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In many complex electromechanical systems, fault propagation between nodes always leads system-level BIT false alarms. Therefore, this paper aims at reducing system-level BIT false alarms based on the research of small-world properties of fault propagation in large-scale systems. Firstly, find out community centers in the system which has small-world network properties, and then divide the system...
In order to carry out quantitative evaluation of technology readiness of weapon equipment in the engineering development phase, a detailed method for evaluating technology readiness level is proposed. Based on the feature that technology engineering performance parameter is objective and quantifiable and Key Engineering Performance Parameter(KEPP) being taken as evaluation index for technology readiness...
This research takes the safety inventory and the uncertainty of supply and demand in inventory distribution network into consideration, establish the reliability model and supply-demand distribution model, and demonstrates the feasibility and practicability of the model which is used to solve problems of reliability of supply-demand distribution in spare parts inventory distribution network.
In order to solve the division and coordination problems between the upper and lower organizations in organization coordination network of major scientific and technological project (MSTP) based on contract links, we apply the game theory integrated and establish appropriate model for the sequential action game analysis, equilibrium analysis coordination, cooperation, distribution of profits and subsidies...
Under the assumption that time to failure and time to repair of unit are exponentially distributed, this paper presents a general procedure for conducting an inherent availability test with fixed sample size of two-unit same redundant system. Above all, two design principles for general availability test procedure of redundant system are presented. One is that ensuring stated levels of producer's...
Fault tree analysis (FTA) is a popular methodology for system reliability analysis. The occurrence probability of the basic event is accurate in traditional fault tree (FT). Owe to the lack of the reliability data, especially in early design stage; a large amount of uncertainties may be included in FTA. In this study, the Dempster-Shafer (D-S) evidence theory is employed to quantify the uncertainty...
In this paper, we presented a simulation based model to analysis the reliability of phased-mission system (PMS) with repairable components. Many researches on the repairable PMS supposed that failed components would be repairable only when the system is in a good state. It is different here that failed components can be repaired no matter what state is the system in. The mission successes if and only...
The maintenance is recognized deeply and deeply along with flourish development of equipment maintenance theory and technology, people attach more and more importance to the new management mode and means of equipment maintenance—Health Management theory. The research of health management is important, and analysing the formation and development of health management is not only the precondition of...
This paper describes the design and implementation of the mobile power station monitoring instrumentation under Windows CE 6.0 operating system with embedded microprocessor S3C6410. For improving the communication capabilities of traditional mobile power station monitoring instrumentation, a new Ethernet interface using the DM9000E core chip is designed. After transplanting the chip's driver, the...
As the end point of power delivery, a distribution system is directly connected with the consumers. It has complex structures and various operation modes which make the reliability even more important. However, the traditional FMEA cannot be applied to the complex distribution system which contains ring networks. Taking the capacity constraint of distribution system into consideration, this paper...
This paper considers defending a single object with imperfect false targets and disinformation actions. Existing papers have assumed that the false targets are either perfect or with a constant detection probability. In practice, intelligent attacker may allocate part of its budget into detecting the false targets. Analogously, the defender can allocate part of its budget into disinformation actions...
Aiming at the deficiencies of the present methods, this paper proposes an improved method based on the comprehensive application of D-S theory and fuzzy method. We divide Interpretative Structural Modeling (ISM) system which is established according to the characteristics of key factors and related indexes of radiosonde in early evaluation course into two major parts. I.e. ‘many-to-one’ structure...
Fault tree analysis (FTA) is a top-down approach for failure analysis, starting with a potential undesirable event called a TOP event, and then determining all the ways it can happen. FTA is the most commonly used technique for causal analysis in risk and reliability studies. Mask stage an important part of lithography. In this paper, Fault Tree of the mask stage is built with “Mask stage doesn't...
Shaving teeth is a common accurate method for cutting gears. The meshing transmission of shaver processing gear is such as a pair of crisscross shaft. Because shaving cutter needs grinding many times on the condition, so that it becomes blunt. How to check and calculate the mesh parameter and these parameters whether meet the choose conditions are important tasks. In addition, these processes are...
Aiming at the difficulty of evaluating the support capacity of intermediate-level, a new evaluation method based on simulation is given. Firstly, the concept model of maintenance support is established. Secondly, a simulation idea based on event scheduling method is offered. Thirdly, the evaluation index and model on the basis of database of simulation process is discussed. The simulation evaluation...
As the execute body of combat and training mission, support object system provides input information for model of equipment support system in equipment support simulation. There is important meaning to research of modeling method of support object system. The focus of support object system modeling is how to produce maintenance task and determine relations of support object system model and mission...
A method of patterns recognition was presented based on fuzzy rough sets. Dynamic clustering algorithm and method of analysis of variance is introduced to fuzzify the continuous condition attribute, and fuzzy membership functions is derived, which avoided losing information caused by discretization in rough set theory. F test is introduced to judge the valid analysis of clustering, which has overcome...
It introduces statistical sampling inspection (SSI) in overhaul quality inspection of a certain military equipment. The discrimination programs and switching rules of SSI are studied. Then, the practical implementation procedure of SSI is established systemically, and the evaluation method is also discussed. Aiming at a practical instance of overhaul quality inspection, sampling inspection plans are...
The increasing complexity of engineering systems has sparked rising interests in multidisciplinary design optimization (MDO). However, the main challenges in MDO are its computational expense and complexity structure. Therefore, to address these challenges, this paper focuses on a new MDO method, interaction prediction optimization approach, which is a design architecture applied in the multidisciplinary...
This paper gives an analysis of the reliability test data of 6 types of armament with fuzzy comprehensive evaluation, the degrees of reliability of the 6 tested armaments are obtained through fuzzy comprehensive evaluation and cluster analysis, and the basis for model selection in aspect of reliability is given. The calculation result shows that it is practicable to adopt fuzzy mathematics in research...
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