The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Wind power emerges as a sustainable energy resource to meet the increasing electricity needs in the next 20–30 years. Power volatility and maintenance costs are the key challenges in harvesting this type of renewable energy. The levelized cost of energy (LCOE) allows the utility and investors to compare the costs of various generation technologies of unequal lifetimes and capacities. In this study...
Power transformer is an essential and integral part of any power system. Failure of power transformer affects the working of entire system. Since failure probability is smaller as compared to success, it is easier to carry out the failure analysis for estimating the success probability. However, past failure information results in short term failure probability which does not provide reliable information...
Actual equipment experiments are adopted to measure the load spectrum of torsion shaft. Virtual prototyping supplement the load spectrum that cannot be measured by actual experiments. The comparison and analysis between actual vehicle experiment data and virtual test results of virtual prototype verify their complementarities, which provide full and accurate load spectrums for the key components....
Focused on the CCD composite dielectrics (Si3N4/SiO2), the method of the thermal-mechanical coupling simulation was studied by three different ANSYS models including the whole model, the 1/4 model and the 2-D model in this paper. The thermal stress and deformation were calculated, and the reasonableness of the simulation method was validated, and the differences of these three models simulation results...
The article shows an analysis of the reliability of a compression-ignition engine used in a medium duty truck. The criterion for the reliability assessment was the decrease in combustion chamber tightness. The analysis was based on the results of compression pressure tests and leak-down tests conducted during a long-term operation of 5 trucks. Experimental survival functions and then continuous reliability...
Aiming at the current disadvantages in the maintenance for armored vehicle command control and communication system, this paper introduces the connotation, structure, function, technical attributes and technical elements of PHM. And it proposes that adopting PHM technology in modifying current maintenance support mode is an effective way. The PHM system for armored vehicle command control and communication...
The concept that Mission Based Maintenance Decision-making for Materiel is put forward in this paper. Keeping dependability and operational readiness after mission of material is set as goal, which includes dependability centred maintenance decision-making and operational readiness after mission centred maintenance decision-making for material. The process of mission based maintenance decision-making...
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...
The use of Prognostics and Health Management (PHM) technologies has recently received an increased amount of interest from many industries. For deployment of a PHM system successfully, A key step is prognosis certification. This calls for a set of performance metrics that not only evaluate key aspects of predicting into the future but also integrate notions from practical aspects such as reliability,...
A simulation model for joint optimization of GM and spare part inventory control under infinite horizon is presented through analyzing the characteristic of spare part demand of a system under group maintenance (GM) policy. In this model, maintenance activities of GM and spare supply are simulated using Monte Carlo method, by which costs of repair, spare inventory, and loss of system downtime induced...
This paper develops a METRIC-like model to optimize inventory allocation of repairable spares in a three-echelon supply system. Supply availability is selected as the optimizing object of the model, and the total ordering cost of repairable spares is taken as the constraint condition. The optimal allocation of repairable spares is reached by the marginal analysis algorithm. Then the established model...
Comprehensive efficiency of key production facility of equipment determines the equipment support capabilities. In order to evaluate comprehensive efficiency of key production facility of equipment, on the basis of the feasibility study on rough set theory, this article establishes the evaluation index system, and take advantage of rough set theory to equipment critical production equipment efficiency,...
This paper analyzes the importance of conducting Cloud Computing Security Risk Assessment and the main factors affecting the cloud computing security. Furthermore, we establish an assessment indicator system and put forward basic methods of risk evaluation.
Quality, Reliability, Risk, Maintenance, and Safety are key concerns in industries including aviation, nuclear, and petrochemicals. Industries spend millions of dollars to address these concerns every year. Yet accidents such as the Fukushima nuclear power plant crisis 2011, the 2010 Gulf of Mexico Oil Spill, and the 2003 Northeast Blackout still occurred. Today, more than ever, Quality, Reliability,...
Multi-State System (MSS) is mathematical model of investigated object in reliability analysis. MSS allows present the investigated object in more detail than traditional Binary-State System. The importance analysis allows MSS reliability estimation depending on the system structure and its components states. Importance measures quantify the criticality of a particular component. They have been widely...
Through integrated analysis to the weapon materiel support elements of information flow, material flow, personnel flow and capital flow, this paper formed the civil-military integrated weapon materiel support system based on network and information. Civil-military integrated weapon materiel support operation mechanism is established through the aspects of management operation, support mobilization,...
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...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.