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Fault pattern and mechanism of Software-intensive equipment are discussed and thought of application on fault diagnosis in Software-intensive equipment by HMM is presented. Based on the HMM theory, the algorithm of which is modified by multi-state reliability analysis to evaluate the state of Software-intensive equipment fault pattern. The result shows that the method presented can succeed in recognizing...
In recent years, the computer simulation technology in military field is applied more and more widely. It has been developed from the traditional single and centralized simulation to distribute interactive simulation. The composition of the modeling and simulation common technical framework is discussed. Based on six-element abstract modeling method, equipment maintenance support simulation modeling...
Cargo transport can perform many type missions, such as airlift, airdrop and airborne etc. Each type mission need corresponding cargo configuration by installing mission equipment in the cargo to meet the need of the mission. The configuration proportions of mission equipments must consider the mission capability rate, economy and utilization ratio. The paper take small scale cargo transport fleet...
This article elaborates the concept and meaning of virtual reality technology and virtual maintenance, discusses the virtual reality technology application in the process of equipment maintenance, and gives a brief introduction to virtual maintenance system, which use VC and vega software as a platform and set up by Multigen Creator and 3D MAX, quoted an cannon as an example.
The maintenance support level of armies has an important effect on their integrated combat efficiencies. How to evaluate the capability of a given maintenance support network is very important for equipment maintenance support scheduling. This paper proposes an object-oriented Petri net (OOPN) based approach for modeling and analyzing the capability of the maintenance support network. First, it presents...
Real-time reliability assessment methods make it possible to asset system reliability on-line, which promote the development of the reliability research. A new method of real-time reliability assessment based on support vector regression (SVR) and Bayes is put forward in this paper. Firstly, principles of SVR and Bayes methods are particularly introduced, and then a model of real-time reliability...
Aiming at the atrocious storage environment of missile solid rocket motor, especially the higher requirement for structural reliability, based on the modified Arrhenius and GM-BP methods, the solid rocket motor life prediction principle was proposed. Using these methods, the engine life estimate and the propulsion system store life prediction model were founded. The modified Arrhenius method suits...
This paper introduced the Flooding protocol, the Directed Diffusion protocol and the Low Energy Adaptive Clustering Hierarchy protocol, simulated the protocols under the OMNeT++ simulating platform, analyzed the advantages and shortcomings of the above three routing protocols, compared the routing protocols from the energy consumption, the time delay, pockets dropping rate. It proposed some suggestions...
It is educed that synchronously considering the accuracy and stability of prediction model is the primary reason that the linear fixed weight combination prediction model based on minimizing error sum of squares is widely applied to differently domanial prediction problems now by analyzing. On this base, the linear fixed weight combination prediction model based on prediction model validity is built,...
Equipment spare parts demand forecasting is the precondition of conducting effective spare parts supporting. Equipment spare parts demand change is the result of comprehensive factors and single model forecasting accuracy is not high. Aim to improve the precision of equipment spare parts demand forecasting, a forecasting method of equipment spare parts demand is proposed using grey neural network...
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...
Knowledge-based diagnostic approaches are usually restricted to known systems because of the nature of knowledge representation in terms of empirical symptom-failure association. Model-based diagnosis methods to the expert systems offer substantial advantages in terms of flexibility and potentials of knowledge reuse. This paper describes a modeling method and diagnosis technique for the power system...
According to the dynamic evaluation of performance reliability of the key components of Propellant Filling System, a model simulating the filling procedure is built with AMESim. According to FMEA for the system, especially the deterioration mechanism of pneumatic ball valves, the degradation states of pneumatic ball valve are simulated, and a number of evaluation models of the degradation degree based...
Lifetime is a key parameter for electronic products using, and how to obtain the lifetime by using a short-term aging data has become a challenging issue. In this paper, a new aging data analysis method will be introduced, and three groups of aging data for high power laser diodes will be as a case to expound this method. The aging test time will be greatly decreased by using this method.
In consideration of some drawbacks of stochastic reliability method in theoretical and practical aspects, as well as the existence of insufficient and vague data in actual equipments design, the possbilistic reliability models of typically general systems are constructed in this paper. Characterizing the systems(components) failure behavior by possibility measures in place of probability measures,...
Interactive Electronic Technical Manual (IETM) is the latest form of technical data. Now, the manner and efficiency of IETM generation can not meet the requirements. In order to solve the above problem, and reduce the manual workload and possible error by human, the manner of IETM generation based on Logistics support analysis record for materiel (LSAR) was proposed. Data characteristics of LSAR and...
In this paper, a dynamically-weighted software reliability combination model is proposed, aiming at improving predictive quality. The process of forming the combination model includes selection of component models and determination of weight assignment. Criteria for selecting component models include life cycle phase, trend exhibited by failure data, validity of model assumptions and predictive biases...
In reliability-centered maintenance (RCM), maintenance policies are made not only through analyzing failure mode but also considering the relationship of performance, economic and maintenance policy. RCM is becoming a preferred popular maintenance analysis method for complex system. Traditional RCM lacks of quantificational facility on importance analysis, technical state estimate and maintenance...
The modern satellite communication depends on satellite-station data links widely. The transmitting reliability of satellite-station data links is one of the most important factors for satellite navigation and nature disaster remote sensing. The satellite-station data links must be flexible enough to be established and eliminated, so it is a multi-state system. The space and atmosphere will affect...
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