Spacecraft Attitude Control: A Consideration of Thrust Uncertainty

Golpashin, Alen E.; Yeong, Hoong C.; Ho, Koki; Namachchivaya, N. Sri

Title:

Spacecraft Attitude Control: A Consideration of Thrust Uncertainty

dc.contributor.author	Golpashin, Alen E.
dc.contributor.author	Yeong, Hoong C.
dc.contributor.author	Ho, Koki
dc.contributor.author	Namachchivaya, N. Sri
dc.contributor.corporatename	Loyola University Chicago. Department of Mathematics	en_US
dc.contributor.corporatename	University of Illinois, Urbana-Champaign. Department of Aerospace Engineering	en_US
dc.contributor.corporatename	Georgia Institute of Technology. School of Aerospace Engineering	en_US
dc.contributor.corporatename	University of Waterloo. Department of Applied Mathematics	en_US
dc.date.accessioned	2022-06-16T14:42:21Z
dc.date.available	2022-06-16T14:42:21Z
dc.date.issued	2020-09
dc.description	© AIAA	en_US
dc.description.abstract	To account for torque disturbances, and control trajectory error, a model of spacecraft attitude system is presented which replicates uncertainty in the class of continuous low-thrust systems. The generated uncertainty from each thruster is modeled as a Gaussian white noise process, multiplicative in control. An optimal stochastic control law is derived for precision pointing and three-axis stabilization. To derive the optimal control, a Hamilton-Jacobi-Bellman equation is formulated, and a power series-based method is employed to approximate the optimal control. The derived nonlinear control minimizes the objective function of the Lagrange problem in an infinite horizon setting. Stability and existence conditions of control are provided. The nonlinear stochastic optimal controller is compared to its deterministic counterpart for a 6U CubeSat model.	en_US
dc.description.sponsorship	The authors acknowledge the support of the AFOSR under Grant Number FA9550-17-1-0001.	en_US
dc.identifier.citation	A. Golpashin, H. Yeong, K. Ho, and N. Namachchivaya, “Spacecraft Attitude Control: A Consideration of Thrust Uncertainty,” Journal of Guidance, Control, and Dynamics, Vol. 43, No. 12, pp. 2349-2365, 2020. DOI: 10.2514/1.G005280	en_US
dc.identifier.doi	https://arc.aiaa.org/doi/10.2514/1.G005280	en_US
dc.identifier.uri	http://hdl.handle.net/1853/66794
dc.title	Spacecraft Attitude Control: A Consideration of Thrust Uncertainty	en_US
dc.type	Text
dc.type.genre	Post-print
dspace.entity.type	Publication
local.contributor.author	Ho, Koki
local.contributor.corporatename	Daniel Guggenheim School of Aerospace Engineering
relation.isAuthorOfPublication	399ff8cd-3094-43c0-bc84-9071801e7ebf
relation.isOrgUnitOfPublication	a348b767-ea7e-4789-af1f-1f1d5925fb65