Accession Number:

ADA179207

Title:

Detumbling of Two Inter-Connected Rigid Bodies Using Liapunov Methods for Feedback Control.

Descriptive Note:

Master's thesis,

Corporate Author:

AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING

Personal Author(s):

Report Date:

1986-12-01

Pagination or Media Count:

95.0

Abstract:

A satellite is modeled as two rigid bodies interconnected by a joint with one degree of freedom. In a tumbling situation, the satellite is brought to a condition of stabilized spin about its maximum moment of inertia axis. This is accomplished by a torque applied to the internal joint by an electronic motor. The control law which supplies the input to the torque motor is derived using both nonlinear and linear feedback. Liapunov stability theory is used to develop both methods. Various models are devised with varying rigid body physical properties in order to draw comparisons, and results are presented for each case. While the nonlinear control law was unsuccessful for the case presented, due to a violation in theory, the linear feedback approach produced favorable outcome for a variety of linear control law cases. Keywords Theses Attitude control Spacecraft recovery Equations of motion Computer program verification. Author

Subject Categories:

  • Astronautics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE