Aerospace Science and Technology
Analysis and Comparison of Fuzzy PID Controller Performance in Time and Frequency domain For a Stabilized Pitch-Yaw Gimbal

Amir Moghtadaei Rad

Volume 16, Issue 1 , June 2023, , Pages 1-15

https://doi.org/10.22034/jast.2023.377460.1140

Abstract
  In this article, a complete model including cross-coupling of azimuth and elevation axes, the effect of axis friction, non-perpendicularity and imbalance of axes was implemented for the platform with two degrees of freedom. Since this model includes 3 loops of current, stability and tracking from the ...  Read More

Aerospace Science and Technology
Reducing inertial navigation error using Tightly coupled integrated INS/GPS Structure

Amir Moghtadaei Rad

Volume 15, Issue 2 , October 2022, , Pages 47-60

https://doi.org/10.22034/jast.2022.306926.1099

Abstract
  Inertial navigation amplifies the noise of the input sensors over time due to the presence of an integrator in the output path to determine the position and attitude of the object. This system has high bandwidth and good short-term accuracy. On the other hand, GPS navigation has low bandwidth, low noise ...  Read More

Practical Evaluation of EKF1 and UKF2 Filters for Terrain Aided Navigation

A. Moghtadaei Rad

Volume 9, Issue 1 , March 2012

Abstract
  This article would study batch and recursive methods that used in terrain navigation systems. Terrain navigation has a lot ofdisadvantages and so researchers have been studied on different method of aided navigation for many years. Therefore, more types of aided navigation systems were introduced with ...  Read More