Prescribed Performance Tracking Control for the Hypersonic Vehicle with Actuator Faults

Abstract

This paper provides a solution for the trajectory tracking control of a hypersonic flight vehicle (HFV), which is encountered performance constraints, actuator faults, external disturbances, and system uncertainties. For the altitude and velocity control subsystems, the backstepping-based dynamic surface control (DSC) strategy is constructed to guarantee the predefined constraint of tracking errors. The introduction of first-order low-pass filters effectively remedies the problem of “complexity explosion” existing in high-order backstepping design. Simultaneously, radial basis function neural networks (RBFNNs) are adopted for approximating the unavailable dynamics, in which the minimum learning parameter (MLP) algorithm brilliantly alleviates the excessive occupation of the computational resource. Specially, in consideration of the unknown actuator failures, the adaptive signals are designed to enhance the reliability of the closed-loop system. Finally, according to rigorous theoretical analysis and simulation experiment, the stability of the proposed controller is verified, and its superiority is exhibited intuitively.

Backstepping Control Based on Constrained Command Filter for Hypersonic Flight Vehicles with AOA and Actuator Constraints

“…When the control input exits saturation, δ ed ∈ ½ δ min , δ max , notice that lim ω δ ⟶∞ χ δ1 = δ ed , and δ e = H δ ðχ δ1 Þ, so in equation ( 67), there is ðδ e − δ ed Þ ∈ l ∞ . When the auxiliary variable satisfies jξ q j ≥ jðδ e − δ ed Þ/k qξ2 j, equation (67) can 8 International Journal of Aerospace Engineering be simplified to _ W ξ ≤ −k qξ1 ξ 2 q obviously. Therefore, ξ q is bounded and e q is bounded.…”

“…At present, the commonly used idea is to design controllers for the inputoutput subsystem based on output redefinition method [3,4]. An alternative method which is available for dealing with the controller design problem of such a strong nonlinear system as HFV is backstepping approach [5][6][7][8][9][10][11]. The backstepping method is applied firstly to the attitude control of HFV in Ref.…”

“…The problem of "differential explosion" occurs easily in the design of the backstepping controller due to the high order of the altitude subsystem of HFV. To solve the problem, the command filter [6], dynamic surface control [8,9], tracking differentiator [10,11], and other technologies are widely used in the backstepping control method. To deal with uncertainties as well as external disturbance of HFV, disturbance observers [12,13] and intelligent approximations [14][15][16] are widely used in controller design.…”

Output redefinition-based active disturbance rejection control for nonminimum phase hypersonic vehicles

“…Hypersonic vehicles (HSVs) attract worldwide attention caused by potential military and civil applications (Duan and Pei, 2012;Xu and Shi, 2015). As one of the core technologies of HSVs, flight control technology faces enormous challenges including the flexible effect (Chen et al, 2020;Sun et al, 2023;Xu et al, 2023), angle of attack constraint (Dong et al, 2023;Xu et al, 2023;Yang et al, 2021) and nonminimum phase (Xu et al, 2021). For airbreathing HSVs (e.g.…”