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.
In this paper, a dynamic reliability based design optimization problem of the lifting gear transmission system is formulated and solved. We focus on two issues in the design process, one is the excitations of the lifting gear transmission system, the random speed input, time variant meshing stiffness, dynamic loads are analyzed. The other is two kinds of reliability constraints, time-invariant reliability...
Dempster-Shafer (D-S) evidence theory is one of the most prevalent methods of uncertainty reason in reliability engineering and information fusion. However, the conflict factor cannot fully describe the degree of conflict between two pieces of evidence in classical D-S evidence theory. In this paper, the existing methods in terms of characterizing the dissimilarity degree of evidence are reviewed...
Multi-layer lithography machine is one of the most important equipment in integrated circuit production and it has attracted considerable interests on the dynamic reliability and precision reliability. This paper focuses on the dynamic precision reliability of six DOF micro-displacement mechanism in reticle stage, and establishes a dynamic error model based on homogeneous coordinate array theory....
It is crucial to evaluate reliability of the electrohydraulic servo valve (EHSV) which has been widely used in many fields. This paper firstly presents the physical structure and functional principle of EHSV. The Failure Mode, Effects and Criticality Analysis (FMECA) is conducted afterwards. Lastly, a method that can quantitatively analyze reliability and failure rate of EHSV suffering common cause...
Generally, multidisciplinary design optimization (MDO) has a good performance when dealing with the coupled relationship among disciplines. However, the preference of designers could not be reflected in MDO. Therefore, some effective approaches, which can reflect preference of designers, should be proposed to handle the optimization problem with increased complexity. In this paper, an effective optimal...
Besides the Wiener and Gamma processes, the inverse Gaussian (IG) process is recently proposed as an attractive yet flexible family for degradation modeling. Since degradation test depends heavily on the degradation model chosen for a product's degradation process, we discuss the optimal design for degradation tests specifically based on the IG process. Other than an optimal design with pre-estimated...
Dual-stage lithography machine is still in the prototype development stage and it is meaningful to study its reliability. Since this kind of machine is very stable, there are not enough failure data and adequate available samples for us during the analysis process. Considering these factors, this paper will take advantage of similar equipment method and neural network to predict the reliability of...
Failure rate is a commonly used reliability measure for engineering systems. Accurately describing failure rate of a system often plays a crucial role in maintainability analysis and modeling. The failure dependency among components will accelerate the failure process of entire system. This paper proposes a new failure rate model with considering the failure interaction between components. Examples...
Reliability evaluation can help designers to judge quality levels of products and improve their design. This paper evaluates reliability with considering customer satisfaction index (CSI). CSI is widely used in the field of economics to evaluate economic performance and feasibility. Using CSI and fuzzy synthetic assessment (FSA), we can get a satisfaction level about lithography machine. Five main...
A zero failure always exists in modern electronic products and its reliability based on zero-failure data has become a problem that needs to be solved to improve the reliability of the whole equipment. This paper solved the problem of parameter selection in the E-Bayesian and hierarchical Bayesian estimation methods and then applied these two Bayesian methods to the zero-failure data of an electric...
With the development of science and technology, the engineering equipment and products are becoming more and more complicated. So, the system reliability has attracted great attention of Scholars and engineers. Because the system reliability is mainly subjected to Weibull distribution, it is important to improve the Weibull model. A new method is proposed in this paper, which can improve calculation...
Classical reliability theory always uses probability theory to quantify uncertainty information and it will meet a lot of difficulties when data is sparse or quantification of uncertainty is based on subjective information. As a generalization of probability theory, imprecise probability theory can express subjective information on a behavioral interpretation via the buying and selling price for a...
In engineering design, to achieve high reliability and safety in multidisciplinary systems, Reliability Based Multidisciplinary Design Optimization (RBMDO) has received increasing attention. In this paper, Mean-value First Order Saddlepoint Approximation (MVFOSA) is introduced and combined with the collaborative optimization (CO) method to deal with the reliability analysis under aleatory uncertainty...
In this paper, a new reliability analysis method is developed for turbopump device with the zero-failure life testing data. To assess the reliability of turbopump device with zero-failure data, firstly, equivalent failure theory is used to convert the zero-failure data into equivalent failure data, and then E-Bayesian estimation combing data fusion method are introduced to calculate its reliability...
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...
Reliability Based Design Optimization (RBDO) aims to optimize performance function under reliability constraints, which is not considered in the deterministic design optimization. During the past decades, with the advent of powerful computers, lots of literatures focused on developing the methods of RBDO for the accuracy and efficiency. However, with the application of RBDO in various cases, it is...
Possibilistic reliability theory is the study of reliability based on the principles of possibility theory. In this paper, the possibilistic reliability function of multi-state system is redefined and analyzed utilizing the possibility distribution of system lifetime. In order to express the internal relationship between system state and residual lifetime, state corresponding most possible residual...
Generally, multidisciplinary design optimization (MDO) is a deterministic design method, which does not takes uncertainty into account. However, uncertainty cannot be ignored since it has a significant influence on the design results of the engineering system. In this paper, in order to reduce the effect of uncertainty on system performance, First-Order Second-Moment based collaborative optimization...
Reliability is one of the critical attributes for long life and high performance satellite. To deal with the limitation on satellite reliability analysis confronted in the past decades, a series of papers has been published recently by Saleh et al. In these papers, thousands of Earth-orbiting satellites successfully launched between 1990 and 2008 have been analyzed. This paper extends the statistical...
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,...
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.