NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Hubble Space Telescope Angular Velocity Estimation During the Robotic Servicing MissionIn 2004 NASA began investigation of a robotic servicing mission for the Hubble Space Telescope (HST). Such a mission would require estimates of the HST attitude and rates in order to achieve a capture by the proposed Hubble robotic vehicle (HRV). HRV was to be equipped with vision-based sensors, capable of estimating the relative attitude between HST and HRV. The inertial HST attitude is derived from the measured relative attitude and the HRV computed inertial attitude. However, the relative rate between HST and HRV cannot be measured directly. Therefore, the HST rate with respect to inertial space is not known. Two approaches are developed to estimate the HST rates. Both methods utilize the measured relative attitude and the HRV inertial attitude and rates. First, a non-linear estimator is developed. The nonlinear approach estimates the HST rate through an estimation of the inertial angular momentum. Second, a linearized approach is developed. The linearized approach is a pseudo-linear Kalman filter. Simulation test results for both methods are given. Even though the development began as an application for the HST robotic servicing mission, the methods presented are applicable to any rendezvous/capture mission involving a non-cooperative target spacecraft.
Document ID
20050210231
Acquisition Source
Goddard Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Thienel, Julie K.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Queen, Steven Z.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
VanEepoel, John M.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Sanner, Robert M.
(Maryland Univ. College Park, MD, United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 2005
Subject Category
Aeronautics (General)
Meeting Information
Meeting: AIAA Guidance, Navigation and Control Conference and Exhibit
Location: San Francisco, CA
Country: United States
Start Date: August 15, 2005
End Date: August 18, 2005
Sponsors: American Inst. of Aeronautics and Astronautics
Distribution Limits
Public
Copyright
Public Use Permitted.
No Preview Available