H 2 / H ∞ filtering for networked systems with data transmission time-varying delay, data packet dropout and sequence disorder

Intl J Robust & Nonlinear

2019

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Summary This paper investigates the consensus issue of multiagent systems with data transmission time delay. The state measurement of each local agent is directly sent to a private event‐trigger and further authorized to be broadcasted to its neighbors via communication network only when the threshold of the event‐trigger is violated. Since the controller always receives discrete‐time neighbor information with data transmission time delay, a predictor is employed to estimate the continuous‐time neighbor state. Based on the estimated state, a novel consensus protocol is mainly proposed for achieving the bounded consensus of the multiagent systems. By the proposed method, the asynchronous neighbor information is allowed and the margin of data transmission time delay is also given. Furthermore, it has been proved that the unwanted Zeno phenomena can be naturally excluded. Numerical example is provided to demonstrate the effectiveness of the proposed method.

“…However, because the discrete‐time measurements

x_{i} false(t_{k_{i}}^{i} false)

and

x_{j} false(t_{k_{j}}^{j} false)

Section: Consensus Under Event‐trigger and Data Transmission Delaymentioning

confidence: 99%

Section: Event-triggered Consensus Protocolmentioning

confidence: 99%

Bounded consensus for multiagent systems by event‐triggered data transmission, time delay, and predictor‐based control

Intl J Robust & Nonlinear

2019

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“…Since the controller receives null information, thus the actuator has no input control command, consequently, the actuator probably performs alternative movements that arises probability of facility fault and risks component life-cycle. For overcoming the above issue, a zero order holder (ZOH) is employed, which has a capability of storage the latest non-null data (Cui et al, 2017; Garcia et al, 2014; Zhu et al, 2014).…”

Section: Problem Formulationmentioning

confidence: 99%

Event-triggered uniform ultimate bound control for linear systems with time-varying delay

Transactions of the Institute of Measurement and Control

2019

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This paper investigates an effective event-triggered control for linear systems with time-varying delay. For reducing the sampled data transmission amount, a novel event-trigger is proposed wherein a state-independent threshold is involved. For guaranteeing uniformly ultimately bounded stability, an event-triggered feedback control law is proposed. By aid of a new free-weight matrix technique, the event-trigger and control co-design method is conveniently obtained. By pre-specifying the threshold of the event-trigger, the event-triggered frequency and the ultimate state convergence region can be simultaneously regulated. In addition, the convergence rate of closed-loop system is pre-specifiable as well. More significantly, the minimal event-triggering time interval is given. During that time interval, the event-trigger can not be violated, thus the Zeno phenomena is excluded naturally. Numerical examples are provided to demonstrate the effectiveness of the proposed method.

“…In real‐world NCSs, the information exchanged by communication networks are mostly transmitted in some packets, and they may be lost because of quantization, failures, communication interference, congestion, and so forth 10‐13 . To deal with the fact that, in the context of NCSs, the control strategies need to not only guarantee system stability but also tolerate the packet loss 14‐16 …”

Section: Introductionmentioning

confidence: 99%

“…[10][11][12][13] To deal with the fact that, in the context of NCSs, the control strategies need to not only guarantee system stability but also tolerate the packet loss. [14][15][16] Besides, another considerable imperfection of communication network is known as the capacity limitation, it often emerges because the network bandwidth is always bounded and results in capacity limitation of the packet transmission…”

mentioning

confidence: 99%

Dual event‐triggered control for linear systems with consecutive packet losses

Intl J Robust & Nonlinear

2021

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This article investigates an event‐triggered control for linear continuous‐time systems by tolerating consecutive packet losses. Two event‐triggers are, respectively, employed in the sensor‐to‐controller and controller‐to‐actuator channels in order to reduce the data transmission pressures. A simple discrete‐time state feedback control law is proposed and the control command is only updated when the actuator successfully receives the command information. By the proposed method, the event‐triggers are proved to be maintained or violated consecutively. The appropriate data sampling period and the maximal allowable packet loss numbers can be quantitatively determined. In addition, it is also proved that the event‐trigger in controller‐to‐actuator may not be violated immediately with the event‐trigger in sensor‐to‐actuator. The uniform ultimate bound of the closed‐loop system can be achieved. Finally, numerical examples are provided to demonstrate the effectiveness of the proposed method.