Control synthesis for flexible space structures excited by persistent disturbances

Wie, Bong; Gonzalez, Marcelo

doi:10.2514/3.20803

Cited by 36 publications

(18 citation statements)

References 4 publications

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“…Studies of both filters on linear system models have been reported (Ref. [19][20] (DRF) and (Ref. 27) (DDRF), and results validate the linear system theory as expected.…”

Section: Naval Postgraduate School's Three-axis Simulator (Tas) Asupporting

confidence: 54%

“…Note that the damping terms in that filter were not related to the actual disturbance damping, but were used to tune the system. Finally, note that for disturbances of several frequencies, dipoles may be included for each frequency 19 .…”

Section: A Internal Model Principlementioning

confidence: 99%

“…2 does not include a numerator, a numerator with the same order as the denominator should be chosen to ensure a zero for every pole in the DRF root locus 19,20 . To derive the traditional DRF, first consider a persistent periodic disturbance of a single frequency, which can be represented in the time domain as:…”

Section: A Internal Model Principlementioning

confidence: 99%

“…24. The z ω selected for both filters follows the guideline of being between two consecutive poles 19 . The z ω is placed between one of the plant poles at the origin and the DRF's or DDRF's pole.…”

Section: Effect Of Drf and Ddrf In Tas Non Linear Modelmentioning

confidence: 99%

“…The DRF is based on the internal model principle (Ref. [18][19][20] and its attenuation effectiveness has been shown in a simulation of the Hubble Space Telescope 21 and in simulations for a general spacecraft with control moment gyroscopes (e.g. Ref.…”

Section: Figure 1 Naval Postgraduate School's Three-axis Simulator (mentioning

confidence: 99%

See 4 more Smart Citations

Disturbance Filtering and Identification on the Naval Postgraduate School 3-Axis Spacecraft Simulator

Lau

Joshi

Agrawal

et al. 2005

AIAA Guidance, Navigation, and Control Conference and Exhibit

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This paper investigates spacecraft disturbance rejection filtering for both persistent and decaying disturbances. The current study both validates the previously developed "dipole" disturbance rejection filter on a realistic non-linear spacecraft model, and extends the results to a new class of decaying disturbances. Although not designed specifically for decaying disturbances, prior investigations have demonstrated that the traditional "dipole" disturbance rejection filter attenuates both persistent periodic disturbances and decaying disturbances. Here we introduce a new filter which we call the decaying disturbance rejection filter, which has greater attenuation than the traditional filter for decaying disturbances. The new filter is also based on the internal model principle like the traditional filter. Also, it is shown that both the traditional and the new filter are not robust to frequency uncertainty. As a result, new closed-loop system identification methods are introduced to experimentally identify the disturbance frequency to be used within the filter design for both filter types.

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“…Studies of both filters on linear system models have been reported (Ref. [19][20] (DRF) and (Ref. 27) (DDRF), and results validate the linear system theory as expected.…”

Section: Naval Postgraduate School's Three-axis Simulator (Tas) Asupporting

confidence: 54%

Section: A Internal Model Principlementioning

confidence: 99%

Section: A Internal Model Principlementioning

confidence: 99%

Section: Effect Of Drf and Ddrf In Tas Non Linear Modelmentioning

confidence: 99%