Aerospace Science and Technology
Guidance law design for the final stage of the orbit injection problem

Morteza Sharafi; Mahdi Jafari; mojtaba alavipour

Volume 16, Issue 2 , October 2023, , Pages 61-73

https://doi.org/10.22034/jast.2023.388139.1145

Abstract
  In this paper, optimal guidance law design considering fixed final state and time for the final phase a spacecraft or launch vehicle is investigated and studied. This guidance law, not only satisfied a specific optimality criterion, but it also has the least sensitivity to the initial state’s deviations; ...  Read More

Aerospace Science and Technology
Designing the Nonlinear Guidance Law Adaptable to Initial Deviations for the Vertical Landing of the Booster

Morteza Sharafi; Nasser Rahbar; Ali Moharrampour; Abdorreza Kashaninia

Volume 15, Issue 1 , June 2022, , Pages 14-25

https://doi.org/10.22034/jast.2022.327899.1113

Abstract
  This study proposes a new non-linear guidance law for a Falcon 9 missile booster landing's terminal phase using a non-linear vectorized high expansion method. For this purpose, At first, the dynamic modeling of the landing problem is presented, assuming mass, gravity, and density are variables. Then, ...  Read More

Aerospace Science and Technology
Noise-Induced Miss Distance Analysis of First-Order Explicit Guidance Law

Ali Arabian Arani; S.H. Jalali Naini; Mohammad Hossein Hamidi Nejad

Volume 15, Issue 1 , June 2022, , Pages 129-138

https://doi.org/10.22034/jast.2022.303074.1095

Abstract
  This study presents the miss distance analysis of the first-order explicit guidance law due to seeker noise using the adjoint method. For this purpose, linearized equations are utillized and the adjoint model is developed. Then the first-order equations are obtained and converted into nondimensional ...  Read More