Conceptual design of a stealth unmanned combat aerial vehicle with multidisciplinary design optimization

Çakın, Uğur
The present study aims to develop a methodology for multi-disciplinary design optimization (MDO) of an unmanned combat aerial vehicle. At the current stage of optimization study, three disciplines are considered, which are aerodynamics, structural weight and radar cross section (RCS) signature. As objective functions, maximum range and minimum RCS signature are employed. To generate pareto-optimal solutions, multi-objective particle swarm optimization (MOPSO) function of MATLAB® is performed. To get aerodynamic coefficients of generated UCAV geometries, a high-fidelity aerodynamic analysis tool SU2 is employed. Moreover, to shorten computational effort, firstly, a meta-model for aerodynamic results is formed by performing multivariate adaptive regression splines (MARS) approximation. Structural and system weights are estimated by using statistical weight equations. After that, by using aerodynamic coefficients and estimated total weight, range is calculated. RCS signature values are calculated by conducting POFACETS which is an implementation of the physical optics approximation for predicting RCS of complex objects. Also, meta-model of RCS results is generated for decreasing the computational time. Finally, the developed framework is performed to optimize a UCAV planform as an example of the framework’s capability. The pareto-front results for MDO computations are presented in detail at results and discussion.


Design of a high speed decoy UAV
Baykara, Umut; Alemdaroğlu, Hüseyin Nafiz; Department of Aerospace Engineering (2016)
This study consists of design, CFD aerodynamic analysis and optimized selection of a high speed decoy UAV. The mission requirements for the high speed decoy are based upon the previous experiences in literature. The requirements are specified as: Maximum altitude of 15000 ft, maximum speed of 450 kts and an endurance of at least 1 hour. The decoy UAV is launched from a pneumatic catapult and lands via a parachute system. It is a highly agile aircraft having a very high maneuverability capability. The aircra...
Design of a medium range tactical UAV and improvement of its performance by using winglets
Turanoğuz, Eren; Alemdaroğlu, Hüseyin Nafiz; Department of Aerospace Engineering (2014)
The study encompasses the design, performance analysis and aerodynamic improvement of the designed medium range tactical unmanned aerial vehicle. Main requirements are set as following; cruising altitute above 3500m, endurance of approximately 10-12 hours, range of 150 km and payload of 60 kg. The conventional design phase is based on the employment of historical equations and experiences. Nowadays, employement of well known equations and experiences during the desing process are not enough to reveal a comp...
Vision-aided landing for fixed wing unmanned aerial vehicle
Esin, Engin; Kutay, Ali Türker; Department of Aerospace Engineering (2016)
The aim of this thesis is to design an autoland system for fixed wing unmanned aerial vehicle (UAV) to make auto landing by using position information calculated by image processing algorithms. With this ability, even if GPS is not available to be used, UAV still could make a safe automatic landing. Landing autopilot is aimed to keep UAV on a straight line with a constant flight path angle. Therefore, landing autopilot and computer vision methods are studied within the scope of this thesis. Also, to test de...
Development of a UAV testbed
Çakır, Zeynep; Yavrucuk, İlkay; Tekinalp, Ozan; Department of Aerospace Engineering (2011)
The development and testing for a UAV testbed to be used in academic research and undergraduate education is proposed in this thesis. Analysis on commercial off -the-shelf UAV systems and autopilots lead to the development of a custom, open-architecture and modular UAV testbed. The main focus is to support research in UAV control field and education of the undergraduate students. The integration and use of commercial-off -the-shelf avionics and air vehicle are described in detail. System performance is exam...
Task assignment and scheduling in UAV mission planning with multiple constraints
Semiz, Fatih; Polat, Faruk; Department of Computer Engineering (2015)
In the recent years, unmanned aerial vehicles (UAVs) have started to be utilized as the first choice for high risk and long duration tasks, because UAVs are cheaper; they are hard to be noticed and they can perform long duration missions. Furthermore, the utilization of UAVs ensures to reduce the risk to the human life. Examples of this kind of missions includes signal collection, surveillance and reconnaissance and combat support missions. It is valuable to develop a fully autonomous UAV fleet to perform t...
Citation Formats
U. Çakın, “Conceptual design of a stealth unmanned combat aerial vehicle with multidisciplinary design optimization,” M.S. - Master of Science, Middle East Technical University, 2018.