4 papers
Eigendecomposition Parameterization of Penalty Matrices for Enhanced Control Design: Aerospace Applications
Nicholas P. Nurre, Ehsan Taheri
Modern control algorithms require tuning of square weight/penalty matrices appearing in quadratic functions/costs to improve performance and/or stability output. Due to simplicity…
Constrained Fuel and Time Optimal 6DOF Powered Descent Guidance Using Indirect Optimization
Nicholas P. Nurre, Ehsan Taheri
Powered descent guidance (PDG) problems subject to six-degrees-of-freedom (6DOF) dynamics allow for enforcement of practical attitude constraints. However, numerical solutions to 6…
End-to-End Lyapunov-Based Eclipse-Feasible Low-Thrust Transfer Trajectories to NRHO
Nicholas P. Nurre, Ehsan Taheri
Generating low-thrust transfer trajectories between Earth and the Near Rectilinear Halo Orbit (NRHO), that is selected for NASA's Gateway, can be challenging due to the low control…
Expanding the Class of Quadratic Control-Lyapunov Functions for Low-Thrust Trajectory Optimization
Nicholas P. Nurre, Saeid Tafazzol, Ehsan Taheri
Control laws derived from Control-Lyapunov Functions (CLFs) offer an efficient way for generating near-optimal many-revolution low-thrust trajectories. A common approach to constru…