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Over the last few years, the combination synchronization of chaotic system receives a special attention. This paper introduces the idea of combination synchronization into complex networks. Based on sliding mode control (SMC) principle, the finite-time combination synchronization (FTCS) of four uncertain complex networks which combining as the form of A+B+C-D is investigated. And there are unknown...
Quantum robust control has been recognized as a critical issue in quantum systems, since many quantum systems are unavoidably subject to disturbances and uncertainties in practical applications. Considered uncertainty of Hamiltonian in the Markovian quantum system, on one hand this paper define the control effect based on fidelity, purity and degree of coherence, on the other hand design control scheme...
This paper proposes a novel integrated guidance and autopilot (IGA) method for hypersonic vehicles in dive phase. The third order back-stepping L1 adaptive control is implemented to deal with the uncertainties of aerodynamics coefficients, degradation of control surface efficiency and unmatched time-varying disturbances in the nonlinear flight dynamics. Furthermore, a second order actuator dynamics...
In this paper, the finite time trajectory tracking method is established for hypersonic vehicles. A new quasi-linear parameter varying model is proposed and a finite time controller is designed by the sliding mode method of output feedback. The matching conditions of disturbances and uncertainties are satisfied naturally which ensures the established control method has very excellent robustness and...
This paper is devoted to investigating the problems of the variable structure control and optimization for a class of time delay systems, which contain matched uncertainty and unmatched uncertainty, time-varying delay in state of system. Firstly, some special transformation is made for the considered system to obtain an equivalent system. A sliding surface is designed to ensure the behavior of system...
For the problem of the synchronization between two chaotic systems with external disturbances and nonlinear input, based on the Lyapunov's stability theory and combined the finite time principle with control technology existed, a sliding mode controller was designed by a new type of sliding surface and the corresponding control rule of sliding mode selectivity to achieve the synchronization control...
A novel disturbance rejection control scheme is proposed to address the robust attitude control problem for the air-breathing hypersonic vehicle (AHV) with mismatched disturbances. The attitude control system is decomposed into two subsystems, the outer-loop subsystem and inner-loop subsystem. The predictive sliding mode control (PSMC) is utilized to attenuate mismatched model uncertainties imposed...
In this paper, a novel finite-time second-order sliding mode control (FTSOSMC) for trajectory tracking of underwater vehicles subject to system uncertainties and unknown disturbances, is proposed. In this control design, an second order sliding mode control framework is designed with a complete compensation of disturbance to obtain high tracking accuracy and relax the necessity of the disturbance...
This paper investigates the sliding mode control for discrete time system with input delay and uncertainty. Two different hyperbolic functions are introduced during sliding surface design procedure to design a novel sliding surface, named as hyperbolic hybrid switching sliding surface. Because of the introduction of two hyperbolic functions, we artificially achieve the switching of sliding surface...
In this paper, we consider the robust sliding mode control problem for a class of systems with norm bounded parametric uncertainty and external disturbance. Based on Lyapunov stability theory and linear matrix inequality approach, the proposed control scheme can achieve both asymptotic stability and some robust performances, and the corresponding robust controller that assures the occurrence of sliding...
In this paper, robust Integral Sliding Mode Control (ISMC) will be proposed for an underactuated rotary hook system in order to deal with parametric uncertainties presenting in the system parameters. By using the proposed ISMC, the reaching phase encountered in the conventional SMC will be eliminated and as a consequence, the dynamic ambiguity, which occurs when the system is in the transient state...
A continuous stirred tank reactor (CSTR) is typical of equipment found in the process control industry. The dynamics represent a wide class of second order nonlinear systems and thus as well as having specific industrial application, control of the CSTR is frequently used as a benchmark problem for application and testing of new control algorithms. Due to the high complexity of the CSTR system, the...
Sliding mode control (SMC) design technique is a well-known control design method to cope with disturbance and uncertainty. This paper considers a new sliding model design technique for a class of second-order systems which are acted by friction force. Comparing to the global sliding model design technique, it designs the sliding mode for a specific sliding region. Outside the sliding region, the...
This paper addresses the problem of steering an underactuated hovercraft along a desired horizontal path in the presence of dynamic uncertainties. First, based on the predefined reference path, the Line-of-Sight (LOS) guidance is built in a moving Serret-Frenet frame along the virtual target on the path. The position and orientation error dynamics are introduced by using coordinate transformation...
This paper presents a fractional order sliding mode control for motion control of linear motor. Due to global memory characteristics and actual nature expression, fractional calculus is introduced into the design of sliding mode surface to achieve precision tracking of reference signals, and it is first to design a fractional order sliding mode controller for linear motor motion. LuGre model is employed...
The attitude control for reusable launch vehicles (RLV) is responsible for the robust operation to avoid the major deterioration from uncertainties of parameters and external disturbances in the reentry phase. Targeting for these practical issues with the study of the feedback-linearized RLV rotational equations of motion, two global sliding mode control (SMC) strategies are proposed with modified...
The attitude tracking control problem of reusable launch vehicle (RLV) in reentry phase is investigated in this paper. The control-oriented model is firstly developed from the attitude model, and it is decomposed into two subsystems on the basis of the engineering backgrounds of RLV. Via backstepping design procedure, sliding mode control scheme is designed while the lumped uncertainty is estimated...
In this paper, adaptive neural network control for uncertain offshore steel jacket platform with nonlinear self-excited wave force is studied. A sliding mode based adaptive controller is constructed to reduce the oscillation amplitudes of the system. The neural network systems are used to cancel the system uncertainties. Throughout the simulation results we can find that the proposed control method...
This paper investigates the tracking control problems of a voice coil motor (VCM) actuated servo gantry system. A novel sliding mode disturbance observer based control algorithm is proposed to accommodate both model uncertainties and various disturbances. In the proposed control architecture, the sliding mode observer is introduced to estimate the total disturbances such that the observer error can...
This study presents a decoupled sliding mode controller for an inverted pendulum on a cart. The sliding mode control is a special type of variable structure control and it is applicable to the systems represented in the canonical form. For the systems which are not represented by the canonical form such as the inverted pendulum, the decoupled form of the sliding mode controller can be used. In this...
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