26 citations · 30 across the 8 of their papers we have counts for
8 papers
Conserved Quantities of Optimal Continuous-Thrust Trajectories in A Central Gravitational Field
Aimar Negrete, Ossama Abdelkhalik
This paper presents a mathematical derivation for three new conserved quantities in the motion of spacecraft on optimal continuous-thrust trajectories in a central gravitational fi…
Minimum Effort Control Using Variational Methods of Analytical Mechanics A New Approach For Optimal Control
Ossama Abdelkhalik, Aimar Negrete
Modern optimal control theory involves adjoining the already known equations of motion of a dynamic system to the objective function using dynamic costates; this is done in order t…
Hybrid Wave-wind System Power Optimisation Using Effective Ensemble Covariance Matrix Adaptation Evolutionary Algorithm
Mehdi Neshat, Nataliia Y. Sergiienko, Leandro S. P. da Silva +4
Floating hybrid wind-wave systems combine offshore wind platforms with wave energy converters (WECs) to create cost-effective and reliable energy solutions. Adequately designed and…
Low Thrust Trajectory Design Using A Semi-Analytic Approach
Madhusudan Vijayakumar, Ossama Abdelkhalik
Space missions that use low-thrust propulsion technology are becoming increasingly popular since they utilize propellant more efficiently and thus reduce mission costs. However, op…
Sub-Optimal Fast Fourier Series Approximation for Initial Trajectory Design
Caleb Gunsaulus, Carl De Vries, William Brown +3
The Finite Fourier Series (FFS) Shape-Based (SB) trajectory approximation method has been used to rapidly generate initial trajectories that satisfy the dynamics, trajectory bounda…
Design of Initial Guess Low Thrust Trajectories Using Clohessy-Wiltshire Equations
Madhusudan Vijayakumar, William Skamser, Ossama Abdelkhalik
The commercial interest in producing low-cost space missions by exploiting the superior propellant management of low-thrust propulsion technology has become increasingly popular. T…
Dynamic modeling of the motions of variable-shape wave energy converters
Mohamed A. Shabara, Ossama Abdelkhalik
In the recently introduced Variable-Shape heaving wave energy converters, the buoy changes its shape actively in response to changing incident waves. In this study, a Lagrangian ap…
Dynamic Modeling Of Spherical Variable-Shape Wave Energy Converters
Mohamed A. Shabara, Ossama Abdelkhalik
In the recently introduced Variable-Shape heaving wave energy converters, the buoy changes its shape in response to changing incident waves actively. In this study, the dynamic mod…