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A real-time, portable, microcomputer-based jet engine simulatorModern piloted flight simulators require detailed models of many aircraft components, such as the airframe, propulsion system, flight deck controls and instrumentation, as well as motion drive and visual display systems. The amount of computing power necessary to implement these systems can exceed that offered by dedicated mainframe computers. One approach to this problem is through the use of distributed computing, where parts of the simulation are assigned to computing subsystems, such as microcomputers. One such subsystem, such as microcomputers. One such subsystem, a real-time, portable, microcomputer-based jet engine simulator, is described in this paper. The simulator will be used at the NASA Ames Vertical Motion Simulator facility to perform calculations previously done on the facility's mainframe computer. The mainframe will continue to do all other system calculations and will interface to the engine simulator through analog I/0. The engine simulator hardware includes a 16-bit microcomputer and floating-point coprocessor. There is an 8 channel analog input board and an 8 channel analog output board. A model of a small turboshaft engine/control is coded in floating-point FORTRAN. The FORTRAN code and a data monitoring program run under the control of an assembly language real-time executive. The monitoring program allows the user to isplay and/or modify simulator variables on-line through a data terminal. A dual disk drive system is used for mass storage of programs and data. The CP/M-86 operating system provides file management and overall system control. The frame time for the simulator is 30 milliseconds, which includes all analog I/0 operations.
Document ID
19840008744
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Blech, R. A. (NASA Lewis Research Center Cleveland, OH, United States)
Soeder, J. F. (NASA Lewis Research Center Cleveland, OH, United States)
Mihaloew, J. R. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 4, 2013
Publication Date
January 1, 1984
Subject Category
Computer Operations And Hardware
Report/Patent Number
NASA-TM-83550
E-1925
NAS 1.15:83550
Meeting Information
Meeting: 1984 Simulators Mini-Conf.
Location: Norfolk, VA
Country: United States
Start Date: April 18, 1984
End Date: April 20, 1984
Sponsors: Society for Computer Simulation
Accession Number
84N16812
Funding Number(s)
PROJECT: RTOP 505-40-5B
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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