2026-09-20T01:26:12Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/104940 2023-07-11 col_2142_5131 col_2142_14800 com_2142_5130 com_2142_14799 com_2142_234

Ho, Koki Silva, Tiago Marrs 2019-08-23T20:05:22Z 2019-08-23T20:05:22Z 2019-04-26 2019-05 Increasing interest in asteroid mining and in-situ resource utilization will lead to an increase in asteroid surface operations. The composition of asteroids is often unknown and potentially unstable, many of which are bound together predominantly by gravitational forces. Surface operations such as mining may significantly alter the asteroid’s structure or, in the case of contact binary asteroids, cause the asteroid to split. Conditions on the evolution of the contact binary system after splitting are derived. Observability issues causing inconclusive results in the previous work were addressed here by identifying an observable set of constant parameters which describes the splitting system. The coupled problem of estimating unknown parameters of a newly-formed binary system and controlling a spacecraft’s trajectory in the system’s vicinity is investigated. An indirect adaptive control scheme is utilized to simultaneously and accurately meet both objectives. Finally, a simpler control scheme, based only on 2-body dynamics is derived to show significant improvement in performance when using the proposed adaptive control scheme over using the simple 2-body controller. For larger contact binary asteroids, the adaptive control scheme has shown up to a 20% reduction in control cost over the 2-body controller. Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2019-08-22 without embargo terms The student, Tiago Silva, accepted the attached license on 2019-04-25 at 14:30. The student, Tiago Silva, submitted this Thesis for approval on 2019-04-25 at 14:48. This Thesis was approved for publication on 2019-04-26 at 13:42. DSpace SAF Submission Ingestion Package generated from Vireo submission #13921 on 2019-08-22 at 14:46:50 Made available in DSpace on 2019-08-23T20:05:22Z (GMT). No. of bitstreams: 2 SILVA-THESIS-2019.pdf: 6819049 bytes, checksum: a5f27c6fb54f133d3a5ef2fd005bc033 (MD5) LICENSE.txt: 4208 bytes, checksum: 3cf3ad5b921e96240061bea9b757a4a9 (MD5) Previous issue date: 2019-04-26 application/pdf http://hdl.handle.net/2142/104940 en Copyright 2019 Tiago Silva Indirect Adaptive Control Spacecraft Trajectory Tracking Kalman Filter Parameter Estimation Contact Binary Asteroids LQR Control Spacecraft trajectory tracking and parameter estimation in the presence of a splitting contact binary asteroid text text Aerospace Engineering Aerospace Engineering University of Illinois at Urbana-Champaign Thesis M.S.