Abstract In this paper, a higher‐order sliding‐mode observer is proposed to estimate exactly the observable states and asymptotically unobservable ones in multi‐input–multi‐output nonlinear systems with unknown inputs stable internal dynamics. addition can be identified asymptotically. Numerical examples illustrate efficacy of observer. Copyright © 2007 John Wiley & Sons, Ltd.

This paper concentrates on the problem of control a hybrid energy storage system (HESS) for an improved and optimized operation load-frequency applications. The HESS consists supercapacitor serving as main power source fuel cell auxiliary source. First, Hammerstein-type neural network is proposed to identify HESS, which formulates Hammerstein model with nonlinear static gain in cascade linear dynamic block. It provides information controller achieve adaptive performance. Second, feedforward...

<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> In this paper, a class of nonlinear systems with uncertain parameters is considered. A novel adaptive law designed to identify unknown under the assumption that time derivative some outputs measurable. Then, sliding-mode observer proposed estimate system state variables. By using inherent features observers, fault-reconstruction scheme which can be implemented online. The reconstruction signal...

In this paper, a novel adaptive fault-tolerant sliding-mode control scheme is proposed for high-speed trains, where the longitudinal dynamical model focused, and disturbances actuator faults are considered. Considering in traction force generated by system, dynamic with uncertainties modeled as input distribution matrix uncertainty established. Then, new controller design conditions healthy train which can drive tracking error system to predesigned sliding surface finite time maintain motion...

This paper investigates observer-based stabilization for nonlinear descriptor systems using a fuzzy integral sliding mode control approach. Observer-based strategies the Takagi-Sugeno (T-S) are developed. A two-step design approach is first developed to obtain observer gains and coefficients in switching function linear matrix inequalities (LMIs), results used facilitate development of single-step approach, which seen be convenient but introduces some conservatism design. The potential...

This study investigates integral sliding mode control problems for Markovian jump T–S fuzzy descriptor systems via the super‐twisting algorithm. A new surface which is continuous constructed and an scheme based on a variable gain algorithm presented to guarantee well‐posedness of state trajectories between two consecutive switchings. The stability motion analysed by considering redundancy properties membership functions. It shown that proposed extension classical single‐input case...

This article studies the distributed fault estimation (DFE) and fault-tolerant control for continuous-time interconnected systems. Using associated information among subsystems to design DFE observer can improve accuracy of Based on static output feedback (SOF), global outputs systems are used construct a (DFTC). The multiconstrained methods proposed enhance transient performance ability suppress external disturbances simultaneously. conditions presented expressed in terms linear matrix...

In this paper, robust decentralized actuator fault detection and estimation is considered for a class of non-linear large-scale systems. A sliding mode observer proposed together with an appropriate coordinate transformation to find the dynamics. Then, based on features observer, strategy using equivalent output error injection, reconstruction scheme follows by further exploiting structure uncertainty which allowed have bounds. The signals only depend available measured information thus can...

Abstract In this article, an actuator fault detection and isolation scheme for a class of nonlinear systems with uncertainty is considered. The allowed to have bound which general function the state variables. A sliding mode observer first established based on constrained Lyapunov equation. Then, equivalent output error injection employed reconstruct signal using characteristics structure uncertainty. reconstructed can approximate system any accuracy even in presence Finally, simulation...

In this technical note, a local stabilization problem for nonlinear systems with disturbances which are dependent on time-varying delay phenomena, is studied. An appropriate transformation introduced to express the system in regular form facilitates both design and analysis. Then, sufficient conditions developed based Lyapunov-Razumikhin approach such that sliding motion uniformly asymptotically or exponentially stable. A static output feedback control law, independent of time delay,...

This paper proposes a stator-winding incipient shorted-turn fault detection method for the traction motors used in China high-speed railways. First, mathematical description faults is given from quantitative point of view to preset detectability requirement. Then, an interval sliding mode observer proposed deal with uncertainties caused by measuring errors motor speed sensors. The active robust residual generator and corresponding passive threshold are based on this particularly designed...

In this technical note, a class of time varying delay nonlinear systems is considered where both parametric uncertainty and structural are involved. The uncertain parameters embedded in the system nonlinearly. bound on takes form delayed. A sliding mode observer proposed to estimate state an adaptive law unknown simultaneously. Using Lyapunov–Razuminkhin approach, sufficient conditions developed such that error uniformly ultimately bounded. simulation bioreactor shows effectiveness approach.

This paper addresses the robust stabilization problem for T-S fuzzy stochastic descriptor systems using an integral sliding mode control paradigm. A classical scheme and a nonparallel distributed compensation (Non-PDC) are presented. It is shown that two restrictive assumptions previously adopted developing controllers Takagi-Sugeno (T-S) not required with proposed framework. unified framework of formulated. The Non-PDC encompasses existing schemes when imposed hold. Stability motion...

This paper develops a sensor fault detection scheme for rail vehicle passive suspension systems, using observer, in the presence of uncertain track regularity and noises that are modeled as external disturbances stochastic process signals. To design system states augmented with treated new states, leading to an singular noises. Using output measurements, observer is designed generate needed residual signal detection. Existence conditions analyzed illustrated. In term signal, both threshold...

This paper considers system theoretic conditions for the solvability of so-called Constrained Lyapunov Problem non-square systems.These problems commonly appear in control systems literature.Both a static output feedback problem and an observer are considered.The basis work described here is new canonical form which simplifies analysis deals with equality constraint simple way.