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Zhaoying Li
School of Astronautics, Beihang University, 37 Xueyuan Road, Haidian District, Beijing 100083, China

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Journal article
Published: 29 June 2021 in Aerospace
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This paper investigates the fault tolerance control of hypersonic aircrafts with L1 adaptive control method in the presence of loss of actuator effectiveness fault. The hypersonic model considers the uncertainties caused by the features of nonlinearities and couplings. Elasticity is taken into account in hypersonic vehicle modeling which makes the model more accurate. A velocity L1 adaptive controller and an altitude L1 adaptive controller are designed to control flexible hypersonic vehicle model with actuator loss fault. A PID controller is designed as well for comparison. Finally, the simulation results are used to analyze the effectiveness of the controller. Compared to the results of PID controller, L1 controllers have better performance.

ACS Style

Zhaoying Li; Shuai Shi. \({\mathcal{L}_1}\) Adaptive Loss Fault Tolerance Control of Unmanned Hypersonic Aircraft with Elasticity. Aerospace 2021, 8, 176 .

AMA Style

Zhaoying Li, Shuai Shi. \({\mathcal{L}_1}\) Adaptive Loss Fault Tolerance Control of Unmanned Hypersonic Aircraft with Elasticity. Aerospace. 2021; 8 (7):176.

Chicago/Turabian Style

Zhaoying Li; Shuai Shi. 2021. "\({\mathcal{L}_1}\) Adaptive Loss Fault Tolerance Control of Unmanned Hypersonic Aircraft with Elasticity." Aerospace 8, no. 7: 176.

Journal article
Published: 22 August 2018 in Aerospace Science and Technology
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In this paper, a nonlinear robust controller is proposed to deal with the flight mode transition control problem of tail-sitter aircrafts. During the mode transitions, the control problem is challenging due to the high nonlinearities and strong couplings. The tail-sitter aircraft model can be considered as a nominal part with uncertainties including nonlinear terms, parametric uncertainties, and external disturbances. The proposed controller consists of a nominal H∞ controller and a nonlinear disturbance observer. The nominal H∞ controller based on the nominal model is designed to achieve the desired trajectory tracking performance. The uncertainties are regarded as equivalent disturbances to restrain their influences by the nonlinear disturbance observer. Theoretical analysis and simulation results are given to show advantages of the proposed control method, compared with the standard H∞ control approach.

ACS Style

Zhaoying Li; Lixin Zhang; Hao Liu; Zongyu Zuo; Cunjia Liu. Nonlinear robust control of tail-sitter aircrafts in flight mode transitions. Aerospace Science and Technology 2018, 81, 348 -361.

AMA Style

Zhaoying Li, Lixin Zhang, Hao Liu, Zongyu Zuo, Cunjia Liu. Nonlinear robust control of tail-sitter aircrafts in flight mode transitions. Aerospace Science and Technology. 2018; 81 ():348-361.

Chicago/Turabian Style

Zhaoying Li; Lixin Zhang; Hao Liu; Zongyu Zuo; Cunjia Liu. 2018. "Nonlinear robust control of tail-sitter aircrafts in flight mode transitions." Aerospace Science and Technology 81, no. : 348-361.

Journal article
Published: 01 September 2016 in ISA Transactions
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This paper addresses the nonlinear robust tracking controller design problem for hypersonic vehicles. This problem is challenging due to strong coupling between the aerodynamics and the propulsion system, and the uncertainties involved in the vehicle dynamics including parametric uncertainties, unmodeled model uncertainties, and external disturbances. By utilizing the feedback linearization technique, a linear tracking error system is established with prescribed references. For the linear model, a robust controller is proposed based on the signal compensation theory to guarantee that the tracking error dynamics is robustly stable. Numerical simulation results are given to show the advantages of the proposed nonlinear robust control method, compared to the robust loop-shaping control approach.

ACS Style

Zhaoying Li; Wenjie Zhou; Hao Liu. Nonlinear robust control of hypersonic aircrafts with interactions between flight dynamics and propulsion systems. ISA Transactions 2016, 64, 1 -11.

AMA Style

Zhaoying Li, Wenjie Zhou, Hao Liu. Nonlinear robust control of hypersonic aircrafts with interactions between flight dynamics and propulsion systems. ISA Transactions. 2016; 64 ():1-11.

Chicago/Turabian Style

Zhaoying Li; Wenjie Zhou; Hao Liu. 2016. "Nonlinear robust control of hypersonic aircrafts with interactions between flight dynamics and propulsion systems." ISA Transactions 64, no. : 1-11.