Robust control of hypersonic vehicles considering propulsive and aeroelastic effects

Buschek, Harald; Calise, Anthony J.

doi:10.2514/6.1993-3762

Cited by 27 publications

(7 citation statements)

References 9 publications

(4 reference statements)

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“…This paper focuses on control challenges associated with scramjet-powered hypersonic vehicles. Such vehicles are characterized by significant aerothermo-elastic-propulsion interactions and uncertainty [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] .…”

Section: Motivationmentioning

confidence: 99%

Elevator Sizing, Placement, and Control-Relevant Tradeoffs for Hypersonic Vehicles

Dickeson

Rodriguez

Sridharan

et al. 2010

AIAA Guidance, Navigation, and Control Conference

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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. The impact of elevator size and placement 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. Elevator usage has been examine for a class of typical hypersonic trajectories.

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Section: Motivationmentioning

confidence: 99%

Elevator Sizing, Placement, and Control-Relevant Tradeoffs for Hypersonic Vehicles

Dickeson

Rodriguez

Sridharan

et al. 2010

AIAA Guidance, Navigation, and Control Conference

View full text Add to dashboard Cite

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. The impact of elevator size and placement 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. Elevator usage has been examine for a class of typical hypersonic trajectories.

show abstract

Section: Motivationmentioning

confidence: 99%

Control-Relevant Modeling, Analysis, and Design for Scramjet-Powered Hypersonic Vehicles

Rodriguez

Dickeson

Sridharan

et al. 2009

16th AIAA/DLR/DGLR International Space Planes and Hypersonic Systems and Technologies Conference

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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 controlcentric 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.

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“…The e ect of aerodynamic heating on control system design and achievable robust performance is investigated in Ref. 3]. The uncertainty model for aeroelastic deformation is labeled \uncertainty 2" in Fig.…”

Section: Uncertainty Modelingmentioning

confidence: 99%

Hypersonic flight control system design using fixed order robust controllers

Buschek¹,

Calise²

1995

International Aerospace Planes and Hypersonics Technologies

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Control system design for hypersonic vehicles will be complicated by coupling e ects between aerodynamics, propulsion, and structure. Using H 1 and-synthesis techniques, these features can be modeled as uncertainties and incorporated into the design procedure of a ight c o n trol system. However, modern control theory techniques generally lead to high order controllers. A technique to constrain controller dimension a priori in the design process is used to design xed order controllers which are robust to mixed real/complex uncertainties. Typical hypersonic e ects like propulsion system perturbations and aeroelastic fuselage bending are modeled as uncertainties in a robust control design framework.

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Robust control of hypersonic vehicles considering propulsive and aeroelastic effects

Cited by 27 publications

References 9 publications

Elevator Sizing, Placement, and Control-Relevant Tradeoffs for Hypersonic Vehicles

Elevator Sizing, Placement, and Control-Relevant Tradeoffs for Hypersonic Vehicles

Control-Relevant Modeling, Analysis, and Design for Scramjet-Powered Hypersonic Vehicles

Hypersonic flight control system design using fixed order robust controllers

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