Accession Number:

AD0679992

Title:

NUMERICAL SIMULATION OF THE ATTITUDE EQUATIONS OF A SATELLITE CONTAINING DAMPING ROTORS AND A REACTION WHEEL

Descriptive Note:

Technical note

Corporate Author:

MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB

Personal Author(s):

Report Date:

1968-11-15

Pagination or Media Count:

48.0

Abstract:

This report describes a program for simulating the motion of a rigid body containing a reaction wheel, damping media and torquing magnetic or otherwise. The dynamical equations are simulated in terms of the angular velocities in body-fixed coordinates and the kinematic equations are simulated in terms of direction cosines. The entire system of equations has been programmed using a fourth order predictor-corrector method with automatic step- size adjustment and a fourth order Runge-Kutta starting routine. The ratio of computer time to real time is between 1 to 10 and 2 to 1 for LES-5-type satellites.

Subject Categories:

  • Unmanned Spacecraft

Distribution Statement:

APPROVED FOR PUBLIC RELEASE