Experimental Investigation ofthe Hovering Performance of aTwin-Rotor Test Model

Farid Shahmiri

Volume 10, Issue 2 , September 2013

Abstract
  Hover performance of a twin-rotor test model in terms of rotor overlap sweep, blade collective pitch, and blade tip speedwasexaminedexperimentally.The experimental setup consisted of two three-bladed rotors (tandem rotor configuration) with a diameter of1,220 mm and constant chord of 38 mm, giving a ...  Read More

Real Time Calibration of Strap-down Three-Axis-Magnetometer for Attitude Estimation

M. Kiani

Volume 10, Issue 2 , September 2013

Abstract
  Three-axis-magnetometers (TAMs) are widely utilized as a key component of attitude determination subsystems and as such are considered the corner stone of navigation for low Earth orbiting (LEO) space systems. Precise geomagnetic-based navigation demands accurate calibration of the magnetometers. In ...  Read More

Optimization of Moving Wingin Ground Effect using Response Surface Method

M. H. Djavareshkian; A. Esmaeili

Volume 10, Issue 2 , September 2013

Abstract
  Optimization of the sectional wing in ground effect (WIG) has been studied using ahigh order numerical procedure and response surface method (RSM). Initially, the effects of the ground clearance, angle of attack, thickness, and camber of wing have been investigated by a high-resolutionscheme, which is ...  Read More

Second Order Sliding Mode Observer-Based Control for Uncertain Nonlinear MEMS Optical Switch

H. Fazeli

Volume 10, Issue 2 , September 2013

Abstract
  This paper studies theuncertain nonlinear dynamics of a MEMS optical switch addressing electrical, mechanical and optical subsystems. Recently, MEMS optical switch has had significant merits in reliability, control voltage requirements and power consumption. However, an inherent weakness in designing ...  Read More

A Wavelet-based Spoofing Error Compensation Technique for Single Frequency GPS Stationary Receiver

M. R. Mosavi; A. R. Baziar; M. Moazedi

Volume 10, Issue 2 , September 2013, Pages 9-16

Abstract
  Spoofing could pose a major threat to Global Positioning System (GPS) navigation, so the GPS users have to gain an in-depth understanding of GPS spoofing. Since spoofing attack can influence position results, spoof compensation is possible through reducing position deviations. In this paper, a novel ...  Read More

Plunging Airfoil Load Characteristics Equipped with Gurney Flap

M. Mani

Volume 10, Issue 2 , September 2013, Pages 25-36

Abstract
  Numerous experiments have been conducted on plunging Eppler 361 airfoil in a subsonic wind tunnel. The experimental tests involved measuring the surface pressure distribution over the airfoil at Re=1.5×105. The airfoil was equipped with Gurney flap(heights of 2.6, 3.3 and 5% chord) and plunged at 6cm ...  Read More