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.
An adaptive feedback control method is presented for the speed control problem of internal combustion engines. It is shown that for the mean-value engine model with the intake-to-power delay, the proposed feedback speed controller satisfies the design objective, and a simplified extension for the control design with adaptive control action is shown to be effective in accounting for uncertain system...
This article discusses the Lyapunov-Krasovskii functional method for the stability problem of coupled differential-functional equations with distributed delays and one discrete delay. However, systems with distributed delays and multiple commensurate discrete delays can be easily transformed to the standard form treated in this article. This standard form represents a very general class of time-delay...
In this paper, necessary and sufficient conditions for the approximate controllability of a large class of neutral systems in reflexive Banach spaces in investigated. The approach is based on the transformation of such systems into appropriate boundary control systems.
In this article, we are concerned with the stabilization of a one-dimensional Schrödinger equation with boundary control and observation. The boundary observation is suffered from an arbitrary given time delay. We first show that the proportional output feedback control that stabilizes exponentially the time delay free system makes the corresponding time delay system unstable.We then use the observer...
The paper discusses the H∞ preview control problem. We apply simple tools such as completion of square to solve the problem. The sufficient and necessary condition under which the finite-horizon problem is solvable is provided and is actually the inertia condition reflecting the aftereffect from the disturbance. Different from existing results, the proposed controller is given by a Riccati equation...
The design of Proportional-Integral Observer (PIO) for time-delay systems is considered in this paper. First, a method for PIO design is proposed to attenuate the disturbance to a pre-specified level while estimating the state of the delay system. The method guarantees the stability of the observer and minimizes the Hinfin norm between the disturbance and the estimated error. An alternative design...
Delay approach to continuous-discrete observer design for Lipschitz nonlinear systems is discussed. First, the convergence conditions of the nonlinear observer with a linear output correction are established in terms of linear matrix inequalities. In the second part of this note, new matrix conditions are derived to ensure the convergence of the hybrid observer with both linear and nonlinear correction...
A new paradigm of digital signal processing has recently been proposed in view of sampled-data control theory. This filter, called sampled-data H∞ filter, approximates a linear phase characteristic in continuous-time domain, that is, a pure delay. By this property, we propose a new repetitive controller including the sampled-data H∞ optimal filter. Moreover, to achieve the stability, we introduce...
This paper is concerned with the robust Hinfin filtering problem for a class of uncertain nonlinear networked systems with both multiple stochastic time-varying communication delays and multiple packet dropouts. The discrete-time system under consideration is also subject to parameter uncertainties, state-dependent stochastic disturbances and sector-bounded nonlinearities. Sufficient conditions are...
The Hinfin control problem is studied in this paper for networked control systems (NCSs) with short time-varying delays. By considering state feedback controllers, the closed-loop NCS is described as a discrete-time linear uncertain system model, and the uncertain part reflects the effect of the variation nature of the network-induced delays on the system dynamics. Then, a sufficient condition is...
In Networked Control Systems, delays are unavoidable. Moreover, loss of data should be taken into account. Smith-like predictor is the most common approach to cope with delays, but open loop stability is required to ensure internal stability. Some recent results allow dealing with these systems, if a SISO structure is concerned. In this paper, the design of a predictor-observer for possible unstable...
This paper is concerned with the estimation of the domain of attraction for a class of linear continuous-time systems subject to both interval time-varying delay and actuator saturation. A new type of delay-range-dependent condition is firstly proposed using the free-weighting matrix technique to derive a tighter upper bound on the derivative of a Lyapunov-Krasovskii functional. Based on it, a state...
In this paper, we maximize the allowable delay bounds that guarantee the stability of Takagi-Sugeno (T-S) fuzzy systems with time-varying delays, by adopting fuzzy weighting-dependent variables for the system dynamics elimination and the integral inequality lemma. The resulting quadratic Parameterized Linear Matrix Inequalities (PLMIs) are further relaxed by introducing some free variables to exploit...
This paper is concerned with the stability analysis of Takagi-Sugeno fuzzy dynamic systems with constant time delay. A new delay-dependent asymptotic stability condition for the system is derived by using a novel quadratic Lyapunov-Krasovskii functional, which is constructed by uniformly dividing the delay interval into multiple segments and choosing proper functional with weighted matrices for each...
Control over the network is a popular approach to control complex and distributed systems. However, delays are induced by the network, leading to the degradation in control performance. To analyze the characteristics of these delays, experiments are conducted to collect and to analyze the round trip time (RTT) between Beijing and Hong Kong. These results are presented in this paper. Large surges with...
This paper deals with the problem of dissipative control for a class of Ito-type stochastic systems with time varying delays. We consider the design of a state-feedback dissipative controller based on Lyapunov-Krasovskii functional approach such that the closed-loop systems is exponentially stable in the mean square and strictly (Q, S,R)-dissipative. The sufficient conditions are obtained by using...
This paper investigates stability analysis for linear systems with Markovian jumping parameters and state delays. Based on delay subinterval decomposition approach, a new Lyapunov-Krasovskii functional is proposed to develop the delay-dependent stochastic stability conditions for both nominal and uncertain time-delay Markovian systems. The results are formulated in terms of linear matrix inequalities...
This paper is concerned with robust stability of uncertain linear systems with interval time-varying delay. The time-varying delay is assumed to belong to an interval and the derivative of the time-varying delay is upper bounded but otherwise arbitrary. The uncertainties under consideration include polytopic-type uncertainty and linear fractional norm-bounded uncertainty. In order to obtain much less...
We consider the problem of state estimation of a discrete time process over an unreliable communication network. Most previous work in literature focus on either quantization effect or packet drops or delays, with a few work considering those uncertainties simultaneously. In this paper, we first present two quantized filter design methods based on a logarithmic quantizer. The first method characterizes...
The experimental implementation and validation of a localization system based on a heterogeneous sensor network is described. The sensor network consists of ultrasound ranging sensors and Web cameras. They are used to localize a mobile robot under sensor communication constraints. Applying a recently proposed sensor fusion algorithm that explicitly takes communication delay and cost into account,...
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.