In this thesis, a fuzzy adaptive output feedback controllers and chain observers for a class of nonlinear delayed systems is proposed. The proposed approach do not need the availability of the state variables. The linearization approach is used to transform a nonlinear system into a linear system through Lie derivative method. We adopt an fuzzy adaptive chain observer in which no strictly posit...

In this paper, relative orbit and attitude adaptive controllers are integrated to perform roto-translational maneuvers for CubeSats equipped with a Drag Maneuvering Device (DMD). The DMD enables the host CubeSat modulation of aerodynamic forces/torques gravity gradient torque. Adaptive independent orbital revisited account traslational-attitude coupling while compensating uncertainty in paramet...

This article proposes a novel adaptive super-twisting sliding mode control scheme with time-delay estimation technique (ASTSMC-TDE) to the yaw angle of single ducted-fan unmanned aerial vehicle system. Such systems are highly nonlinear; hence, proposed is combination several schemes; mode, TDE estimate nonlinear factors system, and an mode. The tracking error ASTSMC-TDE guaranteed be uniformly ...

The spacecraft attitude tracking problem is addressed with actuator faults and uncertainties among inertias, external disturbances, and, in particular, state estimates. A continuous sliding-mode controller designed using angular velocity estimates from an arbitrary stable stand-alone observer. Rigorous analysis shows that the ensures robust stability of entire closed-loop system as long observe...

An antisaturation backstepping control scheme based on constrained command filter for hypersonic flight vehicle (HFV) is proposed with the consideration of angle attack (AOA) constraint and actuator constraints amplitude rate. Firstly, HFV system model divided into velocity subsystem height subsystem. Secondly, to handle AOA constraint, a constructed limit retain its differentiability. And rang...

This paper is pertained with the problem of admissibility analysis of uncertain discrete-time nonlinear singular systems by adopting the state-space Takagi-Sugeno fuzzy model with time-delays and norm-bounded parameter uncertainties. Lyapunov Krasovskii functionals are constructed to obtain delay-dependent stability condition in terms of linear matrix inequalities, which is dependent on the low...

This study presents a control design of roll motion for vertical take-off and landing unmanned air vehicle (VTOL-UAV) based on the Model Reference Adaptive Control (MRAC) scheme in hovering flight phase. The adaptive laws are developed UAV system under nonparametric uncertainty (gust wind disturbance). Lyapunov-based stability analysis controlled has been conducted have accordingly developed. U...

A critic-only learning-based tracking control with prescribed performance was proposed for a class of uncertain nonlinear systems. Based on an estimator and optimal controller, novel controller designed to make errors uniformly ultimately bounded limited in region. First, unknown system dynamic employed online approximate the uncertainty invariant manifold. Subsequently, by running cost functio...

This paper presents a method for use in estimating the state of charge (SOC) lithium-ion batteries which is based on an electrochemical impedance equivalent circuit model with controlled source. Considering that open-circuit voltage battery varies SOC, source proposed and current interact each other. On this basis, radial basis function (RBF) neural network adopted to estimate uncertainty onlin...