The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper presents a new method for designing the weights used for development of robust controllers for a quadrotor model with parameter uncertainty. The weights alongside the controllers are developed for attitude and altitude tracking by resolving a constrained non-linear minimization problem formulated over the conventional mixed sensitivity optimization S over T method. The optimization routine...
A robust model predictive control approach for a class of uncertain continuous systems with nonlinear disturbance and state-delay is proposed. The designed robust controller guarantees the closed-loop system asymptotically stable and the receding horizon performance index online minimum. Based on receding optimization principle of predictive control, the infinite time domain optimization problem is...
This paper is devoted to the consensus problem of fractional order multi-agent networks. A LMI condition for H∞ control of the fractional order uncertain systems is obtained. Based on this LMI condition, the H∞ consensus condition for fractional order multi-agent network is deduced by using graph theory and robust H∞ control theory. Finally, by simulations, the effectiveness of the LMI condition and...
In this paper, the non-fragile finite-time tracking control problem is addressed for a class of uncertain linear systems with controller multiplicative coefficient variations. An adaptive control strategy is constructed to ensure that the system tracks a time-varying target orbit. The relationship of the bound of tracking errors and the size of uncertainties and controller multiplicative coefficient...
In order to reduce the online calculation amount and improve the response speed, this paper proposes a robust model predictive control algorithm for nonlinear uncertain systems based on linear matrix inequality (LMI). The algorithm is divided into two parts: offline algorithm and online algorithm. In the offline algorithm, a sequence of asymptotically stable invariant ellipsoids and the corresponding...
Jump random noises exist widely in control systems. In this paper, the guaranteed cost control problem for uncertain systems perturbed by jump random noises is considered. By adopting Poisson process to describe jump random noises, this paper utilize martingale theory to design a controller, which can stabilize such stochastic systems and guarantee the specified cost function has an upper bound.
Robust state estimation of a discrete time-varying uncertain system is investigated in this paper when there are not only process and measurement noise, but also parameter uncertainties which affect a state-space model arbitrarily. The expectation minimization based robust state estimation is generalized to uncertain linear systems with a known deterministic input signal. The derived robust estimator...
Lately, it has been developed many studies related to the control of uncertain systems, one reason for this studies is because it is hard to precisely describe a system, therefore the process is expressed as uncertain systems. One way to represent an uncertain system is by describing the model as a convex combination of several knownmodels. In this paper a state feedback controller is designed for...
Structural controllability, as a generic structure-based property in determining the ability of a complex network to reach the desired configuration, is addressed in this work. Using a robust measure derived from robust control theory, this paper deals with structural controllability of a type of weighted network of networks (NetoNets) involving linear couplings between its corresponding networks...
In this paper, the system decoupling problem has been investigated and a novel decoupling control strategy is presented for Lipschitz nonlinear uncertain multivariable systems. This control strategy consists of an explicit parametric state feedback controller and a linear state observer, where the free parameters of the controller can be adjusted to attenuate the coupling effects. In addition, the...
The study in this article focuses on chattering free higher order sliding mode control (HOSMC) and continuous time event triggered higher order sliding mode control (ET-HOSMC) for nonlinear uncertain systems. Conventional sliding mode control is affected by high-frequency oscillation in the control signal known as chattering. Chattering in the control signal overshadows the main advantages of sliding...
In this paper, the problem of adaptive fixed-time 6 degree-of-freedom (DOF) tracking control for spacecraft non-cooperative rendezvous in presence of the parameter uncertainties and external disturbances is investigated. Firstly, a new multilayer fixed-time sliding mode surface (MFSMS) is designed, and the setting time of the proposed surface can be estimated without the knowledge of the initial conditions...
Robust adaptive time-varying formation control problems for high-order linear multi-agent systems with parameter uncertainties and external disturbances are investigated. Firstly, using the adaptive updating mechanism, a fully distributed time-varying formation control protocol is proposed. The protocol is determined by each agent in a fully distributed form and does not need any global information...
This study investigates the problem of robust finite-time H∞ control for nonlinear system with parameter uncertainties and one-side Lipschitz via output feedback. The nonlinear function is considered to satisfy nonlinear condition. By means of Linear matrix inequality (LMI) techniques, design algorithms of static output feedback controller are developed. Finally, numerical examples are presented to...
This paper proposes a robust fault detection observer based on zonotopes for discrete-time uncertain systems with sensor faults and unknown but bounded uncertainties. The main advantage of this method is that the observer gain of the robust zonotopic observer is designed to be robust against bounded uncertainties while being sensitive to faults. In order to detect sensor faults with low magnitudes,...
In this paper, we first formulate the event-triggered robust practical output regulation problem for a class of linear minimum-phase systems. The problem formulation requires the solution to the closed-loop system exist for all t ≥ 0, thus ruling out the possibility of the Zeno behavior, and the steady-state tracking error be made arbitrarily small. Then, we present the solvability of the problem...
This paper presents a robust control scheme for the tracking control of singularly perturbed uncertain systems. The design problem is divided into two parts: tracking the reference trajectory and enhancing the robustness of the dynamic systems. By using the time-scale techniques, dynamic inversion approach and linear parameter-varying methods, a set of singularly perturbed state feedback controllers...
In this paper, the robust variance-constrained composite control problem is investigated for linear uncertain discrete-time stochastic systems. The parameter uncertainties are allowed to be norm-bounded and enter into the state matrix. The purpose of this problem is to design a disturbance observer to estimate the disturbance generated by an exogenous system, then construct the control strategy by...
In this paper, we study the problem of robust H∞ control for a class of the time-delay singularly perturbed systems with norm-bounded parameters and uncertain parameters. The sufficient conditions for the existence of H∞ robust controllers are given based on the matrix inequality, so that the closed-loop system is robust to all admissible uncertainties and satisfies H∞ performance index. Furthermore,...
In the reentry stage, the hypersonic gliding vehicle (HGV) has the obvious characteristics like high-dynamic, large flight envelop, complex flight environment and so on. These features result in severe parameter uncertainties. In order to improve the attitude control performance in reentry stage, the sources of the uncertainty and the unknown parameters are analyzed. Then a robust adaptive controller...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.