Observer-based body-frame hovering control over a tumbling asteroid

Morad Nazari; Robert Wauson; Thomas Critz; Eric A. Butcher; Daniel J. Scheeres

doi:10.1016/j.actaastro.2014.05.016

Observer-based body-frame hovering control over a tumbling asteroid

Morad Nazari, Robert Wauson, Thomas Critz, Eric A. Butcher, Daniel J. Scheeres

Research output: Contribution to journal › Article › peer-review

34 Scopus citations

Abstract

Observer-based hovering control over a tumbling asteroid in the body-fixed frame is studied. An extended Kalman filter (EKF) is used to process range measurements from a small collection of ground stations, yielding estimates of the spacecraft state vector and the gravitational parameters of the asteroid assuming a second degree and order gravity field model. The estimated states are used in the optimal feedback control algorithm which consists of two alternatives: time-varying LQR or the Lyapunov-Floquet transformation (LFT) and time-invariant LQR. The closed-loop response of the system and the control effort required are investigated and compared for both control strategies.

Original language	English (US)
Pages (from-to)	124-139
Number of pages	16
Journal	Acta Astronautica
Volume	102
DOIs	https://doi.org/10.1016/j.actaastro.2014.05.016
State	Published - 2014

Keywords

Continuous control
Extended Kalman filter
Lyapunov-Floquet transformation
Time-varying LQR
Tumbling asteroid

ASJC Scopus subject areas

Aerospace Engineering

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10.1016/j.actaastro.2014.05.016

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title = "Observer-based body-frame hovering control over a tumbling asteroid",

abstract = "Observer-based hovering control over a tumbling asteroid in the body-fixed frame is studied. An extended Kalman filter (EKF) is used to process range measurements from a small collection of ground stations, yielding estimates of the spacecraft state vector and the gravitational parameters of the asteroid assuming a second degree and order gravity field model. The estimated states are used in the optimal feedback control algorithm which consists of two alternatives: time-varying LQR or the Lyapunov-Floquet transformation (LFT) and time-invariant LQR. The closed-loop response of the system and the control effort required are investigated and compared for both control strategies.",

keywords = "Continuous control, Extended Kalman filter, Lyapunov-Floquet transformation, Time-varying LQR, Tumbling asteroid",

author = "Morad Nazari and Robert Wauson and Thomas Critz and Butcher, {Eric A.} and Scheeres, {Daniel J.}",

note = "Funding Information: The authors thank NASA for funding this research through Grant no. NNX11AQ35A . ",

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T1 - Observer-based body-frame hovering control over a tumbling asteroid

AU - Nazari, Morad

AU - Wauson, Robert

AU - Critz, Thomas

AU - Butcher, Eric A.

AU - Scheeres, Daniel J.

N1 - Funding Information: The authors thank NASA for funding this research through Grant no. NNX11AQ35A .

PY - 2014

Y1 - 2014

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AB - Observer-based hovering control over a tumbling asteroid in the body-fixed frame is studied. An extended Kalman filter (EKF) is used to process range measurements from a small collection of ground stations, yielding estimates of the spacecraft state vector and the gravitational parameters of the asteroid assuming a second degree and order gravity field model. The estimated states are used in the optimal feedback control algorithm which consists of two alternatives: time-varying LQR or the Lyapunov-Floquet transformation (LFT) and time-invariant LQR. The closed-loop response of the system and the control effort required are investigated and compared for both control strategies.

KW - Continuous control

KW - Extended Kalman filter

KW - Lyapunov-Floquet transformation

KW - Time-varying LQR

KW - Tumbling asteroid

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Observer-based body-frame hovering control over a tumbling asteroid

Abstract

Keywords

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