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An overview on dynamics and controls modelling of hypersonic vehicles

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TLDR
This paper discusses the areas that are important to realizing a hypersonic modelling approach that can take any given vehicle geometry and permit a thorough analysis of its stability and control characteristics and any practical constraints on its operability, the design of a control law, an assessment of it closed-loop performance.
Abstract
In order to appropriately design control laws for hypersonic vehicles, it is paramount to understand how the flight dynamics are impacted by the interactions between the aerothermodynamics, propulsion system, structural dynamics, and control system. To this end, there has been a significant investment into the modelling of these sub-systems and their integration into a comprehensive model that can be used to the characterize the flight dynamics of scramjet-powered hypersonic aircraft and still remain amenable to control law design and analysis. In this paper, the development of a comprehensive model of the longitudinal dynamics of generic hypersonic vehicle with an outward-turning, two-dimensional inlet is described. The sub-system models, for the most part, are simple models derived from first-principles and are intended to capture the interactions between the different sub-systems to provide a representative vehicle model. We also will discuss the areas that are important to realizing a hypersonic modelling approach that can take any given vehicle geometry and permit a thorough analysis of its stability and control characteristics and any practical constraints on its operability, the design of a control law, an assessment of it closed-loop performance.

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Quasi-continuous high-order sliding mode controller and observer design for flexible hypersonic vehicle☆

TL;DR: In this article, a control-oriented uncertainty model is established for the feedback linearization design, and the multi-input and multi-output (MIMO) quasi-continuous high-order sliding mode (HOSM) controller is formulated to track the responses of the vehicle to a step change in velocity and altitude based on full state feedback.
Journal ArticleDOI

Continuous high order sliding mode controller design for a flexible air-breathing hypersonic vehicle.

TL;DR: An Input-Output linearization model is constructed for the purpose of feedback control design and a nonlinear disturbance observer is applied to estimate the uncertainties in order to compensate the controller and disturbance suppression, where disturbance observer and controller synthesis design is obtained.
Journal ArticleDOI

Adaptive high-order dynamic sliding mode control for a flexible air-breathing hypersonic vehicle

TL;DR: In this article, the problem of tracking control for a longitudinal air-breathing hypersonic vehicle model with flexible effects and intricate couplings between the engine dynamics and flight dynamics is investigated.
Journal ArticleDOI

Interval Type-2 FNN-Based Quantized Tracking Control for Hypersonic Flight Vehicles With Prescribed Performance

TL;DR: This paper presents a tracking control scheme with quantization mechanism for hypersonic flight vehicles (HFVs) with prescribed performance using an interval type-2 fuzzy neural network (IT2FNN).
Journal ArticleDOI

Immersion and Invariance-Based Output Feedback Control of Air-Breathing Hypersonic Vehicles

TL;DR: A new output feedback control design for robust velocity and altitude tracking of an air-breathing hypersonic vehicle (AHSV) is presented and the key idea is to employ the immersion and invariance approach to design globally asymptotically stable observers for the unmeasurable states.
References
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Dynamics and thermodynamics of compressible fluid flow

TL;DR: In this paper, the Hodograph Method for Two-Dimensional, Subsonic Flow with Small Perturbations is used to describe the dynamics of two-dimensional and three-dimensional flow.
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Hypersonic and high temperature gas dynamics

TL;DR: In this article, the authors discuss the properties of high-temperature gas dynamics, including the effects of high temperature on the dynamics of Viscous Flow and Vibrational Nonequilibrium Flows.
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Hypersonic Airbreathing Propulsion

TL;DR: The first comprehensive, unified introduction to all elements of the scramjet engine that will make this feat possible is given in this article, which emphasizes fundamental principles, guiding concepts, analytical derivations, and numerical examples having clear, useful, insightful results.
Journal ArticleDOI

Nonlinear Longitudinal Dynamical Model of an Air-Breathing Hypersonic Vehicle

TL;DR: In this article, a nonlinear, physics-based model of the longitudinal dynamics for an air-breathing hypersonic vehicle is developed, which captures a number of complex interactions between the propulsion system, aerodynamics, and structural dynamics.
Journal ArticleDOI

Piston Theory-A New Aerodynamic Tool for the Aeroelastician

TL;DR: In this paper, a point-function relationship between the local pressure on the surface of a wing and the normal component of fluid velocity produced by the wing's motion is predicted, and the computation of generalized forces in aeroelastic equations, such as the flutter determinant, is then reduced to elementary integrations of assumed modes of motion.
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