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Meeting	ACGS Committee Meeting 95 - Salt Lake City - March 2005
Agenda Location	4 GENERAL COMMITTEE TECHNICAL SESSION 4.2 Research Institutions, Industry and University Reports 4.2.1 Research Institutes and Companies 4.2.1.11 Systems Technology, Inc.
Title	Systems Technology, Inc.
Presenter	Dave Klyde
Available Downloads*	presentation
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Abstract	Under a Phase II SBIR for the Army Research Laboratory, a combined biodynamic and vehicle model is used to assess the vibration and performance of a human operator performing a driving task. This analysis requires the coordinated use of separate and mature software programs for anthropometrics, vehicle dynamics, biodynamics, and systems analysis. The total package is called AVB-DYN, an acronym for Anthropometrics, Vehicle, and Bio-DYNamics. The biodynamic component of AVB-DYN is compared with an experimental study that investigated human operator in-vehicle reaching performance using the U.S. Army TACOM Ride Motion Simulator. Classic flutter flight testing involves the evaluation of a given configuration at a stabilized test point before clearance is given to expand the envelope further. At each stabilized point flight test data are compared with computer simulation models to assess the accuracy of predicted flutter boundaries. Because of the time constraints associated with these procedures, the Air Force has been seeking methods to improve current flight test methods. An ongoing AFFTC Phase II SBIR at STI has developed a technique that provides a rapid, on-line tool for the identification of aeroservoelastic systems. The technique involves the use of discrete wavelet transforms to compute the impulse response (Markov parameters) of the estimated system. This is then used in the Eigensystem Realization Algorithm (ERA) method to compute the discretized state-space matrices. Although the method does require that the identification begin from stabilized initial conditions, it has been shown to be relatively insensitive to input forcing function. A model of a modern naval fighter aircraft was used to evaluate the capabilities of the identification method including the effects of input and output noise and gust disturbances.