基于PHM的備件配置問題研究
[Abstract]:The prediction and health management of complex system (PHM) is one of the most important research hotspots in the current reliability field. Its main idea is to realize the transition of the system guarantee from the state monitoring to the state management, and to actively pay attention to the fault and the degradation risk of the system. So as to carry out the health management of the system. The problem of the configuration of the spare parts based on the PHM technology is based on this, which can reduce the number of maintenance reasonably and effectively, reduce the use and guarantee the cost, and realize the affordability of the economy. Therefore, this paper has very important theoretical and practical significance. This paper focuses on three aspects of the configuration of the spare parts: the optimal layout and the reliability model of the sensor system, which can obtain the data information of the complex system operation and provide the basis for the establishment of the spare parts configuration model; On the basis of the two kinds of repairable systems of Markov and semi-Markov, the model of spare parts configuration is set up, which is the core content of the paper, and the evaluation model of the configuration of the spare parts is constructed. It is an important part of the evaluation of the system maintenance and guarantee ability. All these studies have good originality and provide the necessary foundation for the better application of PHM in complex systems. The research work of this thesis mainly includes the following aspects: First, select the appropriate sensor class based on the environment, performance parameters (such as vibration, displacement, speed, temperature, sound, flow, etc.) in which the components are to be studied and other information With multiple sensors for data fusion, a stable and effective data letter can be obtained Interest rate. There are many factors that affect the sensor's demand. The multi-objective programming can be established for different levels (complex system level, such as system and sub-system) and different types of sensors, and the optimized layout of the sensor can be studied. in that case of the optimization of the objective function and the optimization of the configuration In order to achieve the best effect of the sensor system, the redundant structure of the multi-sensor system is also established and the reliability model is established. secondly, acquiring monitoring data of various levels of the system by a sensor, then processing and analyzing the acquired data, On the basis of this, the optimal configuration of spare parts is established for the non-repairable system The model can be used to describe the operation process of the system, and the spare parts configuration model of the non-repairable system is established and the spare parts are given. demand ....................................... a system for constructing a system or a system with a state gradient and a state aggregation feature of an important component, and a system for meeting the PHM cost-effect ratio condition, PHM system. The failure of the repairable system is the result of the continuous development of the component and the accumulation of the system damage. Therefore, it is assumed that the system has two failure modes, safety failure and dangerous failure, and the ion channel theory is used to construct the model and the preparation is given. the model is further expanded into three state sets, a working state set, a fault state set and an intermediate state set, The process is described, the formula of the configuration of the spare parts and other relevant parts are given. The fourth, on the basis of PHM technology, on the basis of PHM technology, based on the spare parts demand of the spare parts configuration model built on the basis of PHM technology, the evaluation model of the spare parts configuration is established to provide the theoretical basis for the maintenance and guarantee decision-making, so as to improve the system guarantee. The success probability of the task is determined and the spare part demand for the spare part configuration model is determined to be The paper assumes that, in the specified period, when the component fails or is damaged, the evaluation model of the existing spare parts configuration is respectively established through the updating process and the queuing theory, and the life distribution of the component is obtained as the index. repairable system composed of normal, Weibull and gamma distribution The research results of this paper have an excellent application prospect and can promote the development of reliability, so as to improve the availability of the complex system and reduce the total life cycle cost of the complex system, and the results of the research can be widely used in the management section. The research work can also expand our country's reliability in other aspects of study and engineering
【學位授予單位】:北京理工大學
【學位級別】:博士
【學位授予年份】:2014
【分類號】:TH186
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