NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Application of digital computer APU modeling techniques to control system design.Study of the required controls for a H2-O2 auxiliary power unit (APU) technology program for the Space Shuttle. A steady-state system digital computer program was prepared and used to optimize initial system design. Analytical models of each system component were included. The program was used to solve a nineteen-dimensional problem, and then time-dependent differential equations were added to the computer program to simulate transient APU system and control. Some system parameters were considered quasi-steady-state, and others were treated as differential variables. The dynamic control analysis proceeded from initial ideal control modeling (which considered one control function and assumed the others to be ideal), stepwise through the system (adding control functions), until all of the control functions and their interactions were considered. In this way, the adequacy of the final control design over the required wide range of APU operating conditions was established.
Document ID
19730053614
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Bailey, D. A.
Burriss, W. L.
(AiResearch Manufacturing Co. Los Angeles, Calif., United States)
Date Acquired
August 7, 2013
Publication Date
January 1, 1973
Subject Category
Auxiliary Systems
Meeting Information
Meeting: Intersociety Energy Conversion Engineering Conference
Location: Philadelphia, PA
Start Date: August 13, 1973
End Date: August 16, 1973
Accession Number
73A38416
Funding Number(s)
CONTRACT_GRANT: NAS3-15708
CONTRACT_GRANT: NAS3-14408
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available