Challenges in Reliability-Based Maintenance Optimization for Single and Multi-Component Systems

The maintenance tasks in present studies for the maintenance optimization of multi-component systems are mostly simplex, while the compound maintenance that integrates several kinds of maintenance types existing in practice are seldom studied. To optimize the compound maintenance intervals of multi-component systems, the group maintenance strategy was introduced in this paper, the maintenance cost structure and composition were analyzed from system point of view, and the mathematical models were established for expected maintenance cost per unit time. Finally, a numerical example was illustrated to prove the validity of the strategy and models above.

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Prognostic control-enhanced maintenance optimization for multi-component systems

Reliability Engineering & System Safety ◽

10.1016/j.ress.2017.04.011 ◽

2017 ◽

Vol 168 ◽

pp. 218-226 ◽

Cited By ~ 7

Author(s):

Gang Niu ◽

Junjie Jiang

Keyword(s):

Maintenance Optimization ◽

Component Systems

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Role of boundaries in the crystallization of amorphous films

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100105199 ◽

1988 ◽

Vol 46 ◽

pp. 626-627

Author(s):

D. A. Smith

Keyword(s):

Low Temperature ◽

Amorphous State ◽

Nucleation And Growth ◽

Amorphous Films ◽

Island Nucleation ◽

Surface Steps ◽

Transmission Electron ◽

Component Systems ◽

Temperature Deposition

The nucleation and growth processes which lead to the formation of a thin film are particularly amenable to investigation by transmission electron microscopy either in situ or subsequent to deposition. In situ studies have enabled the observation of island nucleation and growth, together with addition of atoms to surface steps. This paper is concerned with post-deposition crystallization of amorphous alloys. It will be argued that the processes occurring during low temperature deposition of one component systems are related but the evidence is mainly indirect. Amorphous films result when the deposition conditions such as low temperature or the presence of impurities (intentional or unintentional) preclude the atomic mobility necessary for crystallization. Representative examples of this behavior are CVD silicon grown below about 670°C, metalloids, such as antimony deposited at room temperature, binary alloys or compounds such as Cu-Ag or Cr O2, respectively. Elemental metals are not stable in the amorphous state.

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Automatic Tread Gaging Machine

Tire Science and Technology ◽

10.2346/1.2151011 ◽

1979 ◽

Vol 7 (1) ◽

pp. 31-39

Author(s):

G. S. Ludwig ◽

F. C. Brenner

Keyword(s):

Experimental Tests ◽

Automatic Machine ◽

Wear Rates ◽

Handling Device ◽

Straight Line ◽

Component Systems ◽

Before And After ◽

Good Repeatability ◽

The Difference ◽

Straight Lines

Abstract An automatic tread gaging machine has been developed. It consists of three component systems: (1) a laser gaging head, (2) a tire handling device, and (3) a computer that controls the movement of the tire handling machine, processes the data, and computes the least-squares straight line from which a wear rate may be estimated. Experimental tests show that the machine has good repeatability. In comparisons with measurements obtained by a hand gage, the automatic machine gives smaller average groove depths. The difference before and after a period of wear for both methods of measurement are the same. Wear rates estimated from the slopes of straight lines fitted to both sets of data are not significantly different.

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