Show simple item record

dc.contributor.authorSong, G.
dc.contributor.authorN. Buck
dc.contributor.authorAgrawal, B.N.
dc.date.accessioned2013-07-18T19:18:19Z
dc.date.available2013-07-18T19:18:19Z
dc.date.issued1999
dc.identifier.citationAIAA Journal of Guidance, Control, and Dynamics, Vol. 22, No. 3, 1999, pp. 433-444.
dc.identifier.urihttp://hdl.handle.net/10945/34484
dc.descriptionThe article of record as published may be found at http://dx.doi.org/10.2514/2.4415en_US
dc.description.abstractMinimizing vibrations of a flexible spacecraft actuated by on-off thrusters is a challenging task. This paper presents the first study of Pulse-Width Pulse-Frequency (PWPF) modulated thruster control using command input shaping. Input shaping is a technique which uses shaped command to ensure zero residual vibration of a flexible structure. PWPF modulation is a control method which provides pseudo-linear operation for an on-off thruster. The proposed method takes full advantage of the pseudo-linear property of a PWPF modulator and integrates it with a command shaper to minimize the vibration of a flexible spacecraft induced by on-off thruster firing. Compared to other methods, this new approach has numerous advantages: 1) effectiveness in vibration suppression, 2) dependence only on modal frequency and damping, 3) robustness to variations in modal frequency and damping, 4) easy computation and 5) simple implementation. Numerical simulations performed on an eight-mode model of the Flexible Spacecraft Simulator (FSS) in the Spacecraft Research and Design Center (SRDC) at US Naval Postgraduate School (NPS) demonstrate the efficacy and robustness of the method.en_US
dc.rightsThis publication is a work of the U.S. Government as defined
in Title 17, United States Code, Section 101. As such, it is in the
public domain, and under the provisions of Title 17, United States
Code, Section 105, is not copyrighted in the U.S.en_US
dc.titleSpacecraft Vibration Reduction Using Pulse-Width Pulse-Frequency Modulated Input Shaperen_US
dc.contributor.departmentDepartment of Mechanical and Aerospace Engineering


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record