Accession Number:

AD0673517

Title:

DIGITAL AND HYBRID SIMULATION OF AN ORBITAL AND REENTRY VEHICLE.

Descriptive Note:

Final rept. Jun 65-Feb 67,

Corporate Author:

RCA SERVICE CO CAMDEN N J

Personal Author(s):

Report Date:

1968-05-01

Pagination or Media Count:

147.0

Abstract:

The report documents research on techniques and components that may be used to efficiently simulate an orbital and reentry vehicle with a digital or a hybrid computer system. A mathematical model based on a Gemini-type spacecraft is defined. The spacecraft model was simulated with three separate programs 1 A digital program running at a single iteration rate for all parts of the simulation. 2 A digital program that operates with four concurrent iteration rates. Each iteration rate is associated with a grouping of the functions of the spacecraft model having similar frequencies. The higher frequency groups operate with the faster iteration rates. 3 A hybrid program that simulated the spacecraft with digital and analog equipment. Four photoresitive 8 common product multipliers were constructed to increase the computation capabilities of analog equipment. A study of techniques of function generation and program debugging is presented. The question of floating point versus fixed point programming for simulation is discussed. Author

Subject Categories:

  • Computer Programming and Software
  • Computer Hardware
  • Test Facilities, Equipment and Methods
  • Manned Spacecraft

Distribution Statement:

APPROVED FOR PUBLIC RELEASE