Using genetic algorithm in airfoil design

Bu çalışmada, kanat profili dizaynı amacıyla kullanılacak reel kodlu genetik algoritmalar için  yeni bir yaklaşım olan Titreşim kavramı ve bu kavramının uygulamasıyla ortaya çıkan Titreşimli Mutasyon tekniği açıklanmıştır. Titreşim kavramının arkasında yatan temel fikir, genetik algoritmanın arama/bulma etkinliğinin arttırılması için popülasyonun periyodik olarak çözüm uzayına yayılmasıdır. Bu amaçla kullanılan Titreşimli Mutasyon Tekniği ile popülasyondaki tüm bireyler periyodik olarak mutasyon işleminden geçirilir ve popülasyonda etkin bir çeşitlilik sağlanır. Vizkoz olmayan, sesaltı, sıkıştırılamaz akış şartlarındaki kanat profili dizaynı uygulamaları yöntemin etkinliğini göstermiş ve Hesaplamalı Akışkanlar Dinamiği hesabı sayısı önemli ölçüde azaltılmıştır. Anahtar Kelimeler: Titreşimli genetik algoritma, kanat profili dizaynı.In this study, new approaches to genetic algorithms used for aerodynamic design and optimization, called Vibration concept and its applications are made. Vibrational Mutation technique resulting from Vibration concept, and the method of Vibrational Genetic Algorithm, which uses this technique, are detailed. Vibration concept is based on the idea that the population is spread out over the design space periodically to make exploration/exploitation of the genetic algorithm more effective. The aim of Vibrational Mutation is to get effective diversity in the population by using mutation operator. Values of the individuals in the population are changed periodically in mutational manner by using vibrational mutation technique during genetic process. So, the individuals concentrated on some region in the design space, spread out over the design space again. Thus, it is possible to escape local optimums quickly and to explore more fitting individuals. Therefore, genetic process gets faster and solution can be obtained by making less CFD calculation. Application of the method to a test function has given good results; genetic process have become faster about two times for aerodynamic optimization. Applying it to inverse airfoil design for subsonic, inviscid, incompressible flow condition, and the number of Computational Fluid Dynamics calculations are decreased considerably shows effectiveness of this method.  Keywords: Vibrational genetic algorithm, airfoil design

TO DESIGN AND BUILD OF A SURVEILLANCE/ATTACK MINI UNMANNED AERIAL VEHICLE (UAV)

In this study, it is aimed to analyze an unmanned air vehicle (UAV) design parameters, to finish design calculations and aerodynamic and performans calculations. Therefore, this study helps UAV works carried out within the Turkish Air Force Academy undergraduate and graduate training programs. Within the study, the goal is to design and build a propeller driven, electric powered, unmanned “Surveillance and Attack” R/C airplane which is capable of flying three predefined missions: Ferry Flight, Surveillance Flight and Stores Release/Asymmetric Loads Flight.So, in the design phase, so many package programs are used to obtain visual details. In manufacturing phase, TUAF (Turkish Air Force Academy), ITU (Istanbul Technical University) and Baykar Machinarys’ all opportunities and capabilities were benefitted from