Control-relevant modeling, analysis, and design for scramjet-powered hypersonic vehicles

Armando Rodriguez, Jeffrey J. Dickeson, Srikanth Sridharan, Akshay Korad, Jaidev Khatri, Jose Benavides, Don Soloway, Atul Kelkar, Jerald M. Vogel

Research output: Chapter in Book/Report/Conference proceedingConference contribution

33 Scopus citations

Abstract

Within this paper, control-relevant vehicle design concepts are examined using a widely used 3 DOF (plus flexibility) nonlinear model for the longitudinal dynamics of a generic carrot-shaped scramjet powered hypersonic vehicle. Trade studies associated with vehicle/engine parameters are examined. The impact of parameters on control-relevant static properties (e.g. level-flight trimmable region, trim controls, AOA, thrust margin) and dynamic properties (e.g. instability and right half plane zero associated with flight path angle) are examined. Specific parameters considered include: inlet height, diffuser area ratio, lower forebody compression ramp inclination angle, engine location, center of gravity, and mass. Vehicle optimizations is also examined. Both static and dynamic considerations are addressed. The gap-metric optimized vehicle is obtained to illustrate how this control-centric concept can be used to "reduce" scheduling requirements for the final control system. A classic inner-outer loop control architecture and methodology is used to shed light on how specific vehicle/engine design parameter selections impact control system design. In short, the work represents an important first step toward revealing fundamental tradeoffs and systematically treating control-relevant vehicle design.

Original languageEnglish (US)
Title of host publication16th AIAA/DLR/DGLR International Space Planes and Hypersonic Systems and Technologies Conference
StatePublished - Dec 1 2009
Event16th AIAA/DLR/DGLR International Space Planes and Hypersonic Systems and Technologies Conference - Bremen, Germany
Duration: Oct 19 2009Oct 22 2009

Publication series

Name16th AIAA/DLR/DGLR International Space Planes and Hypersonic Systems and Technologies Conference

Other

Other16th AIAA/DLR/DGLR International Space Planes and Hypersonic Systems and Technologies Conference
CountryGermany
CityBremen
Period10/19/0910/22/09

ASJC Scopus subject areas

  • Engineering(all)

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    Rodriguez, A., Dickeson, J. J., Sridharan, S., Korad, A., Khatri, J., Benavides, J., Soloway, D., Kelkar, A., & Vogel, J. M. (2009). Control-relevant modeling, analysis, and design for scramjet-powered hypersonic vehicles. In 16th AIAA/DLR/DGLR International Space Planes and Hypersonic Systems and Technologies Conference [2009-7287] (16th AIAA/DLR/DGLR International Space Planes and Hypersonic Systems and Technologies Conference).