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

Dickeson, Jeffrey J.; Rodriguez, Armando A.; Sridharan, S.; Korad, Akshay S.

doi:10.2514/6.2010-8339

Cited by 11 publications

(8 citation statements)

References 55 publications

(108 reference statements)

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“…The propulsive system design encompasses the entire undersurface of the waverider. As a result, the engine and airframe become one [36]. In a real application, the periodic flight trajectory can be designed to widen the cruise range and to save the consumed energy [12].…”

Section: Illustrative Examplementioning

confidence: 99%

Nonlinear Trajectory Controller with Improved Performances for Waveriders

2019

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This paper presents a nonlinear trajectory controller with improved performances for a general model of the waverider based on feedback linearization theory and composite nonlinear feedback (CNF) technique. First, a nonlinear controller is presented using the dynamic inversion and CNF technique for the MIMO Model, and the robust stability of the proposed controller is proved. Then, the nonlinear model is established on the basis of hypersonic aerodynamic principle, and the dynamic characteristics are analyzed accordingly, and the periodic trajectory is designed and optimized in combination with a fuel optimization problem. Furthermore, the nonlinear controller is applied to the trajectory tracking of the waverider model, and the general design steps are provided the flight controller using this nonlinear control method. Finally, an illustrative example is given to verify the effectiveness of the nonlinear controller of the waverider, and the flight performances are improved accordingly, including system stability, robustness, and tracking ability.

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Section: Illustrative Examplementioning

confidence: 99%

Nonlinear Trajectory Controller with Improved Performances for Waveriders

2019

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“…Within [32], the authors consider vehicle design based on the gap metric to simplify control of the nonlinear vehicle across the flight envelope. Within [6], the impact of elevator sizing and placement on the vehicle dynamics and control saturation is considered. In [5] the impact of the plume model on the vehicle dynamics and control is considered.…”

Section: Introduction and Overviewmentioning

confidence: 99%

“…Aero-thermo-elasticpropulsion modeling and control issues (based on a nonlinear first principles 3-DOF hypersonic model) are examined in [5][6][7][8][9][10][11][12][13][14] . Typical hypersonic vehicles exhibit a pitch-up instability due to a rearward shifted center-of-gravity (CG) and long lower forebody.…”

Section: Introduction and Overviewmentioning

confidence: 99%

Constraint enforcement and robust tube-based control for scramjet-powered hypersonic vehicles with significant uncertainties

Sridharan

Rodriguez

Dickeson

et al. 2012

2012 American Control Conference (ACC)

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This paper examines the issues involved in controlling an air-breathing hypersonic vehicle (characterized by their unstable, non-minimum phase dynamics) in the presence of significant modeling uncertainty and nonlinearities (control saturations). Modeling of the vehicle exhaust (plume) is complicated, often requiring computational fluid dynamic (CFD) simulations to capture all relevant effects. The focus of this paper is on obtaining a control law that maintains the vehicle trajectory within an acceptable tube while enforcing control constraints in the presence of modeling uncertainty. A robust domain of attraction based approach is used to generate/validate a feasible tube. The computational aspects of such an approach is examined, and the benefits of a decentralized control technique is considered. This approach is compared with other techniques such as linear matrix inequalities based controller design. These approaches are applied to a command following scenario in order to illustrate the performance of the proposed approach.

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“…Therefore, the considerations of the control-related tradeoff design will assist to impose serious compromises in both system cost and quality of overall performance for hypersonic vehicles [6]. In particular, the influence of elevator size and placement on control-relevant static properties and dynamic properties are analyzed in [7], and the resulting investigation shows the trade-off design is required in relation to saturation constraints. Beyond this, the modelling and analysis framework is given for the trade-off design in [8], and a suite of integrated multidisciplinary modelling tools is developed to contribute to the control-relevant analysis and design for hypersonic vehicles to maximize overall stability and performance.…”

Section: Introductionmentioning

confidence: 99%

Collaborative Deformation Design Using Control Integrated Analysis Methods for Hypersonic Waverider

Liu

2015

International Journal of Aerospace Engineering

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Hypersonic waveriders have a large flight envelope, leading to the difficulty in keeping overall flight stability for a fixed geometry. Accordingly, hypersonic waveriders can be considered to design as a morphing vehicle such that the flight range is expanded for waveriding stability. To this end, this paper investigates the collaborative deformation design using control integrated analysis methods for the hypersonic waverider. Firstly, a parametric model is applied to combine the shape deformation with the geometrical properties. Secondly, the morphing process with regard to the change in a single geometric parameter and the static and dynamic characteristics affected by this deformation are analyzed. Afterwards, the collaborative relations are discussed for the changes in the lower forebody angle and elevon area. Furthermore, a flight control law is designed to guarantee flight stability while implementing the collaborative deformation, and the morphing results are evaluated based on the control-oriented idea. Finally, a simulation example is used to verify the effectiveness of the proposed methods for the hypersonic waverider.

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

Cited by 11 publications

References 55 publications

Nonlinear Trajectory Controller with Improved Performances for Waveriders

Nonlinear Trajectory Controller with Improved Performances for Waveriders

Constraint enforcement and robust tube-based control for scramjet-powered hypersonic vehicles with significant uncertainties

Collaborative Deformation Design Using Control Integrated Analysis Methods for Hypersonic Waverider

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