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Aiming at the problems about the drum pressure of the boiler combustion system has the time varying and time delay characteristics, it's difficult for traditional PID (Proportion Integration Differentiation) control to meet the demands of the control problems, a new control algorithm named ITGC (Intelligent Track Guiding Control) was proposed in this paper. Based on traditional PID control algorithm,...
This paper addresses the problem of observer design for a class of uncertain nonlinear time-delay systems. A finite-dimensional adaptive observer is proposed based on Lyapunov-Krasovskii functional method and neural-networks-based approximation technique. The designed observer guarantees that all signals in the closed-loop system are bounded and the estimation error decreases to zero asymptotically...
This paper considers the problem of global output feedback stabilization via sampled-data control for a class of uncertain nonlinear systems subject to time delays. The system satisfies a lower-triangular linear growth condition with unknown growth rates. A new inductive method is first introduced to estimate the state growth in the presence of time delays and non-varnishing nonlinearities. When only...
This paper is concerned with the mean square exponential (MSE) synchronization problem for the multi-agent systems with time delays over uncertain networks, where the uncertainty lies in that the links between subsystems are varying stochastically according to certain rules. Firstly, applying the theories of coordinate transformation, Kronecker product and Laplacian matrix, the synchronization problem...
In this paper, we study the problem of stabilizability of the nonlinear switched system with time-delay in switching signal. Firstly, some new concepts of locally and globally asymptotical or exponential stabilizability with respect to state feedback and switching law are given and then, using the method of Lyapunov function and delay inequalities, some sufficient conditions are obtained which can...
In this paper a discrete-time domain 2DOF design method is proposed for industrial stable processes with input time delay, based on a recently developed two-degree-of-freedom (2DOF) control structure. The setpoint tracking controller is analytically designed based on the H2 optimal control principle, and another controller for load disturbance rejection is derived by proposing the desired closed-loop...
This paper investigates the pth moment exponential stability of stochastic bidirectional associative memory (BAM) neural networks with time delays and impulses based on the stochastic differential equation theory and norm approximation theory. By estimating the solutions of stochastic differential equation, some criteria ensuring the BAM neural networks stability are obtained. Different from some...
Proportional-integral-proportional-derivative (PI-PD) control is a modified PID control and can get improved control performance. However, limited by the complex controller parameter tuning, the PI-PD control is used in a limited scope. In order to deal with this condition, a new PI-PD control design using PFC optimization is proposed in this paper. The proposed method not only inherits the advantage...
Force reflection methods are widely used in teleoperation with force sensors on slave manipulator. However, force sensors would impair manipulator structure and may be installed or maintained difficultly on slave site. Additionally, in some tasks operator pays more attention to control the exerted force on environment than to fell the reflection force. Considering these factors, a force sending method...
This paper investigates the H∞ control problem for a class of wireless networked control system (NCS). Both time delays and packet losses are considered simultaneously in the wireless communication networks. Under some assumptions, a switched system model with time-varying delays is established to describe the closed-loop system, by which the effect of packet losses is dealt differently from time...
The safe and stable control of modern large-scale wide-area power systems is quite important for the economical operation of power systems. Recently, it has received much research attention. In this paper, we aim to give a survey on the communication and control of wide-area power systems. Communication constraints, NCS modeling of wide-area power systems and stability analysis and coordinated control...
Formation-containment analysis and design problems for high-order time-delayed linear time-invariant swarm systems with directed interaction topologies are studied respectively. Firstly, protocols with time delays are presented for leaders and followers respectively, where the formation for leaders can be time-varying. Then formation-containment problems for time-delayed swarm systems are transformed...
Guaranteed-cost output consensus problems for high-order linear descriptor swarm systems with communication delays are investigated. Firstly, the guaranteed-cost output consensus problem for time-delayed descriptor swarm systems is proposed, where it is required to realize the tradeoff design between control energy consumptions and output consensus regulation performances. Then, guaranteed-cost output...
The group consensus problem of nonlinear multi-agent systems with delayed Lurie-type dynamics is investigated in this paper. A pinning control scheme is designed under undirected communication graph. Firstly, a sufficient condition in terms of linear matrix inequalities(LMIs) is obtained to guarantee the group consensus in the multi-agent systems without disturbance. Then, a sufficient condition guarantee...
Load frequency control is an important measurement to ensure the safe and economical operation of power system. In this paper, by taking into account the random disturbances brought by the renewable energy resources, the robust load frequency control problem for interconnected power systems with time delay is considered in detail. Considering the signal transmission delay, two controller designing...
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