Airworthiness of aircraft. Part I. A stochastic model

Narasimha, R. ; Ananthasayanam, M. R. (1978) Airworthiness of aircraft. Part I. A stochastic model Sadhana (Academy Proceedings in Engineering Sciences), 1 (1). pp. 93-104. ISSN 0256-2499

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It is argued that a stochastic approach to airworthiness analysis is necessary because of the inherent random variations in aircraft performance. It is then shown that the history of any performance variable in fleet service is best regarded as a 'stochastic corrective process', characterised by slow deterioration punctuated by rapid improvements at overhauls. Considering specifically the engine-out take-off climb performance of an aircraft, a model is proposed by taking into account gradient changes due to the deterioration of airframe, engine and propeller (if present), the frequency and effectiveness of overhauls, and the occurrence of deviations in the gradient achieved on any flight from the true capability of the aircraft. In analysing the effect of overhauls a distinction is made between maintenance by rectification and by replacement. In the model proposed a total of 14 parameters govern the probability distribution of the achieved gradient in fleet history, and consequently also the incident rate during take-off climb.

Item Type:Article
Source:Copyright of this article belongs to Indian Academy of Sciences.
Keywords:Airworthiness; Flight Safety; Stochastic Modelling; Take-off Climb
ID Code:67587
Deposited On:31 Oct 2011 05:48
Last Modified:18 May 2016 14:37

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