bluuebunny/crossref_metadata_2025 huggingface dataset:
Improving the сontrol efficiency of metallurgical silicon production technology
Authors: Martynov S A , Bazhin V Yu
Published: December 2019

The production of metallurgical silicon is characterized by the use of stationary units as ore-thermal furnaces. Such furnaces’ operational difficulties are associated primarily with a low level of automated control and management. The present article is concerned with the features of the modern technological process for metallurgical silicon production. The following issue of concern in the production chain as the lack of moisture control of the reducing agent was identified. A method that implies a comprehensive approach to control both technological and energy parameters, in particular humidity, ash content and particle size distribution of the reducing agent is proposed as a recommendation. An algorithm for the operation of an automatic control system with the introduction of additional functions that improves the efficiency of the furnace unit has been developed and justified.
Automation engineering of adaptive industrial warehouse
Authors: Pilipenko O V , Provotorova E N , Sergeev S M , Rodionov O V
Published: December 2019

The modern automatic warehouse of industrial production is equipped with sensors to determine the type, size, weight, expire date of each SKU. There are also robots for moving SKUs, control algorithms, and an interface for interacting with external services. When developing such a cyber physical system, it is necessary to optimize its main parameters. In engineering, only 2-3% of the whole time is spent on the processing of parts. The substantial time is spent on interoperational storage and transportation. The productivity of the automatic warehouse determines the economic performance of the enterprise as a whole. In addition, the assortment and emergent stock of products stored in the warehouse should ensure stable work under conditions of a change in the production program. This paper is devoted to the algorithm that underlies the digital interaction of an automatic warehouse as a cyber-physical system.
Management of the bus fleet structure in modern conditions
Authors: Afanasyev Alexander S , Terentyeva Valeria A , Tarasov Ivan V
Published: December 2019

The full disclosure of the potential capabilities of buses requires an assessment of the effectiveness of their operation for a number of relevant requirements. The modern regulatory and technical framework for the operation of buses provides high requirements in accordance with environmental and safety standards throughout the life cycle. Therefore, today, the bus fleet structure management system should consider indicators of the quality of their operation, as well as the design stage, in the process of operation and subsequent disposal. Accordingly, the properties of the bus, which are part of the quality, should be practically implemented (correlated) in accordance with the variable parameters of the operating environment over the entire life cycle. At present, taking into account the technical and operational indicators of buses, it is averaged to change the individual groups of indicators of quality, as for an individual object, and for their totality in the structure of the park. The fundamental difference between the developed hierarchy of goals and the subsystems of the control structure system of a bus is to take the level of traditional complex quality criteria into account - to ensure reliability, such as environmental and structural safety and the ability to implement an environmentally sound business environment.
Method and tool for assessing the residual life of the planetary electric actuator of the exoskelet
Authors: Egorov A V , Belogusev V N , Kozlov K E , Lysyannikov A V , Kaizer Yu F , Lysyannikova N N , Tyukanov V L , Kuznetsov A V
Published: December 2019

This article proposes a method and tool for assessing the quality of assembly and technical condition of the electric drive of the exoskeleton, on the basis of its moment of starting as one of the main indicators of the level of degradation of its components. The existing methods are based on the determination of the moment of starting with the help of additional devices that require the participation of the operator in the measurement process, which increases its time and labor costs and makes it difficult to automate. In contrast to the existing methods and tools, the proposed in this article method and hardware-software complex, allow you to automate the measurement process, do not require expensive equipment and can perform monitoring of the technical condition without dismantling the drive from the exoskeleton. In the experimental part of this article, the proposed method and tool were evaluated on the basis of electric drives with reducers for Electromechanical orthosis of the lower limb exoskeleton. In the course of experimental studies, for the first time, the dependences of the residual life and the efficiency of the electric drive on the moment of moving the input shaft of the gearbox were determined. The results obtained allow us to conditionally determine the level of resource development and the efficiency of the electric drive, based on the measurement of its starting moment, which allows us to carry out maintenance of gearboxes and electric drives according to their actual condition, adjust their maintenance schedule and replacement time, and also increases the reliability of the product in use.
Dissipative structures in thin films of cavitation-activated soot suspensions
Authors: Stebeleva O P , Kashkina L V , Petrakovskaya E A , Nikitin S L , Dobrosmyslov S S , Rublev G V
Published: December 2019

This paper presents analysis of optical images of films obtained by evaporation (293 K) of a thin layer of low-concentrated (1% wt.) aqueous soot suspensions in a Petri dish. Suspensions of wood, fullerene and diamond-containing (after detonation synthesis) soot were prepared using hydrodynamic dispersion in a cavitation mixer with a wedge-shaped cavitator with the rotor’s angular velocity of rotation being 10000 rpm. The components of the hydrodynamic dispersion process are turbulent micro-mixing and bubble cavitation. As a result of intense turbulence, carbon suspensions assumed properties of non-equilibrium systems. The images of an optical microscope revealed self-organized dissipative micron-sized structures in the dried films being present there in the form of chain, branched and ring-shaped cluster fractals of various dimensions that look very similar to nanotubes. The self-assembling effect was identified for all the types of suspensions under study. The EPR method was used to study the change in the electronic structure of soot resulting from the exposure to high temperatures and pressures that occur when the cavitation bubbles collapse (cavitational activation). The dynamics of changes in dissipative structures in the process of film drying was monitored.
Analysis of the current state of the issue of automation of boiler plants in the Chechen Republic
Authors: Gazieva I I , Biysultanova M A , Vizirova H R , Daudov I M
Published: December 2019

This article discusses the practical state of the issue of automation of boiler plants in the Chechen Republic. The authors analyzed the foreign experience of implementation and transition to automatic regulation of industrial facilities. The advantages and uniqueness of the systems used are outlined. The basic requirements for boiler house automation include safe operation and rational regulation of gas flow. In the used automated systems, important indicators are the following: their self-control, the ability to signal during an emergency shutdown of a boiler room or one of the boilers and to fix automatically the factors that caused an emergency shutdown.
Options for organizing own sources of energy supply at the facilities of generating companies based on steam screw machines
Authors: Balzamov D S , Akhmetova I G , Balzamova E Yu , Oykina G I , Bronsrkaya V V
Published: December 2019

Reducing the energy consumption for the own needs of energy sources is an urgent task that can be solved by organizing our own energy sources by using the potential energy of water vapor in steam screw machines. The article discusses some options for installing steam screw machines at the facilities of generating companies and identifies factors affecting the return on steam screw machines in the current operating conditions.
Conditions of occurrence of ice formations and dense snow on the road surface
Authors: Lysyannikov A V , Egorov A V , Lysyannikova N N , Kovaleva M A , Shram V G , Lynev A S , Selihova S G , Kaizer U F
Published: December 2019

The article presents the types of possible snow and ice deposits on the road surface, the conditions of their occurrence, physical and mechanical properties and the duration of their formation. The conditions of snow transfer and possible conditions for the occurrence of snowfall and the process of its formation are analyzed. Information about the frequency distribution of snow in Russia is provided and the analysis of the dependence of the number of snowfalls on air temperature is performed. Data analysis was performed on the thickness of a possible compacted snow layer on the road surface, on the number of cases of ground icing on road and airfield surfaces depending on temperature and air humidity.
Supercritical fluid mediums for the extraction of oil products from tar sands
Authors: Gumerov F M , Khairutdinov V F , Zaripov Z I , Gabitov F R , Mazanov S V , Kurdyuko A I , Gabitova A R
Published: December 2019

The prospects of using supercritical fluid medium for the extraction of oil products from tar sands are discussed. The results of an experimental study of the extraction process using propane-butane extractant (75% wt. propane + 25% wt. butane) in liquid (t = 80 °C, 100 °C, P = 5-10 MPa) and supercritical fluid (t = 140 °C, P = 5-10 MPa) states are presented. The results of quantum chemical simulation are presented in relation to the above process.
Using of Hamilton mechanics methods for modeling dynamic processes on the Earth surface
Authors: Dorrer Georgy
Published: December 2019

This paper presents the methods of mathematical modeling and managing on some dangerous dynamic processes on the Earth surface such as floods, wildfires, desertification, oil spills on the water surface and others. We call these processes by a common name - distribution processes. The Hamilton mechanics methods permit to describe uniformly wide class of dynamic processes - both the processes of control determined with the ordinary differential equations and the processes in the continuous beds. The basic model of the distributed processes was presented in form of Hamilton – Jacoby equation. The concept of the normal speed of the process front movement suggested. The indicatrix and figurotrise of spread, which determine the configuration of the distribution process, are introduced. A model of processes with dissipation is proposed. Classification of processes according to the degree of their mobility is given. Using the figurotrises a new approach to numerical modeling of the processes front propagation based on Godunov’s method of the movable grids proposed. Its essence is that the calculated grid is not given a priory, but it is determined by current solution of the problem. It moves and develops with the solution. The movable grid method can serve as a basis for creating agent models of propagation processes. A separate section of the paper is devoted to describing a method for managing the processes. In particular, the fundamentals of the so-called localization control, which consists in building an obstacle insurmountable for the process, are outlined. The proposed methods and algorithms are illustrated by numerical examples. The models presented in this paper was a theoretical basis for designing and developing some management systems of the distribution processes control.
Chemical nickel plating on a SiO2 film of the silicon betavoltaic converter active window
Authors: Saikova S V , Evsevskaya N P , Lelekov A T , Kovalev I V , Zelenkov P V , Brezitskaya V V
Published: December 2019

In this work, nickel thin films were deposited on silicon and silicon dioxide by chemical deposition for creation a nickel-63 isotope beta radiation source on the active window of a silicon betavoltaic converter. The effects the samples pre-treatment and the process parameters on the nickel deposits quality were investigated. The practical recommendations for implementation of nickel plating and reuse of processed electrolytes are given.
Digital model for assessing strength of busbars and busbar supports located in a switchgear under the influence of electrodynamic force
Authors: Korzhov A V , Cherniavsky A O , Dziuba M A , Putenikhin D V , Kamynin A I
Published: December 2019

Short circuit current impact tests of busbar arrangements in switchgears are very expensive. There are publicized studies that propose the assessment of the impact using simple geometric constructions, but that approach fails to deliver good results. In this article, we propose a finite element method for analysis of mechanical movements in the context of short circuit current impact over the sinusoidal current period. The proposed method allows us to research different designs of switchgears without conducting full-scale tests. We can determine the parts of the model that will shift into unacceptable positions under the influence of short circuit current and promptly make changes to the model.
Intelligent systems for decision making during operation of technological oil and gas equipment
Authors: Zhukov V G , Bukhtoyarov V V , Bashmur K A , Tynchenko V S , Bukhtoyarova N A , Kukartsev V V
Published: December 2019

The problem of intellectualization of decision support during the operation of oil and gas well equipment is considered in the paper. It is proposed to implement an intelligent approach in the form of a multicomponent information system. Combining the subsystems of such an information system requires detailed study to integrate modern methods and algorithms for intelligent data processing. Based on the results of testing the methods on data sets from real operating field objects, data were obtained that testify to the possibility of using the considered approaches and the relatively high efficiency of the artificial neural network method and collective intelligent approach.
Analytical approach in determination of the surface layer parameters of machine parts hardened by a moving elastic indenter
Authors: Abulkhanov Stanislav , Khaimovich Alexander , Polyanskov Yuriy , Bobrovskij Sergej , Lukyanov Aleksey , Levitskih Olesja , Kuznetsova Olga
Published: December 2019

The reducing of machine time during surface hardening by smoothening is possible by increasing in the contact length between the hardening element and part surface. We study the case: the indenter-working surface is a fragment of a cylindrical surface, which the symmetry axis is parallel to the axis of symmetry of the part hardened surface. We suggest that such a process scheme is corresponds to a 2D contact problem in which a cylindrical stamp moves in an inertial coordinate system along an elastic half-plane (circle). We tasking the boundary conditions in the contact zone, using the complex potentials developed in the works of L.N. Galin.
Vertical Self-Defined Thin-Film Thermoelectric Thermocouples by Angled Co-Evaporation for Use in μTEGs
Authors: Yuan Y , Najafi K
Published: December 2019

This paper reports the development of a novel thin-film thermocouple structure and associated thermoelectric films for use in micro-thermoelectric generators. The proposed structure enables thermocouple length to be independent of film thickness in vertical thin-film μTEGs, allowing greater thermal resistances with thin-film designs while maintaining fill factor. In the presented structure, thermoelectric thin-films are evaporated over the sidewalls of high aspect-ratio columns. Thermocouple length is thus set by the height of the columns rather than the thickness of the deposited film. The process takes advantage of the shadowing of these columns to form N & P thermocouples on the left and right side of the columns. Also reported is development of thermally co-evaporated thin films Bi2Te3/Sb2Te3 onto vertical surfaces for use. Integration into proof of concept design TEG structure is briefly detailed.
Design and implementation of a soil profile probe powered by air and soil temperature differences
Authors: Ikeda Natsuki , Shigeta Ryo , Shiomi Junichiro , Kawahara Yoshihiro
Published: December 2019

In this paper, we present a novel approach to realizing a battery-free soil pro le probe that uses the temperature difference between the near-surface air and the underground soil as its power source. Temperature changes in the underground soil are slower than that in the near-surface air, and thus a large temperature difference exists between the near-surface air and the underground soil for most of the day. We develop a sensor prototype driven by a thermoelectric generator (TEG) that directly converts this temperature difference into electricity. Simulations are performed using real eld data, and results show that our prototype can harvest an average of several tens to several hundreds of microwatts. Because the typical sensing interval of a soil pro le probe is 1 h, the average power consumption (e.g., for a Texas Instruments CC2650) is about 5 µW, which is much lower than the expected amount of harvested energy. Furthermore, the results of an experimental implementation of the prototype proved that when the temperature difference between the near-surface air and the underground soil is only 3 K, which is much lower than the average temperature difference in an actual eld, the measured output power exceeds 80 µW.
A simple passive 390 mV ac/dc rectifier for energy harvesting applications
Authors: Santiago Rodriguez A , Garraud N , Alabi D , Garraud A , Arnold D P
Published: December 2019

This paper reports a simple, discrete, ac/dc rectifier architecture intended for magnetic energy harvesters that functions with ac input voltages as low as 390 mVpk. The proposed four NMOS rectifier (4NR) employs cross-connected, saturated-load NMOS inverters. The circuit is completely passive, exhibits good low-voltage performance, consists of only four components for small footprint, and requires no additional blocking diode to prevent power flow from the load. At 2 Vpk input, the 4NR exhibits a power efficiency of 93 % and 400 μW of output power. The 4NR is also successfully connected to an off-the-shelf TI BQ25504 dc/dc converter + battery management chip and shown to charge both capacitor and lithium-ion battery energy storage reservoirs.
GLOW-DISCHARGE ION SOURCE FOR ON-CHIP INTEGRATED MINIATURE MEMS MASS SPECTROMETER
Authors: Grzebyk T , Szyszka P , Górecka-Drzazga A , Dziuban J A
Published: December 2019

This work describes a construction, technology, working principle and properties of an ion source dedicated for a miniature MEMS mass spectrometer. It has been examined under what conditions it is possible to ionize gas sample, and to obtain a properly directed ion beam. The influence of such parameters as shapes, dimensions and distances between the electrodes, as well as the value of an applied magnetic and electric field and pressure level on the operation of the instrument have been investigated. The experiment allowed for choosing the optimal parameters, thus it seems that the ion source will fulfil all the requirements necessary for the MEMS mass spectrometer.
Low-cost, monolithically 3D-printed, miniature high-flow rate liquid pump
Authors: Taylor Anthony P , Velásquez–García Luis F
Published: December 2019

We report the design, fabrication, and characterization of the first monolithically 3D-printed, high-flow rate miniature liquid pumps in the literature. Our low-cost, leak-tight, miniature devices are microfabricated using 150 to 300 μm layers in pure Nylon 12 via fused filament fabrication with a multi-step printing process that monolithically creates all key features with <13 μm in-plane misalignment. Each pump has a rigid frame, a 21 mm-diameter, 150 μm-thick membrane connected at its center to a piston with an embedded magnet, a chamber, passive ball valves, and two barbed fluidic connectors. Pump fabrication under 2 hours and costs less than $4.65 (about $0.65 in printable feedstock). Finite element analysis of the actuator predicts a maximum stress of 18.7 MPa @ 2 mm deflection, i.e., about the fatigue limit of Nylon 12 for infinite life (i.e., 19 MPa). A maximum water flow rate of 1.37 ml/min at 15.1 Hz actuation frequency is calculated –comparable to reported values of miniature liquid pumps with up to two orders of magnitude higher actuation frequency.
Immobilization of glucose oxidase enzyme on NiAl-LDHs for application in microfluidic fuel cell and serotonin detection.
Authors: Galindo-de-la-Rosa J. , Araiza-Ramírez M.G. , Hernández-Torres A. , Ledesma-García J. , Arriaga L.G.
Published: December 2019

In this work, an enzymatic glucose oxidase (GOx) electrode immobilized on double layered hydroxides of NiAl (NiAl-LDHs) was developed for the detection of serotonin neurotransmitters that may be present in human blood samples and carry out the glucose oxidation present in this fluid for energy conversion, and can be applied as self-feeding electrodes in Lab-on-a-Chip devices. The self-feeding electrodes based on fuel cells have a very promising future in lab-on-a-chip devices because they do not occupy an external power source, their manufacturing processes are relatively simple and low cost, and can be developed for different applications such as the determination of biomolecules for diagnosis of various diseases.
A Tunable Hybrid SSHI Strategy for Piezoelectric Energy Harvesting with Enhanced Off-resonance Performances
Authors: Morel A , Pillonnet G , Badel A
Published: December 2019

In this paper, we propose a new electrical strategy for piezoelectric energy harvesting: the Tunable Hybrid SSHI. This strategy, inspired from the hybrid SSHI of Lallart et al., combines features of the parallel SSHI with a modified series SSHI. We prove analytically and numerically that with a fine combination of those two strategies, the harvesting bandwidth can be sensibly increased. Associated with a high coupling harvester, it is shown that the harvesting bandwidth is 3 times larger compared to the series and parallel SSHI.
Experiments on a wireless power transfer system for wearable device with sol-gel thin-film PZT
Authors: Truong Binh Duc , Wang Dixiong , Xue Tiancheng , Trolier-McKinstry Susan , Roundy Shad
Published: December 2019

This paper presents experiments on a low-frequency wireless power transfer system (WPTS) using a piezoelectric transducer with a magnet tip mass as a receiver. The thin-film piezoelectric bimorph cantilever is fabricated by sol-gel processing with the aim to miniaturize the system for wearable applications. The device couples an applied electromagnetic field to the mechanical transverse vibration of the beam, which then induces a voltage across a load resistance connected to the electrical ports. This coupled mechanism is therefore referred to as the magneto-mechano-electric (MME) effect. A power of 3.4 μW is generated in a resistance of 200 kΩ at a magnetic flux density of 100.3 μT. The potential of utilizing the same piezoelectric resonator for both energy harvesting and wireless power transmission modes is shown.
Performances of a cm-scale water flow energy harvester in real environment for autonomous flowmeters
Authors: Saoutieff Elise , Gasnier Pierre , Boisseau Sébastien , Ojer-Aranguren Javier , Rodot Isabelle
Published: December 2019

This paper reports the optimization and the characterization of a 4 cm diameter water flow energy harvester inserted in pipes. In this work, a test-bench has been implemented to measure the harvester’s electrical output powers, rotation frequencies and pressure losses. Furthermore, long-term tests have been carried out in a district heating and cooling system (DHCS) in order to validate its operation in a real environment. Output powers up to 490mW @ 9 m3.h−1 are reported with a mean output power of 5mW in real conditions (Montpellier’s DHCS in France). The pressure losses induced by the turbine and the energy extraction remains lower than 50 mbars which is among the lowest in the state of the art.
MEMS Energy Harvesting Based on Uniform-Stress Cantilever with Multilayer PZT Thin Films
Authors: Hirai S. , Kanda K. , Fujita T. , Maenaka K.
Published: December 2019

Multilayered piezoelectric MEMS energy harvesters based on sputtering depositions are designed and fabricated. To obtain high endurance and output power, the unimorph cantilever structure with totally 10 μm-thick multilayered PZT thin films and 80 μm-thick Si elastic layer is designed. In addition, the cantilever is designed to undergo a uniform stress on the PZT. The output power and voltage was 90 μW and 1.0 Vrms under the input acceleration of approximately 1.2 G (=11.76 m/s2) and optimum load resistance.
Triboelectric effect to harness fluid flow energy
Authors: Haque Rubaiyet Iftekharul , Arafat Amr , Briand Danick
Published: December 2019

We are reporting energy scavenging from fluid flows inside tubular structures using triboelectric effects. Two separate designs of triboelectric generators are proposed. A tubular design that uses liquid-solid interaction mechanism for water, and freestanding flapping films design utilizing contact-separation mechanism for wind flow energies conversions. The developed generators exhibit capabilities to produces power from fluid motions through the tube. Osmotic water having conductivity of 2.05±0.05 μS/cm provides higher triboelectric responses in comparison to tap water (conductivity of 322.0±2.0 μS/cm) flow. An average power of 37.4 μW for an osmotic water flow of82.5±0.5 cm3/s was generated for two pairs of triboelectric generators. Under a wind flow of 8.2±0.1 m/s and using three pairs of generators an average power of 144.8 μW was obtained across an optimum load resistance (RL
) of 7.6 MΩ.
Feasibility of a V-Shaped Magnet Rotor to Convert Vibration into Rotation
Authors: Clarkson D.J. , Kurmann L. , Moubarak G.N. , Jia Y.
Published: December 2019

Majority of the reported kinetic energy harvesting mechanisms involve translatory transduction mechanisms, which diverges from the long established rotary design for electromagnetic generators. A rotary design can offer a much smaller magnet-coil air gap and clearance guidance that translatory transducers simply cannot physically attain. Therefore, this research investigates the feasibility of implementing a V-shaped magnet rotor for the purpose of coupling base point excitation into rotation, which can eventually be coupled to a generator motor. It was also previously theorised that the nonlinear magnetic coupling can give rise to broadband nonlinear resonant behaviour. The resultant device aims to enhance the overall power conversion efficiency of the captured vibration energy.
Facile Fabrication of Silicon Micro/nanostructures for Microelectrodes by Silver-assisted Etching Using Nano-sponge as a Template
Authors: Chen Yueqi , Ruan Jian , Huang Jianhai , Qian Linmao , Jiang Shulan
Published: December 2019

With the gradual miniaturization and popularization of energy storage devices, electrode structures that seek better electrochemical performances and electrical properties have drawn attention. This paper reports a facile and cost-effective method for the fabrication of silicon micro/nanostructures for microelectrodes by silver-assisted etching using nano-sponge as a template. The silicon micro/nanostructures fabricated with the nano-sponge as a template exhibit better uniformity and stability compared with those fabricated without templates. And the silicon micro/nanostructures show good electrochemical performances which can be attributed to the good stability and large effective surface area. The proposed method of fabricating silicon micro/nanostructures is promising for large-scale and low-cost manufacturing, and the obtained silicon micro/nanostructures have great potentials to boost the electrochemical performances of micro energy storage devices.
Increased Piezoelectric Coupling Force in Autoparametric Excitation Harvester connecting to Self-powered Series and Parallel Synchronized Switch Harvesting on Inductor (SSHI) Interfaces
Authors: Asanuma H , Komatsuzaki T , Iwata Y
Published: December 2019

We experimentally investigate the relationship between the electromechanical coupling states, and the optimal resistive load, output power, and harvester’s displacement in the high output autoparametric excitation harvester connecting to the self-powered series and parallel synchronized switch harvesting on inductor (SSHI) interfaces. The piezoelectric coupling force increases as the acceleration and the resistive load increases, because the electromechanical coupling states enhances, as well as the piezoelectric voltage increases by the SSHI technique. The increased piezoelectric coupling force suppresses the harvester’s displacement, which leads to the shift in the optimal resistive load and the decrease in the output power. In our autoparametric excitation harvester, the parallel SSHI interface can achieve high output power at low acceleration, while the series SSHI can achieve high output power at high acceleration. The maximum output power of 3.1 mW was obtained at acceleration of 2.4 m/s2 (0.24G) by the series SSHI interface, from the overall harvester’s size 56×56×70 mm3.
Macroscopic Actuation for Deployable Microvalves: Coupling Mechanically While Isolating Thermally
Authors: Kelly C , Xie X , Dodge A , Livermore C
Published: December 2019

This paper presents the design and initial experimental validation of a system that couples macroscale actuations to a micro flow control system via a hydraulic coupler that isolates the actuator from the valve both spatially and thermally. The hydraulic coupling architecture is designed to enable flow control valves at MEMS length scales to employ macroscale actuation for effective valve sealing while still keeping the size of the valve itself much smaller than the size of the actuator. Lumped-element modelling shows that separating the sealing unit from its actuator can significantly increase the thermal isolation of the valve’s sealing unit from the ambient environment. This approach can enable the valve to be heated to minimize internal condensation with a minimum amount of required power. The manufacture of the hydraulic coupler is described, and its output actuation is measured as a function of input actuation. Finally, gas flow is successfully modulated via actuations that are delivered through the hydraulic coupler.
Low-voltage-driven electrostatic microspeakers with potassium-ion-electrets
Authors: Sano C , Menon V , Honma H , Hashiguchi G , Toshiyoshi H
Published: December 2019

Electrostatic microactuators require external DC biasing in order to achieve the widest possible range of displacements for a given AC input. This report proposes a novel microspeaker structure that utilizes a potassium-ion-electret to reduce the need for such DC voltage application. Electrets exhibiting quasi-permanent charges enable large fixed voltages to be integrated directly within the MEMS structure, acting as an ersatz DC bias. Prototype devices were fabricated and characterized to approximate the effects of electret incorporation on the device performance.
Performance of improved upland rice cultivars under farmer’s field condition in Banten province, Indonesia
Authors: Saryoko A , Kusumawati S , Pohan A
Published: December 2019

The use of improved upland rice (Oryza spp.) cultivars would be an alternative approach for improving rice production in Indonesia. The objectives of study were to identify cultivars with high yield potential and to determine its related traits. Five improved upland rice cultivars, namely Inpago 8, Inpago 9, Inpago 10, Inpago 11 and Inpago 12, released in 2011 to 2017 were observed under farmer’s field condition in Lebak district, Banten Province, Indonesia from September 2018 to January 2019. Grain yield, yield components, and biomass production and partitioning were measured at maturity stage. Grain yield of five cultivars showed higher performance than regional average yield performance. Grain yield performance was closely correlated with panicle number per m2. The Inpago 9 and Inpago 12 were greater in grain yield due to greater number of panicle as compared to other cultivars. Superior performance of Inpago 9 and Inpago 12 were also due to greater biomass production and better harvest index (HI). On the other side, smaller value of panicle number per m2 and HI of Inpago 11 resulted in lower performance in grain yield. In conclusion, panicle number, biomass production, and partitioning were some good traits in selecting adaptive cultivars. In addition, cultivars Inpago 9 and Inpago 12 are considerable to be chosen by the farmers in Lebak district, Banten Province to improve upland rice production.
Selecting the design parameters of hydrostatic control system for a long-base truck train
Authors: Abramov A M
Published: December 2019

For the delivery of long and bulky goods today long trailer trucks are used. In order to comply with the regulated maneuverability indicators, the semi-trailer of the truck train must be equipped with swiveling axles and an appropriate control system. Analysis of control systems for long-base truck trains showed that the most common today are hydro-volume control systems. The article describes the hydro volume control system of the pivot axles of the long-base truck train. The kinematic schemes and the description of the method for calculating the design parameters of the hydrostatic control system of a long-base truck are given.
The effect of generating reactive stresses in the spring elements of titanium nickelide
Authors: Belyakov V N
Published: December 2019

The article is devoted to the study of the effect of generation of reactive stresses in tension springs. The studies of the kinetics of generation and relaxation of these stresses in the TiNi alloy are presented. Regularities of the change in reactive stresses during long-term thermal cycling in the range of complete and incomplete MPs are considered. It was established that the level of reactive stresses depends on several factors, such as the degree of pre-deformation, the type of stress state, the stiffness of the opposing system, the strength properties of the alloy.
New way the determination of magnetostrictive parameters composite multiferroics using the magnetoelectric response
Authors: Filippov D A , Laletsin V M , Srinivasan Gopalan , Zhang Jitao , Tikhonov A A , Galichyan T A
Published: December 2019

The new way the determination of the thin films magnetostriction characteristics using the magnetoelectric response of composite multiferroic is supposed. The analytical expression for the magnetostriction coefficient using the field dependency of the magnetoelectric voltage coefficient is obtained. The experimental data for the bulk composite lead zirconate titanate – nickel ferrite is presented. It is shown, that the data, obtained by supposed way, are in good agreement with previous data, obtained by another way.
Analysis of structures of energy conversion complexes of spacecraft power supply systems in development of their digital control systems
Authors: Kabirov V A , Vintonyak N P , Tyunin S S , Borodin D B , Semenov V D , Shinyakov Yu A
Published: December 2019

The paper discusses the principle of construction of automatic control systems for the energy conversion complex of a spacecraft with a digital control system. It is shown that the proposed digital control system is able to solve all the tasks assigned to it. The results are tested on an experimental model.
Creating an algorithm for improving the working surfaces of tools, using computer modeling
Authors: Kruglov A I , Zubarev Y M , Zhelnov D V , Shvetsov I V
Published: December 2019

The issue in question relates to machine building, particularly to machining of metals. We used the approach and software environment allow comparison with other aforementioned approaches and software environments to more accurately simulate the stress state of the material of the tool and, thereby, to increase accuracy of the design parameters of the tool for specific operating conditions. Introduction of automated systems of metals is directly related to the device status monitoring process of metal cutting, work process and increase its efficiency in the conditions of limited use of staff. Tasks of further improvement of machine-building production are inextricably linked with the effective use of technological equipment. Improving the efficiency of CNC machine tools is limited “hard” daemon setting the specified modes of the metals, when not taken into account peculiarities of processing of a concrete detail and lays the modes for the most demanding conditions.
Basic factors of modeling and optimization of technological processes of construction production
Authors: Naumova O S
Published: December 2019

The article analyzes the main goals, objectives, directions of modeling and optimization of technological processes of construction production. The basic tasks and factors of organizational and technological modeling of construction industry, as well as their influence on the change in production volumes, labor productivity growth and the efficiency of construction enterprises have been determined. The main directions of optimization of technological processes of construction production are formulated based on the modernization and development of production and technological capabilities of construction enterprises.
The results of simulation modeling of the operation of the regenerative fifth wheel hitch of a timber trailer
Authors: Nikonov V O , Posmetev V I , Posmetev V V
Published: December 2019

A three-dimensional mathematical model of the movement of a timber hauler with a semi-trailer along an uneven supporting surface and a computer program developed on its basis are presented that made it possible to evaluate the possibility of equipping the fifth-wheel coupling with an energy recovery system in various driving modes and to study the effect of recovery system parameters on its efficiency.
Estimation of energy secrecy of low-frequency satellite communication system with arbitrary number of spatial diversity reception of signals
Authors: Pashintsev V P , Chipiga A F , Kostyuk D V , Mikhajlichenko R M
Published: December 2019

The imitational model for the low-frequency satellite communication system has been developed using Simulink Ver. 8.2 (MATLAB) environment. The imitational modeling has been carried out for the signal reception with carrier frequencies in f0
≈ 0 30 MHz…1 GHz range and with both single antenna (n=1) and diversified (n=2, 4, 8 antennas) signal reception. On this basis, the dependency of energetic concealment coefficient on the carrier frequency selection has been determined. The analysis of the obtained dependencies shows that in the lowered frequency range (f

0
≈ 30 MHz … 100 MHz) it is possible to increase the energetic concealment coefficient by γ
e(2)
≈ 24 dB when using the dual antenna reception system and up to γ
e(8)
≈ 42 dB when the signal is received by 8 antennas.
Model of stress-strain state of wooden rod under eccentric compression and transverse load
Authors: Varenik A S , Varenik K A
Published: December 2019

The analytical model of the stress-strain state of a wooden compressed-bent rod at short-term loading by forces with unequal eccentricities and at presence of transverse loading is offered. In the calculation model the real diagrams of work of wood on compression and stretching are laid. The approximation of the curved compression chart takes into account the elastic-plastic properties of the wood. The method allows to solve the problem of determination of the limiting bearing capacity both by the criterion of buckling and by criteria of durability. The theoretical results are confirmed by experimental data and can be used for practical calculations of compressed-bent elements.
The use of industrial waste and cullet for building foam glass
Authors: Varenik K A , Varenik A S , Kirillov A V , Shuvalov M V
Published: December 2019

There is a huge raw material base for the production of foam glass. The aim of the work was to develop a technology for producing foam glass from cullet and industrial waste. Glass makes about 5% of municipal waste. Calcium carbonate which is the waste of ANP fertilizer production can be used as a foaming agent. The research task was to obtain effective heat-insulating and structural and heat insulating material with the corresponding physical and mechanical characteristics for low-rise and high-rise construction. The analysis of existing approaches to the production of foam glass was carried out in the course of the work, laboratory study of various mixtures composition was held and optimal mixtures of cullet and a foaming agent were proposed. Experiments showed that the density of foam glass made from different kinds of glass differs by up to 15%, which makes it possible to dispense with the expensive operation of sorting cullet.
EEG Signal Radio Frequency Control Wheeled Robot Based on Bi-objective Chaotic Particle Swarm Optimization Algorithm
Authors: Guan Shan , Liu Xingwang
Published: December 2019

Aiming at the EEG signal radio frequency control problem of EEG signal radio control wheeled robot traversing multiple objective points, a new method of EEG signal radio frequency control that integrates the bi-objective chaotic particle swarm optimization (BCPSO) is put forward. This method transforms the selection of objective points into the EEG signal radio frequency control problem and makes optimization by using the ant colony algorithm. The EEG signal control function between the two objective points is defined, and the particle swarm optimization algorithm is applied for optimization. Given the premature phenomenon of particle swarm optimization algorithm, the inverse learning strategy is introduced into the particle swarm optimization algorithm, and the inertia weight and learning factor of the particle swarm optimization algorithm are improved. The performance test results show that the bi-objective chaotic particle swarm optimization algorithm can effectively prevent the premature particle phenomenon and improve the optimization capacity and stability of the particle swarm optimization algorithm.
Research on Interactive System of Science Exhibition Based on Leap Motion
Authors: Zhongliu An , Xin Zou
Published: December 2019

Objective In order to explore the application of non-contact interaction in Science exhibition, an interactive system of science exhibits based on leap motion technology is proposed. Method Based on the Leap motion-based Science exhibition interactive system, the design of a “planetary story” science exhibit with interactive experience is evaluated according to three interactive experience indicators: realism level, learning pressure level and pleasure level. In this way, the feasibility of Leap motion technology in the popular science interactive system is verified. Result The use of the Leap motion gesture interaction library, combined with Unity3D development tools, to design science exhibits. Conclusion By proposing an Science exhibition interactive system based on Leap motion, it provides a design theory for the development of popular science exhibits. At the same time, the combination of Leap motion and popular science exhibits improves the user’s interactive experience and meets users’ interest in popular science content.
Creative Design of Transmission Device for Workpiece Transfer in Production Line
Authors: Ge Rongyu , Xin Miaomiao , Wu Jialiang , Ni Xiaomei
Published: December 2019

It is necessary for the workpiece transfer system in the production line to realize periodic indexing and reciprocating oscillation motion. In view of the complicated structure of the traditional transmission device and the need of multiple driving motors, a creative design integrating the indexing transmission and the oscillating transmission is made based on the globoidal cam mechanism. Taking the material transfer system in the LED beam splitter as a design example, structural design and 3D modeling were carried out, and the 2D drawings were obtained. The virtual prototype of the overall transmission is established by the dynamic simulation software ADAMS and the angular displacement of the three output shafts is simulated. The simulation results verify that the scheme can meet the requirements of the workpiece transfer system.
Thermodynamic Prediction Model of Single-stage Gradational Lead Screw Vacuum Pump
Authors: Zhao Fan , Han Feng , Sun Kun , Zhang Shi-Wei , Yue Tai , Li Jin-Ming
Published: December 2019

As a kind of fluid machinery, screw vacuum pumps are widely used in material engineering and semiconductor industry. Nowadays, new requirements for screw vacuum pumps are put forward on low energy consumption and low manufacture cost. Compared with the constant lead screw (CLS) vacuum pump, the gradational lead screw (GLS) vacuum pump has many advantages. Taking the SGLS vacuum pump as the research object, this paper divides the pumping process into four small stages and proposes a thermodynamic model to analyse the performance. The characteristic curves under diverse operating conditions are drawn and the energy consumptions are illustrated at the end of this paper. The results show that a thermodynamic model can provide a well explanation on the phenomena of pressure pulsation and power consumption, which will help us to understand the outstanding performance of SGLS vacuum pump better.
Tool for Teaching Physical Model Making in Product Design
Authors: Das Supradip , Das Amarendra Kumar
Published: December 2019

As physical prototypes and models can solve many design issues during the New Product Development (NPD) process, it has been introduced as an essential course in many design schools. With the advancement of 3D CAD technologies students find it easier to make digital models, but they find the physical prototyping and model making difficult. This difficulty arises due to lack of understanding of materials, processes and product form correlation required for physical prototyping. In order to address this issue, a tool has been developed and introduced to design students. The tool would guide them to select materials and processes, based on the product form. The tool is a matrix of variables viz. product form, processes and materials. To formulate this matrix, altogether three hundred fifty numbers of products were considered, and clustered them according to their form and processes. On this basis, possible materials have been identified for fitment and suitability of the processes. The tool has been tested with two groups of design students in the course of ‘modelling and simulation’. The effectiveness of the tool has been analysed by conducting an independent t-test and also the Felder-Silverman Index of learning. It has been observed that the tool is highly effective. This paper discusses this effort in details.