Polytopic LPV modeling and gain-scheduled switching control for a flexible air-breathing hypersonic vehicle

There is a severe lag between the pitch attitude and flight path angle of hypersonic vehicles, imposing extraordinary difficulty in achieving high-precision trajectory control. A comprehensive flight path regulation scheme is proposed to resolve this problem. The inherent relationship between the pitch attitude and flight path angle is sufficiently used to establish a feed-forward control framework where the flight path reference is directly fed into the attitude loop in order to quickly obtain the major control component. To achieve efficient tracking, an attitude control method based on active disturbance rejection control (ADRC) is proposed. The new attitude control method utilizes an extended state observer (ESO) to estimate the unknown model dynamics and external disturbances. The remaining part of control is generated by ADRC acting on the flight path angle, which plays a complementary role. The stability margin tester is used to tune the attitude controller explicitly. Finally, simulation examples are provided to demonstrate the effectiveness of the proposed method.

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“…59, No. 4,2016 where u 0 is a virtual control variable, the original system (7) can be appropriately reformulated as…”

Section: Attitude Control Designmentioning

confidence: 99%

“…[1][2][3][4] In addition to the precise attitude control requirement for hypersonic vehicles, an efficient path control is also necessary. For the longitudinal dynamics, it is well known that there are correlations between the pitch angle and flight path angle.…”

Section: Introductionmentioning

confidence: 99%

Practical Solution to Efficient Flight Path Control for Hypersonic Vehicles

Sun

Wang

et al. 2016

Trans. Japan Soc. Aero. S Sci.

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“…Huang et al reported a polytopic parameter-varying model applied to a flexible air-breathing hypersonic vehicle; they divided the system into sub-regions, proposed a controller for each sub-region and switched between them to get closed-loop asymptotically stable local systems. A similar approach applied to unmanned aerial vehicles was reported in [52], but in both cases, the polytopic subsystems were considered adjacent simplifying the stability analysis. The case of asynchronous polytopic switching was addressed on [53] for a highly maneuverable vehicle; in such paper only numerical simulations were reported.…”

Section: Introductionmentioning

confidence: 99%

Switched Polytopic Controller Applied on a Positive Reconfigurable Power Electronic Converter

et al. 2018

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Abstract:The reconfigurable power electronic converters (RPECs) are a new generation of systems, which modify their physical configuration in terms of a desired input or output operation characteristic. This kind of converters is very attractive in terms of versatility, compactness, and robustness. They have been proposed in areas such as illumination, transport electrification (TE), eenewable energy (RE), smart grids and the internet of things (IoT). However, the resulting converters operate in switched variable operation-regions, rather than over single operation points. As a result, there is a complexity increment on the modeling and control stage such that traditional techniques are no longer valid. In order to overcome these challenges, this paper proposes a kind of switched polytopic controller (SPC) suitable to stabilize an RPEC. Modeling, control, numerical and practical results are reported. To this end, a 400 W positive synchronous bi-directional buck/boost converter is used as a testbed. It is also shown, that the proposed converter and robust controller accomplish a compact, modular and reliable design during different working configuration, operation points and load changes.

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“…For an AHV with actuator faults, an adaptive faulttolerant controller is devised on the basis of a TakagiSugeno (T-S) fuzzy system [11]. In [12,13], a linear parameter-varying (LPV) affine model is first constructed to describe the complex longitudinal dynamics of an AHV. Then, a nonfragile switching tracking control methodology is proposed [12,13].…”

Section: Introductionmentioning

confidence: 99%

“…In [12,13], a linear parameter-varying (LPV) affine model is first constructed to describe the complex longitudinal dynamics of an AHV. Then, a nonfragile switching tracking control methodology is proposed [12,13]. In [14], a compound control approachcombined trajectory linearization control (TLC) with active disturbance rejection control (ADRC) is presented for an AHV.…”

Section: Introductionmentioning

confidence: 99%

Concise Neural Nonaffine Control of Air-Breathing Hypersonic Vehicles Subject to Parametric Uncertainties

Bu¹,

Wang²,

Zhao³

et al. 2017

International Journal of Aerospace Engineering

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In this paper, a novel simplified neural control strategy is proposed for the longitudinal dynamics of an air-breathing hypersonic vehicle (AHV) directly using nonaffine models instead of affine ones. For the velocity dynamics, an adaptive neural controller is devised based on a minimal-learning parameter (MLP) technique for the sake of decreasing computational loads. The altitude dynamics is rewritten as a pure feedback nonaffine formulation, for which a novel concise neural control approach is achieved without backstepping. The special contributions are that the control architecture is concise and the computational cost is low. Moreover, the exploited controller possesses good practicability since there is no need for affine models. The semiglobally uniformly ultimate boundedness of all the closed-loop system signals is guaranteed via Lyapunov stability theory. Finally, simulation results are presented to validate the effectiveness of the investigated control methodology in the presence of parametric uncertainties.

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Polytopic LPV modeling and gain-scheduled switching control for a flexible air-breathing hypersonic vehicle

Cited by 34 publications

References 22 publications

Practical Solution to Efficient Flight Path Control for Hypersonic Vehicles

Practical Solution to Efficient Flight Path Control for Hypersonic Vehicles

Switched Polytopic Controller Applied on a Positive Reconfigurable Power Electronic Converter

Concise Neural Nonaffine Control of Air-Breathing Hypersonic Vehicles Subject to Parametric Uncertainties

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