Models of reliability and determination of acceptable periodicity of maintenance of ageing aircraft fleet


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Abstract

Mathematical models of aircraft maintenance are discussed in the paper. The first model is that of aircraft downtime, which is a function of the number of periodically performed technical operations. The second model is that of optimal maintenance periodicity to support airworthiness in conditions of providing a given level of aircraft reliability. The third model is an optimization model of aircraft maintenance costs and providing maximum profit in market economy conditions. Using the theory of differential equations as well as the theories of reliability and renewal formulae of calculating optimal allotted aircraft downtime during periodic technical operations aimed at supporting the airworthiness as well as the formulae of optimal maintenance periodicity, optimal number of maintenance operations and getting maximum profits from flight operations have been found. The proposed models are investigated with a view to specifying acceptable maintenance periodicity with regard for the cost-benefit ratio of aircraft maintenance and the possibility of using them to optimize the maintenance of the ageing fleet of civil aviation. The calculations made show the necessity of decreasing maintenance periodicity in order to optimize the servicing and efficient use of the aircraft ageing fleet.

About the authors

V. N. Pisarenko

Samara State Aerospace University

Author for correspondence.
Email: eat@ssau.ru

Candidate of Science (Engineering)

Associate Professor, Department of Aircraft Maintenance

Russian Federation

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