Incremental Twisting Fault Tolerant Control for Hypersonic Vehicles With Partial Model Knowledge

Abstract

A passive fault tolerant control scheme is proposed for the full reentry trajectory tracking of a hypersonic vehicle in the presence of modelling uncertainties, external disturbances, and actuator faults. To achieve this goal, the attitude error dynamics with relative degree two is formulated first by ignoring the nonlinearities induced by the translational motions. Then, a multivariable twisting controller is developed as a benchmark to ensure the precise tracking task. Theoretical analysis with the Lyapunov method proves that the attitude tracking error and its first-order derivative can simultaneously converge to the origin exponentially. To depend less on the model knowledge and reduce the system uncertainties, an incremental twisting fault tolerant controller is derived based on the incremental nonlinear dynamic inversion control and the predesigned twisting controller. It is shown that not only the benefits of both incremental control and twisting control are inherited, but also their side effects are reduced. Notably, the proposed controller is user friendly in that only fixed gains and partial model knowledge are required. Numerical simulations in various cases and comparison studies are conducted to verify the effectiveness of the proposed method.

Variable-horizon predictive tracking control for air-breathing hypersonic vehicle based on composite disturbance observer

“…According to equation (23), minimizing the performance index J with respect to u, that is, ∂J/∂u T = 0, we can obtain an optimal control law based on prediction. The derivation procedure is as follows:…”

“…One of the main factors threatening flight safety is external disturbances due to the complex environment of AHV. 4,23,24 Despite the PC technique being provided with certain prominent advantages, it cannot eliminate the negative impact of disturbances on system performance. 25 Then, we need to have the aid of certain effective means to offset the disadvantages produced by disturbances.…”

Learning observer-based fault-tolerant tracking control for hypersonic vehicle with actuator faults

“…The structure of the passive fault-tolerant control is fixed regardless the system fails or not. In [17], combined with the twist control method, a passive fault-tolerant tracking controller was studied for hypersonic vehicle with modeling uncertainty, external interference and actuator failure. Passive fault-tolerant control has strong fault-tolerant performance for known fault or interference information or part of known information, and most of the passive fault-tolerant controller need the upper limit information or derivative information of the fault, which makes the controller have great limitations.…”

Finite-Time Attitude Tracking Control for Hypersonic Flight Vehicles with Actuator Saturation

“…In recent years, there have been a lot of research results on hypersonic vehicle controller design with external disturbances and uncertainties. Sliding mode control (SMC) [7,8], backstepping control [9], twisting control [10], adaptive control [11], coupling effect-triggered control (CETC) [12], and compound control methods of the ways mentioned above have been largely used to enhance the attitude control performance. In [13], a tracking control scheme with quantization mechanism, which uses an interval type-2 fuzzy neural network (IT2FNN) is proposed for HFVs.…”