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