Utilization of simulation tools in the HL-20 conceptual design processThe role of simulations in the design of the HL-20, the crew-carrying unpowered lifting-body component of the NASA Personnel Launch System, is reviewed and illustrated with drawings and diagrams. Detailed consideration is given to the overall implementation of a real-time simulation of the HL-20 approach and landing phase, the baseline and experimental control laws used in the flight-control system, autoland guidance and control laws (vertical and lateral steering), the control-surface mixer and actuator model, and simulation results. The simulations allowed identification and correction of design problems with respect to the position of the landing gear and the original maximum L/D ratio of 3.2.
Document ID
19910063215
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Jackson, E. B. (NASA Langley Research Center Hampton, VA, United States)
Powell, Richard W. (NASA Langley Research Center Hampton, VA, United States)
Ragsdale, W. A. (Unisys Corp. Hampton, VA, United States)