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The problem of variable structure guaranteed cost control for discrete uncertain networked systems with time delay has been considered in this paper. Based on the Lyapunov stability theorem, by introducing a discrete compensator, a novel sliding mode manifold that can compensate time delay has been designed. Then, by using linear matrix inequalities approach, a guaranteed cost controller is designed...
The sense amplifier circuit is a very important part of the memory. It is used to access the stored data in bit cell during read cycle. Sense intensifier enhances the little distinction between bit lines to the full swing level. Its execution influences the get to time and power dissemination of memory and henceforth by lessening the detecting deferral and power utilization of sense speaker the execution...
In this paper, we present a delay-optimal packet scheduler for processing the M2M uplink traffic at the M2M application server (AS). Due to the delay-heterogeneity in uplink traffic, we classify it broadly into delay-tolerant and delay-sensitive traffic. We then map the diverse delay requirements of each class to sigmoidal functions of packet delay and formulate a utility-maximization problem that...
Recent years, with the emerging technology of cloud computing, the powerful computing and storage capability of cloud computing injects new vitality into wireless sensor networks (WSNs) and motivates a series of new applications. However, the data delivery from WSNs to Cloud becomes a bottleneck because of the poor communication ability of WSNs, especially for delay-sensitive applications, which limits...
Internet of Things (IoT) is considered to be the next revolution in the field of wireless communications. This concept involves mapping of physical world to virtual (cyber) world. It is achieved by interconnecting devices having sensing capabilities using unique addressing scheme and passing their collective information to the IoT cloud. However at present, these devices belonging to different technologies...
In Wireless Sensor Networks (WSNs), energy conservation is one of the main concerns challenging the cutting-edge standards and protocols. Most existing studies focus on the design of WSN energy efficient algorithms and standards. The standard IEEE 802.15.4 has emerged for WSNs in which the legacy operations are based on the principle that the power-operated battery is ideal and linear. However, the...
Industrial application of wireless sensor networks require timelines in exchanging messages among nodes. IEEE 802.15.4 is a standard to address the need for low-rate low-power low-cost wireless networking. In wired connection, the components such as actuators or sensors provides high performance besides wired links consist of many mechanical problems. Hence to achieve low latency, high performance...
Wireless Sensor Network (WSN) is a collection of large number of sensors with low-power transceivers effectively used for collecting data in various applications like environmental monitoring, healthcare, civil and military applications. Efficient data transmission protocols are required to reduce transmission delay and energy of sensors to increase lifetime of sensor nodes. Recent researches in WSNs...
A volcano monitoring system plays a key role for launching emergency early warning, and the use of alternative technologies have proven their effectiveness in this setting, which is the case of wireless sensor networks. For surveillance systems, the real-time requirement is mandatory due to the need for immediate access to the signals derived from a natural disaster where the goal is safeguarding...
This article mainly deals with the control and stability problems of networked Hammerstein with nonlinear input. A novel predictive controller design method is proposed to offset the effect of network delay and data dropout. The controller gain which depends on the time delay of the feedback channel is time-variant. Since we assume that the state is not measurable, the control signal is based on the...
Several localization techniques have been proposed to identify the exact location of sensor nodes. Localization is important for computation of many applications such as routing in wireless sensor network. Energy preservation is a challenge in wireless sensor network and many algorithms have already been proposed. The localized node lifetime is maximized by using energy-efficient routing, use of minimum...
Wireless sensor and actor networks require efficient coordination mechanisms to perform reliable actions in the physical world. In this paper, an energy and delay aware three-level coordination mechanism is proposed for wireless sensor and actor networks using twolevel hierarchical k-hop clustering algorithm. An optimal number of actors are calculated based on the network area and number of sensors...
Sub-threshold operation of circuits becomes more and more attractive due to the ultra-low power consumption. Static Random Access Memory (SRAM) faces an important limitation in read access time that prevents high frequency operation and the possible applications. The read access time under ultra-low voltage (ULV) operation is mainly dictated by the read current of the SRAM bit cell and the bit line...
Routing schemes in Delay Tolerant Networks depend on the intermediate nodes to carry messages till the forwarding of the messages to other nodes or delivery of the messages to their destinations. Thus, efficient and faster spreading of messages is essential to reduce the delay of sending a message from source to destination. In this work, we aim to design a new agent aided routing scheme in Delay...
Due to the rapid growth of power demand, the aging problem of transmission lines becomes serious and has caused many problems to electric utilities and customers in terms of system reliability, power quality and customer satisfaction. In order to efficiently monitoring the power transmission system, a large number of sensors are deployed on the transmission line to form a Power Line Sensornet (PLSN)...
This study extends the concept of capillary valve to realize a micro time-delay switch for safety and arming application. The presented device consists of working fluid (Glycerol), micro capillary valve with required time-delay mechanism design, and sensing electrodes. Thus, the delay time could be easily changed by (1) varying the geometry design of valve angle β and the neck-width w, and (2) selecting...
In this paper, a modified hybrid-mode sense amplifier (SA) for low power SRAM applications is being proposed using CMOS 180 nm technology. In order to overcome the observed limitations of the conventional hybrid-mode SA in terms of the sensing delay, the data line (DL) split has been made faster by partially blocking the bit line (BL) discharge in the proposed topology. The modified SA circuit has...
The notion of practical relative degree is proposed, which generalizes the standard relative-degree notion for the cases of uncertain systems lacking a reliable mathematical model. Practical output regulation is ensured. Computer simulation and practical results confirm the theoretical approach.
A new architecture for model-based control of unstable and uncertain systems with network induced delays, and for set-point tracking over networks, is presented in this paper. This setup provides better performance than similar approaches in terms of steady-state tracking error and reduction of network traffic by transmitting measurement updates only when necessary. The results in this paper also...
Characterizing the network delay distribution is a fundamental step to properly compensate the delay of Networked Control Systems (NCSs). Due to the random backoff mechanism employed by Wireless Personal Area Network (WPAN) protocols, it is difficult to derive such a distribution. In this paper, the probability distribution of the delay for successfully received packets in WPANs is characterized....
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