Dynamics Simulation of Pressurizing in Propulsion System Configuration

H. R. Ali Mohammadi; D. Ramesh; M. R. Heidary; R. Farrokhi; H. Karimi

Volume 6, Issue 3 , October 2013, Pages 1-13

Abstract
  In this paper, a particular propulsion system including, liquid rocket engine, fuel and oxidizer tank and related pressurizing system, have been surveyed. The procedure is based on a nonlinear mathematical model which has been simulated in Matlab Simulation environment. In propulsion systems, identifying ...  Read More

Developing a New Explicit Guidance Method for the Trajectory Correction of Sub-Orbital Modules

A. R. Alemi Naeeni; J. Roshanian

Volume 6, Issue 3 , October 2013, Pages 15-26

Abstract
  This paper presents an explicit guidance method which could be used in the problems of orbit correction for sub-orbital modules. This method is based on solving the Lambert problem. Two efficient methods of solving the Lambert problem are introduced and compared. Using of the selected method a guidance ...  Read More

Increasing Accuracy of Satellite Position Prediction with Considering Harmonics of Potential Function of the Earth

H. Bolandi; M. H. Ashtari; M. Esmaeilzadeh; M. Haghparast

Volume 6, Issue 3 , October 2013, Pages 27-37

Abstract
  In this paper predicting of position of satellite based on extended kalman filter with considering hardware implementation consideration and simultaneously maintaining desired accuracy is investigated. For this purpose, first, effective forces on orbital dynamic and nonlinear equation of orbital motion ...  Read More

Assessment of Solution of the Boundary Layer Equations and Approximate Relations for Aeroheating of Axisymmetric Reentry Vehicles

R. Kamali –Moghadam; S. Nouri; M. R. Salimi; M. Sheida; S. A. Hosseini

Volume 6, Issue 3 , October 2013, Pages 39-48

Abstract
  When a solver is used for analyzing the hypersonic reentry vehicles, high speed and accuracy of the solver results are the basic parameters in the design process. In the present study, the results obtained by solution of laminar boundary layer equations using integral matrix method and approximate method ...  Read More

Design of Round Trip Trajectories to Lunar L1

M. Jafari -Nadoushan; A. Novinzadeh

Volume 6, Issue 3 , October 2013, Pages 49-54

Abstract
  In this paper design of transfer trajectory from Earth park orbit to a halo orbit around L1 of Earth-Moon system and return trajectory from halo orbit to the Earth are investigated. Since satisfying constraints and boundary conditions at the end of trajectory is an important point in trajectory design, ...  Read More

Studying and Calculating the Radiation Damage Caused by the Solar Radiation Spectrum in the Crystal Structure of Semiconductor Components

A. Esmaeilian; S. A. H Feghhi; H. Jafari; A. Pahlavan

Volume 6, Issue 3 , October 2013, Pages 55-60

Abstract
  Space radiation environment has concerned about proper performance of electronic systems and equipment used in the space due to a variety of space radiations. The radiation hardening techniques are required to all parts of the system in such environment. Therefore careful studies should be done on the ...  Read More

Design and Simulation of Magnetic Conductors to Enhance Features of Satellite Antennas and to Reduce Effects of Space Radiation

M. Sh. Hosseinipanah; F. Abdoullah-Mianji

Volume 6, Issue 3 , October 2013, Pages 61-66

Abstract
  To improve the performance of satellite antennas, use of a high-impedance surface is purposed. High impedance surfaces are known as artificial magnetic conductors. The designed magnetic conductor includes an array of a Jerusalem Cross frequency selective surface which is connected to the ground via four ...  Read More

Design and Fabrication of Laboratory Pilot for OSL Dosimeter System for Space Applications

A. Aghaei; H. Sadeghi; H. Jahanbakhsh; R. Taheri; A. Mossavi; A.M. Niko

Volume 6, Issue 3 , October 2013, Pages 67-73

Abstract
  OSL dosimeter system was introduced first time in 1963 and it has been used for space application science 2005 by space organizations. In this work we try to design and fabricate this system in Iran for the first time .Basic physical quantum of this system is optically stimulated luminescence. This system ...  Read More