Maintenance intervention is necessary for the equipment, such as aircraft structures and systems, to maintain their operational performance status during their lifetime. Generally maintenance costs make a significant contribution to overall operating costs. Accordingly, developing an optimal maintenance strategy to minimize maintenance costs and total lifetime operating cost (TLOC) is a critical task. This article proposes a methodology for the optimization of a reliability-centred maintenance strategy based on maintenance-free operating period (MFOP) philosophy by considering the TLOC. The method can be used to evaluate the TLOC of alternative maintenance strategies and determine the optimal maintenance interval while meeting the proposed reliability requirements. The method is also suitable for evaluating and optimizing the MFOP-based reliability design of the products. An example based on line replaceable unit replacement strategy is introduced to illustrate the proposed maintenance strategy optimization approach. And a sensitivity analysis on the TLOC index for each of the two reliability requirement parameters is also performed.
There exists many shortcomings in automotive collision avoidance system, signal interference is very serious, which led to false frequently, this is an important reason why the perfect vehicle collision avoidance system is not consummate and widely popular. We study and propose a new solution of highway automotive collision avoidance, by the control of time the precise synchronization, interaction between the vehicle lane, speed, time, and other information, which solve the problem of signal interference greatly. Thus, his new solution provides a split-new thinking and research direction for highway automotive collision avoidance.
In order to improve the overall equipment effectiveness, a new method for maintenance scheduling in manufacturing systems using the philosophies of TPM and MFOP is presented in this paper,considering both the production process and maintenance operations of manufacturing equipment. An LCC analysis is also conducted for evaluating and searching for the optimal maintenance schedule.
There is a growing need for improving manufacturing equipments availability to achieve high levels of productivity. As a key complement to CBM and RCM, PHM is becoming a key enabler for achieving cost effective ultra-reliability and availability in tomorrow’s manufacturing equipments at an affordable cost. Based on traditional maintenance strategies, key issues pertaining to PHM application to manufacturing equipments, including health monitoring, diagnostics and prognostics, are discussed in this paper. As an example, a method for dynamic MFOP based maintenance strategy optimization using PHM and RUL estimation is presented.
The research & development of intelligentialized and automated Advanced-Surface Movement Guide and Control System (A-SMGCS) is a new trend for guaranteeing the security and high efficiency of surface traffic control in the airport. Aimed at the guidance module in A-SMGCS, this paper studied the algorithm which was used for intelligently creating aircraft guided route on the ground. Using Visual C as the development platform, it introduced the design thought and the procedure of the program for realizing this algorithm. Then it has run the program and achieved the sequence of coordinated points of guided route. Comparing with the planning guided route, it analyzed the graphical results of the program. The simulation proves that the original guided route in the plan could be accurately created by this program. It also shows that this algorithm could provide some thoughts for development of A-SMGCS.
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