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With the application of a variety of high-tech, life cycle cost of aviation equipment increased substantially. For the life cycle cost of aviation equipment, the costs of using phase account for more than 50% of total costs. Therefore, the development of aviation industry call for a method to evaluate and predict the use phase affordability of aviation equipment. This paper defines the definition...
In order to establish the fault information platform that across industrial department and operation department, as well as to support improvement of civil aircraft's quality and operator's maintenance capability, based on the research of civil aircraft's fault during the operation phase, including its scope, classification and data collection mechanism, the database system and technical framework...
In this contribution we present selected mathematical — statistical methods which are used to analyse oil field data from heavy off-road military vehicles. We apply selected regression functions for description of the oil additives degradation in time. This helps for creating the picture about the system — vehicle engine in our case — in service operation behaviour. We investigate the oil field data...
This paper introduces and discusses an evaluation method of new data sources for reliability purposes. Through the continuously increasing amount of electronic control units (ECU) in capital goods, usage data may become available to improve reliability practices and maintenance processes. Such ECU-data sources may be captured and correlated in numerous ways and thus result in confusingly large matrices,...
Contraposing the problem of choosing an optimum maintenance mode for armored equipment important function components, RCM theories and methods are used to evaluate the fault criticality of the important function components and confirm the estimating indexes for the maintenance modes and their weight scales, while AHP method is applied to establishing the hiberarchy of the important function component...
Warranty logistics deals with various issues relating to the servicing of warranty. Proper management of warranty logistics is needed not only to reduce the warranty servicing cost but also to avoid customer dissatisfaction since it has a negative impact on sales and revenue. Controls should be instituted to minimize the total cost of logistics rather than minimizing each component of the total cost...
The purpose of this paper is to broaden the application of Total Quality Management principles on maintenance issues for modern jet fighters as an attempt to further predict, improve and confirm reliability enhancement on critical aircraft systems, sub-systems or components. The proposed methodology is focused on the identification of under-performing maintenance cycles by instituting a reliability...
In order to solve the problems in traditional maintenance modes of offshore mechanical system, such as high decision error probability and lagging-behind of maintenance, the condition assessment and maintenance decision model based on fuzzy synthetic evaluation and reliability-centered maintenance (RCM) was studied. Data processing method for different type of test data was introduced into the evaluation...
The relationship between failure rate and technical condition parameters of equipment was established through the Weibull proportional hazard model (WPHM). The dynamic decision-making model of the test intervals for condition based maintenance was formulated with failure risk as restriction. The validity of the model was verified using oil spectral analysis data of an engine.
C-130 aircraft is one of the most reliable military cargo aircraft12. Its reliability makes it more lucrative for military users all around the world. It forms the backbone for tactical and transportation operations. To keep the transport aircraft fly worthy, aviation industry follows a stringent scheduled inspection program. Amongst the various scheduled programs the most comprehensive and costly...
Aerospace systems that fail in service are often repaired or refurbished and returned to service. Repair/refurbishment may return the system to the equivalent of new condition, to some state less than new condition, or perhaps even to a better than new condition. Respectively, repair/refurbishment may have no effect on future reliability, degrade future reliability, or improve it. Depending on which...
Rolls-Royce maintains a strong commitment to providing the highest quality gas turbine power system products in the marketplace today. However, given the global pressures to achieve a high level of quality at a low predictable cost of ownership under the new TotalCare®, MissionCare® and CorporateCare® maintenance agreements, Rolls-Royce utilizes reliability improvement programs early in a products...
The efficient development of a highly reliable system, such as a new crew launch vehicle, cannot afford to ignore the lessons of history. A number of interesting studies of launch vehicle failures provide very valuable, albeit qualitative “lessons learned” on measures that a risk-informed program should take. If schedule and funds were unlimited, a very intensive and exhaustive test program would...
Games must be emergent, constantly surprising players by the possibilities they offer. However, emergence creates unpredictability, preventing developers from verifying that their games won't lead to undesirable states. Worse still, even when a bug is found, finding out how it occurred can be a significant challenge. The authors present Mayet, a system for monitoring software at runtime, and use it...
Rapid and reliable fault detection is critical for the safe and economic operation of complex industrial systems like aircraft and locomotives. A metric for quantifying the performance of fault detection systems is important for selecting and optimizing such systems. Traditional two-class classifier metrics such as accuracy or ROC curves are inappropriate for time series data. This paper introduces...
In order to study the field reliability of horizontal machining center (HMC), field reliability data for 14 HMC in an engine plant of large automobile manufacturing company in China over ten month is collected. Based on this data set, some simple plots method such as CP (the cumulative plot), MCF(mean cumulative function), RR(recurrence rate) and MCCF(mean cumulative cost function) are used to analyze...
The cumulative failure number of a repairable item increases with age and usage and represents the operational reliability of the item. In this paper, we use the cumulative failure number as a condition variable to represent the health level of an item, and use a general path model to represent the degradation process of items population. For a given time, the cumulative failure number is modeled...
The purpose of this paper is to describe an approach to reliability life prediction, applicable to the aero-engine fleet, operation under dynamic conditions. The fleet performance reliability model based on Weibull distribution is established through measuring and recording the extent of deviation and degradation from a normal operating condition of aero engine fleet. The average life and performance...
This paper aims to propose a practical approach to solving a maintenance optimization problem with uncertain system utilizations. This problem arises when we want to determine the optimal replacement time for turbine wheels, a safety-critical part in aircraft engines, by considering both the utilization uncertainties and the fact that a fleet of engines have been operating in the field for several...
With the development of industry, maintenance has become an important factor that influences survival and development of a corporation. It is an effective way for a power plant to achieve management modernization and enhance market competition by making condition based maintenance. There are numerous pieces of equipment in a power plant, but the maintenance requirement is different for respective...
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