Aerospace Science and Technology
Analytical and Numerical Investigation of Effective Parameters on Energy Absorption Circular Composite Tube under Internal Pressure and Axial

Milad Noorabadi; Rahnama Malihe; Ghasemi Mohammad Amin; Jafar Eskandari Jam

Volume 12, Issue 2 , October 2019, Pages 1-9

Abstract
  In this paper the energy absorption capacity of stiffened circular composite tube is considered. The governing equations and dynamic equilibrium are first derived and then solved. Additionally, a finite element model of reinforced circular composite tube structure is modeled. At the following, the effects ...  Read More

Aerospace Science and Technology
Improving the Reliability of GPS and GLONASS Navigation Solution in Urban Canyons using a Tuned Kalman Filter

Ali Khavari; S. Mohammad Reza Moosavi; Amir Tabatabaee; Hadi Shahriyar Shahhosseini; Mohamad reza Mosavi

Volume 12, Issue 2 , October 2019, Pages 11-18

Abstract
  Abstract: Urban canyon is categorized as hard environment for positioning of a dynamic vehicle due to low number and also bad configuration of in-view satellites. In this paper, a tuning procedure is proposed to adjust the important factors in Kalman Filter (KF) using Genetic Algorithm (GA). The authors ...  Read More

Aerospace Science and Technology
Automatic tuning of a behavior-based guidance algorithm for formation flight of quadrotors

Ehasan Zibaei; Mohammad-Ali Amiri Atashgah; Ahmad Kalhor

Volume 12, Issue 2 , October 2019, Pages 19-33

Abstract
  This paper presents a tuned behavior-based guidance algorithm for formation flight of quadrotors. The behavior-based approach provides the basis for the simultaneous realization of different behaviors such as leader following and obstacle avoidance for a group of agents; in our case they are quadcopters. ...  Read More

Aerospace Science and Technology
Vibrational characteristics of a spinning thermally affected cylindrical shell conveying viscous fluid flow carrying spring-mass systems

Alireza Pourmoayed; keramat Malekzadeh fard

Volume 12, Issue 2 , October 2019, Pages 35-48

Abstract
  In this article, the vibrational behavior of a spinning cylindrical thick shell carrying spring- mass systems and conveying viscos fluid flow under various temperature distributions is investigated. This structure rotates about axial direction and the formulations include the coriolis and centrifugal ...  Read More

Aerospace Science and Technology
A Comparison Study on Various Finite Element Models of Riveted Lap Joint by the Use of Dynamic Model Updating

Sajjad hajirezayi; Ali nouri; Enayatollah Hosseinian

Volume 12, Issue 2 , October 2019, Pages 49-60

Abstract
  Till now, various models have been proposed in literature to simulate the behavior of riveted structures. In order to find the most accurate analytical method in modeling the dynamic behavior of riveted structures, a comparison study is performed on several of these models, in this research. For this ...  Read More

Aerospace Science and Technology
On the Design of Nonlinear Discrete-Time Adaptive Controller for damaged Airplane

Karim Dastgerdi; Farshad Pazooki; Jafar Roshanian

Volume 12, Issue 2 , October 2019, Pages 61-70

Abstract
  airplane in presence of asymmetric left-wing damaged. ‎Variations of the aerodynamic parameters, mass and ‎moments of inertia, and the center of gravity due to ‎damage are all considered in the nonlinear ‎mathematical modeling. The proposed discrete-time ‎nonlinear MRAC algorithm ...  Read More