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Articles 31 - 43 of 43
Full-Text Articles in Engineering
Adaptive Filtration Of The Uav Movement Parameters Based On The Aoa-Measurement Sensor Networks, Igor Tovkach, Serhii Zhuk
Adaptive Filtration Of The Uav Movement Parameters Based On The Aoa-Measurement Sensor Networks, Igor Tovkach, Serhii Zhuk
International Journal of Aviation, Aeronautics, and Aerospace
Currently, the urgent task is to assess the small-sized maneuvering UAVs movement parameters. The location of an unknown UAV as a radio source can be determined using AoA measurements of the wireless sensor network. To describe the movement of a maneuvering UAV, a model is used in the form of a dynamic system with switching in discrete time. The values of switching variable determine type of UAV movement. To synthesize trajectory filtering algorithms, the Markov property of the extended process is used, which includes a vector of UAV movement parameters and a switching variable. The optimal trajectory filtering algorithm describes …
Mini Unmanned Aerial Systems (Uav) - A Review Of The Parameters For Classification Of A Mini Uav., Ramesh Ps, Muruga Lal Jeyan
Mini Unmanned Aerial Systems (Uav) - A Review Of The Parameters For Classification Of A Mini Uav., Ramesh Ps, Muruga Lal Jeyan
International Journal of Aviation, Aeronautics, and Aerospace
In the recent years, Mini Unmanned Aerial Vehicle (UAV) has generated a lot of interest both in military and civilian applications. Contemporary innovations have seen the entry of Mini UAV into a wide range of hitherto fore unexplored domains. Advancement in computer systems, miniaturisation of electronics, artificial intelligence and composite materials is propelling the development of Mini UAV. Mini UAV is a class of UAV within the large family of unmanned systems categorised by a set of parameters. However, there are glaring inconsistencies and lack of uniformity in specifying the parameters which define a Mini UAV. The paper explores the …
Low Thrust And Low Power Propulsion Systems Options For Small Satellites, Redha Amri
Low Thrust And Low Power Propulsion Systems Options For Small Satellites, Redha Amri
International Journal of Aviation, Aeronautics, and Aerospace
The present work focuses on the study of low thrust propulsion systems. Cold gas, thermal and monopropellant systems with a blow down depressurisation mode have been taken in consideration in this study. Most of propellants that can be used for small satellite propulsion systems were selected here in order to give the propulsion engineer many propellant options with a good idea about the performance of each propellant, and this is important to make a good trade-off during the system design. For cold gas and thermal propulsion, the propellants taken into account in this study are: Oxygen (O2), Nitrogen (N2), Hydrogen …
Performance Characteristics Design Of Pulsed Plasma Thrusters For Drag Counter-Reacting, Dr. Sam Dakka
Performance Characteristics Design Of Pulsed Plasma Thrusters For Drag Counter-Reacting, Dr. Sam Dakka
International Journal of Aviation, Aeronautics, and Aerospace
Determining the performance characteristics of off the shelf pulsed plasma thrusters to enhance the life time of low earth orbiting platforms was investigated theoretically. Pulsed plasma thruster analysis was accomplished through development of correlations from historical data that distinguished between breech fed propellant to side fed propellant designs. Based on semi-empirical equations the power required by the thruster to counter react the drag was estimated and mapped for 1U to 27U CubeSat configurations for altitude ranging between 200km to 600km. It appears that the power required is dependent on the feeding delivery system design. For side fed designs the power …
Converting The Aircraft Passenger’S Cabin To An Airship When There Is A Danger Of Crash, Abouzar Bahari
Converting The Aircraft Passenger’S Cabin To An Airship When There Is A Danger Of Crash, Abouzar Bahari
International Journal of Aviation, Aeronautics, and Aerospace
From the beginning of the airplane invention until now, many kinds of airliners have been introduced by different companies to transport the people throughout the world. However, although the manufacturing companies have highly promoted the technical and safety systems of the airliners and made them the safest traveling equipment, there is still a possibility of their failure in the technical and/ or safety systems. The serious faults that may occur in an aircraft during the flight can cause the loss of its control. Improving the aircraft safety to guarantee the security, both bodily and spiritually, is of a high demand. …
Experimental And Computational Evaluation Of Five Hole Five Probe Flow Analyzer For Subsonic Wind Calibration, Akhila Rupesh Ms, J V Muruga Lal Jeyan Dr
Experimental And Computational Evaluation Of Five Hole Five Probe Flow Analyzer For Subsonic Wind Calibration, Akhila Rupesh Ms, J V Muruga Lal Jeyan Dr
International Journal of Aviation, Aeronautics, and Aerospace
It is very essential to predict the flow and its related parameters to understand real life fluid flow. The real-life fluid problems are studied with wind tunnels which gives very efficient results in practice. But in the case of wind tunnel studies flow angularities plays crucial role. Flow angularity determination includes measurement of static pressure, dynamic pressure and inflow angles. Flow prediction even hold a very strong hand in design process. Designing and testing being the foundation of any process industry, flow measurements and its related parameters have to be well evaluated. In such cases, wind tunnels play important role …
A Review Of Dji’S Mavic Pro Precision Landing Accuracy, Cody Yoakum, Joseph Cerreta
A Review Of Dji’S Mavic Pro Precision Landing Accuracy, Cody Yoakum, Joseph Cerreta
International Journal of Aviation, Aeronautics, and Aerospace
Precision landing has the potential to increase the accuracy of autonomous landings. Unique applications require specific landing performance; for example, wireless charging loses efficiency with a misalignment of 100mm. Unfortunately, there is no publicly available information for the DJI Mavic Pro’s landing specifications. This research investigated the ability of a Mavic Pro to land at a specified point accurately. The purpose of this research is to determine if precision landings are more accurate than non-precision autonomous landings and if the Mavic Pro is capable of applications such as wireless charging when using precision landings. A total of 128 (64 precision …
Solar One: A Proposal For The First Crewed Interstellar Spacecraft, Alberto Caballero
Solar One: A Proposal For The First Crewed Interstellar Spacecraft, Alberto Caballero
International Journal of Aviation, Aeronautics, and Aerospace
In this paper it is presented the concept and design of a new type of spacecraft that could be used to make the first manned interstellar travel. Solar one would integrate three near-term technologies, namely: compact nuclear fusion reactors, extremely large light sails, and high-energy laser arrays. A system of lenses or mirrors to propel the sail with sunlight is suggested as an alternative to laser propulsion. With a mile-long light sail, Solar One could reach an average of 22% the speed of light, arriving to the closest potentially habitable exoplanet in less than 19 years with the help of …
Simulation Analysis Of The Effects Of Performance-Based Navigation On Fuel And Block Time Efficiency, Shlok Misra
Simulation Analysis Of The Effects Of Performance-Based Navigation On Fuel And Block Time Efficiency, Shlok Misra
International Journal of Aviation, Aeronautics, and Aerospace
The commercial aviation industry has been grown steadily in the past decade in terms of the number of flights operated and passengers traveled. The Federal Aviation Administration has introduced several technologies and initiatives under the NextGen Program. Performance-Based Navigation (PBN) is one such technology that is aimed at improving the efficiency of the National Airspace System which will improve system capacity and reduce delays. The airlines operate with restrained resources and investments into reducing fuel costs and flight times will directly or indirectly impact profit margins. PBN procedures and routes can help airlines reduce block times as flights will be …
Experimental Evaluation Of Strength Degradation Temperature For Carbon Epoxy Filament Wound Composite, Jai Krishna Mishra, Surya Prakash Rao Ch Dr, Subhash Chandra Bose P Dr, Kishore Nath N Dr, Rama Rao Golla Mr
Experimental Evaluation Of Strength Degradation Temperature For Carbon Epoxy Filament Wound Composite, Jai Krishna Mishra, Surya Prakash Rao Ch Dr, Subhash Chandra Bose P Dr, Kishore Nath N Dr, Rama Rao Golla Mr
International Journal of Aviation, Aeronautics, and Aerospace
Polymeric composites have been widely used in various structural and thermal aerospace applications. Polymeric composites having high strength and high modulus reinforcement are ideally suited for lot of critical aerospace applications as structure is designed with high specific strength and high specific modulus. In case of launch vehicles/ missile one such application is design and manufacturing of solid rocket motor casing with polymeric composites as it give high performance and reduces inert weight of propulsion system. The high specific strength and high specific modulus of composite materials makes it ideal choice for designing the composite rocket motor case (CRMC). These …
Real-Time Urban Weather Observations For Urban Air Mobility, Kevin A. Adkins, Mustafa Akbas, Marc Compere
Real-Time Urban Weather Observations For Urban Air Mobility, Kevin A. Adkins, Mustafa Akbas, Marc Compere
International Journal of Aviation, Aeronautics, and Aerospace
Cities of the future will have to overcome congestion, air pollution and increasing infrastructure cost while moving more people and goods smoothly, efficiently and in an eco-friendly manner. Urban air mobility (UAM) is expected to be an integral component of achieving this new type of city. This is a new environment for sustained aviation operations. The heterogeneity of the urban fabric and the roughness elements within it create a unique environment where flight conditions can change frequently across very short distances. UAM vehicles with their lower mass, more limited thrust and slower speeds are especially sensitive to these conditions. Since …
Active Fault-Tolerance Of The Unmanned Aerial Vehicle Automatic Control Systems, Vuong Anh Trung, Nguyen Van Thinh, Nguyen Duc Thanh, Nguyen Quang Vinh, Tran Thuan Hoang
Active Fault-Tolerance Of The Unmanned Aerial Vehicle Automatic Control Systems, Vuong Anh Trung, Nguyen Van Thinh, Nguyen Duc Thanh, Nguyen Quang Vinh, Tran Thuan Hoang
International Journal of Aviation, Aeronautics, and Aerospace
This paper presents an introductory overview of principles of the three-layer hierarchy of active fault-tolerance, providing, determination of the fault type with as many details as enough to get recoverable fault reason and failure toleration by flexible redundancy using; the conception of active fault-tolerant control in abnormal modes is described. Developed models and methods of a systematic approach to fault tolerance in the direction of the effective use of the signal, parametric and structural redundancies and selection of parrying tools. Performed experimental researches of the unmanned aerial vehicle (UAV) automatic control systems (ACS).
The Detrimental Effect Of Rainfall On Performance And Stability Characteristics Of Aircrafts-A Comprehensive Review, Praneeth Hr Mr, Amit Kumar Thakur Dr
The Detrimental Effect Of Rainfall On Performance And Stability Characteristics Of Aircrafts-A Comprehensive Review, Praneeth Hr Mr, Amit Kumar Thakur Dr
International Journal of Aviation, Aeronautics, and Aerospace
The rapidly growing global market demands faster transit of human beings and goods even in unfavorable weather conditions of rainfall. The paper gives an overview of rain research methodologies, mathematical models to track raindrops in the flow field. The paper depicts the havoc rainfall causes on performance characteristics for various phases of flight in terms of evaluation of CL and CD and dynamic performance parameters such as short period mode. The knowledge obtained by this review paper could help designers to modify the design of aircraft such that it has better performance, stability, and control characteristics for all …