Vibration Diagnostics of the Naval Propulsion Systems

Kluczyk, Marcin; Grządziela, Andrzej

doi:10.5604/0860889x.1237619

Cited by 5 publications

(5 citation statements)

References 3 publications

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“…However, vibration sensor is the most desired factor because of its noninvasiveness and mobility. Considering possibilities of interference in the pump and advantages and disadvantages of mounting vibration sensors as presented in the article [32], sticking sensors with glue was performed on a test stand.…”

Section: Feature Importance Analysismentioning

confidence: 99%

Vibration Velocity Prediction with Regression and Forecasting Techniques for Axial Piston Pump

Fic,

Czornik,

Rosikowski

2023

Applied Sciences

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Measuring vibration velocity is one of the most common techniques to estimate the condition of industrial machines. At a constant operating point, as the vibration velocity value increases, the machine’s condition worsens. However, there are no precise thresholds that indicate the condition of a machine at different operating points. Also, the axial piston pump, which is the subject of the article, is a device that generates stronger vibrations by design and cannot be enclosed in general vibration norms. Due to different use cases and work regimes of axial piston pumps, the need to determine whether the device is working correctly for a broad spectra of operating points emerges. This article aims to present and compare different methods for vibration velocity prediction for axial piston pumps with use of neural networks including dense networks, variants of recurrent neural networks, and ensemble methods. The result of this research consists of models that have performance metrics that clearly indicate whether the monitored pump has malfunctioned or not across a wide variety of operating points, working conditions, and in case of reassembling. A detailed analysis of the influence of available measured variables on the performance of models is also provided. The conclusion is that the application of commercial implementation of developed models is reasonable in the context of both performance quality and costs of sensors needed to provide the necessary data.

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Section: Feature Importance Analysismentioning

confidence: 99%

Vibration Velocity Prediction with Regression and Forecasting Techniques for Axial Piston Pump

Fic,

Czornik,

Rosikowski

2023

Applied Sciences

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“…The main aim of the identification tests was to find a mathematical function describing the fatigue durability of the drive shaft τ W in terms of input (forcing) quantity values associated with an action of the rotary mechanical system in the form of work D W , heat D U , mechanical vibration generation D V , and generation of acoustic emission elastic waves D EA [1,4]. Assuming that the values of the individual forms of action are determined from measurements as extortions affecting the propeller shaft, the physical model of its fatigue process might be presented as the physical model shown in Fig.…”

Section: Identification Studiesmentioning

confidence: 99%

Energy Analysis of the Propulsion Shaft Fatigue Process in a Rotating Mechanical System Part II Identification Studies – Developing the Fatigue Durability Model of a Drive Shaft

Korczewski

Marszałkowski

2020

Polish Maritime Research

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The article presents a continuation of research carried out concerning identification of energy consequences of mechanical fatigue within a propeller shaft in a rotating mechanical system, while working under conditions of the loss of the required alignment of shaft lines. Experimental research was carried out on a physical model reflecting a full-sized real object: i.e., the propulsion system of the ship. It is proven, by means of an active experiment, that changes in propeller shaft deflection are reflected in the amount of dissipated kinetic energy of masses in rotational motion and the accumulated internal energy in its construction material. Adoption of a high-cycle fatigue syndrome, consisting of diagnostic symptoms determined from the action of the propeller shaft associated with the transformation of mechanical energy into work and heat, as well as with the generation of mechanical vibrations and elastic waves of acoustic emission, is proposed. To assess the diagnostic information quantity brought about by the defined features of propeller shaft fatigue, an experimental research program was developed and implemented, in which two statistical hypotheses are verified: the significance of the impact of the values enforcing the fatigue process, presented in the first part of the article, and the adequacy of the regression equation describing the fatigue durability of the propeller shaft in the energy aspect, constituting the second part of the article. This finally gives us the opportunity, after the appropriate translation of the model test results into full-sized real objects, to develop a methodology to diagnose marine propeller shaft fatigue in operating conditions. The third part of the article is devoted to this issue

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“…One of the most popular methods is assessing the technical condition of engines is their indication [10,11,14]. Another popular methods is assessment of the technical condition of engines based on acceleration measurements are particularly popular [2,3,6,20]. Optical studies using endoscopes to assess the surface condition of engine working spaces are also popular.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of adequacy of a model of a marine diesel engine based upon empirical research

Kniaziewicz¹,

Zacharewicz²

2020

Combustion Engines

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The article presents a mathematical model of a marine diesel engine developed for the needs of the research on the innovative method of evaluating technical condition of a marine engine. Basic assumptions of the method under development have also been included. The main focus has been directed on the evaluation of adequacy of a mathematical model of a marine diesel engine proposed in this article. In addition, measures of adequacy for the needs of the conducted research have also been presented. A comparison of the results of empirical and modeling research was presented. Finally, the article shows results from the conducted research followed by conclusions.

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Vibration Diagnostics of the Naval Propulsion Systems

Cited by 5 publications

References 3 publications

Vibration Velocity Prediction with Regression and Forecasting Techniques for Axial Piston Pump

Vibration Velocity Prediction with Regression and Forecasting Techniques for Axial Piston Pump

Energy Analysis of the Propulsion Shaft Fatigue Process in a Rotating Mechanical System Part II Identification Studies – Developing the Fatigue Durability Model of a Drive Shaft

Evaluation of adequacy of a model of a marine diesel engine based upon empirical research

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