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An adaptive iterative learning controller (ILC) is proposed for a class of nonlinear systems with hysteresis described by Bouc-Wen model. First, the property of Bouc-Wen mode is discussed and the upper bound is derived .Then an iterative learning controller is proposed through the Lyapunov-like function. This controller can eliminate the oscillation and overshoot caused by hysteresis effectively....
This paper is concerned with the problems of modeling and stabilization for a class of singular systems with state delay and event-triggered scheme. Based on event-triggered scheme, a model of singular closed-loop system is proposed. In this paper, all of the problems of regular, impulse-free and stable are considered. According to the model, sufficient conditions of regular, impulse free and stable...
Finite-time control of input-delay system with nonlinear saturating actuator is considered by virtue of time domain approach in this paper. State feedback controller is designed to make the closed-loop systems finite-time stable. Sufficient condition which guarantees finite-time stability of input-delay system with saturating actuator is given in terms of comparison function method. By virtue of our...
This paper deals with the issues of both robust state estimation and actuator fault detection for a class of uncertain switched linear systems under average dwell time (ADT). A robust switched observer is proposed to estimate the states of switched system even if it is subject to simultaneous disturbance inputs and actuator faults, where the disturbance inputs are decoupled and the actuator faults...
In recent years, high performance smallsats have experienced a rapid advancement, micro/nanosatellites based space system turned more powerful platforms and are to be aggregated as building blocks to construct large spacecraft with enhanced payload capabilities. The mission and technique development requires more compact while better precision and agility attitude control system. Magnetically levitated...
An intermittent control scheme is presented for consensus of the multi-agent system, in term of the pulse function, which is introduce to describe the constraints of the actuator. The proposed scheme is a general framework covering the impulsive control, and (zero-order hold) sampled control by choosing special functions as the pulse function. By using graph theory and the property of stochastic matrices,...
This paper analyzes the stability for a class of nonlinear descriptor system via T-S fuzzy model with actuator saturation and proposes a controller design method for the system. A set invariance condition is first presented such that the closed-loop system is regular and impulse free, and under which an ellipsoid is contractively invariant. Then the methods of estimating the attraction domain for...
This paper considers the L2 gain analysis problem for switched linear parameter-varying (LPV) systems in the presence of actuator saturation. The multiple parameter-dependent Lyapunov functions approach is used to design a state feedback law and parameter mode-dependent switching law without requiring the stability of each subsystem. A sufficient condition is obtained by a matrix optimization to guarantee...
This paper studies the drag-free satellite systems with double actuators along each single dimensional, an adaptive failure compensation scheme is developed for the systems with uncertain actuator failures by employing backstepping strategy. The design method is to estimate the failure parameters and use the parameter estimates to construct the control law. The control law calculation is done simultaneously...
This paper considers the linear controllability and observability of an n-link planar robot with active joints. The controllability and observability around the upright equilibrium point (UEP) are investigated. Specific properties of the mechanical parameters are used to derive a necessary and sufficient condition for the linear controllability and observability of the robot when any of the n - 2...
In this paper, the anti-windup compensator design using event-triggered strategy for linear systems subject to actuator saturation is investigated. Different from the existing result with prescribed anti-windup compensator gain, the main contribution of this paper is that a sufficient condition is presented for anti-windup compensation with event-triggered control and an iterative algorithm is formulated...
This paper considers pointwise stabilization of an Euler-Bernoulli beam equation where two kinds of feedback are jointed with each other for the arbitrary internal point in the boundary conditions. The asymptotic expressions of the eigenvalues are obtained for all sufficient large positive integers. And then the asymptotical stability and exponential stability have been analyzed by the characteristic...
In this paper, the stabilization bound problem for time-delay singularly perturbed systems (SPSs) with actuator saturation is considered. Based on the Lyapunov-Kravoskii functional and linear matrix inequality (LMI) approach, the design method of stabilization controller for SPSs with time-delay and actuator saturation is proposed. Then, the problem of estimating the domain of attraction depending...
This paper considers the tracking fault-tolerant controller design problem for a class of nonlinear systems with unknown functions and actuator dead-zone. Based on dynamic surface control scheme and neural network approximated technique, some assumptions on nonlinear functions are removed. Also, the structure of controller is simple without the problem of ‘explosion of complexity’. Simultaneously,...
In this paper, the problem of robust tracking control is investigated. Simulation on the longitudinal model of a flexible air-breathing hypersonic vehicle (FAHV) with actuator saturation and uncertainties is conducted. In order to guarantee that the velocity and altitude to track their reference commands, an adaptive anti-up control strategy is presented based on sliding mode control method. The adaptive...
The problem of fault-tolerant tracking control is studied for a class of uncertain nonlinear systems with actuator failures. An adaptive neural networks (NNs) fault-tolerant tracking control strategy is proposed by combing backstepping with NNs, the implicit function theory, the mean value theorem and the dynamic surface control (DSC) technique. It is proven that it can guarantee all signals in the...
In this paper, based on variable universe fuzzy tracking control (VUFC), we present a novel adaptive algorithm for a class of pure-feedback systems with unknown dead-zone inputs. With some new states variables and coordinate transforms, the system is converted into the normal system and observers need to be designed. So, we can consider VUFC scheme rather than backstepping scheme. VUFC are mainly...
In this paper, the problem of adaptive tracking control for a class of linear continuous time-invariant systems subject to constrained actuators is investigated. A novel control strategy is developed to ensure the bounded tracking of the systems. Based on Lyapunov stability theory, a result that indicates the tracking bound can be reduced as small as desired via adjusting control parameters is obtained...
In this paper, the piezoceramic actuators are used in fine steering mirror (FSM) for inter-satellite laser communication. To improve the control system performance and reduce the nonlinear hysteresis and creep of FSM, the characteristics of piezoelectric actuators is analyzed, and then an inverse model of feed-forward compensation and a feedback controller based on the Static Output Feedback (SOF)...
This paper investigates the robust stabilization problem of general switched nonlinear systems subject to actuator saturation under arbitrary switching paths. Firstly, the robust stabilization of nonlinear switched Hamiltonian systems with actuator saturation is studied, the saturation function is expressed by a control input and compensation, then several sufficient conditions are derived and an...
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