Bulletin of the Polish Academy of Sciences-Technical Sciences最新文献

{"title":"148440","authors":"","doi":"10.24425/bpasts.2024.148440","DOIUrl":"https://doi.org/10.24425/bpasts.2024.148440","url":null,"abstract":"","PeriodicalId":55299,"journal":{"name":"Bulletin of the Polish Academy of Sciences-Technical Sciences","volume":"8 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136228828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"148439","authors":"","doi":"10.24425/bpasts.2023.148439","DOIUrl":"https://doi.org/10.24425/bpasts.2023.148439","url":null,"abstract":"","PeriodicalId":55299,"journal":{"name":"Bulletin of the Polish Academy of Sciences-Technical Sciences","volume":"8 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136228827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sensorless five-phase induction motor drive with third harmonic injection and inverter output filter","authors":"P. Strankowski, J. Guzinski, M. Morawiec, A. Lewicki, F. Wilczyński","doi":"10.24425/BPASTS.2020.133369","DOIUrl":"https://doi.org/10.24425/BPASTS.2020.133369","url":null,"abstract":"The paper presents a sensorless control approach for a five-phase induction motor drive with third harmonic injection and inverter output filter. In the case of the third harmonic injection being utilised in the control, the physical machine has to be divided into two virtual machines that are controlled separately and independently. The control system structure is presented in conjunction with speed and rotor flux observers that are required for a speed sensorless implementation of the drive. The last section is dedicated to experimental results of the drive system in sensorless operation, and the uninterrupted drive operation for two open-phase faults.","PeriodicalId":55299,"journal":{"name":"Bulletin of the Polish Academy of Sciences-Technical Sciences","volume":"47 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90221538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"On evaluation of influence coefficients for edge and intermediate boundary elements in 3D problems involving strong field concentrations","authors":"L. Rybarska-Rusinek","doi":"10.24425/BPAS.2019.125435","DOIUrl":"https://doi.org/10.24425/BPAS.2019.125435","url":null,"abstract":"The paper presents a tool for accurate evaluation of high field concentrations near singular lines, such as contours of cracks, notches and grains intersections, in 3D problems solved the BEM. Two types of boundary elements, accounting for singularities, are considered: (i) edge elements, which adjoin a singular line, and (ii) intermediate elements, which while not adjoining the line, are still under strong influence of the singularity. An efficient method to evaluate the influence coefficients and the field intensity factors is suggested for the both types of the elements. The method avoids time expensive numerical evaluation of singular and hypersingular integrals over the element surface by reduction to 1D integrals. The method being general, its details are explained by considering a representative examples for elasticity problems for a piecewise homogeneous medium with cracks, inclusions and pores. Numerical examples for plane elements illustrate the exposition. The method can be extended for curvilinear elements.","PeriodicalId":55299,"journal":{"name":"Bulletin of the Polish Academy of Sciences-Technical Sciences","volume":"56 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90467031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nanohardness and elasticity of cell walls of Scots pine (Pinus sylvestris L.) juvenile and mature wood","authors":"P. Mania, M. Nowicki","doi":"10.24425/bpasts.2020.134645","DOIUrl":"https://doi.org/10.24425/bpasts.2020.134645","url":null,"abstract":"","PeriodicalId":55299,"journal":{"name":"Bulletin of the Polish Academy of Sciences-Technical Sciences","volume":"16 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135544891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Active vibration control of a gyroscopic rotor using experimental modal analysis","authors":"Jens Jungblut, Christian Fischer, Stephan Rinderknecht","doi":"10.24425/bpasts.2021.138090","DOIUrl":"https://doi.org/10.24425/bpasts.2021.138090","url":null,"abstract":"A gyroscopic rotor exposed to unbalance is controlled with an active piezoelectrical bearing in this paper. A","PeriodicalId":55299,"journal":{"name":"Bulletin of the Polish Academy of Sciences-Technical Sciences","volume":"18 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135544921","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Advances in electrical power engineering","authors":"Ł. Nogal, S. Robak, J.W. Bialek","doi":"10.24425/bpasts.2020.134192","DOIUrl":"https://doi.org/10.24425/bpasts.2020.134192","url":null,"abstract":"Papers [4‒6] are related to smart grids, and are devoted to the issue of microgrids. The paper co-authored by A. Cagnano, E. De Tuglie, F. Marcone, G. Porro, and D.D. Rasolomampionona [4] presents a control strategy for real-time operation of a master-slave controlled microgrid. The proposed control strategy allows to schedule all dispatchable energy sources available into a microgrid to minimize its operational costs. Control decisions are made centrally by the system, whose operation is based on the solution of a two-stage optimization problem. Considered timescales of control problem are day-ahead and in real-time. The paper co-authored by M. Parol, P. Kapler, J. Marzecki, R. Parol, M. Połecki, and Ł. Rokicki [5] presents distributed control, combining the effects of distributed cooperative control and modified Monte Carlo optimization in the case of rural low voltage microgrids. Different objective functions for optimization process have been analyzed. Moreover, different scenarios for microgrid control system action with respect to communication loss have also been presented. The paper co-authored by A. Moulichon, V. Debusschere, L. Garbuio, M. A. Rahmani, M. Alamir, and N. Hadjsaid [6] is related to the topic of smart grids, too. The paper discusses a virtual synchronous generator and suggests a set of inverter tests. Inverters are supposed to work in a friendly way for isolated microgrids. The paper presents a virtual synchronous generator model and its application in an industrial inverter controller. The application of the proposed solution when utilised in large projects is presented. To determine the necessary directions of their development, requirements for future network-friendly generators based on inverters are defined. The conducted tests are aimed at ensuring that once the proposed standards are met, each virtual generator solution can be integrated into the microsystem. The paper co-authored by K. Kurek, Ł. Nogal, R. Kowalik, and M. Januszewski [7] presents software power protection tester that might replace conventional testing setups. The main contribution of the paper is an algorithm of multithreaded tester operation. The presented solution shows that it is possible to Electrical power engineering is one of the earliest research fields that has developed in electrical engineering. It deals with the generation, transmission, and distribution of electric power, considering the issues of efficient and economical use of energy resources. Due to climate change, environmental protection, and the depletion of mineral energy resources, the electric power systems of the future must deal with new challenges. For these reasons, electrical power engineering development does not stand still and currently is driven by the issues such as smart power grid, renewable energy sources integration, storage system, IT and communications technologies, apparatus and devices design, power and voltage control, and enhancement of security of electric ","PeriodicalId":55299,"journal":{"name":"Bulletin of the Polish Academy of Sciences-Technical Sciences","volume":"20 25","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135545557","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Power quality management in electrical grid using SCANN controller-based UPQC","authors":"Varadharajan Balaji, Subramanian Chitra","doi":"10.24425/bpasts.2022.140257","DOIUrl":"https://doi.org/10.24425/bpasts.2022.140257","url":null,"abstract":"","PeriodicalId":55299,"journal":{"name":"Bulletin of the Polish Academy of Sciences-Technical Sciences","volume":"17 24","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135545575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Active power losses and energy efficiency analysis of HPS lamps with electromagnetic control gear and electronic ballast under the sinusoidal and nonsinusoidal condition","authors":"Roman Sikora, Przemysław Markiewicz, Paweł Rózga","doi":"10.24425/bpasts.2021.137194","DOIUrl":"https://doi.org/10.24425/bpasts.2021.137194","url":null,"abstract":"","PeriodicalId":55299,"journal":{"name":"Bulletin of the Polish Academy of Sciences-Technical Sciences","volume":"17 21","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135545578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Execution time prediction model for parallel GPU realizations of discrete transforms computation algorithms","authors":"Dariusz Puchala, Kamil Stokfiszewski, Kamil Wieloch","doi":"10.24425/bpasts.2021.139393","DOIUrl":"https://doi.org/10.24425/bpasts.2021.139393","url":null,"abstract":"Abstract. Parallel realizations of discrete transforms (DTs) computation algorithms (DTCAs) performed on graphics processing units (GPUs) play a significant role in many modern data processing methods utilized in numerous areas of human activity. In this paper the authors propose a novel execution time prediction model, which allows for accurate and rapid estimation of execution times of various kinds of structurally different DTCAs performed on GPUs of distinct architectures, without the necessity of conducting the actual experiments on physical hardware. The model can serve as a guide for the system analyst in making the optimal choice of the GPU hardware solution for a given computational task involving particular DT calculation, or can help in choosing the best appropriate parallel implementation of the selected DT, given the limitations imposed by available hardware. Restricting the model to exhaustively adhere only to the key common features of DTCAs, enables the authors to significantly simplify its structure, leading consequently to its design as a hybrid, analytically–simulationial method, exploiting jointly the main advantages of both of the mentioned techniques, namely: time-effectiveness and high prediction accuracy, while, at the same time, causing mutual elimination of the major weaknesses of both of the specified approaches within the proposed solution. The model is validated experimentally on two structurally different parallel methods of discrete wavelet transform (DWT) computation, i.e. the direct convolution-based and lattice structure-based schemes, by comparing its prediction results with the actual measurements taken for 6 different graphics cards, representing a fairly broad spectrum of GPUs’ compute architectures. Experimental results reveal the model’s overall average execution time prediction accuracy to be at a level of 97.2%, with global maximum prediction error of 14.5%, recorded throughout all the conducted experiments, maintaining at the same time high average evaluation speed of 3.5 ms for single simulation duration. The results allow to infer model’s generality and possibility of extrapolation to other DTCAs and different GPU architectures, what, along with the proposed model’s straightforwardness, time-effectiveness and ease of practical application, makes it, in the authors’ opinion, a very interesting alternative to the related existing solutions.","PeriodicalId":55299,"journal":{"name":"Bulletin of the Polish Academy of Sciences-Technical Sciences","volume":"13 11","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135545602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}