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60. Vibroacoustic technique for the fault diagnosis in a gear transmission of a military helicopter

Author

Zieja, Mariusz, Golda, Pawel, Zokowski, Mariusz, Majewski, Pawel, Zieja, Mariusz, Golda, Pawel, Zokowski, Mariusz, and Majewski, Pawel

Abstract

This article presents the results of laboratory studies of a two-stage gear transmission regarding the process of intentionally increasing damage of its tooth. Also, this study discusses the construction of a gear transmission of a military helicopter on the basis of basic kinematic results of its vibroacoustic signals. What is important, the article describes the aim of laboratory stand, which was to authenticate the applied algorithms of technical condition evaluation of combat helicopter. Also, the process of deepening the damage to the tooth of the gear transmission was described. It was made with the use of stable ranges of rotational speed of measurements of transmission casing in three mutually perpendicular directions and have been referred to the condition without damage. In the article, diagnostic criteria are also determined for the assessment of technical conditions of military helicopter equipped with a gear transmission.

Published
2017

61. Introduction to Prediction of Operational Efficiency for a Selected Type of a Military Aircraft / Wprowadzenie Do Prognozy Skuteczności Działania Wybranego Typu Wojskowego Statku Powietrznego

Author

Zieja Mariusz, Tomaszek Henryk, and Kaleta Ryszard

Subjects
Engineering, Aeronautics, business.industry, Operational efficiency, Safety, Risk, Reliability and Quality, business, Automotive engineering
Abstract

The study reveals the general outline for a method of determining the operational efficiency of a military aircraft with respect to destruction of targets held by a potential enemy. The method consists in determination of selected probability factors that define the efficiency of an aircraft’s operation on a potential battlefield. The paper is focused on finding a formula for the mathematical expectation for the number of enemy targets that can be eliminated, where the analytical relationships is determined by means of difference equation that is subsequently transformed into the Fokker-Planck partial differential equation. The solution of that equation represents the function of probable density for the number of destroyable targets. When the function is known it can be then used to determine the efficiency factor related to the optimum (most desired) number of enemy targets that are destroyed. For these probabilities the denominator values are equal to one or the optimum values. The efficiency factor, determined in such a way, seems to be useful for determination of the operational potential demonstrated by a military aircraft.

Published
2012

78. Outline of a method for estimating the durability of components or device assemblies while maintaining the required reliability level.

Author

ZIEJA, Mariusz, WAŻNY, Mariusz, and STĘPIEŃ, Sławomir

Subjects
DURABILITY, RELIABILITY in engineering, MECHANICAL wear, IMPACT (Mechanics), PROBABILITY theory
Abstract

Copyright of Maintenance & Reliability / Eksploatacja i Niezawodność is the property of Polish Scientific & Technical Society Consumables, Polish Maintenance Society and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2018
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79. MODELOWANIE DYNAMICZNYCH WŁAŚCIWOŚCI TERMOELEKTRYCZNYCH CZUJNIKÓW POŻARU W LOTNICZYM SYSTEMIE PRZECIWPOŻAROWYM.

Author

Szelmanowski, Andrzej, Zieja, Mariusz, and Głyda, Krzysztof

Abstract

The paper presents selected results of work at the Air Force Institute of Technology (AFIT) in the concerning modeling the dynamic properties of fire detectors used in aviation fire protection systems. In order to determine the conditions of false fire signals, the simulation models of thermoelectric fire detectors have been developed. Simulation models were tested in Matlab-Simulink computational packages for various methods of heating and cooling the sensors (among others, changes in ambient air temperature of the sensor, caused by the EWU exhaust gas diffusers were simulated - these diffusers are used to distribute flue gases from helicopter engines). [ABSTRACT FROM AUTHOR]

Published
2017
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83. 2372. Vibroacoustic technique for the fault diagnosis in a gear transmission of a military helicopter.

Author

Zieja, Mariusz, Golda, Pawel, Zokowski, Mariusz, and Majewski, Pawel

Subjects
*GEARING machinery, *POWER transmission, *ACOUSTIC vibrations, *VIBRATION (Mechanics), *MILITARY helicopters, *HELICOPTER transmission devices
Abstract

This article presents the results of laboratory studies of a two-stage gear transmission regarding the process of intentionally increasing damage of its tooth. Also, this study discusses the construction of a gear transmission of a military helicopter on the basis of basic kinematic results of its vibroacoustic signals. What is important, the article describes the aim of laboratory stand, which was to authenticate the applied algorithms of technical condition evaluation of combat helicopter. Also, the process of deepening the damage to the tooth of the gear transmission was described. It was made with the use of stable ranges of rotational speed of measurements of transmission casing in three mutually perpendicular directions and have been referred to the condition without damage. In the article, diagnostic criteria are also determined for the assessment of technical conditions of military helicopter equipped with a gear transmission. [ABSTRACT FROM AUTHOR]

Published
2017
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84. Statistical Analysis of Ground-Related Incidents at Airports

Author

Tomaszewska, Justyna, Krzysiak, Paweł, Zieja, Mariusz, and Woch, Marta

Abstract

In recent years, the aviation sector has been developing dynamically. The constant increase in the number of passengers contributes to an escalation in the number of air operations. This trend is mainly due to the increased traffic not only in airspace but also within airports. The large concentration of aircraft at the largest airports makes ground-flying phases such as taxiing or take-off becoming a challenge for pilots, ground services, and air traffic controllers. An intensive operation of many objects on the airport's manoeuvring areas can lead to collisions between them. Global air traffic is growing constantly, with record numbers of air operations and passengers carried. The probability of a collision increases, which leads not only to the cancellation of the flight but also to the significant costs of the aircrafts repair. The statistical analysis allows to highlight the problems related to the issue of ground collisions at airports and can also confirm the thesis concerning the growth and density of air traffic.

Published
2018
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85. A Computer-Based System to Analyze and Assess Flight Safety of Military Aircraft

Author

AIR FORCE INST OF TECHNOLOGY WARSAW (POLAND), Kaleta, Ryszard, Zieja, Mariusz, AIR FORCE INST OF TECHNOLOGY WARSAW (POLAND), Kaleta, Ryszard, and Zieja, Mariusz

Abstract

The purpose of this paper is to present principles describing the operation of a complex system that assesses flying safety of military aircraft. The computer-based system TURAWA has been developed in the Air Force Institute of Technology and at present is being implemented in air force bases. The system allows for proper management of flying safety., See also ADB381582. RTO-MP-IST-087 Information Management - Exploitation (Gestion et exploitation des informations). Proceedings of RTO Information Systems Technology Panel (IST) Symposium held in Stockholm, Sweden on 19-20 October 2009., The original document contains color images.

Published
2009

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