Virtual Maintenance Concepts and Methods

2010 ◽  
Vol 26-28 ◽  
pp. 714-719 ◽  
Author(s):  
Dong Zhou ◽  
Jian Ming Shi ◽  
Jie Geng ◽  
Chuan Lv
Keyword(s):  
Petri Net ◽  
Simulation Method ◽  
New Technique ◽  
Model And Simulation ◽  
A New Technique ◽  
Key Techniques ◽  
Virtual Maintenance ◽  
Maintenance Model

The paper first demonstrates some relevant concepts with virtual maintenance, and further discusses the concepts and connotations of virtual maintenance. As the key techniques, virtual maintenance model and simulation method are studied in the paper. Virtual maintenance model (VMM) is present, and the model is based on Petri Net and can describe the relations of maintenance resources. In addition, virtual maintenance simulation rules are built in the paper. Finally, a case study of the LRU repair of an aircraft is conducted, and the result confirms the validation and feasibility of all the studies, which can become a new technique means for maintainability engineering.

Virtual Maintenance Process Modeling and Simulation

2010 ◽  
Vol 44-47 ◽  
pp. 527-531 ◽  
Author(s):  
Dong Zhou ◽  
Mei Hui Wang ◽  
Lin Huo ◽  
Chuan Lv
Keyword(s):  
Modeling And Simulation ◽  
Control Method ◽  
Model And Simulation ◽  
Scheduling Method ◽  
A New Technique ◽  
Conflict Strategies ◽  
Virtual Maintenance ◽  
Maintenance Model ◽  
Maintenance Process

Virtual maintenance technique brings new mode for system maintainability design and analysis, however, the theory of virtual maintenance is not fully studied and researches are deficiency in the key field of virtual maintenance modeling and simulation. So virtual maintenance model and simulation control method are studied in the paper. Virtual maintenance model is based on Petri Net and can describe the relations of maintenance resources, and the model structure, formal definition, maintenance object, resource state and model operation are given. In addition, virtual maintenance simulation rules and simulation scheduling method are built in the paper. Simulation scheduling objective, flow and conflict features of maintenance process simulation are analyzed, and conflict strategies are addressed subsequently. Finally, a case study of the LRU repair of an aircraft is conducted, and the result confirms the validation and feasibility of all the studies, which can become a new technique means for maintainability engineering.

Maintenance Simulation and Maintainability Design Based on Virtual Reality

2011 ◽  
Vol 467-469 ◽  
pp. 457-461 ◽  
Author(s):  
Dong Zhou ◽  
Mei Hui Wang ◽  
Zhi Qi Guo ◽  
Chuan Lv
Keyword(s):  
Control Mechanism ◽  
Control Method ◽  
State Action ◽  
Model And Simulation ◽  
A New Technique ◽  
Design Defects ◽  
Virtual Maintenance ◽  
Maintenance Model ◽  
Task Simulation

Virtual maintenance technology based on the concept of concurrent engineering can change the traditional maintainability "serial" design approach which cause the cycle is long, costly and difficult to change the design defects and shortcomings, and also meet the timing and economics of product development needs. However, the theory of virtual maintenance is not fully studied and researches are deficiency in the field of virtual maintenance modeling and simulation. So this article discusses the concept and connotation of virtual maintenance, and virtual maintenance model and simulation control method are studied in the paper. The model of maintenance task simulation called MTN (Maintenance Task Net) is present, and the factors including State, Action and Condition that are defined in MTN are demonstrated. In addition, the paper constructs the fire rules and the control mechanism of virtual maintenance simulation which is driven by MTN. Finally, a case study of the LRU repair of an aircraft is conducted, and the result confirms the validation and feasibility of all the studies, which can become a new technique means for maintainability design and analysis.

scholarly journals A Novel Rules Based Approach for Estimating Software Birthmark

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Shah Nazir ◽  
Sara Shahzad ◽  
Sher Afzal Khan ◽  
Norma Binti Alias ◽  
Sajid Anwar
Keyword(s):  
Fuzzy Logic ◽  
Soft Computing ◽  
Fuzzy Rule ◽  
New Technique ◽  
License Agreement ◽  
Rule Based ◽  
Software Birthmark ◽  
A New Technique

Software birthmark is a unique quality of software to detect software theft. Comparing birthmarks of software can tell us whether a program or software is a copy of another. Software theft and piracy are rapidly increasing problems of copying, stealing, and misusing the software without proper permission, as mentioned in the desired license agreement. The estimation of birthmark can play a key role in understanding the effectiveness of a birthmark. In this paper, a new technique is presented to evaluate and estimate software birthmark based on the two most sought-after properties of birthmarks, that is, credibility and resilience. For this purpose, the concept of soft computing such as probabilistic and fuzzy computing has been taken into account and fuzzy logic is used to estimate properties of birthmark. The proposed fuzzy rule based technique is validated through a case study and the results show that the technique is successful in assessing the specified properties of the birthmark, its resilience and credibility. This, in turn, shows how much effort will be required to detect the originality of the software based on its birthmark.

METHODS OF THE QUALITATIVE THEORY FOR THE HINDMARSH–ROSE MODEL: A CASE STUDY – A TUTORIAL

2008 ◽  
Vol 18 (08) ◽  
pp. 2141-2168 ◽  
Author(s):  
ANDREY SHILNIKOV ◽  
MARINA KOLOMIETS
Keyword(s):  
Periodic Orbits ◽  
Slow Motion ◽  
Qualitative Theory ◽  
New Technique ◽  
Modified Model ◽  
Averaging Technique ◽  
Return Mapping ◽  
Homoclinic Bifurcations ◽  
A New Technique

Homoclinic bifurcations of both equilibria and periodic orbits are argued to be critical for understanding the dynamics of the Hindmarsh–Rose model in particular, as well as of some square-wave bursting models of neurons of the Hodgkin–Huxley type. They explain very well various transitions between the tonic spiking and bursting oscillations in the model. We present the approach that allows for constructing Poincaré return mapping via the averaging technique. We show that a modified model can exhibit the blue sky bifurcation, as well as, a bistability of the coexisting tonic spiking and bursting activities. A new technique for localizing a slow motion manifold and periodic orbits on it is also presented.

A new technique for monitoring the detailed behaviour of terrestrial animals: A case study with the domestic cat

2005 ◽  
Vol 94 (1-2) ◽  
pp. 117-131 ◽  
Author(s):  
Shinichi Watanabe ◽  
Masako Izawa ◽  
Akiko Kato ◽  
Yan Ropert-Coudert ◽  
Yasuhiko Naito
Keyword(s):  
Domestic Cat ◽  
New Technique ◽  
A New Technique

Study on Information System with Condition-Based Maintenance Models for a Continuously Degrading System

2013 ◽  
Vol 703 ◽  
pp. 227-230 ◽  
Author(s):  
Ao Lin Huang ◽  
Qing Min Li ◽  
Tie Bing Li
Keyword(s):  
Information System ◽  
Preventive Maintenance ◽  
Process Models ◽  
Condition Based Maintenance ◽  
Optimal Solutions ◽  
Model And Simulation ◽  
Maintenance Time ◽  
Degrading System ◽  
Maintenance Model

This paper considers on-condition maintenance of a continuously degrading information system, in which the inter-maintenance time and the maintenance time depend on the condition of the system at which maintenance is carried out. The durations of preventive maintenance activities are supposed to be exponentially distributed. Assuming deterioration of the system follows a gamma process, models are established to maximize the system average availability when the effectiveness of the preventive maintenance activity becomes weaker and weaker. Optimal solutions on the condition of the system at which maintenance should be performed and the number of times of maintenance action to be carried out are obtained based on Monte-Carlo simulation. A case study is given to show the procedure of the maintenance model and simulation.

A New Technique to Investigate Cell Layers of the Capsule Wall Using Frullania (Hepaticae) as a Case Study

1999 ◽  
Vol 102 (2) ◽  
pp. 240 ◽  
Author(s):  
Matt von Konrat ◽  
John E. Braggins ◽  
Philip J. Harris
Keyword(s):  
New Technique ◽  
Capsule Wall ◽  
Cell Layers ◽  
A New Technique
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