Pub Date : 2023-07-20DOI: 10.24425/mms.2022.140030
M. Singh, Mandeep Singh
The cognitive aspects like perception, problem-solving, thinking, task performance, etc., are immensely influenced by emotions making it necessary to study emotions. The best state of emotion is the positive unexcitedstate,alsoknownastheHighValenceLowArousal(HVLA)stateoftheemotion.Thepsychologists endeavourtobringthesubjectsfromanegativelyexcitedstateofemotion(LowValenceHighArousalstate) toapositiveunexcitedstateofemotion(HighValenceLowArousalstate).Inthefirstpartofthisstudy, afour-classsubjectindependentemotionclassifierwasdevelopedwithanSVMpolynomialclassifier usingaverageEventRelatedPotential(ERP)anddifferentialaverageERPattributes.Thevisuallyevoked Electroencephalogram(EEG)signalswereacquiredfrom24subjects.Thefour-classclassificationaccuracy was83%usingaverageERPattributesand77%usingdifferentialaverageERPattributes.Inthesecond partofthestudy,themeditativeinterventionwasappliedto20subjectswhodeclaredthemselvesnegatively excited(inLowValenceHighArousalstateofemotion).TheEEGsignalswereacquiredbeforeandafter themeditativeintervention.Thefour-classsubjectindependentemotionclassifierdevelopedinStudy1 correctlyclassifiedthese20subjectstobeinanegativelyexcitedstateofemotion.Aftertheintervention,16 subjectsself-assessedthemselvestobeinapositiveunexcited(HVLA)stateofemotion(whichshowsthe interventionaccuracyof80%).Testingafour-classsubjectindependentemotionclassifierontheEEGdata acquiredafterthemeditativeinterventionvalidated13of16subjectsinapositiveunexcitedstate,yielding anaccuracyof81.3%.
{"title":"Transition of emotions from the negatively excited state to positive unexcited state: an ERP perspective","authors":"M. Singh, Mandeep Singh","doi":"10.24425/mms.2022.140030","DOIUrl":"https://doi.org/10.24425/mms.2022.140030","url":null,"abstract":"The cognitive aspects like perception, problem-solving, thinking, task performance, etc., are immensely influenced by emotions making it necessary to study emotions. The best state of emotion is the positive unexcitedstate,alsoknownastheHighValenceLowArousal(HVLA)stateoftheemotion.Thepsychologists endeavourtobringthesubjectsfromanegativelyexcitedstateofemotion(LowValenceHighArousalstate) toapositiveunexcitedstateofemotion(HighValenceLowArousalstate).Inthefirstpartofthisstudy, afour-classsubjectindependentemotionclassifierwasdevelopedwithanSVMpolynomialclassifier usingaverageEventRelatedPotential(ERP)anddifferentialaverageERPattributes.Thevisuallyevoked Electroencephalogram(EEG)signalswereacquiredfrom24subjects.Thefour-classclassificationaccuracy was83%usingaverageERPattributesand77%usingdifferentialaverageERPattributes.Inthesecond partofthestudy,themeditativeinterventionwasappliedto20subjectswhodeclaredthemselvesnegatively excited(inLowValenceHighArousalstateofemotion).TheEEGsignalswereacquiredbeforeandafter themeditativeintervention.Thefour-classsubjectindependentemotionclassifierdevelopedinStudy1 correctlyclassifiedthese20subjectstobeinanegativelyexcitedstateofemotion.Aftertheintervention,16 subjectsself-assessedthemselvestobeinapositiveunexcited(HVLA)stateofemotion(whichshowsthe interventionaccuracyof80%).Testingafour-classsubjectindependentemotionclassifierontheEEGdata acquiredafterthemeditativeinterventionvalidated13of16subjectsinapositiveunexcitedstate,yielding anaccuracyof81.3%.","PeriodicalId":18394,"journal":{"name":"Metrology and Measurement Systems","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44856429","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}
Pub Date : 2023-07-20DOI: 10.24425/mms.2020.132778
K. Dorywalski, Ł. Chrobak, M. Malinski
Thisworkpresentsresultsofcomparativestudiesoftheopticalabsorptioncoefficientspectraofionimplantedlayersinsilicon.Threenondestructiveandnoncontacttechniqueswereusedforthispurpose:spectroscopicellipsometry(SE),modulatedfreecarriersabsorption(MFCA)andthephotothermalradiometry(PTR).ResultsobtainedwiththeellipsometricmethodaretheproofofcorrectnessoftheresultsobtainedwiththeMFCAandPTRtechniques.Thesetechniquesareusuallyusedforinvestigationsofrecombinationparametersofsemiconductors.Theyarenotusedforinvestigationsoftheopticalparametersofsemiconductors.OpticalabsorptioncoefficientspectraofFe + and Ge + high energy and dose implanted layers in silicon, obtained with the three techniques, are presented and compared.
{"title":"Comparative studies of the optical absorption coefficient spectra in the implanted layers in silicon with the use of nondestructive spectroscopic techniques","authors":"K. Dorywalski, Ł. Chrobak, M. Malinski","doi":"10.24425/mms.2020.132778","DOIUrl":"https://doi.org/10.24425/mms.2020.132778","url":null,"abstract":"Thisworkpresentsresultsofcomparativestudiesoftheopticalabsorptioncoefficientspectraofionimplantedlayersinsilicon.Threenondestructiveandnoncontacttechniqueswereusedforthispurpose:spectroscopicellipsometry(SE),modulatedfreecarriersabsorption(MFCA)andthephotothermalradiometry(PTR).ResultsobtainedwiththeellipsometricmethodaretheproofofcorrectnessoftheresultsobtainedwiththeMFCAandPTRtechniques.Thesetechniquesareusuallyusedforinvestigationsofrecombinationparametersofsemiconductors.Theyarenotusedforinvestigationsoftheopticalparametersofsemiconductors.OpticalabsorptioncoefficientspectraofFe + and Ge + high energy and dose implanted layers in silicon, obtained with the three techniques, are presented and compared.","PeriodicalId":18394,"journal":{"name":"Metrology and Measurement Systems","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44907387","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}
Pub Date : 2023-07-20DOI: 10.24425/mms.2021.137133
Baofeng He, Siyuan Ding, Zhaoyao Shi
Surface roughness has an important influence on the service performance and life of parts. Areal surface roughness has the advantage of accurately and comprehensively characterizing surface microtopography. Understanding the relationship and distinction between profile and areal surface roughness is conducive to deepening the study of areal surface roughness and improving its application. In this paper, the concepts, development, and applications of surface roughness in the profile and the areal are summarized from the aspect of evaluation parameters. The relationships and differences between surface roughness in the profile and the areal are analyzed for each aspect, and future development trends are identified.
{"title":"A comparison between profile and areal surface roughness parameters","authors":"Baofeng He, Siyuan Ding, Zhaoyao Shi","doi":"10.24425/mms.2021.137133","DOIUrl":"https://doi.org/10.24425/mms.2021.137133","url":null,"abstract":"Surface roughness has an important influence on the service performance and life of parts. Areal surface roughness has the advantage of accurately and comprehensively characterizing surface microtopography. Understanding the relationship and distinction between profile and areal surface roughness is conducive to deepening the study of areal surface roughness and improving its application. In this paper, the concepts, development, and applications of surface roughness in the profile and the areal are summarized from the aspect of evaluation parameters. The relationships and differences between surface roughness in the profile and the areal are analyzed for each aspect, and future development trends are identified.","PeriodicalId":18394,"journal":{"name":"Metrology and Measurement Systems","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45093464","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}
Pub Date : 2023-07-20DOI: 10.24425/MMS.2020.132780
W. Jarzyna, Dariusz Zieliński, K. Gopakumar
The grid-tied inverter synchronizes with the network on the basis of the instantaneous voltage phase angle. This angle is computed by the so-called synchronization algorithms. During grid disturbances, it is estimated with a certain accuracy, which varies for different disturbances and depends on the choice of algorithm. The tests presented here determine how to make an optimal selection of the synchronization algorithm. The research methods used are modeling, simulation and analysis of the results obtained. One of the most important outcomes is the determination of the root-mean-square sync error and its dynamics denotation. The research conclusions should be of particular interest to designers of distributed energy systems with a large number of inverter energy sources.
{"title":"An evaluation of the accuracy of inverter sync angle during the grid's disturbances","authors":"W. Jarzyna, Dariusz Zieliński, K. Gopakumar","doi":"10.24425/MMS.2020.132780","DOIUrl":"https://doi.org/10.24425/MMS.2020.132780","url":null,"abstract":"The grid-tied inverter synchronizes with the network on the basis of the instantaneous voltage phase angle. This angle is computed by the so-called synchronization algorithms. During grid disturbances, it is estimated with a certain accuracy, which varies for different disturbances and depends on the choice of algorithm. The tests presented here determine how to make an optimal selection of the synchronization algorithm. The research methods used are modeling, simulation and analysis of the results obtained. One of the most important outcomes is the determination of the root-mean-square sync error and its dynamics denotation. The research conclusions should be of particular interest to designers of distributed energy systems with a large number of inverter energy sources.","PeriodicalId":18394,"journal":{"name":"Metrology and Measurement Systems","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43223005","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}
Pub Date : 2023-07-20DOI: 10.24425/mms.2022.140027
Wenhao Zhao, Shulin Tian, Guangkun Guo, Jiajing You, Qiong Wu, Ke Liu
The arbitrary waveform generator is characterised by its flexible signal generation, high frequency resolution and rapid frequency switching speed and is wildly used in fields like communication, radar systems, quantum control, astronautics and biomedicine. With continuous development of technology, higher requirements are placed on to the arbitrary waveform generator. Sampling rate determines the bandwidth of the output signal, spurious-free dynamic range determines the quality of generated signal. Due to above, these two indicators’ improvement is vital. However, the existing waveform generation methods cannot generate signals with quality good enough due to their technical limitations, and in order to realize a high system sampling rate, to accomplish waveform generation process in FPGA, multipath parallel structure is needed. Therefore, we proposed a parallel waveform synthesis structure based on digital resampling, which fixed the problems existing in the current methods effectively and achieved a high sampling rate as well as high quality arbitrary waveform synthesis. We also built up an experimental test bench to validate the proposed structure.
{"title":"An arbitrary waveform synthesis structure with high sampling rate and low spurious","authors":"Wenhao Zhao, Shulin Tian, Guangkun Guo, Jiajing You, Qiong Wu, Ke Liu","doi":"10.24425/mms.2022.140027","DOIUrl":"https://doi.org/10.24425/mms.2022.140027","url":null,"abstract":"The arbitrary waveform generator is characterised by its flexible signal generation, high frequency resolution and rapid frequency switching speed and is wildly used in fields like communication, radar systems, quantum control, astronautics and biomedicine. With continuous development of technology, higher requirements are placed on to the arbitrary waveform generator. Sampling rate determines the bandwidth of the output signal, spurious-free dynamic range determines the quality of generated signal. Due to above, these two indicators’ improvement is vital. However, the existing waveform generation methods cannot generate signals with quality good enough due to their technical limitations, and in order to realize a high system sampling rate, to accomplish waveform generation process in FPGA, multipath parallel structure is needed. Therefore, we proposed a parallel waveform synthesis structure based on digital resampling, which fixed the problems existing in the current methods effectively and achieved a high sampling rate as well as high quality arbitrary waveform synthesis. We also built up an experimental test bench to validate the proposed structure.","PeriodicalId":18394,"journal":{"name":"Metrology and Measurement Systems","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42030031","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}
P. Kisała, K. Skorupski, S. Cięszczyk, P. Panas, J. Klimek
The paper presents a method of measuring the angle of rotation and twist using a tilted fibre Bragg grating (TFBG) periodic structure with a tilt angle of 6◦, written into a single-mode optical fibre. It has been shown that the rotation of the sensor by 180◦ causes a change in the transmission coefficient from 0.5 to 0.84 at a wavelength of 1541.2 nm. As a result of measurements it was determined that the highest sensitivity can be obtained for angles from 30◦ to 70◦ in relation to the basic orientation. The change in the transmission spectrum occurs for cladding modes that change their intensity with the change in the polarization of light propagating through the grating. The same structure can also be used to measure the twist angle. The possibility of obtaining a TFBG twist by 200◦ over a length of 10 mm has been proved. This makes it possible to monitor both the angle of rotation and the twist of an optical fibre with the fabricated TFBG.
{"title":"Rotation and twist measurement using tilted fibre bragg gratings","authors":"P. Kisała, K. Skorupski, S. Cięszczyk, P. Panas, J. Klimek","doi":"10.24425/123893","DOIUrl":"https://doi.org/10.24425/123893","url":null,"abstract":"The paper presents a method of measuring the angle of rotation and twist using a tilted fibre Bragg grating (TFBG) periodic structure with a tilt angle of 6◦, written into a single-mode optical fibre. It has been shown that the rotation of the sensor by 180◦ causes a change in the transmission coefficient from 0.5 to 0.84 at a wavelength of 1541.2 nm. As a result of measurements it was determined that the highest sensitivity can be obtained for angles from 30◦ to 70◦ in relation to the basic orientation. The change in the transmission spectrum occurs for cladding modes that change their intensity with the change in the polarization of light propagating through the grating. The same structure can also be used to measure the twist angle. The possibility of obtaining a TFBG twist by 200◦ over a length of 10 mm has been proved. This makes it possible to monitor both the angle of rotation and the twist of an optical fibre with the fabricated TFBG.","PeriodicalId":18394,"journal":{"name":"Metrology and Measurement Systems","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44247087","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}
Pub Date : 2023-07-20DOI: 10.24425/MMS.2019.130566
Rong Guo, Xueyun Wang, Jingjuan Zhang, Tianxiao Song
Rotation modulation can significantly improve the navigation accuracies of an inertial navigation system (INS) and a strap-down configuration dominating in this type of INS. However, this style of construction is not a good scheme since it has no servo loop to counteract a vehicle manoeuvre. This paper proposes a rotary upgrading method for a rotational INS based on an inertially stabilized platform. The servo control loop is reconstructed on a four-gimbal platform, and it has the functions of providing both a level stability relative to the navigation frame and an azimuth rotation at a speed of 1.2◦/s. With the platform’s rotation, the observability and the convergence speed of the estimation for the initial alignment can be improved, as well as the biases of the gyroscopes and accelerometers be modulated into zero-mean periodic values. An open-loop initial alignment method is designed, and its detailed algorithms are delivered. The experiment result shows that the newly designed rotational INS has reached an accuracy of 0.38 n mile/h (CEP, circular error probable). The feasibility and engineering applicability of the designed scheme have been validated.
{"title":"Rotary upgrading method and its experimental study of an inertially stabilized platform","authors":"Rong Guo, Xueyun Wang, Jingjuan Zhang, Tianxiao Song","doi":"10.24425/MMS.2019.130566","DOIUrl":"https://doi.org/10.24425/MMS.2019.130566","url":null,"abstract":"Rotation modulation can significantly improve the navigation accuracies of an inertial navigation system (INS) and a strap-down configuration dominating in this type of INS. However, this style of construction is not a good scheme since it has no servo loop to counteract a vehicle manoeuvre. This paper proposes a rotary upgrading method for a rotational INS based on an inertially stabilized platform. The servo control loop is reconstructed on a four-gimbal platform, and it has the functions of providing both a level stability relative to the navigation frame and an azimuth rotation at a speed of 1.2◦/s. With the platform’s rotation, the observability and the convergence speed of the estimation for the initial alignment can be improved, as well as the biases of the gyroscopes and accelerometers be modulated into zero-mean periodic values. An open-loop initial alignment method is designed, and its detailed algorithms are delivered. The experiment result shows that the newly designed rotational INS has reached an accuracy of 0.38 n mile/h (CEP, circular error probable). The feasibility and engineering applicability of the designed scheme have been validated.","PeriodicalId":18394,"journal":{"name":"Metrology and Measurement Systems","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44278607","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}
Pub Date : 2023-07-20DOI: 10.24425/mms.2022.138550
Sławomir Janas, T. Magiera, T. Szumiata
This work presents a method for measuring the magnetic susceptibility of soil samples based on interactions of magnetic particles contained in a tested sample with a weighed permanent magnet placed in the balance mechanical design. The MYA 2.4Y microbalance manufactured by Radwag Wagi Elektroniczne, Poland, was used to perform mass measurements. The weighing system was adjusted for mass indication using a certified mass standard, and for magnetic susceptibility indication using a certified magnetic susceptibility standard. The volume of each analysed soil sample was 3.93 cm 3 and was similar to the volume and the size of the magnetic susceptibility standard. The research was carried out for 10 soil samples with a magnetic susceptibility range varying from 20 to 1600 × 10 − 8 m 3 kg − 1 . The soil samples contained technogenic magnetic particles and particles of natural magnetite of geogenic origin. The study was performed for a field of 2 mT.
这项工作提出了一种测量土壤样品磁化率的方法，该方法基于测试样品中包含的磁性颗粒与天平机械设计中放置的称重永磁体的相互作用。使用波兰Radwag Wagi Elektroniczne公司生产的MYA 2.4Y微量天平进行质量测量。称重系统使用确定的质量标准进行质量指示调整，使用确定的磁化率标准进行磁化率指示调整。每个分析土壤样品的体积为3.93cm3，与磁化率标准的体积和大小相似。本研究对10个磁化率范围为20～1600×10−8 m 3 kg−1的土壤样品进行了研究。土壤样品含有技术成因的磁性颗粒和地质成因的天然磁铁矿颗粒。该研究在2 mT的场地内进行。
{"title":"Susceptometer in soil magnetic susceptibility studies","authors":"Sławomir Janas, T. Magiera, T. Szumiata","doi":"10.24425/mms.2022.138550","DOIUrl":"https://doi.org/10.24425/mms.2022.138550","url":null,"abstract":"This work presents a method for measuring the magnetic susceptibility of soil samples based on interactions of magnetic particles contained in a tested sample with a weighed permanent magnet placed in the balance mechanical design. The MYA 2.4Y microbalance manufactured by Radwag Wagi Elektroniczne, Poland, was used to perform mass measurements. The weighing system was adjusted for mass indication using a certified mass standard, and for magnetic susceptibility indication using a certified magnetic susceptibility standard. The volume of each analysed soil sample was 3.93 cm 3 and was similar to the volume and the size of the magnetic susceptibility standard. The research was carried out for 10 soil samples with a magnetic susceptibility range varying from 20 to 1600 × 10 − 8 m 3 kg − 1 . The soil samples contained technogenic magnetic particles and particles of natural magnetite of geogenic origin. The study was performed for a field of 2 mT.","PeriodicalId":18394,"journal":{"name":"Metrology and Measurement Systems","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43481169","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}
Pub Date : 2023-07-20DOI: 10.24425/mms.2021.137707
Oumaima Mesbahi, M. Tlemçani, F. Janeiro, Abdeloawahed Hajjaji, K. Kandoussi
The degradation of photovoltaic modules and their subsequent loss of performance has a serious impact on the total energy generation potential. The lack of real-time information on the output power leads to additional losses since the panels may not be operating at their optimal point. To understand the behaviour, numerically simulate the characteristics and identify the optimal operating point of a photovoltaic cell, the parameters of an equivalent electrical circuit must first be identified. The aim of this work is to develop a total least-squares based algorithm which can identify those parameters from the output voltage and current measurements, taking into consideration the uncertainties on both measured quantities. This work presents a comparative study of the Ordinary Least Squares (OLS) and Total Least Squares (TLS) approaches to the estimation of the parameters of a photovoltaic cell.
{"title":"Sensitivity analysis of a new approach to photovoltaic parameters extraction based on the total least squares method","authors":"Oumaima Mesbahi, M. Tlemçani, F. Janeiro, Abdeloawahed Hajjaji, K. Kandoussi","doi":"10.24425/mms.2021.137707","DOIUrl":"https://doi.org/10.24425/mms.2021.137707","url":null,"abstract":"The degradation of photovoltaic modules and their subsequent loss of performance has a serious impact on the total energy generation potential. The lack of real-time information on the output power leads to additional losses since the panels may not be operating at their optimal point. To understand the behaviour, numerically simulate the characteristics and identify the optimal operating point of a photovoltaic cell, the parameters of an equivalent electrical circuit must first be identified. The aim of this work is to develop a total least-squares based algorithm which can identify those parameters from the output voltage and current measurements, taking into consideration the uncertainties on both measured quantities. This work presents a comparative study of the Ordinary Least Squares (OLS) and Total Least Squares (TLS) approaches to the estimation of the parameters of a photovoltaic cell.","PeriodicalId":18394,"journal":{"name":"Metrology and Measurement Systems","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43912065","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}
Pub Date : 2023-07-20DOI: 10.24425/mms.2022.138544
M. Neska, T. Opara
An adsorber in which sorption processes occur is one of the key components of an adsorption chiller. Precise real-time monitoring of and supervision over these processes are particularly important to ensure their proper execution. The article describes the experimental stand used for the measurement of the adsorber’s operating parameters and analyses pressure measurement uncertainties, taking into account the impact of the temperature on the test system filled with the adsorbent in the form of silica gel, while concurrently considering the influence of other factors (e.g. the environment, the A/A, and A/D conversion, or data processing) on measurement uncertainties. A complex analysis of uncertainties was carried out, including the results of the statistical analysis of the measurement data obtained from long-term experimental tests of the object and the uncertainties of the pressure measuring chain by the type B method, involving the consideration of interactions between the system components and the temperature impact on the propagation of uncertainties. As part of the analysis, the characteristic stages of the data collection and processing operations related to the sampling rate and measurement intervals were separated. The article presents the prototype test stand and original pressure measurement system for the verification of a single-bed adsorber working below 10 hPa.The novel construction of a single-bed adsorber was used as a test object. Furthermore, in this paper, the developed algorithm of the research method implemented in the system was discussed and positively verified.
{"title":"Uncertainty of pressure measurement in a single-bed adsorber","authors":"M. Neska, T. Opara","doi":"10.24425/mms.2022.138544","DOIUrl":"https://doi.org/10.24425/mms.2022.138544","url":null,"abstract":"An adsorber in which sorption processes occur is one of the key components of an adsorption chiller. Precise real-time monitoring of and supervision over these processes are particularly important to ensure their proper execution. The article describes the experimental stand used for the measurement of the adsorber’s operating parameters and analyses pressure measurement uncertainties, taking into account the impact of the temperature on the test system filled with the adsorbent in the form of silica gel, while concurrently considering the influence of other factors (e.g. the environment, the A/A, and A/D conversion, or data processing) on measurement uncertainties. A complex analysis of uncertainties was carried out, including the results of the statistical analysis of the measurement data obtained from long-term experimental tests of the object and the uncertainties of the pressure measuring chain by the type B method, involving the consideration of interactions between the system components and the temperature impact on the propagation of uncertainties. As part of the analysis, the characteristic stages of the data collection and processing operations related to the sampling rate and measurement intervals were separated. The article presents the prototype test stand and original pressure measurement system for the verification of a single-bed adsorber working below 10 hPa.The novel construction of a single-bed adsorber was used as a test object. Furthermore, in this paper, the developed algorithm of the research method implemented in the system was discussed and positively verified.","PeriodicalId":18394,"journal":{"name":"Metrology and Measurement Systems","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43368550","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}
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