Annex E. International Armaments Strategy
Army Science and Technology Master Plan (ASTMP 1997)

3. Stability and Control Analysis (Germany)

Description: There are two different identification techniques used for flight test data in stability and control analysis: a frequency-domain method (predominantly used in the United States) and a time-domain technique (predominantly used in Germany). Results obtained clearly demonstrate that each of these techniques has its inherent advantages and disadvantages. Stability and control analysis directly impacts on modeling, simulation, flight control system design, and implementation of higher harmonic studies. The fidelity and accuracy of all rotorcraft modeling and simulation is directly related to the state of the art regarding stability and control analysis.

Justification: A coordinated approach combining the strengths of both techniques yields the most promising path to successfully detailing complete and accurate portrayal of flight control system design parameters and subsequent performance. This provides a critical technology link bridging theoretical design techniques, prediction, simulation, and test analysis. This work directly supports JTR, RAH-66 Comanche, AH-64 Enhanced Apache, and the construction and evaluation of simulation modeling tools.

Implementation: Stability and Control Analysis is a task outlined under a current U.S.-GE MOU with specific schedule and goals.


Dr. Rodney Smith
Army Materiel Command
5001 Eisenhower Blvd
Alexandria, VA 22333-0001


Mr. Tom Devereux
St. Louis, MO 63120-1798
e-mail: None provided