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Development of a Multivariate Quality Estimator for an Industrial Fractionator in the Presence of Cross-correlation of Output Variables

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IFAC-PapersOnLine 2023年第2期56卷 7160-7165页

作者： Andrei Torgashov Oleg Snegirev Vladimir Klimchenko Fan Yang Institute of Automation and Control Processes FEB RAS 5 Radio Str. Vladivostok Russia Beijing National Research Center for Information Science and Technology and Department of Automation Tsinghua University Beijing 100084 P.R. China

The paper deals with the problem of developing a multivariate quality estimator (soft sensor) for an industrial fractionator. In contrast to the known approaches, it is proposed to use a multivariate filter to predict the errors, which are then taken into account as corrections in the final predictions of mutually correlated outputs. The superiority of a soft sensor with the multivariate filter design over conventional soft sensors developed sequentially without taking into account the cross-correlation of the outputs is reported based on the industrial fractionator case study.

关键词： process modeling and identification soft sensing distillation columns cross-correlation multivariate filter

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Single and double In atomic layers grown on top of a single atomic NiSi2 layer on Si(111)

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Physical Review B 2022年第3期106卷 035415-035415页

作者： L. V. Bondarenko A. Y. Tupchaya Y. E. Vekovshinin D. V. Gruznev A. N. Mihalyuk N. V. Denisov A. V. Matetskiy A. V. Zotov A. A. Saranin Institute of Automation and Control Processes FEB RAS Vladivostok 690041 Russian Federation Institute of High Technologies and Advanced Materials Far Eastern Federal University 690950 Vladivostok Russia

Atomic sandwiches consisting of In layers with coverages ranging from ∼0.5 to ∼2.5 monolayers atop a single-atomic-layer NiSi2 have been grown on Si(111) and have been explored using a set of experimental techniques, i.e., scanning tunneling microscopy, angle-resolved photoelectron spectroscopy, and in situ low-temperature transport measurements, accompanied by the density functional theory calculations. It has been found that each of the three In phases forming on the NiSi2/Si(111) substrate has its definite counterpart among the In phases forming on the bare Si(111) surface. Structural, electronic, and transport properties of the single- and double-atomic In layers have been elucidated in detail.

关键词： Electrical conductivity First-principles calculations Structural properties Superconductors Surface & interfacial phenomena Surface reconstruction Surface states 2-dimensional systems Surfaces Two-dimensional electron system Evaporation Photoemission spectroscopy Resistivity measurements Scanning tunneling microscopy

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Thickness Dependence of Magnetic and Magnetotransport Properties of Textured Fe3o4 Ferrimagnetic Films on Sio2/N-Si(001)

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SSRN 2023年

作者： Balashev, Vyacheslav V. Ermakov, Konstantin S. Tsukanov, Dmitry A. Samardak, A.Yu. Ognev, Alexey V. Samardak, Alexander S. Laboratory of Spin-Orbitronics Institute of High Technologies and Advanced Materials Far Eastern Federal University Vladivostok Russia Institute of Automation and Control Processes FEB RAS Vladivostok Russia

The efficient injection of spin-polarized charge carriers from a ferro- or ferrimagnet into a semiconductor is an urgent problem. Half-metal magnetite (Fe3O4) is an attractive candidate for the role of a spin injector in spintronic devices. Here, the influence of the thickness of magnetite films on their electrical, magnetic, and magnetotransport properties is presented. Polycrystalline magnetite films with (311)-texture and thickness ranging from 15 to 250 nm are grown on the oxidized silicon surface by reactive iron deposition in the molecular oxygen atmosphere. It is found that the saturation magnetization nonmonotonically increases with the film thickness and reaches its maximum value at 170 nm. From an analysis of the evolution of the coercive force with thickness, it is found that the surface roughness of the film decreases with thickness and stops changing at a thickness of more than 100 nm. It is shown that for films with a thickness of more than 150 nm there is a rapid decrease in resistivity by almost 3 times. The magnetoresistance value reaches -2.5% already at a thickness of 50 nm and remains almost unchanged with a subsequent increase in the thickness of the textured film. Since, at a small thickness, textured films have higher magnitudes of conductivity and magnetization than conventional polycrystalline films, the textured-F3O4/SiO2/Si-junction with amorphous SiO2 barrier is promising for Si-based spintronic devices. © 2023, The Authors. All rights reserved.

关键词： Surface roughness

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Development of a Method for Generating Extremely High Reference Motion Speeds of Mechatronic Objects Moving Alone or in a Group

Development of a Method for Generating Extremely High Refere...

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International Russian Smart Industry Conference (SmartIndustryCon)

作者： Anton Gubankov Igor Gornostaev Robotics Laboratory Institute of Automation and Control Processes FEB RAS Laboratory of Marine Unmanned Aviation and Marine Aviation Systems Admiral G.I. Nevelskoy Maritime State University Vladivostok Russia Laboratory of Robotic Systems M.D. Ageev Institute of Marine Technology Problems FEB RAS

The paper presents the results of developing a method for generating reference control signals that describe the desired law of movement of various mechatronic objects (unmanned aerial vehicles, mobile land and underwater robots, etc.) along smooth trajectories specified by parametric splines. In order to maintain high dynamic accuracy of control of these mechatronic objects, including when solving group control problems, it is proposed to adjust their reference movement speed, taking into account the specified restrictions on the developed accelerations. Taking into account these restrictions is necessary to reduce the reference speed in sections of the trajectory with increased curvature. To implement the proposed approach, a method was developed and a system was synthesized, the performance of which was confirmed by the results of numerical simulation. The presented system is designed to operate in conditions where the reference trajectory of a mechatronic object is unknown in advance and is formed (or adjusted) directly during the mission without the possibility of preliminary calculations. Also, this system does not require complex calculations and can be implemented on the basis of low-power on-board computers.

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The method for estimating the maximum velocity of the AUV motion with trajectories re-planning according to their dynamic properties

The method for estimating the maximum velocity of the AUV mo...

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2021 International Conference on Automatics and Energy, ICAE 2021

作者： Yukhimets, D.A. Karmanova, S.V. Laboratory of Robotic Systems Institute of Automation and Control Processes FEB RAS 5 Radio St. Vladivostok690041 Russia Laboratory of Intelligent Control Systems Institute of Marine Technology Problems FEB RAS 5 A Sukhanov St. Vladivostok690091 Russia

The paper considers the problem of adjusting the value of a predetermined velocity required for horizontal motion of autonomous underwater vehicles (AUVs) in an environment containing obstacles, when trajectories change in order to avoid obstacles. Therewith, the velocity estimation generated during the re-planning of the AUVs motion trajectories is the maximum possible and is carried out on the basis of the AUVs dynamics model, considering their dynamic limitations and changes in the parameters of the motion trajectories. The topicality of the task is determined by the need to improve the efficiency of underwater missions in various areas of human activity (environmental monitoring, laying and maintenance of underwater communications, etc.). It depends on the mode of the AUVs motion: their velocity and parameters of the trajectories. The simulation results confirm the efficiency of the proposed method for estimating the maximum possible velocity of the AUVs motion. © 2021 institute of Physics Publishing. All rights reserved.

关键词： Autonomous underwater vehicles

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Method of formation of reference control signals for redundant manipulators

Method of formation of reference control signals for redunda...

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2021 International Conference on Automatics and Energy, ICAE 2021

作者： Filaretov, V.F. Gubankov, A.S. Gornostaev, I.V. Far Eastern Federal University Department of Automation and Robotics Vladivostok690091 Russia Institute of Automation and Control Processes FEB RAS Robotics Laboratory Vladivostok690041 Russia Institute of Marine Technology Problems FEB RAS Laboratory of Robotic Systems Vladivostok690091 Russia

The paper is devoted to preservation of dynamic control accuracy of working tools of multilink manipulators when they move along arbitrary spatial trajectories, taking into account the design limits in all degrees of freedom and special cases of position of their links. Preservation of control accuracy is proposed to be ensured by eliminating reach of all degrees of freedom of the manipulators to the limits and to indicated special positions, characterized by ambiguity in solving the inverse kinematic problems of the manipulators, as well as excluding the reach of their working tools to boundaries of working area due to use of a redundant degree of freedom when approaching indicated undesirable positions. The performed simulation has confirmed efficiency of the proposed method. © 2021 institute of Physics Publishing. All rights reserved.

关键词： Degrees of freedom (mechanics)

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Calculation of Compositional Maps of Sea Surface Temperature from IR Measurements of US Satellites

Calculation of Compositional Maps of Sea Surface Temperature...

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Ocean Studies (ICOS), International Conference on

作者： Marina Aleksanina Sergey Dyakov Anastasia Ershova Satellite Monitoring Laboratory of IACP FEB RAS Institute of Automation and Control Processes Far Eastern Branch of the Russian Academy of Sciences Vladivostok Russia Institute of Mathematics and Computer Technologies Far Eastern Federal University Vladivostok Russia

ISBN: (数字)9798331532307

ISBN: (纸本)9798331532314

The work is devoted to approbation of a methodology for constructing and verifying composite maps of sea surface temperature (SST) with the preservation of thermal fronts. The equatorial part of the Northwestern Pacific Ocean region, characterized by weak temperature contrasts, significant clouds and high concentrations of water vapor, was chosen as the area for testing. Satellite and sub-satellite measurements were extracted from international databases. It is shown that the use of map provided by international databases based on a single satellite session requires additional cloud filtering. The developed composite maps are compared with their analogues. The advantage of the proposed approach is shown. A comparison of the temperatures of composite one-day maps and buoy measurements shows the accuracy of calculations within 0.6°C. The linear relationship has a slope coefficient close to one and a free term that does not exceed the accuracy of calculations.

关键词： Temperature measurement Temperature sensors Satellites Accuracy Filtering Databases Clouds Sea measurements Sea surface temperature Testing

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Alloying with Ga Promotes Superconductivity in Single-Atomic Pb Layer on Si(111)

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SSRN 2023年

作者： Bondarenko, Leonid V. Tupchaya, Alexandra Y. Vekovshinin, Yury E. Gruznev, Dimitry V. Kotlyar, V.G. Utas, Tatyana V. Mihalyuk, Alexey N. Denisov, N.V. Zotov, Andrey V. Saranin, A.A. Institute of Automation and Control Processes FEB RAS 5 Radio Street Vladivostok690041 Russia Institute of High Technologies and Advanced Materials Far Eastern Federal University Vladivostok690950 Russia

Alloying of the single-atom-thick Pb film on Si(111), the so-called striped incommensurate SIC-√3×√3-Pb phase, with Ga has been found to result in the formation of the ordered 2D layer having the √43×√43 periodicity. In situ transport measurements have shown that the layer is superconductor with the critical temperature Tc = 2.48 K, which sufficiently exceeds the critical temperatures of the SIC-√3×√3-Pb phase and bulk Ga. This finding opens the new ways to control low-dimensional superconductivity at the atomic scale limit through alloying appropriate species and get a success even when it does not take place in the case of the same bulk materials. © 2023, The Authors. All rights reserved.

关键词： Alloying

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The System of Coordinated Operation of Two Underwater Vehicles in a Complex Environment

The System of Coordinated Operation of Two Underwater Vehicl...

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Ocean Studies (ICOS), International Conference on

作者： Vladimir Filaretov Alexey Katsurin Laboratory of Robotic Systems Laboratory of Automation and Robotics Institute of Automation and Control Processes FEB RAS Vladivostok State University Vladivostok Russia Department of Automation and Robotics Laboratory of Intelligent Information Systems for Marine Robots Far Eastern Federal University M.D. Ageev Institute for Marine Technology Problems FEB RAS Vladivostok Russia

The paper discusses methods of coordinated operation of two autonomous underwater vehicles, one of which is equipped with a multi-link manipulator and a vision system, and the second - auxiliary - only a vision system. These methods ensure the joint operation of two autonomous underwater vehicles both in the mode of semi-automatic positional remote control, and in the mode of automatic execution of operations with various objects. At the same time, work is considered in situations when the vision system of the main underwater vehicle does not allow observing the object of work, which is nevertheless located in the working area of the manipulator. In this case, the auxiliary inspection underwater vehicle with its own vision system is used to monitor the object. In the semi-automatic remote control mode, the manipulator automatically takes into account the current spatial orientation of the optical axis of the vision system of the inspection underwater vehicle, as well as the spatial orientations of both underwater vehicles at yaw angles in the absolute coordinate system. And in automatic mode, an accurate transfer of the spatial location and orientation of the object, which are determined using the vision system of the inspection underwater vehicle, is additionally provided to the associated coordinate system of the main underwater vehicle. It is possible to identify and eliminate errors that occur during the operation of the vision system and navigation systems of both underwater vehicles. The results of experimental studies have confirmed the operability of the proposed methods.

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Effect of Embedded Cr on the Structural Phase Transition of In/Si(111)4×1

SSRN

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SSRN 2023年

作者： Bondarenko, Leonid V. Tupchaya, Alexandra Y. Vekovshinin, Yury E. Gruznev, Dimitry V. Olyanich, Dmitry A. Utas, Tatyana V. Mihalyuk, Alexey N. Zotov, Andrey V. Saranin, A.A. Institute of Automation and Control Processes FEB RAS 5 Radio Street Vladivostok690041 Russia Institute of High Technologies and Advanced Materials Far Eastern Federal University Vladivostok690950 Russia

Using scanning tunneling microscopy and low-energy electron diffraction observations accompanied with the density-functional theory calculations, adsorption of Cr atoms onto the Si(111)4×1-In surface and its effect on the 4×1-to-8×2 structural transition were investigated. It was found that in contrast to other metal adsorbates, such as Na, In and Pb, which remain adatoms, Cr atom becomes embedded below the level of In atoms constituting the In nanowire. But in other respects Cr produces effects similar to those of other metals, namely it also induces distortion in the In rows of its residence resulting in doubling of the periodicity along the rows and also reduces the critical temperature of the 4×1-to-8×2 transition almost linearly with amount of deposited metal. © 2023, The Authors. All rights reserved.

关键词： Scanning tunneling microscopy

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