Nonlinear Control to Maneuver Two Craft Coulomb Formation at Libration Poınts

The dynamic analysis of a two-spacecraft Coulomb formation at Earth-Moon libration points is addressed. Relative motion control of the two craft coulomb formation are used to keep the distance between them at the desired value. Formation attitude control is realized using low thrust propulsion. The present study utilizes nonlinear controllers for orbit radial, along track, and orbit normal stabilization and tracking control of a two-craft Coulomb formation at Earth–Moon collinear libration points. The nonlinear control is realized using State Dependent Riccati Equation (SDRE), and Approximating Sequence of Riccati Equations (ASRE) methods. To this end the equations of motion of the formation is properly manipulated to obtain a suitable State Dependent Coefficient (SDC) form for control. The effectiveness of the controllers are demonstrated through numerical simulations at collinear libration points, showing the capability of the approaches for formation control.
AIAA scittech 2015 konferansı, (5 - 09 Ocak 2015)


Quantum information entropies of the eigenstates of the Morse potential
Aydiner, Ekrem; Orta, Cenk; Sever, Ramazan (World Scientific Pub Co Pte Lt, 2008-01-30)
The position and momentum space information entropies for the Morse potential are numerically obtained for different strengths of the potential. It is found to satisfy the bound obtained by Beckner, Bialynicki-Birula, and Mycielski. Interesting features of the entropy densities are graphically demonstrated.
TANRIKULU, O; KURAN, B; Özgüven, Hasan Nevzat; IMREGUN, M (1993-07-01)
The dynamic response of multiple-degree-of-freedom nonlinear structures is usually determined by numerical integration of the equations of motion, an approach which is computationally very expensive for steady-state response analysis of large structures. In this paper, an alternative semianalytical quasilinear method based on the describing function formulation is proposed for the harmonic response analysis of structures with symmetrical nonlinearities. The equations of motion are converted to a set of nonl...
IDER, SK (1996-01-03)
In this paper inverse dynamics of redundant multibody systems using a minimum number of control forces is formulated. It is shown that the control forces and the task accelerations may become noncausal at certain configurations, yielding the dynamical equation set of the system to be singular. For a given set of tasks, each different set of actuators leads to a different system motion and also to different singular configurations. To avoid the singularities in the numerical solution, the dynamical equations...
Nonlinear Dynamic Inversion Autopilot Design for an Air Defense System with Aerodynamic and Thrust Vector Control
Bıyıklı, Rabiya; Yavrucuk, İlkay; Tekin, Raziye; Department of Aerospace Engineering (2022-2)
The study proposes complete attitude and acceleration autopilots in all three channels of a highly agile air defense missile by utilizing a subcategory of nonlinear feedback linearization methods Nonlinear Dynamic Inversion (NDI). The autopilot design includes cross-coupling effects enabling bank-to-turn (BTT) maneuvers and a rarely touched topic of control in the boost phase with hybrid control which consists of both aerodynamic fin control and thrust vector control. This piece of work suggests solut...
State Dependent Riccati Equation Control of Spinning Three Craft Coulomb Formations
Tekinalp, Ozan (null; 2015-01-12)
The relative position control of a collinear spinning three-spacecraft Coulomb formation with set charges is addressed. Such a formation is assumed to be in deep space without relevant gravitational forces present. The nonlinear control is realized through state dependent Riccati equation (SDRE) control method. Relative position control is used to keep a three-craft Coulomb formation about a desired equilibrium collinear configuration. The equations of motion of the formation are properly manipulated to obt...
Citation Formats
O. Tekinalp, “Nonlinear Control to Maneuver Two Craft Coulomb Formation at Libration Poınts,” presented at the AIAA scittech 2015 konferansı, (5 - 09 Ocak 2015), Florida, Amerika Birleşik Devletleri, 2015, Accessed: 00, 2021. [Online]. Available: