A Heuristic Approach for 3D-Optimization of 3-Stage Gear Train Using PSO

Mehrdad Hoseiniasl; Javad Jafari Fesharaki

Volume 11.1, Issue 1 , June 2018, , Pages 22-30

https://doi.org/10.22034/jast.2018.145655

Abstract
  Optimization the volume/weight of the gear train is more important for industries and researchers. In this paper using particle swarm optimization algorithm a general gear train is optimized. The main idea is to optimum the volume/weight of the gearbox in 3 directions. So, the optimization process based ...  Read More

Effect of fuel injector on the performance of a gas turbine combustor

Mohammadreza Nozari; Sadegh Tabejamaat; Hasan Sadeghizade; Majid Aghayari

Volume 11.1, Issue 2 , October 2018, , Pages 30-36

https://doi.org/10.22034/jast.2018.145664

Abstract
  The influence of fuel injector on the performance parameters of a can-type combustor were examined experimentally using LPG fuel and at atmospheric conditions. The first injector is a typical 45° conical injector with 6 holes on its curved surface, and the second injector is a swirl injector with ...  Read More

Modification in Calibration of Strapdown Inertial Navigation System Due to Compensation of Inherent Error in Fixture Manufacturing

A. Abdoli; Seyed Hossein Taghavi

Volume 11.1, Issue 1 , June 2018, , Pages 31-37

https://doi.org/10.22034/jast.2018.145980

Abstract
   It is always easier to measure the deviation of a product from its design commitments, in comparison to making it identical to plan obligations. In this paper, this simple fact is utilized to compensate the inherent error of fixture fabrication by a mathematical modeling of possible sources of ...  Read More

Fast Terminal Sliding Mode Controller for a Quadrotor Unmanned Aerial Vehicle

I. Khabbazi; Vahid Behnamgol

Volume 11.1, Issue 1 , June 2018, , Pages 37-45

https://doi.org/10.22034/jast.2018.145987

Abstract
  This paper presents robust nonlinear control law for a quadrotor UAV using fast terminal sliding mode control. Fast terminal sliding mode idea is used for introducing a nonlinear sliding variable that guarantees the finite time convergence in sliding phase. Then in reaching phase for removing chattering ...  Read More

Velocity and Body Rate Control of a Spacecraft Using Robust Passivity-Based Control

H. Chenarani; T. Binazadeh; M.H Shafiei

Volume 11.1, Issue 2 , October 2018, , Pages 37-44

https://doi.org/10.22034/jast.2018.146009

Abstract
  This paper considers the problem of asymptotic stabilizing of velocity and body rates of a spacecraft in the presence of uncertainties and external disturbances. One of the important methods in controller design for nonlinear systems; is designing based on the passivity concept. This concept which provides ...  Read More

A Heuristic Approach for 3D-Optimization of 3-Stage Gear Train Using PSO
Volume 12, Issue 1 , March 2019

https://doi.org/10.22034/jast.2018.145654

Abstract
  Optimization the volume/weight of the gear train is more important for industries and researchers. In this paper using particle swarm optimization algorithm a general gear train is optimized. The main idea is to optimum the volume/weight of the gearbox in 3 directions. So, the optimization process based ...  Read More

Aerospace Science and Technology
Advancing Flexible Rope Motion Measurement in Aerospace: Vision-Based Innovations for Enhanced Accuracy and Efficiency through Edge Segmentation

Mohammad Hassan Pachenari

Articles in Press, Accepted Manuscript, Available Online from 13 February 2024

https://doi.org/10.22034/jast.2024.418390.1161

Abstract
  Flexible ropes have wide-ranging applications in aerospace engineering, yet accurately measuring their motion state without disrupting dynamic characteristics remains a challenge. This study introduces a visual measurement method aimed at precisely assessing flexible rope motion to support the development ...  Read More

Aerospace Science and Technology
A Comprehensive Miss Distance Analysis of Single-Lag True Proportional Navigation

S.H. Jalali Naini; Rahim Asadi; amir hossein Mirzaei

Volume 17, Issue 1 , June 2024

https://doi.org/10.22034/jast.2024.428886.1170

Abstract
  A complete miss distance analysis of true proportional navigation is carried out due to initial heading error, step target maneuver, and seeker noise sources assuming a first-order control system using forward and adjoint methods. For this purpose, linearized equations are utilized for deterministic ...  Read More

Aerospace Science and Technology
Experimental assessment of the air flow induced vibration of a single cylinder with a cantilever beam

Reza mahmoodpoor; amir kiyoumarsioskouei; amin taraghi; leila donyaparast

Articles in Press, Accepted Manuscript, Available Online from 29 March 2024

https://doi.org/10.22034/jast.2024.445963.1178

Abstract
  The focus on different energy harvesting methods has led to various studies on the mechanism of flow-induced vibration phenomena, including vortex-induced vibration, galloping, and wake-galloping. In this study, an experimental investigation on flow around a cylinder with an elastic cantilever beam has ...  Read More