High-Reliability Design Methods of the 1553B Bus Communication Software for Manned Spacecraft

2021 ◽  
Author(s):  
Yan Qi ◽  
Li Huachun ◽  
He Yifeng
Keyword(s):  
High Reliability ◽  
Design Methods ◽  
Reliability Design ◽  
Manned Spacecraft ◽  
Communication Software

Reliability Design and Compliance Methods of a Complete Set of 1000MW Ultra-Supercritical Thermal Generating Units

2017 ◽  
Author(s):  
Shi Jinyuan ◽  
Deng Zhicheng
Keyword(s):  
High Reliability ◽  
Rapid Development ◽  
Design Methods ◽  
Reliability Design ◽  
Availability Factor ◽  
Design Values ◽  
Complete Set ◽  
Factor Design ◽  
Design Value ◽  
Statistical Results

The reliability design and compliance methods for a complete set of 1000MW ultra-supercritical thermal generating units were presented. In twenty-first century, with the rapid development of installed capacity of 1000MW ultra-supercritical thermal generating units in China, at the end of 2015, there are eighty-three 1000MW ultra-supercritical thermal generating units which were put into operation in China, China has become the country which posses the most 1000MW ultra-supercritical thermal generating units in operation. In order to meet the high reliability requirements of 1000MW ultra-supercritical thermal generating units which have been put into operation, the reliability design methods for a complete set of 1000MW ultra-supercritical thermal generating units are needed in engineering. The calculation formula of the availability deducted planned outage hours from period hours and the reliability calculation models of 1000MW ultra-supercritical thermal generating units were proposed, simultaneously with the calculation and compliance methods for the equivalent availability factor design value of 1000MW ultra-supercritical thermal generating units. The statistical formulas of the reliability characteristic, statistical results for the unit derating factor of 1000MW ultra-supercritical thermal generating units were given, together with the calculation examples and verification examples of equivalent availability factor design value for 1000MW ultra-supercritical thermal generating units. The relative error’s range of the equivalent availability factor design values is between −0.55% to 3.37%, base on the statistical results for reliability of 123-year operation data of eighteen 1000MW ultra-supercritical thermal generating units in 8 thermal power stations. Among them, the absolute value of relative error’s range of equivalent availability factor design values for 120 unit years operation data is less than 1%. Results shows that the calculation accuracy of the equivalent availability factor EAF of 1000MW ultra-supercritical thermal generating units is high precision by using the reliability design methods are given. These reliability design methods may be using in quantitative calculation of the design value of equivalent availability factor, which therefore may serve as a reference for reliability design and improvement of 1000MW ultra-supercritical thermal generating units.

Existing Military Trainer Engine Designed to Achieve Low Maintenance Cost

1980 ◽  
Author(s):  
K. G. Kamm ◽  
J. M. Noblat ◽  
J. C. Somers
Keyword(s):  
Life Cycle Cost ◽  
High Reliability ◽  
The United States ◽  
Maintenance Cost ◽  
Modular Construction ◽  
Military Aircraft ◽  
Turbine Engine ◽  
Reliability Design ◽  
Endurance Tests ◽  
Small Bird

The LARZAC 04 turbofan engine has been designed, developed and qualified by two French gas turbine engine companies linked by a controlling group known as Groupement Turbomeca-SNECMA. The LARZAC engine is in production for the Alpha Jet, a military aircraft developed by Avions Marcel Dassault-Breguet Aviation and Dornier GmbH. Teledyne CAE has an agreement to market, service and, optionally, to manufacture the LARZAC 04 in the United States and Canada and has designated this engine the Model 490-4. This paper addresses the criteria used to design the Model 490-4 and achieve high reliability and low maintenance cost. For example: (a) modular construction and how it reduces maintenance cost, (b) high reliability design and its payoff in low maintenance costs, and (c) the planned growth of the inspection intervals to achieve minimum Life Cycle Cost. Also addressed in this paper is the rugged design of the engine as proven by cyclic component tests, large and small bird ingestion, water and hail ingestion, short cycle testing and Simulated Mission Endurance Tests.

Reliability Design of Crane Lattice Jib Based on Response Surface Method

2014 ◽  
Vol 687-691 ◽  
pp. 243-248
Author(s):  
Ge Ning Xu ◽  
Jun Liu ◽  
Ge Zhang
Keyword(s):  
Response Surface ◽  
Response Surface Method ◽  
High Reliability ◽  
Steel Structure ◽  
Reliability Design ◽  
Failure Path ◽  
Surface Method ◽  
Function Expression ◽  
The Difference ◽  
Failure Probabilities

The failure path of large complex steel structure systems for lattice jib cranes is investigated in this paper. Considering the lack of an explicit function expression in the study of reliability, a method based on a modified response surface method is proposed to quantify the reliability index and the failure probability, capitalizing on the linear-approximated iteration and the difference approach rather than the differential approach in solving nonlinear equations. The major failure path is determined through the analysis of the multiple failure probabilities. The main failure mode of lattice jib cranes is a failure in stability, not a failure in strength based on a comparison of the failure probabilities of both stability failures and strength failures. And the failure path is substantially a rearrangement of the hazardous components and the failure path of components with similar probabilities and close locations varies only in that these components break at distinct starting positions. Finally a proposal is put forward to heighten in engineer practices the security reserves of hazardous components to achieve high reliability of an overall system.

The Motion Control System of Servomotor Based on CAN Bus

2012 ◽  
Vol 163 ◽  
pp. 260-263
Author(s):  
Jing Lin Tong ◽  
Bo Li ◽  
Xiao Bo Wang
Keyword(s):  
Control System ◽  
Motion Control ◽  
High Speed ◽  
Can Bus ◽  
High Reliability ◽  
Controller Area Network ◽  
Area Network ◽  
Price Ratio ◽  
Motion Control System ◽  
Communication Software

This paper introduces the hardware and the communication software design of control system based on Controller Area Network bus. The control system can realize to control the motion of servomotor through high speed C8501F040 single chip microcomputer with Controller Area Network bus and special motion controller - LM628. This system possesses characteristics such as simple structure, high reliability and high performance/price ratio. Key words: CAN bus, LM628, Motion Control System, Communication software

Campus Network Based on VRRP Redundancy and Reliability

2013 ◽  
Vol 347-350 ◽  
pp. 2007-2011
Author(s):  
Xiao Qi Yin ◽  
Yi Zhuo Guo
Keyword(s):  
High Reliability ◽  
The Other ◽  
Campus Network ◽  
Reliability Design ◽  
Amount Of Information ◽  
Access Data

With the dramatic increase in amount of information in campus network, the security and high reliability of access data have become urgent requirements on redundancy reliability design of campus network. This paper adopts the technology of VRRP and takes advantages of double backup sets and router to process the design and configuration. As is shown in the experiment, when one device fails, the other ones can still complete relevant operations under the conditions of double backup sets. Therefore, the redundancy reliability design of campus network can be realized through the technology of VRRP double backup sets.

scholarly journals Application of Reliability Design Methods to Donghae Harbor Breakwater

2006 ◽  
Vol 48 (1) ◽  
pp. 31-57 ◽  
Author(s):  
Seung-Woo Kim ◽  
Kyung-Duck Suh
Keyword(s):  
Design Methods ◽  
Reliability Design

Reliability Analysis for the Power and Propulsion System of Stratospheric Airship

2012 ◽  
Vol 225 ◽  
pp. 511-516
Author(s):  
Jian Liu ◽  
Quan Bao Wang ◽  
Jian Chen ◽  
Deng Ping Duan ◽  
Shu Wang
Keyword(s):  
Power System ◽  
High Reliability ◽  
Propulsion System ◽  
Cell Array ◽  
Reliability Design ◽  
Reliability Models ◽  
Stratospheric Airship ◽  
Time Period ◽  
Long Time ◽  
One Year

For meeting requirements of staying in the stratosphere for a long time period more than one year and less of maintenance, the power and propulsion system of the stratospheric airship is required to have high reliability. In this regard, reliability design is a key procedure in the design phase of the power and propulsion system of stratospheric airship. This paper focuses on the quantitative analysis of the reliability for the power and propulsion system of the stratospheric airship. Firstly, the reliability of the solar cell array and the fuel cell of power system are discussed respectively. Then, different topologies of the power system are discussed and compared. The reliability of the propulsion system is also analyzed in different configurations. The reliability of the basic combination of the power and propulsion system is discussed. For improving reliability, a new type of combination for the power and propulsion system is proposed. Reliability models of proposed combination are created through simplification. The ZhiYuan-1 is used as a demonstration problem to show the capability of this reliability-improved method. The result shows that the reliability of ZhiYuan-1 power and propulsion system increases by 12.8%.

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