Accession Number:

AD0668141

Title:

A DESCRIPTION OF THE DIGITAL ATTITUDE SIMULATION.

Descriptive Note:

Technical memo.,

Corporate Author:

JOHNS HOPKINS UNIV SILVER SPRING MD APPLIED PHYSICS LAB

Personal Author(s):

Report Date:

1968-02-01

Pagination or Media Count:

130.0

Abstract:

The Digital Attitude Simulation DAS described deals with the trajectory and attitude motion of an earth-orbiting spacecraft of very general configuration. The spacecraft may have a mass distribution as a function of time and one generalized coordinate. The equations of motion are derived using Lagrangian mechanics. Perturbations owing to the higher order terms of the earths potential, radiation pressure, and earths magnetic field are described. The program can simulate the action of spin, gravity-gradient, or magnetically stabilized spacecraft. Options for using rotors, gravity-gradient booms, and a large variety of damping schemes including hysteresis, eddy current, time-lag, ball-in-ball, gimballed boom, and viscous dampers are available. Author

Subject Categories:

  • Computer Programming and Software
  • Computer Hardware
  • Unmanned Spacecraft

Distribution Statement:

APPROVED FOR PUBLIC RELEASE