Scientific Technical Review最新文献_第2页

Load of remote controlled battle station upper carriage with integrated automatic grenade launcher 集成自动榴弹发射器的遥控战斗站上部车厢负载

Scientific Technical Review Pub Date : 2022-01-01 DOI: 10.5937/str2202027i

Milan Ivković, V. Milovanović, B. Nedić, S. Đurić

引用次数: 0

Powerplant cooling flight tests 动力装置冷却飞行试验

Scientific Technical Review Pub Date : 2022-01-01 DOI: 10.5937/str2202014o

Marina Ostojić, Tamara Nikolić, Nikola Bogavac

引用次数: 0

Active disturbance rejection control of unmanned tracked vehicle 无人履带车辆自抗扰控制

Scientific Technical Review Pub Date : 2022-01-01 DOI: 10.5937/str2202050b

G. Banjac, M. Stankovic, Stojadin M. Manojlovic

{"title":"Active disturbance rejection control of unmanned tracked vehicle","authors":"G. Banjac, M. Stankovic, Stojadin M. Manojlovic","doi":"10.5937/str2202050b","DOIUrl":"https://doi.org/10.5937/str2202050b","url":null,"abstract":"Significant improvement of the unmanned vehicles possibility has achieved by increasing its autonomy, i.e. by excluding the human operator from the guidance loop. In this paper is considered the autonomous control of the unmanned tracked vehicle (UTV) in the presence of the unknown caterpillar tracks slippage. The longitudinal and lateral control model for the UTV path following problem are developed. To handle unknown uncertainties and slippage disturbances, the design of active disturbance rejection control (ADRC) for both, longitudinal and lateral control channels, are proposed. ADRC strategy is enabled that all the control channel uncertainties and disturbances are treated as one lumped (total) disturbance, which is defined as an extended system state and estimated by appropriate extended state observer (ESO). Further, applying the appropriate closed-loop control laws, based on the total disturbance estimation, the complex longitudinal and lateral control problems are reduced to disturbance-free model control. The numerical simulations for the different path following scenarios and caterpillar tracks slippage dynamics are given to verify effectiveness of the proposed UTV control.","PeriodicalId":33842,"journal":{"name":"Scientific Technical Review","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71086195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Air and precipitation testing as part of environmental radiation monitoring in the vicinity of nuclear facilities 作为核设施附近环境辐射监测一部分的空气和降水试验

Scientific Technical Review Pub Date : 2022-01-01 DOI: 10.5937/str202061k

J. Knezevic, N. Lazarevic, S. Forkapić, Kristina Bikit-Šreder, Vesna Radumilo, D. Arbutina

引用次数: 0

Lead compensator design for DC motor driven electromechanical fin actuator 直流电机驱动机电鳍形执行器的引线补偿器设计

Scientific Technical Review Pub Date : 2022-01-01 DOI: 10.5937/str2202044a

Pavle Adamović, Zlatko Petronijević, N. Jovicic, Aleksandar Z. Stefanović, M. Pavić

引用次数: 0

Development of a new CNC grinding machine for 3+2-axis grinding of the profile rotary milling cutter 研制了一种新型数控磨床，可用于3+2轴型回转铣刀的磨削

Scientific Technical Review Pub Date : 2022-01-01 DOI: 10.5937/str2201042m

M. Milutinović, Z. Dimić, G. Vasilić, S. Zivanovic, B. Kokotović, Nikola Slavković

{"title":"Development of a new CNC grinding machine for 3+2-axis grinding of the profile rotary milling cutter","authors":"M. Milutinović, Z. Dimić, G. Vasilić, S. Zivanovic, B. Kokotović, Nikola Slavković","doi":"10.5937/str2201042m","DOIUrl":"https://doi.org/10.5937/str2201042m","url":null,"abstract":"Due to the great expansion of woodworking, profile tools manufacturing has become current and in demand. In wood industry there are two large groups of tools: rotary and spindle milling cutters that can be profile or flat. The technology of making profile rotary milling cutters requires, apart from cutting, turning, milling, 5-axis grinding operation that is performed on a 5-axis CNC grinding machine with the A'OXYZC configuration.It is a machine of a very complex kinematics and high cost-price. The paper presents a new machine that has been built for 3+2-axis grinding - Profilator 100,used for industrial manufacturing of rotary and spindle profile milling cutters. The accuracy of measures and shapes of the profile cutters built on Profilator 100 is of a high level and in industrial exploitation the difference is not observed between the profile cutters built on 5-axis CNC grinding machines. Regarding technoeconomic cost-effectiveness, production costs of Profilator 100 are lower even by ten times compared to the cost-price of 5-axis CNC grinding machines of renowned world manufacturers such as Schneeberger and Volmer.","PeriodicalId":33842,"journal":{"name":"Scientific Technical Review","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71086350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fire-resistant composites based on acrylic-functionalized lignin and polyester resin obtained from waste poly(ethylene terephthalate) 废聚对苯二甲酸乙酯中丙烯酸功能化木质素与聚酯树脂的耐火复合材料

Scientific Technical Review Pub Date : 2022-01-01 DOI: 10.5937/str2202032k

N. Knežević, Aleksandar Jovanović, J. Bošnjaković, Milena Milošević, M. Rančić, A. Marinković, Jelena D. Gržetić, Houda Gamoudi

{"title":"Fire-resistant composites based on acrylic-functionalized lignin and polyester resin obtained from waste poly(ethylene terephthalate)","authors":"N. Knežević, Aleksandar Jovanović, J. Bošnjaković, Milena Milošević, M. Rančić, A. Marinković, Jelena D. Gržetić, Houda Gamoudi","doi":"10.5937/str2202032k","DOIUrl":"https://doi.org/10.5937/str2202032k","url":null,"abstract":"This paper investigates the using potential of acryl-functionalized kraft lignin (AKL) in reducing the flammability of polymer composites based on recycled unsaturated polyester resins (UPR). Acryl functionalization of kraft lignin was performed by direct esterification of free polyphenolic groups with acryloyl chloride, after what, the AKL was blended in UPR resin synthesized from the polyols obtained by catalytic depolymerization of waste poly(ethylene terephthalate). The AKL was homogenized in UPR resin in different weight ratios: 2.5, 5.0, 7.5, and 12.5 wt.%. Structural and dynamic-mechanical characteristics of acryl-functionalized kraft lignin and composites were determined using FTIR spectroscopy, dynamicmechanical analysis (DMA), and tensile tests. The influence of functionalization and mass fraction of AKL on tensile and thermal properties of UPR resin was studied. The thermal properties of the composite were tested according to the standard UL-94 method, based on which the highest category of heat-resistant materials is a composite with 12.5 wt.% acylfunctionalized lignin.","PeriodicalId":33842,"journal":{"name":"Scientific Technical Review","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71086312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hybrid filament wound composite tubes (aramide fiber/glass fiber)-epoxy resins and (carbon fibers/glass fiber)-epoxy resins: Volumetric, mechanical and hydraulic characteristics 混合长丝缠绕复合管(芳纶纤维/玻璃纤维)-环氧树脂和(碳纤维/玻璃纤维)-环氧树脂:体积、机械和水力特性

Scientific Technical Review Pub Date : 2022-01-01 DOI: 10.5937/str2201033r

J. Radulovic

{"title":"Hybrid filament wound composite tubes (aramide fiber/glass fiber)-epoxy resins and (carbon fibers/glass fiber)-epoxy resins: Volumetric, mechanical and hydraulic characteristics","authors":"J. Radulovic","doi":"10.5937/str2201033r","DOIUrl":"https://doi.org/10.5937/str2201033r","url":null,"abstract":"In this paper volumetric, mechanical and hydraulic characteristics of filament wound composite one fiber tubes and hybrid tubes are presented. Composite hybrid materials, produced by filament winding technology, are categorized according to different ways of classification of hybrid materials. Four fibrous reinforcement agents (glass G600, polyamide aromatic K49, carbon T300 and carbon T800) and two impregnation agent systems (epoxy 0164 and epoxy L20) are used for manufacturing of filament wound tubes. Density, tensile strength, specific tensile strength, hydraulic burst pressure and specific hydraulic burst pressure of two filament wound glass fiber/epoxy resins tubes (as starting materials) and of twelve filament wound hybrid tubes are investigated. Four highest values of tensile strength and hydraulic burst pressure are of the next schedule: hybrid tubes mark G600-T800/L20 (the highest), hybrid tubes mark G600-T800/0164, hybrid tubes mark G600-T300/L20 and hybrid tubes mark G600-K49/L20. Also, a row of four highest specific tensile strength and highest specific hydraulic burst pressure begins with hybrid tubes mark G600-T800/L20, but the schedule of the next three tubes is different due to density of aramide composite materials (hybrid tubes mark G600-K49/L20, hybrid tubes mark G600-T800/0164 and hybrid tubes mark G600-K49/0164). All filament wound tubes (single fiber tubes and hybrid tubes) with epoxy L20 have a slightly lower density value but higher values of tensile strength, specific tensile strength, hydraulic burst pressure and specific hydraulic burst pressure than appropriate tubes impregnated with epoxy 0164. Obtained results in this testing indicate and emphasize the importance of advanced reinforcing agents (aramide roving and carbon fibers), of impregnating agents (epoxy resin systems) and of the density of hybrid tubes, especially with aramide roving.","PeriodicalId":33842,"journal":{"name":"Scientific Technical Review","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71085741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparative analysis of volumetric and instrumental method for determination of nitroglycerin content in gunpowder 容量法和仪器法测定火药中硝酸甘油含量的比较分析

Scientific Technical Review Pub Date : 2021-01-01 DOI: 10.5937/str2102041r

Magdalena Rakić, Mirjan Krstovic, Slavko Mijatov, M. Dimić, Bojana Z. Fidanovski

引用次数: 0

Wind tunnel verification of base-bleed effects on aerodynamic characteristics of an axi-symmetric projectile 底流对轴对称弹丸气动特性影响的风洞验证

Scientific Technical Review Pub Date : 2021-01-01 DOI: 10.5937/str2102019d

Dijana Damljanović, Goran Ocokoljić, M. Lisov, Danilo Đurđevac

引用次数: 0