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For the TAI (International Atomic Time) Calculation of two-way satellite time and frequency transfer (TWSTFT) is based on a geostationary orbit satellite and KU band time transfer. Effect of time transfer precision of many factors: the modem time delay, the uplink and downlink path delay, the time delay of satellite transponder and Sagnac time delay etc. Limited by domestic satellite resource, we...
Vision-based active safety and driver assistance systems, such as lane departure warning (LDW) system, have increasingly gained popularity in automotive applications due to their fairly good performance at relatively low cost. Lane detection is a very complicated and time-consuming process and the potential time delay resulting from current image capturing and image processing can potentially impact...
A novel robust tracking control technique for time-delay systems with uncertain time-delays based on fuzzy T-S is presented. Fuzzy T-S model with parametric uncertainties is employed to represent the uncertain time-delay plant. This control synthesis design is shown reduce the tracking error considerably for all bounded reference inputs while guaranteeing the H∞ performance. The proposed solution...
In networked control systems, the network uncertainties can degrade the control performance and even result in instability, especially for the Internet-based control system with wireless communication in which the transmission delay could be many times of the sampling period of control systems. NPC (Networked Predictive Control) is an active method to compensate for the effects of network uncertainty...
By analyzing the signal lings exchange of SIP deeply, GSPN model of protocol is established for evaluating the performance of protocol, reducing call setup time of SIP and obtaining a tradeoff between the performance and the number of buffer. Basing on the model, markov chain of model is designed. Based on properties of constructed markov chain, performance of SIP is studied and evaluated through...
Ant colony optimization (ACO) is a kind of new type heuristically optimizing algorithm, having ability to organize itself. In order to solve the problem that QoS routing faces while study at present, this paper proposes a new QoS routing algorithm based on an improved ACO which introduces a routing quality based parameter adaptive mechanism. Simulation results demonstrate that the algorithm has a...
Ethernet is finding increasing application in industrial environments as a replacement for conventional field bus systems. The key technical obstacle of Ethernet for industrial application is that its non-deterministic behavior makes it inadequate for real-time application. In order to solve these problems, this paper investigates the observer-based H¡Þ control problem of networked control systems...
This paper proposes a novel relay selection protocol for distributed cooperative networks, that eliminates the effect of asynchronism between different received signals. The suggested protocol maintains a high diversity order, with minimum message complexity and overall time delay, and it also provides a better performance in terms of power consumption and error rates than existing selection protocols...
Advanced regulation machine (ARM) is determined to make the perfect parameters (AIFS, CWmin and CWmax) selections in the wireless networks platform. The simple but effective adjustment strategies of three parameters combinations are proposed with the priority theory to obtain the acquired high quality of service (QoS). The internal competitions models of various traffic analysis machines are delivered...
For networked control systems (NCS), the network-induced time delay with uncertain nature may degrade the control performance and even destabilize the system. Therefore, it is necessary to study the strategies to compensate time delay. In order to effectively restrain the impact of network time delay, a single neuron PID controller combined with adaptive Smith predictor is proposed to achieve better...
In this paper, we study the existence of positive periodic solutions for a predator-prey diffusive system with delayed density restricts and stage structure. One bounded open sets are obtained by using analytic technique and a set of sufficient conditions for this system to have at least one positive periodic solution is obtained. The phenomenon is revealed that when the carrying capacity of prey...
A three-stage-structured prey-predator system with predator density dependent time delay is considered. The positive and uniformly bounded of the solution of the system are obtained, and the conditions for the system occurring global Hopf bifurcation is given. Finally, numerical simulations and brief conclusion are given.
Based on nonlinear coupled algorithm, consensus problem of first-order multi-agent systems with time-varying input delay is investigated. Firstly, by utilizing Lyapunov theorem and LaSalle invariance principle, sufficient consensus condition for the multi-agent systems is obtained when the directed interconnection topology is strongly connected. Secondly, the above conclusion is extended to the case...
In this paper, the problem of impulsive synchronization of a kind of generalized complex dynamical systems with delay and derivative coupling is investigated. Both the communication delay and derivative coupling, which provide more information about the complex dynamical systems, are considered. Based on a new Lyapunov function and impulsive stability technique that is used to play an important role...
This paper is concerned with robust H∞ control of uncertain networked control systems with interval time-varying delay and packet dropout. For less conservative transformation, we propose a new integral inequality by dividing time interval into two subintervals and defining an appropriate scalar instead of introducing free weighting matrix. Based on this integral inequality, a new delay-dependent...
In this paper, bilateral teleoperation control is proposed for holonomic constrained robotic manipulators with stochastic time-varying delays in communication channels. A unified control model is introduced for representing well-known holonomic systems with an environmental constraint. By integrating Markov jump systems, the motion/force tracking control strategy is developed. Furthermore, a feasible...
This paper gives new contributions to the area of non-Lyapunov (finite time stability, technical stability, practical stability, final stability) for the particular class of linear discrete time delay systems. The idea of attractive practical stability is introduced for the first time. Moreover, based on the matrix inequalities and Lyapunov-like functions, some new sufficient conditions under which...
In this paper, the problem of exponential stabilization for a class of nonlinear systems with interval discrete and distributed time-varying delays is studied. The time delay is a continuous function belonging to a given interval. Based on the constructing of improved Lyapunov-Krasovskii functionals combined with Leibniz-Newton's formula, new delay-dependent sufficient conditions for the exponential...
The problem of global robust periodicity is studied for a class of neural networks with norm-bounded parameter uncertainties and multiple time-varying delays. Some linear matrix inequality (LMI) representations of delay-dependent periodicity criteria are presented to guarantee the existence, uniqueness and global asymptotic stability of periodic solution for all admissible parametric uncertainties...
In this paper, the problem of exponential stabilization of neutral-type neural networks with various activation functions and interval non-differentiable and distributed time-varying delays is considered. The interval time-varying delay function is not necessary to be differentiable. By constructing a set of improved Lyapunov-Krasovskii functional combined with Leibniz-Newton's formula, the proposed...
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