This paper proposes the use of vibroacoustic signal parameters to estimate the fuel consumption o... more This paper proposes the use of vibroacoustic signal parameters to estimate the fuel consumption of a miniature GTM-400 engine. The method for testing engine vibrations is presented, followed by an analysis of the results obtained. Two vibration point measures were selected to build a fuel consumption model. The models obtained were verified, after which those that best describe the real fuel consumption of the engine were selected. The paper proves that the vibration signal, in addition to its applications in jet engine diagnostics, can be used to determine engine performance, which can contribute to reducing the complexity of construction and increasing the economics of engine operation.
The paper presents the effects of the application of an experimental impulse test as a method of ... more The paper presents the effects of the application of an experimental impulse test as a method of diagnosis of the technical condition of an SO-3 engine turbine blade fitted in a TS-11 Iskra aircraft. The aim of the test was to investigate the frequency characteristics of the blades and discuss differences between the frequency spectrum of the investigated component before and after its damage. The acoustic response measurements were performed to the signal generated by an impact hammer on the fully functional and intentionally damaged blades. The recorded signals were converted from the domain of time to the domain of frequency using the Fast Fourier Transform (FFT). The results of the FFT were the Frequency Response Functions (FRF) of the sound of the blades, based on which the statistical analysis of the resonance frequencies was carried out. The influence of the mechanical damage of the blade on the shape and characteristics of the frequency spectrum was confirmed, which substant...
W artykule zaprezentowano przebieg badań oraz analizę dotyczącą możliwości wykorzystania ciśnieni... more W artykule zaprezentowano przebieg badań oraz analizę dotyczącą możliwości wykorzystania ciśnienia akustycznego jako parametru diagnostycznego w ocenie stanu technicznego elementów wykonanych z materiałów kompozytowych. Przeprowadzono eksperyment w postaci testu impulsowego z wykorzystaniem młotka modalnego jako wzbudnika odpowiedzi wibroakustycznej układu. Wykazano, że duże wewnętrzne ubytki w strukturze powodują zmiany charakterystyki funkcji odpowiedzi częstotliwościowej (Frequency Response Function, FRF) w paśmie poniżej 8 kHz. W wyniku przeprowadzonej analizy udowodniono, że ciśnienie akustyczne może być skutecznie wykorzystywane w diagnozie elementów wykonanych z materiałów kompozytowych.
The paper presents the method of assessment of the technical condition of the leading edge of the... more The paper presents the method of assessment of the technical condition of the leading edge of the horizontal stabilizer of an F-16 Block C aircraft made from composite materials. The described method was an experimental measurement of the acoustic pressures generated by the technically operational element and the element with the distorted structural continuity and then a comparison of these pressures in the curves of time and frequency in order to assess how the damage impacts the parameters of the acoustic wave. The test was performed in a dual-channel system, the pressure was induced through impacts on the investigated element with an impact hammer and then, based on the measured induction parameters and the generated acoustic wave, the function of frequency response was calculated, based on which the authors assessed how the structural damage influenced the curve characteristics of the acoustic pressure in the domain of frequency. The described method may be used as an efficient...
W artykule zaprezentowano problematykę interpretacji niestacjonarnych wibroakustycznych sygnałów ... more W artykule zaprezentowano problematykę interpretacji niestacjonarnych wibroakustycznych sygnałów diagnostycznych. Wyjaśniono przyczyny niepełnej przydatności tradycyjnej analizy wyłącznie w dziedzinie czasu lub częstotliwości dla takich przypadków. Jako proponowane rozwiązanie przedstawiono wykorzystanie metod czasowo-częstotliwościowych. Dokonano przeglądu literatury w aspekcie metod obecnie wykorzystywanych lub nad którymi prowadzone są badania. Wymieniono zarówno zastosowania starsze jak krótkoczasowa transformata Fouriera oraz bardziej złożone i współczesne jak transformata Hilberta-Huanga. Dokonano również oceny dalszych kierunków rozwoju z uwzględnieniem kombinacji metod oraz wykorzystania sztucznych sieci neuronowych oceniając te ostatnie jako dające największy potencjał w aspekcie ewolucji metod przetwarzania sygnałów. The article presents the issues of interpretation of non-stationary vibroacoustic diagnostic signals. The reasons of the incomplete usefulness of the traditio...
The article presents the issues of collisions between wild animals and approaching trains. The re... more The article presents the issues of collisions between wild animals and approaching trains. The reasons for the presence of animals on the tracks are explained and the potential threats to the environment and the safety of railway traffic are described. In order to reduce the chance of an accident involving animals, the various solutions are used: infrastructure (making animals difficult to enter the tracks) and stimulus (warning against the approaching train) and supporting methods that may increase the effectiveness of other measures. The analysis of the results of research carried out in various ecosystems around the world allowed to assess the effectiveness of the most popular methods of protecting fauna against the collision with a vehicle and the innovative solutions, taking into account the psychology of animals. Their use will allow to reach a compromise between the development of transport networks, traffic safety and reduction of the impact on the natural environment.
The article presents the issues of interpretation of non-stationary vibroacoustic diagnostic sign... more The article presents the issues of interpretation of non-stationary vibroacoustic diagnostic signals. The reasons of the incomplete usefulness of the traditional analysis solely in the field of time or frequency for such cases are explained. The use of time-frequency methods is presented as the proposed solution. The literature was reviewed in aspect of the methods currently used or on which the research is carried out. Older applications, such as the short-time Fourier transform and more complex and contemporary applications such as the Hilbert-Huang transform, are mentioned. Further development directions were also assessed, taking into account the combination of methods and the use of artificial neural networks, assessing the latter as giving the greatest potential in aspect of the evolution of signal processing methods.
This paper proposes the use of vibroacoustic signal parameters to estimate the fuel consumption o... more This paper proposes the use of vibroacoustic signal parameters to estimate the fuel consumption of a miniature GTM-400 engine. The method for testing engine vibrations is presented, followed by an analysis of the results obtained. Two vibration point measures were selected to build a fuel consumption model. The models obtained were verified, after which those that best describe the real fuel consumption of the engine were selected. The paper proves that the vibration signal, in addition to its applications in jet engine diagnostics, can be used to determine engine performance, which can contribute to reducing the complexity of construction and increasing the economics of engine operation.
The paper presents the effects of the application of an experimental impulse test as a method of ... more The paper presents the effects of the application of an experimental impulse test as a method of diagnosis of the technical condition of an SO-3 engine turbine blade fitted in a TS-11 Iskra aircraft. The aim of the test was to investigate the frequency characteristics of the blades and discuss differences between the frequency spectrum of the investigated component before and after its damage. The acoustic response measurements were performed to the signal generated by an impact hammer on the fully functional and intentionally damaged blades. The recorded signals were converted from the domain of time to the domain of frequency using the Fast Fourier Transform (FFT). The results of the FFT were the Frequency Response Functions (FRF) of the sound of the blades, based on which the statistical analysis of the resonance frequencies was carried out. The influence of the mechanical damage of the blade on the shape and characteristics of the frequency spectrum was confirmed, which substant...
W artykule zaprezentowano przebieg badań oraz analizę dotyczącą możliwości wykorzystania ciśnieni... more W artykule zaprezentowano przebieg badań oraz analizę dotyczącą możliwości wykorzystania ciśnienia akustycznego jako parametru diagnostycznego w ocenie stanu technicznego elementów wykonanych z materiałów kompozytowych. Przeprowadzono eksperyment w postaci testu impulsowego z wykorzystaniem młotka modalnego jako wzbudnika odpowiedzi wibroakustycznej układu. Wykazano, że duże wewnętrzne ubytki w strukturze powodują zmiany charakterystyki funkcji odpowiedzi częstotliwościowej (Frequency Response Function, FRF) w paśmie poniżej 8 kHz. W wyniku przeprowadzonej analizy udowodniono, że ciśnienie akustyczne może być skutecznie wykorzystywane w diagnozie elementów wykonanych z materiałów kompozytowych.
The paper presents the method of assessment of the technical condition of the leading edge of the... more The paper presents the method of assessment of the technical condition of the leading edge of the horizontal stabilizer of an F-16 Block C aircraft made from composite materials. The described method was an experimental measurement of the acoustic pressures generated by the technically operational element and the element with the distorted structural continuity and then a comparison of these pressures in the curves of time and frequency in order to assess how the damage impacts the parameters of the acoustic wave. The test was performed in a dual-channel system, the pressure was induced through impacts on the investigated element with an impact hammer and then, based on the measured induction parameters and the generated acoustic wave, the function of frequency response was calculated, based on which the authors assessed how the structural damage influenced the curve characteristics of the acoustic pressure in the domain of frequency. The described method may be used as an efficient...
W artykule zaprezentowano problematykę interpretacji niestacjonarnych wibroakustycznych sygnałów ... more W artykule zaprezentowano problematykę interpretacji niestacjonarnych wibroakustycznych sygnałów diagnostycznych. Wyjaśniono przyczyny niepełnej przydatności tradycyjnej analizy wyłącznie w dziedzinie czasu lub częstotliwości dla takich przypadków. Jako proponowane rozwiązanie przedstawiono wykorzystanie metod czasowo-częstotliwościowych. Dokonano przeglądu literatury w aspekcie metod obecnie wykorzystywanych lub nad którymi prowadzone są badania. Wymieniono zarówno zastosowania starsze jak krótkoczasowa transformata Fouriera oraz bardziej złożone i współczesne jak transformata Hilberta-Huanga. Dokonano również oceny dalszych kierunków rozwoju z uwzględnieniem kombinacji metod oraz wykorzystania sztucznych sieci neuronowych oceniając te ostatnie jako dające największy potencjał w aspekcie ewolucji metod przetwarzania sygnałów. The article presents the issues of interpretation of non-stationary vibroacoustic diagnostic signals. The reasons of the incomplete usefulness of the traditio...
The article presents the issues of collisions between wild animals and approaching trains. The re... more The article presents the issues of collisions between wild animals and approaching trains. The reasons for the presence of animals on the tracks are explained and the potential threats to the environment and the safety of railway traffic are described. In order to reduce the chance of an accident involving animals, the various solutions are used: infrastructure (making animals difficult to enter the tracks) and stimulus (warning against the approaching train) and supporting methods that may increase the effectiveness of other measures. The analysis of the results of research carried out in various ecosystems around the world allowed to assess the effectiveness of the most popular methods of protecting fauna against the collision with a vehicle and the innovative solutions, taking into account the psychology of animals. Their use will allow to reach a compromise between the development of transport networks, traffic safety and reduction of the impact on the natural environment.
The article presents the issues of interpretation of non-stationary vibroacoustic diagnostic sign... more The article presents the issues of interpretation of non-stationary vibroacoustic diagnostic signals. The reasons of the incomplete usefulness of the traditional analysis solely in the field of time or frequency for such cases are explained. The use of time-frequency methods is presented as the proposed solution. The literature was reviewed in aspect of the methods currently used or on which the research is carried out. Older applications, such as the short-time Fourier transform and more complex and contemporary applications such as the Hilbert-Huang transform, are mentioned. Further development directions were also assessed, taking into account the combination of methods and the use of artificial neural networks, assessing the latter as giving the greatest potential in aspect of the evolution of signal processing methods.
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