Clearance of flight control law based on structural singular value theory

Liu, Lei; Dong, Shuai; Wang, Yongji; Ou, Liuli

doi:10.1109/taes.2015.130822

Cited by 14 publications

(11 citation statements)

References 18 publications

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“…This study adopts the typical waverider geometry of waverider in [5] to validate the feasibility of the proposed control law. This configuration makes the vehicle forebody become a significant section of the inlet compression process, whereas its afterbody performs a large part of the nozzle, which generates considerable thrust [35]. The propulsive system design encompasses the entire undersurface of the waverider.…”

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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“…The PLC outputs 4-20mA current signal, which is used to control the valve through proportional amplifier. The angle and displacement sensors are applied to reflect the cylinder's movements [29]- [31].…”

Section: A Hydraulic Equipmentmentioning

confidence: 99%

Constant Tension Characteristic Analysis and Experimental Verification of Passive Compensation Device

Xu¹,

Li²,

Chen³

2019

IJMMM

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The tension study of accumulator is a critical factor in designing hydraulic system. The accumulator regarded as air spring when connected with cylinder plays the role of shock absorption and energy storage. Based on the luffing mechanism of crane, this paper structures mathematical model of accumulator-cylinder, simulates and analyzes the frequency response characteristics of the accumulator, and verifies the constant tension characteristics in experiments. The results show that the volume of accumulator decides the compensation effect. But no matter how large the volume of accumulator is, complete compensation could not be achieved. The comparison between system pressure and the boom motion shows the superior constant tension characteristic of the accumulator.

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“…For inequality (16), multiply it by diag{ −1 , , , }, and let −1 = , = ; then inequality (12) is obtained based on Lemma 1. We introduce the equation of ( ( )) = ( ) ( ); then formula (17) for uncertain closed-loop system is obtained:…”

Section: Robust Guaranteed Cost Control Of Hypersonic Vehiclementioning

confidence: 99%

“…With the maturation of robust control theory, Kharitonov interval theory, ∞ control theory, and structural singular value theory ( theory) have been widely used in aircraft controller design and trajectory tracking. For instance, the refinement of the existing method by considering 16 segment plants instead of 16 Kharitonov plants provides an efficient tool for designing all robustly stabilizing PID controllers for an interval system [14]. An ∞ method for designing reduced-order output-feedback controllers for linear time-invariant retarded systems was introduced to achieve a minimum bound on the -infinity performance level [15].…”

Section: Introductionmentioning

confidence: 99%

“…An ∞ method for designing reduced-order output-feedback controllers for linear time-invariant retarded systems was introduced to achieve a minimum bound on the -infinity performance level [15]. The clearance of flight control law for a hypersonic gliding vehicle (HGV) and two linear clearance criteria based on structural singular value ( ) theory were proposed in [16]. However, since the aircraft is a nonlinear system, of which the mathematical model has parametric uncertainties, it is straightforward to deviate from the actual control by using direct linearization method.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Novel SHLNN Based Robust Control and Tracking Method for Hypersonic Vehicle under Parameter Uncertainty

Li¹,

Wu²,

Yang³

et al. 2017

Complexity

Self Cite

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Hypersonic vehicle is a typical parameter uncertain system with significant characteristics of strong coupling, nonlinearity, and external disturbance. In this paper, a combined system modeling approach is proposed to approximate the actual vehicle system. The state feedback control strategy is adopted based on the robust guaranteed cost control (RGCC) theory, where the Lyapunov function is applied to get control law for nonlinear system and the problem is transformed into a feasible solution by linear matrix inequalities (LMI) method. In addition, a nonfragile guaranteed cost controller solved by LMI optimization approach is employed to the linear error system, where a single hidden layer neural network (SHLNN) is employed as an additive gain compensator to reduce excessive performance caused by perturbations and uncertainties. Simulation results show the stability and well tracking performance for the proposed strategy in controlling the vehicle system.

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Clearance of flight control law based on structural singular value theory

Cited by 14 publications

References 18 publications

Nonlinear Trajectory Controller with Improved Performances for Waveriders

Nonlinear Trajectory Controller with Improved Performances for Waveriders

Constant Tension Characteristic Analysis and Experimental Verification of Passive Compensation Device

A Novel SHLNN Based Robust Control and Tracking Method for Hypersonic Vehicle under Parameter Uncertainty

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