Project Title:
Eclectic, Mixed H-Infinity and Mu-Synthesis Procedures for Practical Flight-Control-System
03.03-2281A
911090
Eclectic, Mixed H-Infinity and Mu-Synthesis Procedures for Practical Flight-Control-System
Design
Systems Technology, Inc.
13766 South Hawthorne Boulevard
Hawthorne
CA
90250
Peter M.
Thompson
213-679-2281
LaRC
NAS1-19547
030
03.03-2281A
911090
Abstract:
Eclectic, Mixed H-Infinity and Mu-Synthesis Procedures for Practical Flight-Control-System
Design
Modern aerospace vehicles require highly integrated multidisciplinary control systems
and the use of numerous control effectors, including thrust vecturing. The resultant
complexities motivate a need for improved synthesis methods and a re-examination
of conventional control design criteria. The h-infinity optimal control approach
is a promising candidate because performance and robustness specifications can directly
be included in the cost function. As it now stands, h-infinity is not yet useful
for flight control design and, indeed, has as many deficiencies for such purposes
as it has promises. To overcome the major deficiencies, an eclectic and complementary
mix of control synthesis procedures that utilize h-infinity and -synthesis as core
techniques will be developed. The approach will address and rectify the deficiencies
and evolve a practical composite technique for flight control purposes. The project
will investigate the mixture of techniques and apply them to advanced stability augmentor
and autopilot designs for a high-performance, high-angle-of-attack aircraft.
The advanced practical synthesis methods developed could become universal in the
design of advanced, highly integrated, robust flight control and similar automated
systems in air, space, and ground transportation. Near-term possibilities include
experiments on the NASA HARV, or applications to the X-30 or HSCT. Some of the techniques
and procedures developed could be incorporated as upgrades in existing commercially
available software design programs ("Program CC").
h-infinity, mu-synthesis, robustness, flight control design