Aerodynamic Design of the Solar-Powered High Altitude Long Endurance (HALE) Unmanned Aerial Vehicle (UAV)

Hwang, seung-jae; Kim, Sang-Gon; Kim, Cheol-Won; Lee, Yung-Gyo

doi:10.5139/ijass.2016.17.1.132

Cited by 24 publications

(8 citation statements)

References 2 publications

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“…The dynamic model was obtained using the Euler-Langrage method. The PID controller is used to control the hovering unmanned vehicle or track its trajectory [4,5,6,14,15].…”

Section: Control Systems For Unmanned Aerial Vehicles Uavsmentioning

confidence: 99%

A Mathematical Model for Controlling a Quadrotor UAV

Kowalik¹,

Novák

2021

Transactions on Aerospace Research

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Given the recent surge in interest in UAVs and their potential applications, a great deal of work has lately been done in the field of UAV control. However, UAVs belong to a class of nonlinear systems that are inherently difficult to control. In this study we devised a mathematical model for a PID (proportional integral derivative) control system, designed to control a quadrotor UAV so that it follows a predefined trajectory. After first describing quadrotor flight dynamics, we present the control model adopted in our system (developed in MATLAB Simulink). We then present simulated results for the use of the control system to move a quadrotor UAV to desired locations and along desired trajectories. Positive results of these simulation support the conclusion that a quadrotor UAV spatial orientation control system based on this model will successfully fulfil its task also in real conditions.

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“…The dynamic model was obtained using the Euler-Langrage method. The PID controller is used to control the hovering unmanned vehicle or track its trajectory [4,5,6,14,15].…”

Section: Control Systems For Unmanned Aerial Vehicles Uavsmentioning

confidence: 99%

A Mathematical Model for Controlling a Quadrotor UAV

Kowalik¹,

Novák

2021

Transactions on Aerospace Research

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“…Hwang et al [9] developed a design of EAV-3 HALE UAS based on a solar-electric power supply. The EAV series of HALE UAS was designed to compete with the Qinetiq's Zephyr 7 the UAS with the longest flight time, with a target to stay in flight for up to 5 years [9]. The solar panel powered UAS is used for high altitude reconnaissance operation such as the PHASA-35 solar-powered UAS.…”

Section: Abbreviationsmentioning

confidence: 99%

Design of an unmanned aircraft system for high-altitude 1 kW fuel cell power system

Reid

Albayati

2021

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A proton exchange membrane (PEM) fuel cell is particularly considered as a prime power supply for a fuel cell-powered unmanned aircraft system (UAS) as it possesses a very high-power density in comparison with other fuel cell types, hence a high potential to be used for high altitude long endurance (HALE) UAS flights. This paper will focus on examining the design requirements for the UAS-based 1 kW PEM fuel cell for high altitude operation (10–11 km), which can be correlated into a quantitative data to produce a design constraints diagram. The maximum take-off mass, endurance, and geometries for potential UAS design are estimated. Four different geometrical design profiles are developed and presented. The resulting geometries are analysed and the design parameters of the estimated 1 kW design yielded an aircraft of maximum take-off mass 34.8 kg, wingspan of 10.4 m, cruising speed 20 m/s, stall speed 11.23 m/s, and maximum endurance of 4 h. The constraint diagram deploys these assumptions as well as values generated through the design calculations to form a possible design of which the 1 kW UAS falls slightly outside of the possible design space; this is due to the minimum thrust-to-weight ratio required to achieve the desired service ceiling; however, further alterations and adjustments on the design and mission requirements are provided to place the design of the UAS within the possible design space.

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“…However, the thermal efficiency of the combustion engine has almost reached its full potential using these methods. Some new aero-engine schemes were proposed, such as pulse detonation engines, fuel cell engines [3], solar-powered engines [4], and so on. Fuel cells can be considered power sources for small commuter airplanes and unmanned aerial vehicle engines [5].…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Performance Comparisons of Ideal Brayton Cycles Integrated with High Temperature Fuel Cells as Power Sources on Aircraft

Guo

Zhu

et al. 2023

Sustainability

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Developing hybrid electric aircraft is propitious to reducing carbon dioxide emissions and fuel consumption. Combustion engines coupled with solid oxide fuel cells are proposed for aircraft propulsion systems, where the compressor is powered by fuel cells instead of turbines. The thermal cycle of the new engine is obviously different from that of conventional combustion engines and can be characterized in the temperature entropy diagram under some reasonable assumptions, which were analyzed and investigated. Performance parameters, such as the specific thrust, are derived and can be expressed by several fundamental thermal parameters. Three different cycles integrating Brayton cycles and SOFC are shown. The main conclusions are as follows: (1) The maximum operating pressure ratio of the Brayton cycles integrated with fuel cells is 32. The maximum thermal efficiency of the cycle at the lowest combustion temperature is 82.2%, while that of the BC is 65.1% at the high combustion temperature. (2) The new cycles can not work if the combustion temperature is lower than 1350 K. Otherwise, the fuel utilization will be too huge.

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Aerodynamic Design of the Solar-Powered High Altitude Long Endurance (HALE) Unmanned Aerial Vehicle (UAV)

Cited by 24 publications

References 2 publications

A Mathematical Model for Controlling a Quadrotor UAV

A Mathematical Model for Controlling a Quadrotor UAV

Design of an unmanned aircraft system for high-altitude 1 kW fuel cell power system

Thermodynamic Performance Comparisons of Ideal Brayton Cycles Integrated with High Temperature Fuel Cells as Power Sources on Aircraft

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