Performance Analysis of a Micro-scale Model Helicopter Rotor in Hover Flight

This experimental study contains the design, production, test and evaluation of the test processes of a Micro-Scale Rotor Test-Rig. For the study, NACA 0012 airfoil section is selected as a rotor blade without a twist and a taper ratio. The tests cover the thrust and the torque relation with different blade pitch angles and RPM values.


Evaluation of rotorcraft system identification approaches
Kaymak, Serkan; Tekinalp, Ozan; Kutay, Ali Türker; Department of Aerospace Engineering (2013)
This thesis addresses rotorcraft system identification approaches and estimating the stability and control parameters for linear system identification of a helicopter in hover. Output error and least square methods are used for the system identification. Inputs of the system identification analysis are obtained from the nonlinear helicopter model written in FLIGHTLAB commercial software environment. A linear helicopter model is used for identification. For validation, results obtained from identified helico...
Analytical modeling of asymmetric multi-segment rotor - bearing systems with Timoshenko beam model including gyroscopic moments
Özşahin, Orkun; Özgüven, Hasan Nevzat (2014-11-01)
In this study, analytical modeling and an analysis approach for asymmetric multi-segment rotor bearing systems are presented. Timoshenko beam model which includes the effect of gyroscopic moments is employed for modeling rotor segments. Instead of applying FEM, sub-segment Frequency Response Functions (FRFs) are obtained analytically, and sub-segment FRFs obtained are coupled by using receptance coupling method. Bearing properties are included into system dynamics by employing structural modification techni...
Control, design, and implementation of a low-cost ultracapacitor test system
Eroglu, Hasan Huseyin; Hava, Ahmet Masum (2013-01-01)
This paper reviews the ultracapacitor (UC) test procedures, establishes simple and economical power electronic conversion system-based UC test equipment, and experimentally evaluates the performance of a UC module. The power converter hardware structure and control algorithms of the designed system are discussed in detail. The high bandwidth and high accuracy current programming capability of the converter for the purpose of charging and discharging the UC, as required during testing, is illustrated via the...
Performance comparison of BRBFs designed using different response modification factors
Güner, Tuğberk; Topkaya, Cem (Elsevier BV, 2020-12-15)
This paper presents details of the numerical examination and performance comparison of steel buckling restrained braced frames (BRBFs) designed with different response modification factors, using the next-generation performance assessment approach. Archetypal BRBF designs were conducted following the US provisions and considering response factors equal to or less than the codified limit. The archetypical buildings were subjected to ground-motions acquired from the FEMA P695 Far-Field record-set and scaled t...
Joint shear strength prediction for reinforced concrete beam-to-column connections
Unal, Mehmet; Burak Bakır, Burcu (2012-02-10)
In this analytical study numerous prior experimental studies on reinforced concrete beam-to-column connections subjected to cyclic loading are investigated and a database of geometric properties, material strengths, configuration details and test results of subassemblies is established. Considering previous experimental research and employing statistical correlation method, parameters affecting joint shear capacity are determined. Afterwards, an equation to predict the joint shear strength is formed based o...
Citation Formats
M. Şahin and D. F. Kurtuluş, “Performance Analysis of a Micro-scale Model Helicopter Rotor in Hover Flight,” presented at the 8 th ANKARA INTERNATIONAL AEROSPACE CONFERENCE ,10-12 September 2015, METU, Ankara TURKEY, 2015, Accessed: 00, 2021. [Online]. Available: