Polish Maritime Research最新文献_第6页

A Generative Approach to Hull Design for a Small Watercraft 小型船舶船体设计的生成方法

IF 2 3区工程技术

Polish Maritime Research Pub Date : 2023-03-01 DOI: 10.2478/pomr-2023-0001

A. Karczewski, J. Kozák

引用次数: 0

Deep Learning-Based Fault Diagnosis for Marine Centrifugal Fan 基于深度学习的船用离心通风机故障诊断

IF 2 3区工程技术

Polish Maritime Research Pub Date : 2023-03-01 DOI: 10.2478/pomr-2023-0011

Congyue Li, Yihuai Hu, Jiawei Jiang, Guo Yan

{"title":"Deep Learning-Based Fault Diagnosis for Marine Centrifugal Fan","authors":"Congyue Li, Yihuai Hu, Jiawei Jiang, Guo Yan","doi":"10.2478/pomr-2023-0011","DOIUrl":"https://doi.org/10.2478/pomr-2023-0011","url":null,"abstract":"Abstract Marine centrifugal fans usually work in harsh environments. Their vibration signals are non-linear. The traditional fault diagnosis methods of fans require much calculation and have low operating efficiency. Only shallow fault features can be extracted. As a result, the diagnosis accuracy is not high. It is difficult to realize the end-to-end fault diagnosis. Combining the Complete Ensemble Empirical Mode Decomposition with Adaptive Noise (CEEMDAN) and lightweight neural network, a fault classification method is proposed. First, the CEEMDAN can decompose the vibration signal into several intrinsic modal functions (IMF). Then, the original signals can be transformed into 2-D images through pseudo-colour coding of the IMFs. Finally, they are fed into the lightweight neural network for fault diagnosis. By embedding a convolutional block attention module (CBAM), the ability of the network to extract critical feature information is improved. The results show that the proposed method can adaptively extract the fault characteristics of a marine centrifugal fan. While the model is lightweight, the overall diagnostic accuracy can reach 99.3%. As exploratory basic research, this method can provide a reference for intelligent fault diagnosis systems on ships.","PeriodicalId":49681,"journal":{"name":"Polish Maritime Research","volume":"30 1","pages":"112 - 120"},"PeriodicalIF":2.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46140159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Performance Comparison of ToA and TDOA Based Tracking In Underwater Multipath Environments Using Bernoulli Filter 水下多径环境下基于ToA和TDOA的伯努利滤波器跟踪性能比较

IF 2 3区工程技术

Polish Maritime Research Pub Date : 2023-03-01 DOI: 10.2478/pomr-2023-0014

A. Gunes

引用次数: 1

Numerical Investigation of Length to Beam Ratio Effects on Ship Resistance Using Ranse Method 用量程法数值研究长梁比对船舶阻力的影响

IF 2 3区工程技术

Polish Maritime Research Pub Date : 2023-03-01 DOI: 10.2478/pomr-2023-0002

T. Le, Nguyen Duy Anh, T. Tu, Nguyen Thi Ngoc Hoa, Vu Minh Ngoc

引用次数: 0

Adptive Heading Control of Underactuated Unmanned Surface Vehicle Based on Improved Backpropagation Neural Network 基于改进反向传播神经网络的欠驱动无人水面车辆自适应航向控制

IF 2 3区工程技术

Polish Maritime Research Pub Date : 2023-03-01 DOI: 10.2478/pomr-2023-0006

Zaopeng Dong, Jiakang Li, W. Liu, Haisheng Zhang, Shijie Qi, Zheng Zhang

{"title":"Adptive Heading Control of Underactuated Unmanned Surface Vehicle Based on Improved Backpropagation Neural Network","authors":"Zaopeng Dong, Jiakang Li, W. Liu, Haisheng Zhang, Shijie Qi, Zheng Zhang","doi":"10.2478/pomr-2023-0006","DOIUrl":"https://doi.org/10.2478/pomr-2023-0006","url":null,"abstract":"Abstract Aiming at the challenges to the accurate and stable heading control of underactuated unmanned surface vehicles arising from the nonlinear interference caused by the overlay and the interaction of multi interference, and also the uncertainties of model parameters, a heading control algorithm for an underactuated unmanned surface vehicle based on an improved backpropagation neural network is proposed. Based on applying optimization theory to realize that the underactuated unmanned surface vehicle tracks the desired yaw angle and maintains it, the improved momentum of weight is combined with an improved tracking differentiator to improve the robustness of the system and the dynamic property of the control. A hyperbolic tangent function is used to establish the nonlinear mappings an approximate method is adopted to summarize the general mathematical expressions, and the gradient descent method is applied to ensure the convergence. The simulation results show that the proposed algorithm has the advantages of strong robustness, strong anti-interference and high control accuracy. Compared with two commonly used heading control algorithms, the accuracy of the heading control in the complex environment of the proposed algorithm is improved by more than 50%.","PeriodicalId":49681,"journal":{"name":"Polish Maritime Research","volume":"30 1","pages":"54 - 64"},"PeriodicalIF":2.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47574889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Three-Dimensional Underwater Path Planning Based on Modified Potential Field Algorithm in Time-Varying Current 基于时变流中改进势场算法的三维水下路径规划

IF 2 3区工程技术

Polish Maritime Research Pub Date : 2023-03-01 DOI: 10.2478/pomr-2023-0004

Shasha Wang, Guilin Feng, Dan Wang, Yulong Tuo

引用次数: 0

Evaluation of the Use of M2M-Type NB-IoT and LTE Technologies for Maritime Communication Systems m2m型NB-IoT和LTE技术在海事通信系统中的应用评估

IF 2 3区工程技术

Polish Maritime Research Pub Date : 2023-03-01 DOI: 10.2478/pomr-2023-0013

S. Gajewski, Agnieszka Czapiewska, M. Gajewska

{"title":"Evaluation of the Use of M2M-Type NB-IoT and LTE Technologies for Maritime Communication Systems","authors":"S. Gajewski, Agnieszka Czapiewska, M. Gajewska","doi":"10.2478/pomr-2023-0013","DOIUrl":"https://doi.org/10.2478/pomr-2023-0013","url":null,"abstract":"Abstract The development of IoT (the Internet of Things) wireless transmission opens a new era in communication systems. In the next years, the development and implementation of IoT systems will be very dynamic. It can be seen that the solutions of LTE – NB-IoT (Long Term Evolution – Narrowband IoT) transmission devices are implemented in a wide range of terrestrial solutions, e.g. smart grids. This paper aims to analyse the possibility of the use of NB-IoT technology for maritime communication applications and partially, for some maritime safety solutions, based on signal coverage analysis at sea. An interesting approach is the comparison of the results of NB-IoT coverage to the classic cellular LTE-based communication systems. Proposed solutions are based on the practical implementation of a designed specialised data concentrator with implemented gateway and radio modems, for both NB-IoT technology as well as LTE. In the paper, analyses of radio link budget and propagation loss models for sea environment are presented. The coverage analysis is based on real measurements of the efficiency of transmissions using wireless modems implemented in the developed data concentrator.","PeriodicalId":49681,"journal":{"name":"Polish Maritime Research","volume":"30 1","pages":"126 - 134"},"PeriodicalIF":2.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45797266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on MDO of Ship Propulsion Shafting Dynamics Considering the Coupling Effect of a Propeller-Shafting-Hull System 考虑螺旋桨-船体系统耦合效应的船舶推进轴系动力学MDO研究

IF 2 3区工程技术

Polish Maritime Research Pub Date : 2023-03-01 DOI: 10.2478/pomr-2023-0009

Jinlin Liu, Zheng Gu, Shuyong Liu

{"title":"Research on MDO of Ship Propulsion Shafting Dynamics Considering the Coupling Effect of a Propeller-Shafting-Hull System","authors":"Jinlin Liu, Zheng Gu, Shuyong Liu","doi":"10.2478/pomr-2023-0009","DOIUrl":"https://doi.org/10.2478/pomr-2023-0009","url":null,"abstract":"Abstract Dynamic designs for ship propulsion shafting can be categorised as complex multi-disciplinary coupling systems. The traditional single disciplinary optimisation design method has become a bottleneck, restricting the further improvement of shafting design. In this paper, taking a complex propulsion shafting as the object, a dynamic analysis model of the propeller-shafting-hull system was established. In order to analyse the coupling effect of propeller hydrodynamics on shafting dynamics, the propeller’s hydrodynamic force in the wake flow field was calculated as the input for shafting alignment and vibration analysis. On this basis, the discipline decomposition and analysis of the subdisciplines in design of shafting dynamics were carried out. The coupling relationships between design variables in the subdisciplines were studied and the Multi-disciplinary Design Optimisation (MDO) framework of shafting dynamics was established. Finally, taking the hollowness of the shaft segments and the vertical displacement of bearings as design variables, combined with the optimal algorithm, the MDO of shafting dynamics, considering the coupling effect of the propeller-shafting-hull system, was realised. The results presented in this paper can provide a beneficial reference for improving the design quality of ship shafting.","PeriodicalId":49681,"journal":{"name":"Polish Maritime Research","volume":"30 1","pages":"86 - 97"},"PeriodicalIF":2.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45095876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Dilatant-Fluid Torsional Vibration Damper for a Four-Stroke Diesel Engine Crankshaft 四冲程柴油机曲轴的膨胀流体扭振减振器

IF 2 3区工程技术

Polish Maritime Research Pub Date : 2023-03-01 DOI: 10.2478/pomr-2023-0012

S. Kozytskyi, S.V. Kiriian

{"title":"Dilatant-Fluid Torsional Vibration Damper for a Four-Stroke Diesel Engine Crankshaft","authors":"S. Kozytskyi, S.V. Kiriian","doi":"10.2478/pomr-2023-0012","DOIUrl":"https://doi.org/10.2478/pomr-2023-0012","url":null,"abstract":"Abstract This paper presents a study of a viscous torsional vibration damper for a crankshaft of a four-stroke diesel engine. The reliable operation of a widely used silicone-type viscous damper depends on the ability of the silicone oil to absorb the energy of torsional vibrations. The non-Newtonian shear flow of the silicone oil interlayer, characterised by a reduction in the shear-rate-dependent viscosity and a moment of the drag forces, negatively affects damping characteristics. A torsional vibration damper, filled with a shear-thickening fluid, was considered and a rheological approach, based on viscosity growth with the shear rate increase, was applied. For such a damper, larger velocity gradients correspond to the higher values of a viscous force, which decreases torsional vibration. The parameter of damper effectiveness (defined by the fluid flow index, values of the damper gaps, torsional vibration amplitude and frequency) was implemented. It has been established that the efficiency of the torsional vibration damper filled with a dilatant fluid does not depend on the damper dimensions and gaps and significantly increases when a shear-thickening fluid is used instead of silicone oil or a Newtonian fluid. At higher values of the flow index, when the non-Newtonian flow becomes distinct, torsional vibrations are damped more effectively. Critical vibration amplitudes at high-velocity gradients, in turn, increase the damping effect as the moment of the drag forces and flow index are power-law related.","PeriodicalId":49681,"journal":{"name":"Polish Maritime Research","volume":"30 1","pages":"121 - 125"},"PeriodicalIF":2.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46416430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Consistent Design of PID Controllers for an Autopilot 自动驾驶仪PID控制器的一致性设计

IF 2 3区工程技术

Polish Maritime Research Pub Date : 2023-03-01 DOI: 10.2478/pomr-2023-0008

Z. Świder, L. Trybus, Andrzej Stec

{"title":"Consistent Design of PID Controllers for an Autopilot","authors":"Z. Świder, L. Trybus, Andrzej Stec","doi":"10.2478/pomr-2023-0008","DOIUrl":"https://doi.org/10.2478/pomr-2023-0008","url":null,"abstract":"Abstract A consistent approach to the development of tuning rules for course-keeping and path-tracking PID controllers for a ship autopilot are presented. The consistency comes from the observation that for each of the controllers the controlled plant can be modelled by an integrator with inertia. In the case of the course controller, it is the well-known Nomoto model. The PID controller may be implemented in series or parallel form, the consequence of which is a 2nd or 3rd order of the system, specified by a double or triple closed-loop time constant. The new tuning rules may be an alternative to the standard ones given in [1,2]. It is shown that, whereas the reference responses for the standard and new rules are almost the same, the new rules provide better suppression of disturbances such as wind, waves or current. The parallel controller is particularly advantageous. The path-tracking PID controller can provide better tracking accuracy than the conventional PI. Simulated path-tracking trajectories generated by a cascade control system are presented. The novelty of this research is in the theory, specifically in the development of new tuning rules for the two PID autopilot controllers that improve disturbance suppression.","PeriodicalId":49681,"journal":{"name":"Polish Maritime Research","volume":"30 1","pages":"78 - 85"},"PeriodicalIF":2.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44676799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1