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Robust Performance Analysis on Dynamic Control of Unmanned Aerial Vehicle System Using Bode Plot
Hteik Tin Cho Nyunt,
Thanda Win,
Hla Myo Tun
Issue:
Volume 7, Issue 4, December 2019
Pages:
48-53
Received:
19 October 2019
Accepted:
14 November 2019
Published:
25 November 2019
Abstract: The paper focuses on the robust performance analysis on dynamic control of unmanned aerial vehicle system with numerical computation. The objectives of this work are to find the appropriate solution for robust stability problems for dynamic control of unmanned aerial vehicle (UAV) system which is critical challenge in the space technology. The background of the theoretical work on digital control system is very important to study the problem of dynamic control system at present. The idea behind the control system stability analysis on digital technology is very important candidate in space technology. The specific purpose on analyzing the performance of dynamic of digital control system for space technology is solved in this paper. The mathematical model of target system is mentioned and analyzed based on the classical control method with digital technology. The related work for modeling of the control system is mentioned and expressed the detailed background for the analysis. The simulation results confirm that the proposed system met the robust performance for digital control of UAV system for reality. The analysis has been carried out based on feedback control system stability for dynamic system as well. The simulation results for stability analysis have been carried out by using MATLAB programming languages.
Abstract: The paper focuses on the robust performance analysis on dynamic control of unmanned aerial vehicle system with numerical computation. The objectives of this work are to find the appropriate solution for robust stability problems for dynamic control of unmanned aerial vehicle (UAV) system which is critical challenge in the space technology. The back...
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Advanced Panspermia of Origin of Life and Evolution
Venkata Subba Rao Yeragudipati
Issue:
Volume 7, Issue 4, December 2019
Pages:
54-66
Received:
2 November 2019
Accepted:
21 November 2019
Published:
26 November 2019
Abstract: In this study, a theory on Advanced Panspermia of Origin of Life and Evolution is proposed by establishing (i) striking planetary similarities observed for parents and their children of their respective birth times similar to matching bands in DNA Fingerprinting images of them establishing heredity; (ii) the number of DNA entries required to differentiate one person from the other being identical to the number of planetary configurations that would result (iii) the Lunar Magnetism Orchestrated Menstrual Cycle in Symphony of Reproduction of Life, and (iv) Cambrian Explosion witnessed origin of complex vertebrates simultaneously and all of a sudden. All the above comprise the strongest scientific evidence in the “Breakthrough of “Advanced Panspermia of Origin of Life and Evolution”. Perhaps, the totipotent cell, formed in space under abiotic conditions during the early days of the solar system, picks up different magnetic signals from out of the solar symphony and at different stages of its development and the DNA is thus programmed. These pre-programmed magnetic memories may be evoked later in evolution when similar magnetic signals are repeated. Life came into being from space brought by star dust on the Earth with each major change of climate for evolution at intervals of simple multiples of Geological Time Scale ‘Periods’. The study also discusses of how the Sun, Moon, and planets telegraph their effects to us, via interplanetary space striking Earth's magnetosphere, which are perceived by the neural network of the living beings, which are genetically predisposed to hear specific planetary signals.
Abstract: In this study, a theory on Advanced Panspermia of Origin of Life and Evolution is proposed by establishing (i) striking planetary similarities observed for parents and their children of their respective birth times similar to matching bands in DNA Fingerprinting images of them establishing heredity; (ii) the number of DNA entries required to differ...
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Variability of VTEC Gradient and TEC Rate Index Over Kisumu, Kenya During Selected Quiet and Storm Days of 2013 and 2014
Uluma Edward,
Ndinya Boniface,
Omondi George
Issue:
Volume 7, Issue 4, December 2019
Pages:
67-72
Received:
30 October 2019
Accepted:
26 November 2019
Published:
4 December 2019
Abstract: Vertical Total electron content (VTEC) gradient or rate of change of TEC (ROT) and total electron content (TEC) rate index or rate of change of TEC index (ROTI) can directly be estimated from receiver independent exchange (RINEX) data and can be used to estimate presence and intensity of ionospheric irregularities. In this paper we present results of the variation of ROT and ROTI over Kisumu, Kenya (Geomagnetic coordinates: 9.64°S, 108.59°E; Geographic coordinates: 0.02°S, 34.6°E) for both selected quiet and disturbed conditions between 1st January 2013 and 31st December 2014 using data derived from NovAtel GSV4004B SCINDA-GPS receiver at Kisumu as a step in establishing ionospheric irregularities over Kisumu, Kenya during a high solar activity period of solar cycle 24. ROT was calculated from filtered average daily VTEC data within intervals of 120 seconds while ROTI was computed over 4 minutes window from ROT. ROT and corresponding ROTI for the selected quiet and storm days were plotted against universal time (UT). The presence and intensity of irregularities on the selected quiet and storm days of the years 2013 and 2014 were determined by checking ROT fluctuations and the corresponding ROTI values from the plots. The obtained results showed increased fluctuation of ROT corresponding with large ROTI values after sunset. The selected storm days of the years 2013 and 2014 had higher ROTI values than the selected quiet days of the years 2013 and 2014. The higher ROTI values during the selected storm days may be attributed to the impact of geomagnetic storms brought about by several competing dynamics including Prompt penetration electric field (PPEF), disturbance dynamo electric field (DDEF) and reduction in electron density due to increased recombination rates. The high ROTI values after sunset were a manifestation of post-sunset plasma irregularities. The obtained results also showed a diurnal trend for ROT and ROTI where ROT increased steadily from 0.00UT to around 12:00UT before falling and having an increased fluctuation between 18:00UT and 20:00UT. This corresponded well with low ROTI values between 0:00UT and 16:00UT followed by high ROTI values between 18:00UT and 20:00UT. The diurnal variability of ROT might have resulted from variation of TEC and which was attributed to changes in the intensity of incoming solar radiation.
Abstract: Vertical Total electron content (VTEC) gradient or rate of change of TEC (ROT) and total electron content (TEC) rate index or rate of change of TEC index (ROTI) can directly be estimated from receiver independent exchange (RINEX) data and can be used to estimate presence and intensity of ionospheric irregularities. In this paper we present results ...
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An Alternative Model of Rotation Curve that Explains Anomalous Orbital Velocity, Mass Discrepancy and Structure of Some Galaxies
Issue:
Volume 7, Issue 4, December 2019
Pages:
73-79
Received:
13 November 2019
Accepted:
7 December 2019
Published:
19 December 2019
Abstract: A new model of galaxy rotation based on the cyclostrophic model of vortices found in nature is developed. The model is tested using the SPARC dataset of 175 galaxies and a smaller dataset comprising of 60 galaxies. Analysis of the datasets showed that galactic rotation can be adequately described using the observed surface brightness of galaxies and the newly developed cyclostrophic velocity model. The use of the luminosity and the inverse mass-to-light ratio in lieu of the surface brightness, also yield a very good fit of the observed and computed galaxy rotation velocity. Evidently, galactic rotation greatly depends on the cyclostrophic balance of the pressure gradient and the centrifugal forces and the seismic-induced radial expansion occurring in various stars. This is the most probable origin of the action of a single force law that has been overlooked in previous studies. Therefore, the need for a super-massive black hole at the center of galaxies or hidden dark matter can be eliminated. Attractive gravitational force can occur even without a massive black hole at the center of galaxies. There appears to be a pressure gradient force between the center and the outer parts of galaxies that sustains attraction. The cyclostrophic model appears to be the physical basis of the Tully-Fisher relation. Furthermore, the missing mass problem associated with galactic rotation can be attributed to the orbital expansion of celestial objects perturbed by seismic-induced forces. In addition, massive tremors or starquakes may create a domino effect in perturbing nearby stars along the axis of the seismic-induced force and this could result in the formation of elliptical galaxies as the orbits of seismic-perturbed neighboring stars become larger.
Abstract: A new model of galaxy rotation based on the cyclostrophic model of vortices found in nature is developed. The model is tested using the SPARC dataset of 175 galaxies and a smaller dataset comprising of 60 galaxies. Analysis of the datasets showed that galactic rotation can be adequately described using the observed surface brightness of galaxies an...
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