Nonlinear Control to Maneuver Two Craft Coulomb Formation at Libration Poınts

2015-01-05
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)

Suggestions

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.
FORCED HARMONIC RESPONSE ANALYSIS OF NONLINEAR STRUCTURES USING DESCRIBING FUNCTIONS
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...
STABILITY OF CONTROL FORCES IN REDUNDANT MULTIBODY SYSTEMS
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 aeroservoelastic modelling and analysis of aircraft with control surface freeplay
Yurtsever, Utku; Şahin, Melin; Kayran, Altan; Department of Aerospace Engineering (2022-11-24)
In this study, nonlinear aeroservoelastic analysis of aircraft with control surface freeplay is performed using the fictitious mass approach. For the demonstration of the nonlinear aeroservoelastic analysis methodology, an available very light aircraft (VLA) design configuration is selected. The aeroelastic model of the aircraft is obtained by combining the structural and aerodynamic models of the aircraft, which are prepared by the finite element modelling and analysis tool MSC.Patran/MSC.Nastran and the a...
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...
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: https://hdl.handle.net/11511/87923.