that was get by this method with the results which was get by the method that did not base on the fuzzy satisfaction, finally get the conclusion that the method is fit to Multidisciplinary collaborative optimization of torpedo.

Performance Optimization Two-Node Support Structure of Free Beam Vibration Gyro

2013 ◽  
Vol 645 ◽  
pp. 476-481 ◽  
Author(s):  
Yu Liu ◽  
Shen Liu ◽  
Wen Ji Xiong ◽  
Hong Ming Zeng
Keyword(s):  
Performance Optimization ◽  
Optimization Design ◽  
Model Simulation ◽  
System Optimization ◽  
Design Parameters ◽  
Driving Frequency ◽  
Support Structure ◽  
Beam Vibration ◽  
Shock Resistance ◽  
Free Beam

Establishing the system model of free beam vibration gyro under the influence of the Support structure, deriving and analyzing its vibration performance, comparison between model simulation through ANSYS software and relative theoretical calculation indicates that the relative error is less than 0.25%. Researches on the relations among system sensitivity, bandwidth, shock resistance and anti-interference ability of its model and sizes of Support structure contribute to principles of system optimization design and a set of design parameters: free beam (50mm×4.1mm×4.12mm), cylindrical Support structure(radius0.25mm×2.46mm), the performance of model is as: system driving frequency (8589.8HZ), bandwidth (39.4HZ), shock resistance (411.02g) and anti-interference frequency (above2381.3HZ).

Internet of Things System Optimization Design of Logistics Based on Improved LEACH Algorithm

2014 ◽  
Vol 687-691 ◽  
pp. 4004-4008
Author(s):  
Xing Hua Lu
Keyword(s):  
Internet Of Things ◽  
Radio Frequency Identification ◽  
Optimization Design ◽  
Simulation Analysis ◽  
Routing Algorithm ◽  
System Optimization ◽  
Automatic Identification ◽  
Information Transmission Problem ◽  
Logistics System ◽  
Frequency Identification

In the logistics system, the Internet of things information transmission problem is researched. The ZigBee, 3G technologies are fused in the radio frequency identification (RFID), a set of logistics networking platform is designed based on 3G-ZigBee, with the functions such as multipoint automatic identification, real-time positioning, wireless network and RFID. The logistics system is designed, the routing algorithm of logistics system is analyzed, the improved LEACH algorithm is proposed, the NS component is used for the simulation analysis. Through the simulation results, the best balance point between energy consumption and network density is obtained, the parameters of the logistics system are optimized. Finally, software design idea and workflow are presented, the purpose of the remote control is achieved.

Numerical Simulation Research of Optimization Design of Supporting Half-Coal Roadway in Deep Stope Working Face

2014 ◽  
Vol 945-949 ◽  
pp. 1169-1174
Author(s):  
Xian Tao Zeng ◽  
Ning Wang ◽  
Cong Jiang ◽  
Yun Yi Zhang ◽  
Chang Hai He
Keyword(s):  
Numerical Simulation ◽  
Optimization Design ◽  
Mining Area ◽  
Support Design ◽  
Simulation Research ◽  
Actual Measurement ◽  
Design Scheme ◽  
Coal Roadway ◽  
Working Face ◽  
Ground Stress

In this paper, design of roadway with stope working face Yeqing 8459 had been optimized combined with geological characteristics of the working face based on the actual measurement of ground stress and mechanical properties of coal rock of Yangquhe mine in Feng Feng mining area. Analyzing eight kinds of roadway support design scheme through numerical simulation and evaluating the supporting effect of each supporting design scheme, designating the construction guidelines ultimately.

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