Closed-Loop Guidance with Final Velocity Constraint Using Time-Varying Weighting Coefficient for Shaping of Commanded Acceleration

S. H. Jalali-Naini

Volume 2, Issue 3 , December 2009, , Pages 1-12

Abstract
  In this paper, a closed-loop optimal guidance with final position and velocity constraints is obtained by applying time-varying weighting coefficient in the performance index in order to shape the commanded acceleration. The control system is assumed to be linear, time-varying, and of arbitrary order ...  Read More

Optimal Low-Thrust Spacecraft Trajectories Using Time-Domain Finite Element Method

S. A. Fazelzadeh; Gh. A. Varzandian

Volume 1, Issue 2 , December 2008, , Pages 43-50

Abstract
  In this study, optimal low-thrust spacecraft trajectories are obtained by time-domain finite element method. Equations of motion are expressed in state-space form. The performance index is considered as minimum time. The problem has been formulated through the variational approach. The time-domain finite ...  Read More