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Dynamic Optimization of Guided Missile Trajectory by Use of Matlab and Dynopt Toolbox
Stepan Ozana,Martin Pies,Petr Wagner 제어로봇시스템학회 2012 제어로봇시스템학회 국제학술대회 논문집 Vol.2012 No.10
The paper deals with analysis of case study concerning dynamic optimization problem using Dynopt Toolbox. Particularly it focuses on problem with free time and free end point represented by example of guided missile control in two alternatives. The paper introduces Dynopt as powerful tool for most type of dynamic optimization problem, describing the way how the problem is formulated to be ready for Dynopt syntax.
Design of Deadbeat Controller by Polynomial Approach
Stepan Ozana,Martin Pies,Radovan Hajovsky 제어로봇시스템학회 2012 제어로봇시스템학회 국제학술대회 논문집 Vol.2012 No.10
The paper deals with design of deadbeat controller, particularly with finite time optimal control and quadratic optimal control. It gives a mathematical background for both cases, then it presents case studies with the results and end with the sources codes for Matlab+Polynomial Toolbox.
Design and Implementation of LQR controller for Inverted Pendulum by use of REX Control System
Stepan Ozana,Martin Pies,Zdenek Slanina,Radovan Hajovsky 제어로봇시스템학회 2012 제어로봇시스템학회 국제학술대회 논문집 Vol.2012 No.10
The paper deals with design and implementation of LQR controller for physical model of inverted pendulum. It presents derivation of the full nonlinear mathematical model, its linearization leading to linear state-space description. The mathematical model is then used for design of LQR controller using Matlab. The control scheme is implemented in PAC (programmable automation controller) WinPAC-8000 with the use of REX Control System.
Mini Neutron Monitors at Concordia Research Station, Central Antarctica
Stepan Poluianov,Ilya Usoskin,Alexander Mishev,Harm Moraal,Helena Krüger,Giampietro Casasanta,Rita Traversi,Roberto Udisti 한국우주과학회 2015 Journal of Astronomy and Space Sciences Vol.32 No.4
Two mini neutron monitors are installed at Concordia research station (Dome C, Central Antarctica, 75°06'S, 123°23'E, 3,233 m.a.s.l.). The site has unique properties ideal for cosmic ray measurements, especially for the detection of solar energetic particles: very low cutoff rigidity < 0.01 GV, high elevation and poleward asymptotic acceptance cones pointing to geographical latitudes > 75°S. The instruments consist of a standard neutron monitor and a "bare" (lead-free) neutron monitor. The instrument operation started in mid-January 2015. The barometric correction coefficients were computed for the period from 1 February to 31 July 2015. Several interesting events, including two notable Forbush decreases on 17 March 2015 and 22 June 2015, and a solar particle event of 29 October 2015 were registered. The data sets are available at cosmicrays.oulu.fi and nmdb.eu.
Socio-Economic Aspects of the Impact of Military Actions on the Labor Force
Melnyk, Stepan,Petrukha, Nina,Shuprudko, Nataliia,Ilychok, Bohdan,Balanutsa, Oleksandr International Journal of Computer ScienceNetwork S 2022 International journal of computer science and netw Vol.22 No.7
Ukraine has a significant in quantity and unique in quality parameters, in particular, the level of education, a resource - the labor force, which, along with natural resources, can serve as the basis for economic growth and the achievement of sustainable development goals. The study is aimed at a thorough identification of the main factors influencing the formation and use of the labor force in Ukraine, including by comparing with the indicators of the EU countries, before the start of the active phase of military aggression by the Russian Federation. It was found that until February 24, 2022, there were negative trends in the change in the quantitative and qualitative indicators of the labor force due to the demographic crisis, the transformation of the national economy and shortcomings in state regulation of labor market development processes. The military actions not only exacerbated pre-existing problems, but also led to the emergence of new ones. A significant number of refugees and internally displaced persons, with the termination of the activities of half of the economic entities, provoked a sharp increase in real unemployment and a decrease in wages. The specific problem of the labor market of Ukraine - the "labor crisis", which has and will have a significant impact on the labor force, is carefully considered.
Study and Development of Next-Generation Optical Networks
Taras Maksymyuk,Stepan Dumych,Olena Krasko,Mykola Kaidan,Bohdan Strykhalyuk 한국산학기술학회 2014 SmartCR Vol.4 No.6
Next-generation optical networks are expected to provide tremendous capacity in order to support upcoming traffic increases. Many technologies are currently being developed for optical transport networks in order to increase throughput, improve energy efficiency and simplify network deployment. The most important problem in current optical networks is transmission of Internet protocol (IP) traffic. Regardless of the tremendous throughput with optical fibers, switching nodes still limit overall network performance. Recently, optical burst switching technology has been developed to overcome this problem. Optical burst switching combines the advantages of both circuit switching and packet switching networks and provides good performance in terms of packet data transmission. Even though optical burst switching networks provide a good mechanism for IP traffic transmission, overall performance is still limited because of access networks. Existing passive optical networks based on Ethernet technology are not fully compatible with optical burst switching, which results in bottlenecks on the border between transport and access networks. In this paper, we present a new method of optical wavelength time-division multiple access (OWTDMA) for passive optical networks. The proposed approach can provide outstanding scalability of network resources and can increase throughput of the optical access network. In addition, we propose implementation of OWTDMA in edge nodes of optical burst switching networks to eliminate bottlenecks between transport and access networks. Simulation results prove the advantage of our proposed approach.
Application of two-point boundary problem with optimization of a candidate function
Tomas Docekal,Stepan Ozana 제어로봇시스템학회 2020 제어로봇시스템학회 국제학술대회 논문집 Vol.2020 No.10
The paper deals with the control design of nonlinear systems. It presents the application of the presented methodology on a swing-up of a single inverted pendulum. It is aimed at planning the reference state trajectories and the appropriate feedforward control signal and formulated by a two-point boundary value problem. One of the complications during the solution tackles the problem of providing a good initial guess for state trajectories. The additional optimization procedure for dealing with this issue is described in this paper. There is an emphasis on the universality of the described solution of the boundary value problem because it can be applied for a variety of different nonlinear systems.