Pub Date : 2021-10-08DOI: 10.37394/232022.2021.1.11
S. Fiori, Nicola Sabino, A. Bonci
The present paper reports on the current progress about the laboratory-based assessment of the fluency of attitude maneuvering of a quadcopter. The manuscript illustrates a laboratory-based data-acquisition setup and a mathematical data-processing algorithm to test a novel attitude maneuvering fluency estimation index termed geometric lurch. The geometric lurch index is defined in terms of angular variables’ values as returned by gyroscopic sensors that a quadcopter vehicle is equipped with. The results of several numerical tests, conducted on both synthetic and real-world gyroscopic signals, show that the geometric lurch index is fairly sensitive to the fluency of attitude maneuvering.
{"title":"In-Lab Drone’s Attitude Maneuvering Fluency Evaluation by a Gyroscopic Lurch Index","authors":"S. Fiori, Nicola Sabino, A. Bonci","doi":"10.37394/232022.2021.1.11","DOIUrl":"https://doi.org/10.37394/232022.2021.1.11","url":null,"abstract":"The present paper reports on the current progress about the laboratory-based assessment of the fluency of attitude maneuvering of a quadcopter. The manuscript illustrates a laboratory-based data-acquisition setup and a mathematical data-processing algorithm to test a novel attitude maneuvering fluency estimation index termed geometric lurch. The geometric lurch index is defined in terms of angular variables’ values as returned by gyroscopic sensors that a quadcopter vehicle is equipped with. The results of several numerical tests, conducted on both synthetic and real-world gyroscopic signals, show that the geometric lurch index is fairly sensitive to the fluency of attitude maneuvering.","PeriodicalId":443735,"journal":{"name":"DESIGN, CONSTRUCTION, MAINTENANCE","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126240558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-19DOI: 10.37394/232022.2021.1.10
Brendan Hayes, M. Condon
Extraneous noise signals can greatly downgrade the performance of a buck converter. In this paper, we investigate the use of an adaptive notch filter to dampen oscillations caused by perturbations of the input voltage. Typically, time-frequency analysis is carried out using traditional techniques such as the Fourier Transform or the Short-Term Fourier Transform. However, both of these methods require the signal to be stationary in its entirety or to be broken down into the sum of several stationary signals. Thus, these techniques are limited in their application. We propose using the Hilbert-Huang Transform to analyse in the timefrequency domain and identify the frequency of the non-stationary input. This can be used to tune the adaptive notch filter and the paper outlines a method for real-time application of the Hilbert Huang Transform.
{"title":"Application of the Real-Time Hilbert Huang Transform to a Noise Perturbed Buck Converter","authors":"Brendan Hayes, M. Condon","doi":"10.37394/232022.2021.1.10","DOIUrl":"https://doi.org/10.37394/232022.2021.1.10","url":null,"abstract":"Extraneous noise signals can greatly downgrade the performance of a buck converter. In this paper, we investigate the use of an adaptive notch filter to dampen oscillations caused by perturbations of the input voltage. Typically, time-frequency analysis is carried out using traditional techniques such as the Fourier Transform or the Short-Term Fourier Transform. However, both of these methods require the signal to be stationary in its entirety or to be broken down into the sum of several stationary signals. Thus, these techniques are limited in their application. We propose using the Hilbert-Huang Transform to analyse in the timefrequency domain and identify the frequency of the non-stationary input. This can be used to tune the adaptive notch filter and the paper outlines a method for real-time application of the Hilbert Huang Transform.","PeriodicalId":443735,"journal":{"name":"DESIGN, CONSTRUCTION, MAINTENANCE","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130474169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-08-17DOI: 10.37394/232022.2021.1.9
Ji-Yong Jung, S. Bok, Bong-Ok Kim, Yonggwan Won, Jung-Ja Kim
This study was investigated the effects of the adolescent idiopathic scoliosis on dynamic trunk motion using ultrasound-based motion analysis system. 15 subjects were participated in this study and divided into three groups according to the curve direction. Experimental procedure was divided into two sections: initial position, and left/right lateral bending position. To analyze the alteration of the trunk motion, ultrasound markers was represented the segments. There were significant differences in angle variation between left and right side during lateral bending for the scoliotic groups. In addition, angle differences between left and right side were decreased gradually according to the regions of scoliotic curvature. From these results, it was concluded that the direction and region of the abnormal lateral curvature can influence on dynamic trunk movement and postural balance. Furthermore, ultrasound-based motion analysis system can be utilized to detect asymmetrical balance and dynamic postural change of idiopathic scoliosis patients in adolescence.
{"title":"Evaluation of the Dynamic Trunk Motion of Scoliotic Patients Using Ultrasound-based Motion Analysis System","authors":"Ji-Yong Jung, S. Bok, Bong-Ok Kim, Yonggwan Won, Jung-Ja Kim","doi":"10.37394/232022.2021.1.9","DOIUrl":"https://doi.org/10.37394/232022.2021.1.9","url":null,"abstract":"This study was investigated the effects of the adolescent idiopathic scoliosis on dynamic trunk motion using ultrasound-based motion analysis system. 15 subjects were participated in this study and divided into three groups according to the curve direction. Experimental procedure was divided into two sections: initial position, and left/right lateral bending position. To analyze the alteration of the trunk motion, ultrasound markers was represented the segments. There were significant differences in angle variation between left and right side during lateral bending for the scoliotic groups. In addition, angle differences between left and right side were decreased gradually according to the regions of scoliotic curvature. From these results, it was concluded that the direction and region of the abnormal lateral curvature can influence on dynamic trunk movement and postural balance. Furthermore, ultrasound-based motion analysis system can be utilized to detect asymmetrical balance and dynamic postural change of idiopathic scoliosis patients in adolescence.","PeriodicalId":443735,"journal":{"name":"DESIGN, CONSTRUCTION, MAINTENANCE","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132523077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-05-08DOI: 10.37394/232022.2021.1.6
D. Bellan
This paper provides an approximate analytical approach leading to the statistical characterization of the electric active/reactive power related to the harmonics in the real-time monitoring of a power system affected by frequency instability. The effect of additive noise is also included in the analysis. Frequency instability of voltage and current waveforms is modeled as a random variable ranging within a given frequency interval. Propagation of both the uncertainty sources through the whole measurement process based on analogto- digital conversion and discrete Fourier transform is investigated. Power evaluation is performed by proper multiplication of waveforms spectra. In fact, the requirement of real-time monitoring prevents the use of sophisticated algorithms to cope with the frequency change before spectra multiplication. Analytical expressions taking into account the weighting function used against spectral leakage are derived for the bias and the standard deviation of the measured power.
{"title":"Statistical Effects of Frequency Instability on Continuous Monitoring of Active and Reactive Power","authors":"D. Bellan","doi":"10.37394/232022.2021.1.6","DOIUrl":"https://doi.org/10.37394/232022.2021.1.6","url":null,"abstract":"This paper provides an approximate analytical approach leading to the statistical characterization of the electric active/reactive power related to the harmonics in the real-time monitoring of a power system affected by frequency instability. The effect of additive noise is also included in the analysis. Frequency instability of voltage and current waveforms is modeled as a random variable ranging within a given frequency interval. Propagation of both the uncertainty sources through the whole measurement process based on analogto- digital conversion and discrete Fourier transform is investigated. Power evaluation is performed by proper multiplication of waveforms spectra. In fact, the requirement of real-time monitoring prevents the use of sophisticated algorithms to cope with the frequency change before spectra multiplication. Analytical expressions taking into account the weighting function used against spectral leakage are derived for the bias and the standard deviation of the measured power.","PeriodicalId":443735,"journal":{"name":"DESIGN, CONSTRUCTION, MAINTENANCE","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132584766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-04-10DOI: 10.37394/232022.2021.1.5
E. T. Quartey, P. Lesáková, I. Obršálová
This paper presents a systematic method for calculating regional level Environmental sustainability by using the sustainable value approach. The quest for achieving sustainability has led to the development of various tools and measures for structuring and conducting sustainable development policy analyses and the metrics used for the measurement of sustainability are still evolving. Sustainable Value approach is another simple tool for measuring sustainability performance. In general, Sustainable Value integrates the three dimensions of sustainability: the economic development, environmental sustainability and social development. This paper uses the principles of the sustainable value approach to calculate the environmental sustainability of the regions of the Czech Republic.
{"title":"Comparison of Environmental Performance of the Regions of Czech Republic from 2006 to 2012","authors":"E. T. Quartey, P. Lesáková, I. Obršálová","doi":"10.37394/232022.2021.1.5","DOIUrl":"https://doi.org/10.37394/232022.2021.1.5","url":null,"abstract":"This paper presents a systematic method for calculating regional level Environmental sustainability by using the sustainable value approach. The quest for achieving sustainability has led to the development of various tools and measures for structuring and conducting sustainable development policy analyses and the metrics used for the measurement of sustainability are still evolving. Sustainable Value approach is another simple tool for measuring sustainability performance. In general, Sustainable Value integrates the three dimensions of sustainability: the economic development, environmental sustainability and social development. This paper uses the principles of the sustainable value approach to calculate the environmental sustainability of the regions of the Czech Republic.","PeriodicalId":443735,"journal":{"name":"DESIGN, CONSTRUCTION, MAINTENANCE","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121123794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-08DOI: 10.37394/232022.2021.1.4
C. Dinh, Kwang-Υong Kim
This paper presents a parametric study of stator air injection on aerodynamic performances of a single-stage transonic axial compressor, NASA Stage 37, using three-dimensional Reynolds-averaged Navier- Stokes equations with the k-ε turbulence model and scalable wall functions. The curvature, location and width of the stator injector and the mass flow rate of air injection were tested to find their effects on the aerodynamic performances, such as total pressure ratio, peak adiabatic efficiency, stall margin and stable range extension. The numerical results for adiabatic efficiency and total pressure ratio were validated with experimental data for smooth casing. The results of parametric study show that the aerodynamic performances of the single-stage transonic axial compressor improve greatly the peak adiabatic efficiency compared to the compressor with smooth casing.
{"title":"Effects of Air Injection on Aerodynamic Performance of a Single-Stage Transonic Axial Compressor","authors":"C. Dinh, Kwang-Υong Kim","doi":"10.37394/232022.2021.1.4","DOIUrl":"https://doi.org/10.37394/232022.2021.1.4","url":null,"abstract":"This paper presents a parametric study of stator air injection on aerodynamic performances of a single-stage transonic axial compressor, NASA Stage 37, using three-dimensional Reynolds-averaged Navier- Stokes equations with the k-ε turbulence model and scalable wall functions. The curvature, location and width of the stator injector and the mass flow rate of air injection were tested to find their effects on the aerodynamic performances, such as total pressure ratio, peak adiabatic efficiency, stall margin and stable range extension. The numerical results for adiabatic efficiency and total pressure ratio were validated with experimental data for smooth casing. The results of parametric study show that the aerodynamic performances of the single-stage transonic axial compressor improve greatly the peak adiabatic efficiency compared to the compressor with smooth casing.","PeriodicalId":443735,"journal":{"name":"DESIGN, CONSTRUCTION, MAINTENANCE","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121516121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-02-06DOI: 10.37394/232022.2021.1.3
J. Rajamäki
We present a hands-free kinetic control method for flying of micro air vehicles (MAVs) or small unmanned aerial vehicles (UAVs) for public protection and disaster relief (PPDR). The system combines a 3D depth-sensing camera with a low-cost drone. The solution is based on Delicode Ltd’s NI mateTM software toolkit. In a study with 10 participants, the kinetic control method was tested and compared with the drone’s normal control mode. The speed to fly a certain path inside a building, and the path accuracy at checkpoints were compared between these two modes. The learning rate with the kinetic control method was found to be better than by normal control. After five attempts, an overall flying speed and path accuracy were still weaker by kinetic control method than by conventional hands-on method. However, hands-free control gives several significant benefits for PPDR applications.
{"title":"Kinetic Controlled Flying of Micro Air Vehicles (MAV) for Public Protection and Disaster Relief (PPDR)","authors":"J. Rajamäki","doi":"10.37394/232022.2021.1.3","DOIUrl":"https://doi.org/10.37394/232022.2021.1.3","url":null,"abstract":"We present a hands-free kinetic control method for flying of micro air vehicles (MAVs) or small unmanned aerial vehicles (UAVs) for public protection and disaster relief (PPDR). The system combines a 3D depth-sensing camera with a low-cost drone. The solution is based on Delicode Ltd’s NI mateTM software toolkit. In a study with 10 participants, the kinetic control method was tested and compared with the drone’s normal control mode. The speed to fly a certain path inside a building, and the path accuracy at checkpoints were compared between these two modes. The learning rate with the kinetic control method was found to be better than by normal control. After five attempts, an overall flying speed and path accuracy were still weaker by kinetic control method than by conventional hands-on method. However, hands-free control gives several significant benefits for PPDR applications.","PeriodicalId":443735,"journal":{"name":"DESIGN, CONSTRUCTION, MAINTENANCE","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131554157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-02-13DOI: 10.37394/232022.2021.1.7
P. Dondon, R. Sauvage, C. Bulucea
Within the framework of sustainable development, a small scale genuine materials house (1/20 scale) and surroundings has been designed. The realisation itself has already been described in a previous paper [1]. Due to the modular structure of the design, different types of measurements ate possible, like in a real house for education purposes. In this paper, a study of thermal behaviour of the small scale house is presented. Steady state and transient behaviours with different double wall insulation are compared using temperature sensors and infrared thermal imaging. Results are discussed. As these results are positive, this 1/20 model kit will be used as an educational tool for practical work in the near future.
{"title":"Enhancing Knowledge on Energy Saving and Insulation Efficiency in Buildings, by Analysing Thermal Behaviour of a Realistic Small Scale House","authors":"P. Dondon, R. Sauvage, C. Bulucea","doi":"10.37394/232022.2021.1.7","DOIUrl":"https://doi.org/10.37394/232022.2021.1.7","url":null,"abstract":"Within the framework of sustainable development, a small scale genuine materials house (1/20 scale) and surroundings has been designed. The realisation itself has already been described in a previous paper [1]. Due to the modular structure of the design, different types of measurements ate possible, like in a real house for education purposes. In this paper, a study of thermal behaviour of the small scale house is presented. Steady state and transient behaviours with different double wall insulation are compared using temperature sensors and infrared thermal imaging. Results are discussed. As these results are positive, this 1/20 model kit will be used as an educational tool for practical work in the near future.","PeriodicalId":443735,"journal":{"name":"DESIGN, CONSTRUCTION, MAINTENANCE","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130157856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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