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Fault forecasting is very important to establish accurate maintenance support plan, reduce maintenance support cost, improve operational readiness rate and mission dependability rate, even avoid the huge loss for missile equipment; To resolve the problem of new-style missile equipment fault forecasting difficultly, which is induced by the complexity of system compose, fuzziness of configuration connection...
A method of patterns recognition was presented based on fuzzy rough sets. Dynamic clustering algorithm and method of analysis of variance is introduced to fuzzify the continuous condition attribute, and fuzzy membership functions is derived, which avoided losing information caused by discretization in rough set theory. F test is introduced to judge the valid analysis of clustering, which has overcome...
Information fusion arises in a surprising number of fault diagnosis applications. In this paper, common faults are designed in the experiment according to the gear pump vibration mechanism. Fault signal is collected from vibration sensors of different positions, and wavelet packet energy percentage and RMS are extracted as features of the signal. RBF neural network is adopted to fuse thiese features...
Preventive maintenance (PM) plays a very important role in production process. In this paper, the optimization PM planning in finite time horizon for a single machine with minimal repair at failures is discussed. Not only two conflicting objectives of maintenance cost and maintenance time but also two constraints of the reliability and availability of the machine are simultaneously considered in the...
The maintenance optimisation of a series-parallel system is a practical and imperative research topic. However, existing research on the maintenance of a series-parallel system largely ignores the economic dependence among components, which can increase the maintenance cost. In addition, most current research assumes that the components in a system only have two states, while condition monitoring...
This paper proposes the GSPN method to model auto product warranty service process to analyze its performance. On that basis, the GSPN model is developed and converted to Markov Chain for the GSPN is isomorphic with Markov Chain. With Markov Chain and corresponding mathematics method we obtain the main performance indexes of the process. The bottlenecks of the process are identified to provide the...
According to the dynamic evaluation of performance reliability of the key components of Propellant Filling System, a model simulating the filling procedure is built with AMESim. According to FMEA for the system, especially the deterioration mechanism of pneumatic ball valves, the degradation states of pneumatic ball valve are simulated, and a number of evaluation models of the degradation degree based...
According to the background of attackers' accomplishment of breaking through and attacking enemy's rear ground target, penetration effectiveness model of attackers is constructed. After theoretical analyzing the affection of using airborne electronic jamming measures and anti-radar missile to the penetration effectiveness and some simulation examples, the rationality of the model is verified. The...
A new k-out-of-n redundancy system is studied where all components have the same characteristics and experience dependent failure processes due to simultaneous exposure to degradation and shock loads. The k-out-of-n system reliability model is developed and preventive maintenance policy is applied. Some research has been done on a single component or simple system, or systems with independent failure...
Food safety has been a hot topic of global focus. In this paper, we concentrate on food safety from the perspective of supply chain. To do this, we develop a mechanism combining government, industries and society together, and we show that such a structure provides an available approach to improving food safety in China.
Turbo fan engine mathematical model is a highly complex nonlinear system. Solving engine mathematical model with traditional iteration methods turns out to be difficult as these methods are very sensitive to initial values. Therefore particle swarm optimization is used to solve the model. An improved particle swarm optimization algorithm is produced. The mechanism of immune is introduced in the new...
Starting from the demand for antagonizing anti-radiation weapons of fire control radar, the principle of intermittent target tracking of fire control radar network is introduced, and the fire control radar network simulation system based on high level architecture is designed, the functional structure of the simulation federation and the simulation process of federal members is analyzed. In order...
It introduces statistical sampling inspection (SSI) in overhaul quality inspection of a certain military equipment. The discrimination programs and switching rules of SSI are studied. Then, the practical implementation procedure of SSI is established systemically, and the evaluation method is also discussed. Aiming at a practical instance of overhaul quality inspection, sampling inspection plans are...
Based on the principles of reliability and maintainability, a type of gun fire control system was taken as research object. The method combining the system composition character with the system reliability index allocation model was used to realize the technique of system reliability. The system failure rate and fault distribution principle were combined with maintainability realization principle...
The paper elaborates the meaning of researches on civil-military integration of equipment maintenance support, and makes analysis on the risk factors existing in the civil-military integration of equipment maintenance support. This paper also puts forwards countermeasures and suggestions on how to prevent risks of civil-military integration of equipment maintenance support, and does a beneficial exploration...
Joint Capabilities Integration and Development System is the system for U.S. Army to define potential operational capability gaps or technical opportunities, i.e., the system for demonstration of operational capability requirements. With view to regulate the operational capability requirements demonstration and enhance the standard and quality of demonstration, U.S. Army has issued 6 editions of Joint...
Autonomic Logistics (AL) is the inevitable result of the high-tech applications in the field of equipment support, the inevitable trend of development of equipment support in the 21st century. Its military and economic benefits will inevitably change the support mode far-reaching impact. This paper theoretically analyzes the equipment support strategy development process, as well as the underlying...
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