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.
In this paper, aiming at asymptotic output consensus tracking, a distributed adaptive controller is proposed for a group of unknown linear subsystems with external disturbances. The subsystems are allowed to have nonidentical dynamics whereas with similar structures. The interaction graph among subsystems is directed, and the desired trajectory information is available only to a subset of the subsystems...
This paper investigates the consensus problem of homogeneous linear multi-agent systems using output feedback. An observer-type protocol is formulated, which only requires relative outputs of neighbours but not the information exchange between controllers. It is shown that the protocol bridges some existing ones of the same nature. A robust control approach is presented for consensus protocol design,...
In this paper, we propose dual quaternion based dynamic output feedbacks for the translational and rotational stability problem of a rigid body without linear velocity and angular velocity measurements. Dual quaternion is a new kind of tools to express the motion of rigid bodies in 3D space, including translation and rotation. Our approach consists of an output feedback controller and introducing...
This paper studies L2-disturbance attenuation simultaneous control problem for a class of nonlinear descriptor systems via a state undecomposed approach. First, two nonlinear descriptor systems are combined to generate an augmented nonlinear descriptor system by using a suitable output feedback. Based on which, an L2-disturbance attenuation simultaneous controller is designed for the two systems....
In this paper, for a discrete-time linear system with model parametric uncertainty and disturbance which are norm-bounded, an output feedback model predictive control (MPC) is considered. This paper applies the procedure of [Dynamic output feedback MPC for LPV systems via near-optimal solution, Proceedings of CCC2011] and the ellipsoidal estimation error set refreshment technique in [Dynamic output...
The paper studies the problem of the disturbance attenuation for switched systems subject to actuator saturation. A nonlinear feedback controller which expresses by the form of quasi-LPV as well as the switching law which is time-dependent, are constructed that lead to the closed-loop switched system is stable and has disturbance attenuation capacity. In addition, the solvability conditions for the...
This paper studies a speed tracking and nonlinear disturbance rejection problem of PM synchronous motor. By formulating the problem as a robust output regulation problem of multivariable nonlinear system, we propose a robust output feedback control law by nonlinear internal model design. It is also worth mentioning that the control law, can not only achieve asymptotic tracking of desired speed, but...
This paper discusses the problem of adaptive stabilization for stochastic feedforward nonlinear systems with time-delay. A universal-type adaptive update law is introduced into the observer and controller to deal with unknown growth rates. With the help of the appropriate Lyapunov-Krasovskii functional and stochastic Barbalat's lemma, it can be proved that the universal-type adaptive output feedback...
In this paper, output feedback control is investigated for a class of uncertain non-affine nonlinear discrete-time systems. Feedback linearization is employed and a novel dynamic linear observer is built based on the measured output information, which can be used to estimate the unknown feedback linearization error. The proposed control is robust to the modeling errors and of great significance in...
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 addresses the disturbance rejection problem for a class of linear systems in the presence of input delay via DOBC approach. Truncated predictor feedback method is applied to deal with the input delay based on the estimate of state and external disturbance, and further endeavours are made to ensure the extra integral terms of the system state and external disturbance due to the input delay...
Many problems arising in communication networks, flexible manufacturing systems, traffic managements, etc., can be modelled as discrete-event systems with maximum and minimum constraints. Such systems can be described by max-min-plus systems in which operations maximization, minimization and addition appear simultaneously. This paper considers the output feedback stabilization policy of a class of...
This paper proposes a distributed adaptive output feedback control scheme for global asymptotic output consensus tracking of heterogenous linear systems involving unknown parameters. The communication status among the subsystems is represented by a directed graph, and the desired trajectory information is available only to a subset of the subsystems. It is proved that by using the proposed control...
An existing bounded controller for position synchronized tracking without velocity measurements is improved in this paper. To attenuate the effect of uncertainty and disturbance involved in system dynamics, an uncertainty and disturbance estimator (UDE) is embedded in the existing bounded tracker by which the nominal closed-loop system is globally asymptotically stable. Then, the conditions ensuring...
The most key component toward an emerging control technology known as active disturbance rejection control is the extended state observer (ESO) which is a systematic design to realize total disturbance estimation via observable measured output. There are, however, two limitations in design of ESO: a) the high gain must be resorted, and closely with b) the derivative of total disturbance is necessarily...
The problem of output regulation by means of partial state and parameters information for the DC-DC converter is addressed. It is shown that the combination of a output feedback controller with the H∞ performance yields a globally asymptotically stable closed-loop system. Finally, the simulation results show the effectiveness of the proposed method.
In this paper, an output regulation problem with unknown-input driven exosystem is formulated and solved for a class of nonlinear plant with unity relative degree. To handle both bounded and unbounded exosystems, we relaxed the asymptotic convergence requirement on the closed-loop state to its associated steady-state and proposed an approximated regulator-equation condition. By using changing supply...
For the system with both polytopic uncertainty and bounded disturbance, an improved off-line approach to dynamic output feedback robust model predictive control for an ellipsoidal estimation error set is considered. To reduce the on-line computational burden, a look-up table is constructed off-line for on-line searching the real-time controller parameters. In the off-line optimization stage, for the...
This paper investigates vibration control problem of a flexible marine riser coupled with the internal fluid dynamics. By applying Lyapunov's direct method, boundary control technique and high-gain observers, an output feedback boundary control is proposed to suppress the vibration of the riser system. With the proposed control, the control spillover is avoided and the stability of the closed-loop...
This paper addresses the problems of output feedback stabilization for a class of nonlinear systems with sampled and delayed measurements. By constructing a continuous observer, a sampled-data output feedback control law is presented to globally exponentially stabilize the nonlinear systems. Transmission delays are also taken into consideration in the observer design and the controller design. The...
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.