Showing 1-25 of 6,196 resultsfor "Index Terms":Displacement Factors
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Landslide Displacement Prediction Based on Variational Mode Decomposition and LSTM
2022 20th International Conference on Optical Communications and Networks (ICOCN)
Year: 2022 | Conference Paper |
Landslide displacement prediction is a challenging task. In this paper, a hybrid model based on Variational Mode Decomposition (VMD) and Long Short-Term Memory neural network (LSTM) is proposed to predict landslide displacement. The VMD method is used to decompose the cumulative displacement data of landslides and the time series of environmental impact factors (reservoir water level, rainfall), a...Show More
An Aluminum-Nitride PMUT with Pre-Concaved Membrane for Large Deformation and High Quality-Factor Performance
2021 21st International Conference on Solid-State Sensors, Actuators and Microsystems (Transducers)
Year: 2021 | Conference Paper |
Cited by: Papers (8)
We proposed a new pre-concave membrane piezoelectric micro-machined ultrasonic transducer (PMUT), which is presented with highest quality factor as 600 in air coupling. Surface micromachining process is used for fabrication and AlN is chosen for piezoelectric material, which makes process compatible with Pre-CMOS fabrication. It has been proved that non-flat piezoelectric membrane has better coupl...Show More
A wedge-type piezoelectric motor that can generate high-speed linear or rotary motion is developed. Such a new type of composite piezoelectric ceramic material is constructed with d33 contributing the longitudinal deformation and d15 contributing the shear deformation. Instead of using two individual ceramics to obtain the desired hybrid motion profile, this new approach has the advantage of only ...Show More
Structural Displacement Measurement with High-speed Vision System and Retro-reflective Markers
Zulhaj Aliansyah;Mingjun Jiang;Kohei Shimasaki;Takeshi Takaki;Idaku Ishii
2019 International Conference on Advanced Mechatronics, Intelligent Manufacture and Industrial Automation (ICAMIMIA)
Year: 2019 | Conference Paper |
This study proposes a vision system for structure dynamics measurement. The system captures lateral and vertical displacements at multiple points on a truss bridge model. Retro-reflective corner cube and coaxial lighting device were used to obtain high-contrast appearance of markers at long-distance measurement. The markers were aligned within the depth of field of the vision system with different...Show More
Simulation model of an input power factor of a single — Phase AC-DC drive
2012 IEEE 4th International Conference on Adaptive Science & Technology (ICAST)
Year: 2012 | Conference Paper |
The re-awakening of the Ajaokuta Steel rolling mills and other industrialized sectors of the Nigerian economy where a large numbers of users of drives exist has influenced this research. It establishes the Input Power factor problem by simulating a DC drive and also provides useful information on the behaviour factors viz; Harmonic factor, Displacement factor and Ripple factors to users who lack k...Show More
On-Site Impact Factor and Dynamic Response Estimation Using Image Processing for Quay Gantry Crane
Ahmed Noshy Mohammed;Ezzeldin Kamel Mohamed;Ayman Hussein Hosny Khalil
2023 2nd International Conference on Smart Cities 4.0
Year: 2023 | Conference Paper |
Quay cranes play a vital role in port operations. The dynamic loads encountered during operation can cause vibrations and impact forces on the crane, increasing the danger of fatigue damage and structural failure. As a result, the accurate estimation of the crane's dynamic response and impact factor is vital and usually beyond specifications. This study proposes a novel approach that uses image pr...Show More
Degradation of Input Displacement Power Factor by Input Current Filter and its Compensation for a Matrix Converter
2018 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES)
Year: 2018 | Conference Paper |
Cited by: Papers (1)
The control of input displacement power factor independent of the load power factor is one of the advantages of a three phase to three phase Matrix Converter. An input current filter is normally used to filter out the unwanted distortion components of the input current drawn from the ac power supply. This input current filter introduces an undesirable leading phase shift in the input current even ...Show More
Ground and Satellite Long-Term Monitoring of Two Slow-Moving Urbanized Earthflows of the Italian Southern Apennines
R. Vassallo;J. De Rosa;C. Di Maio;D. Reale;S. Verde;G. Fornaro
IGARSS 2022 - 2022 IEEE International Geoscience and Remote Sensing Symposium
Year: 2022 | Conference Paper |
Basal and superficial displacements of two landslides in overconsolidated clayey soils are being monitored by inclinometers and GPS since 2005, and in some parts of the slope since the 1990s. The mostly North-South (N-S) orientation of the landslide displacements makes monitoring by satellite interferometry a challenging problem. To solve it, COSMO-SkyMed Differential Interferometric Synthetic Ape...Show More
Prediction of Landslide Displacement Using EMD-PSO-ELM with Multiple Factors
2018 7th International Conference on Digital Home (ICDH)
Year: 2018 | Conference Paper |
Cited by: Papers (1)
This study demonstrates a model for the prediction of active landslide displacement based on the extreme learning machine (ELM) with multiple factors. The particle swarm optimization (PSO) model is selected to optimize the parameters of ELM. Firstly, the landslide displacement sequence which has been monitored is divided into several components developed by the empirical mode decomposition (EMD). ...Show More
Slope Displacement Forecasting of the Substations Based on the Support Vector Machine and Environmental Factor
Lei Lei;Xiaochun Bai;Mengying Hu;Hao Wan;Jiandong Duan;Shaojun Wang;Liang Wang;Chenxi Wang;Jinxiong Yao;Peng Lu
The accurate forecasting of slope displacement is necessary for the safe construction and operation of substations. Through comprehensive analysis of slope displacement effect factors, a slope displacement forecasting method based on support vector machine (SVM) and rainfall is proposed. Firstly, the correlation between slope vertical displacement and rainfall is analyzed. Then, the forecasting mo...Show More
Design and Modeling of Differential Capacitive Hexagonal Beam Based MEMS Accelerometer
2024 Symposium on Design, Test, Integration and Packaging of MEMS/MOEMS (DTIP)
Year: 2024 | Conference Paper |
In this study, we designed a differential capacitive-based MicroElecto-Mechanical System (MEMS) accelerometer with hexagonal suspension springs. We utilized standard silicon-on-insulator (SOI) technology with a 30 $\boldsymbol{\mu}\mathbf{m}$ structural layer thickness. The proposed device was modeled using the MEMS + numerical tool to characterize various performance characteris-tics. The MEMS ac...Show More
Method for Identifying Type of Eddy-Current Displacement Sensor
Mizuno Tsutomu;Goto Sho;Deguchi Kenta;Kitamura Yoshinori;Asato Yuichi;Enoki Shigemi;Shinagawa Hiroki
IEEE Transactions on Magnetics
Cited by: Papers (3)
Eddy-current (EC) displacement sensors are used in a device for measuring the shaft vibration of turbines. An EC displacement sensor is composed of a sensor probe and an impedance/output voltage (Z/V) converter. In a power plant in the U.S., the type of the sensor probe and the displacement x from the turbine shaft to the tip of the sensor probe (displacement x ) are not controlled. For this reaso...Show More
An Integrated 5-DoF Displacement Sensor System of Magnetically Suspended Flywheel
The displacement measurement of the magnetically suspended flywheel (MSFW) on 5 degrees of freedoms (5-DoFs) is critical to the accurate position control of the flywheel (FW) rotor. Therefore, an integrated 5-DoF displacement sensor is designed to measure the dynamic displacements of the MSFW. First, the detection surfaces of the MSFW on 5-DoFs are introduced, and the displacement coordinates are ...Show More
Extending the Linearity Range of Eddy-Current Displacement Sensor With Magnetoplated Wire
Tsutomu Mizuno;Shigemi Enoki;Toshiaki Hayashi;Takashi Asahina;Hiroki Shinagawa
IEEE Transactions on Magnetics
Cited by: Papers (32)
The ratio of the linearity range Lo to the coil diameter D of the ordinary eddy-current (EC) displacement sensor, Lo/D, is approximately 0.48. In conventional technology, the coil diameter needs to be increased to extend the measuring range of the EC displacement sensor. In this paper, we propose the use of magnetoplated wire (MPW) for the coil winding to improve the Lo /D ratio. An MPW is a coppe...Show More
Displacement Estimation Using Multimetric Data Fusion
While displacement is valuable information for the structural behavior, measuring displacements from large civil structures is often challenging and costly. To overcome difficulties found in direct measurements such as using linear variable differential transformer and LASER-based methods, indirect displacement estimation approaches are alternatively developed. Such indirect approaches in general ...Show More
Characterization of Interlayer Sliding Deformation for Individual Multiwalled Carbon Nanotubes Using Electrostatically Actuated Nanotensile Testing Device
Hyun-Jin Oh;Hideaki Omori;Mitsutaka Sadakata;Ikko Tsubokura;Yoshitada Isono
We have developed an in situ scanning electron microscopy (SEM) nanomaterial manipulation system, including a newly designed electrostatically actuated nanotensile testing device (EANAT), in order to investigate the mechanical characteristics of multiwalled carbon nanotubes (MWCNTs) synthesized by atmospheric pressure-chemical vapor deposition. The new EANAT can measure uniaxial tensile displaceme...Show More
Displacement measurements using a self-mixing laser diode under moderate feedback
A semiconductor laser subject to moderate optical feedback has been used to design an interferometric displacement sensor. The autoadaptative signal processing presented in this paper has been computed in order to improve the accuracy of such a sensor. This setup has been successfully tested for both harmonic and aleatory displacements of a remote piezoelectric actuator with a maximum accuracy of ...Show More
Metamaterial Cell Loaded Substrate Integrated Waveguide sensor for Angular Displacement Measurement
2019 8th Asia-Pacific Conference on Antennas and Propagation (APCAP)
Year: 2019 | Conference Paper |
Cited by: Papers (2)
Till now, angular displacement sensors have been realized with microstrip and coplanar waveguide. This work instigate the validity of the same phenomenon with substrate integrated waveguide (SIW). A metamaterial cell (complementary split ring resonator) is loaded over the SIW and rotated at various angles to detect the notch. The CSRR is rotated from 0 to 90° and it is observed that the notch dip ...Show More
Analysys of the influence of turbines blades tips optical properties for the results of the measurements of radial displacement by logo method using a multichannel fiber optical collector
2019 International Conference on Electrotechnical Complexes and Systems (ICOECS)
Year: 2019 | Conference Paper |
Cited by: Papers (1)
Results of experimental researches of measurement of displacement based on logo method using a multichannel fiber optical collector are considered in the article. Revealed the important of research, the description of the manufactured experimental base, the object of research, the technique of execution of experience is presented. The influence of the optical properties of the blades is analyzed, ...Show More
Application of Multivariable Time Series Based on RBF Neural Network in Prediction of Landslide Displacement
2008 The 9th International Conference for Young Computer Scientists
Year: 2008 | Conference Paper |
Cited by: Papers (2)
Landslide is a kind of genetic type of slope and has the same characteristics with slope. The major external motivation factor of landslide displacement is groundwater and it is under the control of remedial measures at the same time after its remediation. Chaotic time series of landslide displacement and its influential factors could reflect the history of landslide displacement of dynamic system...Show More
Analysis of the influence of the level of signal distortion on current error and phase displacement of the inductive current transformers
2012 IEEE International Power Modulator and High Voltage Conference (IPMHVC)
Year: 2012 | Conference Paper |
Cited by: Papers (1)
The aim of the paper is to present results concerning the influence of conductive disturbances on accuracy of transformation of distorted signal main harmonic through the inductive current transformers (CTs). Analysis of the results from the laboratory studies shows, that conductive disturbances in the CT primary current, in some measuring conditions, cause decrease of the accuracy of transformati...Show More
Application of discrete element method in stability analysis for rock slope based on strength reduction
2010 IEEE 17Th International Conference on Industrial Engineering and Engineering Management
Year: 2010 | Conference Paper |
Cited by: Papers (1)
Discrete element method is a numerical methods using for non-continuous media, which is suitable for high rock slope stability analysis with developed rock fault, joints and cracks. Strength reduction is a numerical methods, widely using in the slope stability analysis, it maintained that the strength reserve coefficient and the stable safety factor proposed by the limit equilibrium is equivalent....Show More
Anchor loss limited Q factor analysis of disk resonator at UHF using various materials
2017 International Conference on Circuit ,Power and Computing Technologies (ICCPCT)
Year: 2017 | Conference Paper |
Surface micromachined resonators and filters are attractive for various RF applications. In this paper the Quality factor (Q) of RF MEMS disk resonators using various materials at UHF frequencies is analyzed. It is found that disk resonators Q factor increases with decrease in the energy density of the material while keeping all other geometries constant. As the Q factor increases, the Sensitivity...Show More
Performance analysis of an open ended coaxial resonator based displacement sensor
The 8th European Conference on Antennas and Propagation (EuCAP 2014)
Year: 2014 | Conference Paper |
Cited by: Papers (9)
In this paper, an open ended coaxial resonator based displacement sensor is presented. The developed device is capable of determining the xy-plane displacement in a contactless way. The sensor system is constructed from a dielectric wedge, a coaxial resonator, as well as two ISM band Radio modules. The resonance frequency and quality factor of the cavity change when the dielectric target moves wit...Show More
Design of Miniaturized Sensing Unit for Underground Displacement 3-D Measurement Sensor
Nanying Shentu;Wenhao Tang;Qing Li;Guohua Qiu;Xianyang Zhang;Yubin Yang
Existing underground displacement monitoring sensors require prior drilling, but the size of borehole will affect the workload of drilling. Meanwhile, the landslide monitoring site is often in the field where the traffic is inconvenient and vehicles cannot be directly reached, miniaturization can reduce the weight and volume of the sensor, making transportation and handling even more convenient. T...Show More
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