Articole din publicaţii internaţionale: Recent submissions

  • Some aspects regarding the elaboration of multiple precessional gear theory and modern manufacturing technology 
    BOSTAN, Ion; DULGHERU, Valeriu ("Dunărea de Jos" University, Galaţi, 2006)
    The engineering complex study of the triad “gear-technology-transmission” has permitted to elaborate a new type of precessional transmissions with multicouple gear. In this paper, the authors present the mathematic model ...
  • Sea Waves Energy 
    BOSTAN, Ion; GHEORGHE, Adrian; DULGHERU, Valeriu; SOBOR, Ion; BOSTAN, Viorel; SOCHIREAN, Anatolie (Springer Nature Switzerland, 2013)
    The largest energy reserves are stored in the oceans – a large area of water currents continuously moving and covering about 71% of the planet’s surface. The Planet Ocean has a huge energy potential that can be employed ...
  • Safety aspects of kinematic planetary precessional transmissions with plastic wheels 
    BOSTAN, Ion; DULGHERU, Valeriu; BODNARIUC, Ion ("Dunărea de Jos" University, Galaţi, 2012)
    The planetary precessional transmissions represent a new principle type of the mechanical transmissions. The specificity of the relative sphere-spatial movement of the precessional gearing elements makes the sliding friction ...
  • RENAM - collaborative e-infrastructure for research and education in Moldova 
    BOSTAN, Ion; SECRIERU, Grigore; TIGHINEANU, Ion; BOGATENCOV, Petru (IEEE, 2014)
    Development of National research and educational networking infrastructure and services is the basis of modern eInfrastructure components operation. The paper describes current state, development prospects of scientific ...
  • Power losses estimation in precessional gear 
    BOSTAN, Ion; DULGHERU, Valeriu; BODNARIUC, Ion (ICTCM – CITAf - OID.ICM, 2007)
    The planetary precessional transmissions represent a new principled type of the mechanical transmission. The specific of the relative sphere-spatial movement of the precessional gearing elements makes the sliding friction ...
  • Planetary Precessional Transmissions: Synthesis and Generation Technologies 
    BOSTAN, I. (Springer Nature Switzerland, 2013)
    Some problems of mechanical transmissions can be solved with special effects by developing new types of transmissions based on planetary precessional transmissions with multiple gear, that were developed by the author. ...
  • Permanent Magnet Generators (PMG) for Wind Turbines and Micro Hydro Turbines 
    BOSTAN, Ion; GHEORGHE, Adrian; DULGHERU, Valeriu; SOBOR, Ion; BOSTAN, Viorel; SOCHIREAN, Anatolie (Springer Nature Switzerland, 2013)
    There are essential differences in the design of systems for water/air flow kinetic energy conversion into mechanical energy. First of all, speeds of rotation of the turbine rotors are different: the speed of those which ...
  • Nonstandard teeth profile description and justification of precessional gear parameters selection 
    BOSTAN, I.; DULGHERU, V. (IOP Publishing, 2019)
    Teeth profiles have an important role in the efficient transformation of motion in the precessional transmissions. Multiple precessional gear theory, previously developed, did not take into consideration the influence of ...
  • Modelling and simulation of the fluid flow action on rotor blades of the micro-hydropower station 
    BOSTAN, Ion; DULGHERU, Valeriu; BOSTAN, Viorel (Latvia University of Life Sciences and Technologies, 2007)
    Micro-hydropower station provides kinetic energy conversion of river water into mechanical or electrical energy without building barrages. Increased efficiency is provided by blades aerodynamic profile and their optimum ...
  • Micro-hydropower station for kinetic energy conversion of flowing whater 
    BOSTAN, Ion; DULGHERU, Valeriu; BOSTAN, Viorel; SOCHIREANU, Anatol; CIOBANU, Oleg; CIOBANU, Radu (Institutul de Cercetari pentru Hidraulica si Pneumatica, Bucureşti, 2012)
    An efficient conversion of kinetic energy of river water into mechanical or electrical energy without building barrages is provided by micro-hydropower stations. Increased efficiency is achieved by an optimum position of ...
  • Mechatronics between dream and actual reality 
    IONESCU, Florin; BOSTAN, Ion; DULGHERU, Valeriu; AROTĂRIŢEI, Dragoş; CONSTANTIN, George; KOSTADINOV, Kostadin; STRATULAT, Florin (University "Politehnica" of Bucharest, 2010)
    The paper presents some achievements in complex modelling and simulation in mechatronics, being underlined some characteristics of the mechatronics field together with applications of the mechatronics design principles. ...
  • Mathematical modeling of the multipair convex-concave teeth contact in precessional gearing 
    BOSTAN, Viorel; BOSTAN, Ion; VACULENCO, Maxim (Universitatea de Stat din Tiraspol, 2020)
    The paper addresses the problems of creating toothed gears ADCX-CV for 2K – H precessional transmissions, with convex-concave contact KCX-CV with the small difference in the curves of the flanks of the multiple pair ...
  • Kinetostatic analysis and optimization of planetary precessional transmissions 
    BOSTAN, Ion; DULGHERU, Valeriu; SOCHIREAN, Anatolie (Technical University of Cluj-Napoca, 2013)
    The paper presents the CAD (Autodesk Inventor) modeling and CAE simulation of precessional drives capable of high transmission ratio and torque for one stage compact construction. The simulations of the drives provide ...
  • Integrated CAE development of precessional drives using autodesk inventor platform 
    BOSTAN, Ion; IONESCU, Florin; DULGHERU, Valeriu; CONSTANTIN, George; SOCHIREAN, Anatolie (Editura Academiei Române, 2006)
    The paper presents the modeling and simulation of precessional drives designed in two variants capable of high transmission ratio and torque for one stage compact construction. The constructions were designed in Inventor ...
  • Helical Turbine for Aeolian Systems and Micro-Hydrostation 
    BOSTAN, I.; DULGHERU, V.; CIUPERCĂ, R. (Springer Nature Switzerland, 2004)
    According to the wind cadastre existing in the Republic of Moldova and the development priorities of the wind energy conversion systems, which recommend the development of small power electric-energetic plants (approximately ...
  • Generation of the teeth precessional gears by plastic deformation 
    BOSTAN, I.; DULGHERU, V.; TRIFAN, N. (IOP Publishing, 2018)
    The paper presents a method for obtaining the teeth of the precessional gear by plastic deformation. There are analyzed the basic problems that must be resolved to apply this process: determination of dimensions of initial ...
  • Elaboration of nonconventional technological methods and equipment for precessional gears manufacturing by means of plastic molding 
    BOSTAN, Ion; DULGHERU, Valeriu; BODNARIUC, Ion (Politehnica Publishing House, 2018)
    The planetary precessional transmissions represent a new principled type of the mechanical transmission. Precessional planetary transmission has a number of advantages: increased bearing capacity, high mechanical efficiency, ...
  • Elaboration and research of planetary precessional multiplier type K-H-V 
    BOSTAN, I.; DULGHERU, V.; CIOBANU, R. (IOP Publishing, 2016)
    The multiplier is an indispensable part of the micro hydropower plant and high power wind turbine. It helps to increase rotor low speeds limited by the water flow small velocity and by the relative big placement diameter ...
  • Development of Planetary Precessional Transmission with Multicouple Gear 
    BOSTAN, Ion; DULGHERU, Valeriu (Springer Nature Switzerland, 2013)
    Some problems of mechanical transmissions can be solved with special effects by developing new types of transmissions based on planetary precessional transmissions with multiple gear, that were developed by the authors. ...
  • Cinetostatic analysis of planetary precessional multiplier 
    BOSTAN, I.; DULGHERU, V.; CIOBANU, R. (IOP Publishing, 2019)
    The majority planetary precessional transmissions diagrams developed previously operate efficiently in reducer’s regime. Teeth profiles have an important role in the efficient transformation of motion in the precessional ...

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