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Multiple orbital angular momentum generated by dielectric hybrid phase element

AIP Conference Proceedings 2017年第1期1874卷

作者： Xuewen Wang Aleksandr Kuchmizhak Dejiao Hu Xiangping Li 1Centre for Micro-Photonics Swinburne University of Technology Hawthorn VIC 3122 Australia 2School of Natural Sciences Far Eastern Federal University (FEFU) 8 Sukhanova Str. Vladivostok 690041 Russia 3Institute of Automation and Control Process of FEB RAS 5 Radio Str. 690041 Vladivostok Russia 4Institute of Photonics Technology Jinan University Guangzhou 510632 China

Vortex beam carrying multiple orbital angular momentum provides a new degree of freedom to manipulate light leading to the various exciting applications as trapping, quantum optics, information multiplexing, etc. Helical wavefront can be generated either via the geometric or the dynamic phase arising from a space-variant birefringence (q-plate) or from phase accumulation through propagation (spiral-phase-plate), respectively. Using fast direct laser writing technique we fabricate and characterize novel hybrid q-plate generating vortex beam simultaneously carrying two different high-order topological charges, which arise from the spin-orbital conversion and the azimuthal height variation of the recorded structures. We approve the versatile concept to generate multiple-OAM vortex beams combining the spin-orbital interaction and the phase accumulation in a single micro-scale device, a hybrid dielectric phase plate.

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The navigation method of wheeled mobile robot based on data fusion obtained from onboard sensors and camera

The navigation method of wheeled mobile robot based on data ...

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International Conference on control, automation and Systems ( ICCAS)

作者： Aleksandr Novitsky Dmirty Yukhimets Institute of Automation and Control Processes FEB RAS Vladivostok Russia Far Eastern Federal University Vladivostok Russia

In this paper, we propose a method for constructing a mobile robot navigation system based on data fusion obtained from on-board sensors and cameras using an extended Kalman filter. Moreover, the video device we use is a low cos web-camera, that leads to whole system price reduction. The approach can significantly improve the accuracy of mobile robot navigation where global positioning systems are not available. The method proposed consists of two stages. In the first stage video processing and providing additional information about mobile robot movement occurs. A second stage is the fusion of the navigation data obtained from the video stream and the data received from the onboard sensors of the mobile robot. The experimental study of the proposed approach proved its higher accuracy and efficiency comparing with methods based on onboard sensors or mobile robot video camera only.

关键词： Robot sensing systems Mobile communication Radio navigation Electromagnetics Mobile robots

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On numerical model of time-dependent processes in three-dimensional porous heat-releasing objects

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AIP Conference Proceedings 2016年第1期1770卷

作者： Nickolay A. Lutsenko 1Institute of Automation and Control Processes FEB RAS Vladivostok Russia 2Far Eastern Federal University Vladivostok Russia

The gas flows in the gravity field through porous objects with heat-releasing sources are investigated when the self-regulation of the flow rate of the gas passing through the porous object takes place. Such objects can appear after various natural or man-made disasters (like the exploded unit of the Chernobyl NPP). The mathematical model and the original numerical method, based on a combination of explicit and implicit finite difference schemes, are developed for investigating the time-dependent processes in 3D porous energy-releasing objects. The advantage of the numerical model is its ability to describe unsteady processes under both natural convection and forced filtration. The gas cooling of 3D porous objects with different distribution of heat sources is studied using computational experiment.

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Development of synthesis method of fault tolerant systems for autonomous underwater robots with navigation sensors failures

Development of synthesis method of fault tolerant systems fo...

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Mediterranean Conference on control and automation (MED)

作者： V.F. Filaretov A.V. Zuev A.N. Zhirabok A.A. Procenko B. Subudhi Far Eastern Federal University and Institute of Automation and Control Processes FEB RAS Vladivostok Russia Institute of Automation and Control Processes FEB RAS Vladivostok Russia Far Eastern Federal University Vladivistok Russia National Institute of Technology Rourkela Rourkela city Odisha India

The development of a synthesis method of highquality fault tolerant systems for autonomous underwater robots with navigation sensors failures is addressed in this paper. The offered new method bases on using of kinematic models of these robots and a special fusion of data obtained from their onboard navigation sensors. The advantage of method is simplicity of realization and high precision of compensation of detected faults in the conditions of uncertainty and essential variability of parameters of environment and underwater robot. The results of modeling confirm high efficiency of functioning of the synthesized fault tolerant systems.

关键词： Observers Navigation Sensor systems Mathematical model Fault tolerant systems

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Development and experimental research of adaptive control system for robotic complex

Development and experimental research of adaptive control sy...

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International Conference on control, automation and Systems ( ICCAS)

作者： Igor Gornostaev Vladimir Filaretov Anton Gubankov Department of Automation and Control Far Eastern Federal University Vladivostok Russia Robotics Lab Institute of Automation and Conrtol Processes FEB RAS Vladivostok Russia

The paper deals with adaptive control system for robotic complex. This system depending on current values of continuously varying parameters of control objects can support the maximum possible speed of the working tools and accessory equipment without reducing a given dynamic accuracy. During performance of various technological operations there are situations when mass-inertial characteristics (parameters) of the objects and modes of their movements vary within wide limits. As a result, when the load on the actuators of manipulators is reduced it becomes possible to increase the speed of their work without worsening of dynamic precision of control. In this work the method of synthesis of adaptive control systems that provide continuous tuning of the frequency of the oscillating motion of the manipulator working tool depending on the amplitude of the next movement and moment of inertia of the control object is proposed. This tuning is provided using the amplitude-frequency characteristics of the actuator of the manipulator. Performed experimental studies have confirmed the high efficiency of the proposed methods.

关键词： Belts Robots Adaptive systems Tuning Regulators

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The method of cutting of flexible parts using manipulators and information multiplexing from 3D vision system and CAD model

The method of cutting of flexible parts using manipulators a...

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International Conference on Computer, control, Informatics and Its Applications (IC3INA)

作者： V. Filaretov D. Yukhimets A. Zuev A. Gubankov E. Mursalimov Department of Automatization and Control Far Eastern Federal Universaity Vladivostok Russia Robotics Laboratory Institute of Automation and Control Processes FEB RAS Vladivostok Russia

This paper presents new method of cutting of flexible parts with arbitrary geometrical form. Proposed method is based on four principles: 1) simple and rapid fixation of any flexible parts with the help of universal devices with possible deformation of its geometric forms; 2) scanning of the deformed parts by means of 3D vision system; 3) multiplexing of priori known CAD model of parts with the model, received by scanning; 4) automatic generation of new motion trajectory of manipulator's working tool. For realization of this method an algorithm of multiplexing of two models and transferring of cutting path from the CAD model to deformed model is developed. Conducted mathematical simulation showed that proposed algorithm provides the accurate path planning of manipulator's working tool at deformation of parts and hence to provide the quality cutting.

关键词： Solid modeling Deformable models Mathematical model Design automation Multiplexing Three-dimensional displays Computational modeling

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The Universal Onboard Information-control System for Mobile Robots

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Procedia Engineering 2015年 100卷 737-745页

作者： Vladimir Filaretov Dmitry Yukhimets Eduard Mursalimov Far Eastern Federal University 8 Sukhanova str.Vladivostok Russia Institute of Automation and Control Processes FEB RAS 5 Radio str.Vladivostok Russia

The approach to creation of universal software platform for realization of information-control system of mobile robot is proposed in this work. The main feature of this platform is universal structure of software components which consist of functional part and communication part. This structure allows provide the independence of functional part from hardware of mobile robot. The minimal set of software components which allows create the core of information-control system of mobile robot is proposed. Also the algorithms realizing of functions of these components are described.

关键词： mobile robot control system software architecture data fusion trajectory forming

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Stress-induced indirect to direct band gap transition in β-FeSi2 nanocrystals embedded in Si

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AIP Conference Proceedings 2017年第1期1874卷

作者： A. V. Shevlyagin D. L. Goroshko E. A. Chusovitin S. A. Balagan S. A. Dotsenko K. N. Galkin N. G. Galkin T. S. Shamirzaev A. K. Gutakovskii M. Iinuma Y. Terai 1Institute of Automation and Control Processes FEB RAS Radio St. 5 Vladivostok Russia 2Far Eastern Federal University School of Natural Sciences Sukhanova St. 8 Vladivostok Russia 3Rzhanov Institute of Semiconductor Physics SB RAS Lavrentieva Ave.13 Novosibirsk Russia 4Ural Federal University Mira St. 19 Yekaterinburg Russia 5Novosibirsk State University Pirogova St. 2 630090 Novosibirsk Russia 6Department of Computer Science and Electronics Kyushu Institute of Technology Iizuka Fukuoka 820-8502 Japan

Embedded in silicon β-FeSi2 nanocrystals (NCs) were grown on Si(111) by solid phase epitaxy of a thin iron film followed by Si molecular beam epitaxy. After solid phase epitaxy, a mixture of β-FeSi2 and ε-FeSi nanocrystals is formed on the surface, sometimes β and ε phases coexist inside one nanocrystal. During initial stage of Si molecular beam epitaxy all ε-FeSi transforms into β-FeSi2. β-FeSi2 nanocrystals tend to move following Si growth front. By adjusting growth condition, we manage to prevent the nanocrystals from moving and to fabricate 7-layer n-Si(111)/β-FeSi2_NCs/p+-Si silicon heterostructure with embedded β-FeSi2 NCs. An epitaxial relationship and a stress induced in the nanocrystals by silicon matrix were found to be suitable for indirect to direct band gap transition in β-FeSi2. Of the heterostructure, a n-i-p avalanche photodetector and a light-emitting diode were formed. They have shown relatively good performance: ultrabroadband photoresponse from the visible (400 nm) to short-wavelength infrared (1800 nm) ranges owing to quantum-confined Stark effect in the nanocrystals and optical emission power of up to 25 µW at 9 A/cm2 with an external quantum efficiency of 0.009% at room temperature owing to a direct fundamental transition in stressed β-FeSi2 nanocrystals.

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MEMS-based wavelength and orbital angular momentum demultiplexer for on-chip applications

MEMS-based wavelength and orbital angular momentum demultipl...

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Conference on Lasers and Electro-Optics Europe

作者： Vladimir S. Lyubopytov Alexey P. Porfirev Stanislav O. Gurbatov Sujoy Paul Martin F. Schumann Julijan Cesar Mohammadreza Malekizandi Mohammad T. Haidar Martin Wegener Arkadi Chipouline Franko Kuppers Institute for Microwave Engineering and Photonics Technische Universität Darmstadt Merckstr. 25 64283 Darmstadt Germany Department of Photonics Engineering Technical University of Denmark (DTU) Ørsteds Plads 343 2800 Kgs. Lyngby Denmark Samara National Research University Moskovskoye shosse 34 Samara 443086 Russia Image Processing Systems Institute - Branch of the Federal Scientific Research Centre “Crystallography and Photonics” of Russian Academy of Sciences Molodogvardejskaya St. 151 Samara 443001 Russia Far Eastern Federal University 8 Sukhanova Str. Vladivostok 690041 Russia Institute of Automation and Control Processes Far Eastern Branch of the Russian Academy of Sciences (IACP FEB RAS) Radio Str. 5 Vladivostok 690041 Russia Institute of Nanotechnology Karlsruhe Institute of Technology (KIT) 76021 Karlsruhe Germany Institute of Applied Physics Karlsruhe Institute of Technology (KIT) 76128 Karlsruhe Germany

ISBN: (纸本)9781509067374

We demonstrate a new tunable MEMS-based WDM&OAM Fabry-Perot filter for simultaneous wavelength (WDM) and Orbital Angular Momentum (OAM) (de)multiplexing. The WDM&OAM filter is suitable for dense on-chip integration and dedicated for the next generation of optical interconnects utilizing all three degrees of freedom of the electromagnetic waves: wavelength, polarization, and OAM. The WDM&OAM filter consists of two Distributed Bragg Reflectors (DBRs), (see Fig. 1a,b): a bottom one fixed to the substrate and a movable top MEMS DBR. An applied tuning current, changing the resonator length, extends the top DBR and hence selects the central filter wavelength. A spiral phase mask on the top switches the OAM order by ±1, ±2, etc. For a detailed description of the structure and fabrication of the device, please refer to [1,2]. The MEMS filter shows a full-width at half-maximum (FWHM) bandwidth of about 0.2 nm and a free spectral range (FSR) of about 126 nm. The phase mask provides sufficient OAM state purity in a 35 nm window around 1550 nm, covering well the whole C-band.

关键词： Bragg reflectors Distributed Bragg reflectors Optical angular momentum Optical interconnects Phase modulation Spiral phase

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The Automatization Method of Processing of Flexible Parts without their Rigid Fixation

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Procedia Engineering 2015年 100卷 4-13页

作者： Vladimir Filaretov Alexander Zuev Dmitry Yukhimets Anton Gubankov Eduard Mursalimov Institute for Automation and Control Processes FEB RAS 5 Radio St. Vladivostok 690041 Russia Far Eastern Federal University 8 Suhanova St. Vladivostok 690950 Russia

This paper presents a new advanced approach for automatization of processing of flexible parts with arbitrary geometrical forms. This approach based on using multilink manipulators with vision system and allows to exclude the individual equipment for rigid fixing of processed parts. This is achieved by formation and correction of program motions of cutting tool of manipulator using information about current position of processed parts from 3D vision system.

关键词： Manipulatos flexible items motion paths vision systems CAD model

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