Estimation of Energy Potential for Control of Feeder of Novel Cruiser/Feeder MAAT System

Pshikhopov, Viacheslav; Krukhmalev, Victor; Medvedev, Mikhail; Neydorf, Rudolf

doi:10.4271/2012-01-2099

Cited by 13 publications

(6 citation statements)

References 1 publication

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“…The difficulties related to the energetic balances related to unconventional high altitude airships has been analysed by Pshikhopov [21,22] and confirmed by Dumas [23,24] and Khoshnoud [20,25]. The exigency of producing an effective optimization of the plants and the consequent design guidelines have been demonstrated by Smith [26,27].…”

Section: Maat Design Activitymentioning

confidence: 99%

Long permanence high altitude airships: the opportunity of hydrogen

Bonnici

Tacchini

Vucinic

2013

Eur. Transp. Res. Rev.

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Introduction MAAT cruiser/feeder airship system is a transport system financed by European 7th Framework programme 2011. The project aims to realize a cruiser/feeder airship system, which can connect major populated centres worldwide. The MAAT cruiser feeder system is based on two different airships, the cruiser, which remains airborne for long times, and the feeder, which connects the cruiser with the ground and vice versa. This paper traces a detailed bibliography about MAAT project showing the actual state of the art of the project. This bibliographic review allows understanding the level of innovation related to this project. Methods Starting from the results of the preceding literature, the authors present a model of the cruiser, in terms of both mass and energy. According to the preceding studies, they have assumed the following minimal set of hypothesis: the buoyant gas is hydrogen; the shape of the cruiser is a discoid; operative altitude is in the range 15-17 km. It is well known that the major showstopper to actual diffusion of airships is related to the initial costs related to the use of Helium. The problem is more accentuated in Europe than in USA and Russia, because of higher unitary prices. An economic comparison with the possibility of using Hydrogen has produced. A further comparison has performed in terms of operations, focusing on the necessity of replacing the gas, which disperses in the external atmosphere because of the porosity of the tissues of the balloon system. The on board generation of hydrogen as an energy system is very convenient on long permanence airships because the replacement buoyant gas can be produced on board. It has been also traced a complete energy balance of the cruiser airship assuming it as discoid. On one side it has been evaluated the hydrolysis process against batteries showing that an hydrolyser/fuell cell cycle has a lower efficiency in comparison of batteries but it looks less expensive and presents a lower weight than any battery type.Results This paper has clearly demonstrated that the use of hydrogen is much more convenient than the uoiuse of Helium, even if it require an accurate design to minimize the risks related to hydrogen potential flammability. It demonstrates the necessity of using hydrogen as buoyant gas in long endurance airships because of the easiness of replacement. An estimation of the necessary energy requirements for a discoid airship has produced demonstrating clearly that a discoid shaped airship is energetically inefficient. These results force to consider a different and more efficient cruiser system. Conclusions In conclusion this paper demonstrates clearly the necessity of using hydrogen to allow possible future airship renaissance, which could be a fundamental option for the future because of airships are the most energetically efficient aerial vehicles. This research activity has also clearly demonstrated that the initial discoid shaped cruiser hypothesis is not feasible on energetic point of view.

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Section: Maat Design Activitymentioning

confidence: 99%

Long permanence high altitude airships: the opportunity of hydrogen

Bonnici

Tacchini

Vucinic

2013

Eur. Transp. Res. Rev.

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“…We will enter a macro variable, reflecting an evaluation error, where is an estimation of revolting disturbance: . (9) In accordance with [8,9] we will enter equalization equation (10), where is an arbitrary function, which will be determined in the process of observer synthesis, is a new variable:…”

Section: Synthesis Of Observermentioning

confidence: 99%

“…For providing of estimation asymptotic convergence, we will demand, that the error submitted to the decision of equalization [21][22][23][24][25]:…”

Section: Synthesis Of Observermentioning

confidence: 99%

“…The model of adaptive nonlinear control system consist of two m-file, the first of which describes used constants and variables, specify the conditions of calling the built-in MATLAB functions, processed the results and built the required graphics. The second file is an m-file to calculate the right parts of the differential equations, described by formulas (3) ,(4), (19) and (22), in accordance with the syntax and call rules of these functions in MATLAB. Let disturbances be the change of electric load and frequency of DFIG shaft rotation.…”

Section: Computer Simulationmentioning

confidence: 99%

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The system of nonlinear adaptive control for wind turbine with DFIG

Medvedev¹,

Mazalov²

2014

EAI Endorsed Transactions on Energy Web

Self Cite

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This paper presents a problem solution of the stable voltage generating in the changing terms of environment for the double-fed induction generator (DFIG). For this, in nonlinear multivariable systems, such as mathematical model of DFIG, the method of observer's synthesis for external, parametric and structural disturbances was used. This allows, on the basis of disturbances approximation, to carry out an evaluation under conditions of uncertainty, leading to disturbances adaptation with a priori unknown structure. The work presents a synthesis method of control system, allowing to solve indicated problem. Stand-alone wind turbine used as a power plant with DFIG. The control system uses the original nonlinear mathematical model of the DFIG in rotating "dq" coordinates, taking into account non-linear changes in the parameters. To confirm the effectiveness of the problem solution, mathematical computer model was developed. The paper also presents the results of full-scale simulation.

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“…Enrichment of mixture using additional oxidizer, converting oxygen, introduced into the combustor chamber, into ozone [1], improves the quality of combustion and curbs pollution. The assessment, control of an energy potential and efficiency of use of energy of moving objects in difficult dynamic systems are considered in [3][4][5][6].…”

mentioning

confidence: 99%

Air-Fuel Ozonation System for a Combustion Engine Addressing an Environmental Target

Poluyanovich

BURKOV

Rassoha

et al. 2015

AMM

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The summary of results obtained in experimental studies to convert oxygen into ozone is discussed. The dependence of oxygen and ozone fuel burning is observed and optimized. The ozonation structure system for a combustion engine (CE) is developed. Adaptive automation system strategy is devised. The prototype model of ozone-ventilating device for a combustion engine fuel system is developed. The system is installed in the combustion engine. The analysis of exhaust gas concentration is performed applying an ozonizer and without it.

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Estimation of Energy Potential for Control of Feeder of Novel Cruiser/Feeder MAAT System

Cited by 13 publications

References 1 publication

Long permanence high altitude airships: the opportunity of hydrogen

Long permanence high altitude airships: the opportunity of hydrogen

The system of nonlinear adaptive control for wind turbine with DFIG

Air-Fuel Ozonation System for a Combustion Engine Addressing an Environmental Target

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