Measurement Science Review最新文献_第4页

Docking Pose Measurement Method for Large Components Based on Draw-Wire Displacement Sensors 基于拉丝位移传感器的大型部件对接位姿测量方法

4区工程技术

Measurement Science Review Pub Date : 2023-10-01 DOI: 10.2478/msr-2023-0027

Zheng-yang Sun, Hong-xi Wang, Hui-hui Tian, Bing Liu

{"title":"Docking Pose Measurement Method for Large Components Based on Draw-Wire Displacement Sensors","authors":"Zheng-yang Sun, Hong-xi Wang, Hui-hui Tian, Bing Liu","doi":"10.2478/msr-2023-0027","DOIUrl":"https://doi.org/10.2478/msr-2023-0027","url":null,"abstract":"Abstract A method for measuring the docking pose of large components based on the draw-wire displacement sensor is proposed. In this method, coordinate systems and measurement points are established on the docking surfaces of fixed and moving components. The draw-wire displacement sensor is used to measure the distances between these measurement points. A mathematical model based on the distances between the measurement points is established, and the three-sphere rendezvous positioning principle is optimized to obtain the spatial positions of the measurement points. Consequently, the pose deviations of the fixed and moving components in all six degrees of freedom (6DOF) are determined. A simulation analysis of the measurement uncertainty of the obtained pose deviations is performed, resulting in a composite standard uncertainty obtained from the measurement standard uncertainties of different sensors. The simulation results show that the composite standard uncertainty is most affected in the x -axis translation direction and least affected in the x -axis rotation direction. With this method, only the distances between the measurement points need to be measured to determine the corresponding pose relationships. The cost of the equipment is low, and it is not easily affected by external factors such as the environment.","PeriodicalId":49848,"journal":{"name":"Measurement Science Review","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135811246","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}

引用次数: 0

In vivo Volumetric, DTI and ¹H MRS Rat Brain Protocol for Monitoring Early Neurodegeneration and Efficacy of the Used Therapy 体内容积法、DTI和1H MRS监测早期神经退行性变的大鼠脑方案及其治疗效果

4区工程技术

Measurement Science Review Pub Date : 2023-10-01 DOI: 10.2478/msr-2023-0030

Tomáš Tvrdík, Ľubomír Melicherčík, Katarína Šebeková, Jakub Szabó, Marianna Maková, Daniel Gogola, Svatava Kašparová

引用次数: 0

The Effect of Differential Pressure and Permanent Pressure Loss on Multi-Hole Orifice Plate 压差和永久压力损失对多孔孔板的影响

4区工程技术

Measurement Science Review Pub Date : 2023-10-01 DOI: 10.2478/msr-2023-0029

TM Hariguru, S Srinivasan

{"title":"The Effect of Differential Pressure and Permanent Pressure Loss on Multi-Hole Orifice Plate","authors":"TM Hariguru, S Srinivasan","doi":"10.2478/msr-2023-0029","DOIUrl":"https://doi.org/10.2478/msr-2023-0029","url":null,"abstract":"Abstract The widely used orifice plate falls under restricted type flow devices, has the highest differential pressure and permanent pressure drop in the ensemble. The objective is to curtail the permanent pressure drop and maintain the differential pressure across the orifice plate, and thereby, the power required to pump the liquid is retrenched. So, three-hole, four-hole and five-hole orifice plates with an identical area to that of the single-hole orifice plate were designed and experiments were carried out. It is observed that the experimental results almost matched with the simulation data. In comparing the performance, the four-hole orifice plate yielded a higher differential pressure and higher-pressure loss. In contrast, the five-hole orifice yielded lower differential pressure and higher-pressure loss compared to the single-hole orifice plate. In case of three-hole orifice plate it performed better than the single-hole orifice with reduced pressure loss and higher differential pressure. It was also found that the power consumed by the pump for pumping was lower for three-hole, four-hole and five-hole orifice plates compared to the single-hole orifice plate. Thus, the three-hole orifice plate performs better than a single-hole orifice plate in terms of higher differential pressure, reduced permanent pressure loss and lower power consumption of the pump.","PeriodicalId":49848,"journal":{"name":"Measurement Science Review","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135811470","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}

引用次数: 0

Against the Flow of Time with Multi-Output Models 利用多输出模型对抗时间流

IF 0.9 4区工程技术

Measurement Science Review Pub Date : 2023-08-01 DOI: 10.2139/ssrn.4157513

J. Jakubík, Mary Phuong, M. Chvosteková, A. Krakovská

{"title":"Against the Flow of Time with Multi-Output Models","authors":"J. Jakubík, Mary Phuong, M. Chvosteková, A. Krakovská","doi":"10.2139/ssrn.4157513","DOIUrl":"https://doi.org/10.2139/ssrn.4157513","url":null,"abstract":"Abstract Recent work has paid close attention to the first principle of Granger causality, according to which cause precedes effect. In this context, the question may arise whether the detected direction of causality also reverses after the time reversal of unidirectionally coupled data. Recently, it has been shown that for unidirectionally causally connected autoregressive (AR) processes X → Y, after time reversal of data, the opposite causal direction Y → X is indeed detected, although typically as part of the bidirectional X ↔ Y link. As we argue here, the answer is different when the measured data are not from AR processes but from linked deterministic systems. When the goal is the usual forward data analysis, cross-mapping-like approaches correctly detect X → Y, while Granger causality-like approaches, which should not be used for deterministic time series, detect causal independence X ⫫ Y . The results of backward causal analysis depend on the predictability of the reversed data. Unlike AR processes, observables from deterministic dynamical systems, even complex nonlinear ones, can be predicted well forward, while backward predictions can be difficult (notably when the time reversal of a function leads to one-to-many relations). To address this problem, we propose an approach based on models that provide multiple candidate predictions for the target, combined with a loss function that consideres only the best candidate. The resulting good forward and backward predictability supports the view that unidirectionally causally linked deterministic dynamical systems X → Y can be expected to detect the same link both before and after time reversal.","PeriodicalId":49848,"journal":{"name":"Measurement Science Review","volume":"23 1","pages":"175 - 183"},"PeriodicalIF":0.9,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48156554","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}

引用次数: 0

Combination of Non-contact and Contact Measuring Methods for Analyzing Structural Conditions of Dry Transformers 非接触式与接触式相结合的干式变压器结构状态分析方法

4区工程技术

Measurement Science Review Pub Date : 2023-08-01 DOI: 10.2478/msr-2023-0020

Miroslav Gutten, Daniel Korenciak, Martin Karman, Peter Brncal, Matej Kucera, Tomasz N. Koltunowicz, Maciej Sulowicz

引用次数: 0

Glucose Concentration Monitoring Using Microstrip Spurline Sensor 利用微带脉冲线传感器监测葡萄糖浓度

4区工程技术

Measurement Science Review Pub Date : 2023-08-01 DOI: 10.2478/msr-2023-0022

Supakorn Harnsoongnoen, Benjaporn Buranrat

引用次数: 0

Attitude Control and Parameter Optimization: A Study on Hubble Space Telescope 哈勃空间望远镜姿态控制与参数优化研究

4区工程技术

Measurement Science Review Pub Date : 2023-08-01 DOI: 10.2478/msr-2023-0019

Emre Sayin, Rahman Bitirgen, Ismail Bayezit

{"title":"Attitude Control and Parameter Optimization: A Study on Hubble Space Telescope","authors":"Emre Sayin, Rahman Bitirgen, Ismail Bayezit","doi":"10.2478/msr-2023-0019","DOIUrl":"https://doi.org/10.2478/msr-2023-0019","url":null,"abstract":"Abstract In this work, we build a satellite attitude Proportional-Integral-Derivative (PID) controlled system by using the Hubble Space Telescope (HST) parameters as a reference and tune its controller parameters using various tuning methods. First, we give the equations for the motion of a satellite. We elaborate the control structure as controller, actuator, dynamics, and kinematics subsystems and construct an external disturbance model. We use a reaction wheel assembly used in the HST with the same configuration as the actuator. We evaluate the performance of the linearization by comparing it with the nonlinear model output. By working on the linearized model, we tune the PID controller parameters using two different methods: “Model-Based Root Locus Tuning” and “Genetic Algorithm Based Tuning”. First, we obtain the controller parameters by manipulating the poles on the root locus plot of the linearized system. In addition, we use genetic algorithms to find the optimized controller values of the system. Finally, we compare the performances of the two methods based on their cost function values and find that the Genetic Algorithm-based tuned parameters are more fruitful in terms of the cost function value than the parameters obtained by the Root Locus-based tuning. However, it is found that the Root Locus-based tuning performs better in disturbance rejection.","PeriodicalId":49848,"journal":{"name":"Measurement Science Review","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135003991","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}

引用次数: 0

Against the Flow of Time with Multi-Output Models 用多输出模型对抗时间流

4区工程技术

Measurement Science Review Pub Date : 2023-08-01 DOI: 10.2478/msr-2023-0023

Jozef Jakubík, Mary Phuong, Martina Chvosteková, Anna Krakovská

{"title":"Against the Flow of Time with Multi-Output Models","authors":"Jozef Jakubík, Mary Phuong, Martina Chvosteková, Anna Krakovská","doi":"10.2478/msr-2023-0023","DOIUrl":"https://doi.org/10.2478/msr-2023-0023","url":null,"abstract":"Abstract Recent work has paid close attention to the first principle of Granger causality, according to which cause precedes effect. In this context, the question may arise whether the detected direction of causality also reverses after the time reversal of unidirectionally coupled data. Recently, it has been shown that for unidirectionally causally connected autoregressive (AR) processes X → Y , after time reversal of data, the opposite causal direction Y → X is indeed detected, although typically as part of the bidirectional X ↔ Y link. As we argue here, the answer is different when the measured data are not from AR processes but from linked deterministic systems. When the goal is the usual forward data analysis, cross-mapping-like approaches correctly detect X → Y , while Granger causality-like approaches, which should not be used for deterministic time series, detect causal independence X ⫫ Y . The results of backward causal analysis depend on the predictability of the reversed data. Unlike AR processes, observables from deterministic dynamical systems, even complex nonlinear ones, can be predicted well forward, while backward predictions can be difficult (notably when the time reversal of a function leads to one-to-many relations). To address this problem, we propose an approach based on models that provide multiple candidate predictions for the target, combined with a loss function that consideres only the best candidate. The resulting good forward and backward predictability supports the view that unidirectionally causally linked deterministic dynamical systems X → Y can be expected to detect the same link both before and after time reversal.","PeriodicalId":49848,"journal":{"name":"Measurement Science Review","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135003980","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}

引用次数: 0

Single and Multi-Point Non-Orthogonal Multiple Access based Power Adaptive Design for Improving Bit Error Ratio 基于单点和多点非正交多址的提高误码率功率自适应设计

4区工程技术

Measurement Science Review Pub Date : 2023-08-01 DOI: 10.2478/msr-2023-0024

G. Kavitha, J. Deny

{"title":"Single and Multi-Point Non-Orthogonal Multiple Access based Power Adaptive Design for Improving Bit Error Ratio","authors":"G. Kavitha, J. Deny","doi":"10.2478/msr-2023-0024","DOIUrl":"https://doi.org/10.2478/msr-2023-0024","url":null,"abstract":"Abstract In the framework of next-generation communication systems, Non-Orthogonal Multiple Access (NOMA) has attracted considerable interest. The fundamental advantage is that it has greater spectrum utilization than its orthogonal equivalents. This proposed work integrates Single-Input Single-Output NOMA (SISO) with Coordinated Multi-Point (CoMP). It uses both systems based on Quadrature Phase-Shift Keying (QPSK). A power-tolerant NOMA reduces the system’s vulnerability to erroneous power allocation by adaptively modifying each user’s signal power. The transmitted data is used to modify the power in the Power-Adaptive NOMA (PANOMA). PANOMA helps improve the Bit Error ratio and also improves the computational complexity. The Bit Error Rate (BER) and the lower limit capacity efficiency across Rayleigh fading channels are determined in precise closure representations of more than two consumer situations to measure its capability. The proposed method PA-CoMP-NOMA improves the Bit Error ratio in both systems. It improves the average BER among all users. Compared to its orthogonal cousin, NOMA has higher spectral efficiency. Nevertheless, our proposed method retains this feature as well as superior BER performance, although its spectral effectiveness is lower than that of the classic sum-rate based power NOMA.","PeriodicalId":49848,"journal":{"name":"Measurement Science Review","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135003979","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}

引用次数: 0

Design and Construction of Metrological Equipment for Torque Sensors with a Carbon-based Measuring Arm 碳基测量臂扭矩传感器计量装置的设计与制造

4区工程技术

Measurement Science Review Pub Date : 2023-08-01 DOI: 10.2478/msr-2023-0021

Ľuboš Kučera, Tomáš Gajdošík, Igor Gajdáč, Lukáš Pompáš, Lukáš Smetanka, Viktor Witkovský, Gejza Wimmer

{"title":"Design and Construction of Metrological Equipment for Torque Sensors with a Carbon-based Measuring Arm","authors":"Ľuboš Kučera, Tomáš Gajdošík, Igor Gajdáč, Lukáš Pompáš, Lukáš Smetanka, Viktor Witkovský, Gejza Wimmer","doi":"10.2478/msr-2023-0021","DOIUrl":"https://doi.org/10.2478/msr-2023-0021","url":null,"abstract":"Abstract The paper presents a comprehensive design of metrological equipment for torque sensor verification and calibration, detailing the process from conception to construction and highlighting the specifics of the structural design to meet metrological requirements. The measuring device’s functionality and the individual structural components are described, as is the methodology for creating a complete product. The paper addresses the crucial issue of measurement uncertainty and the required accuracy, achieved through the construction of a special measuring arm made of carbon material. FEM analyses of the carbon arm are presented and compared with the required metrological accuracies. In addition, we discuss the different properties of various carbon structures in Pre-preg materials used in the construction of the measuring arm and present the results of measurements on such carbon materials. This paper provides a comprehensive insight into the design and construction of metrological equipment for torque sensors, with a focus on its compliance with metrological requirements. The proposed device aims to establish the foundations for primary metrology of torque in Slovakia and has potential applications in a wide range of industries.","PeriodicalId":49848,"journal":{"name":"Measurement Science Review","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135003994","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}

引用次数: 0