Vibration Reduction in Flexible Space Structures Using Input Shaping on MACE: Mission Results

Abstract The performance of many spacecraft can be improved by using closed-loop control and command-shaping techniques. However, since little information exists about the operation of controlled structures in zerogravity, it is difficult for designers to anticipate and place confidence in the on-orbit performance of their ground based control designs. To address this issue, the Middeck Active Control Experiment (MACE) was conducted aboard the Space Shuttle Endeavor in March of 1995. This paper presents the results of the command shaping experiments implemented during the mission and proposes guidelines for using command shaping to suppress unwanted vibration in flexible space structures.

[1]  Warren P. Seering,et al.  A zero-placement technique for designing shaped inputs to suppress multiple-mode vibration , 1994, Proceedings of 1994 American Control Conference - ACC '94.

[2]  R. L. Farrenkopf Optimal Open-Loop Maneuver Profiles for Flexible Spacecraft , 1979 .

[3]  Warren P. Seering,et al.  Vibration reduction in 0-g using input shaping on the MIT Middeck Active Control Experiment , 1995, Proceedings of 1995 American Control Conference - ACC'95.

[4]  William Singhose,et al.  EXTRA-INSENSITIVE INPUT SHAPERS FOR CONTROLLING FLEXIBLE SPACECRAFT , 1996 .

[5]  Warren P. Seering,et al.  Preshaping Command Inputs to Reduce System Vibration , 1990 .

[6]  Edward F. Crawley,et al.  MACE: Anatomy of a Modern Control Experiment , 1996 .

[7]  J. Junkins,et al.  Optimal Large-Angle Single-Axis Rotational Maneuvers of Flexible Spacecraft , 1980 .

[8]  Jonathan P. How,et al.  Overview of Closed Loop Results for MACE , 1996 .

[9]  Qiang Liu,et al.  Robust time-optimal control of uncertain structural dynamic systems , 1993 .

[10]  Roger M. Glaese,et al.  On-Orbit Modeling and Identification for MACE , 1996 .

[11]  Warren P. Seering,et al.  An extension of command shaping methods for controlling residual vibration using frequency sampling , 1992, Proceedings 1992 IEEE International Conference on Robotics and Automation.

[12]  Kenneth W. Chang Shaping Inputs to Reduce Vibration in Flexible Space Structures , 1992 .

[13]  C. Swigert Shaped Torque Techniques , 1980 .

[14]  Warren P. Seering,et al.  Residual Vibration Reduction Using Vector Diagrams to Generate Shaped Inputs , 1994 .