2007 IEEE International Conference on Networking, Sensing and Control

How does network centric organization of sensors affect time critical fusion of dynamic spatial-temporal events in urban environments? This question has become more pertinent today as sensor networks enable automation that holds the promise of monitoring and localizing terrorist threats in complex urban environments by harnessing the power of many inexpensive electromechanical devices like cameras... View full abstract»

As both the cost and size of wireless sensor network (WSN) nodes decreases, the scale on which these networks can be deployed will increase dramatically. However, human-centric management of such large-scale networks will be both costly and slow. Without automated or self-management, WSNs will not be able to grow to achieve their potential size and function. The concept of self-managing systems is... View full abstract»

Orthogonal frequency division multiplexing (OFDM) is a promising technology for high data rate transmission in wideband wireless systems for achieving high downlink capacities in future cellular systems. In this paper, first each user is assigned one subcarrier (channel) with best channel-to-noise ratio for the channel and random power for each channel. The goal is to minimize the overall transmis... View full abstract»

In recent years, the wireless sensor network (WSN), which has a good application prospect in both civil and military fields, has received increasing attention. But due to the particularity of the WSN, the traditional network routing protocol is not suitable to it. There is a great need for new routing protocols for the WSN. For WSN, the network node energy is usually limited, so how to save and ev... View full abstract»

The performance of Sensor Area Networks varies in terms of data reliability, resilience to node failure, data throughput and end-to-end communication latency. It is required to optimize the topology for a static communication Backbone. It is suggested that Centrality metrics that are taken from social networks such as Betweenness and Closeness may be used as criteria for optimization. Preliminary ... View full abstract»

Wireless Sensor Networks (WSNs) collect information about the physical environment aiding to a wide variety of applications ranging from target detection to monitoring of harmful chemical gases. The drive to scale down the system size and cost has resulted in constraints in the quality of components. Reliable and accurate performance of sensors is necessary in critical applications. In this paper,... View full abstract»

The supervisory software has widely been applied in various areas for many years. This paper introduces the design of supervisory software which is a part of a practical implementation platform for the ethernet-based control systems. The software architecture is presented in which a client/server structure is constructed to deal with the case where there are many users who want to access the syste... View full abstract»

In this paper, we discusses a new networked control systems (NCS), embedded Ethernet control system (EECS). Compared with traditional NCS, EECS has many different features. Network nodes of EECS are often not PCs and workstations, but smart controllers with sensors and actuators based on cost-effective high-performance micro-controller solution for embedded systems, which can run complex embedded ... View full abstract»

The paper analyzes characteristics of Ethernet and embedded microprocessor, discusses the hardware structure design (modularization design) of a test platform for networked control systems, which is named NetCon. A networked brushless DC motor control experiment is made using the platform. From the experiment, it is shown that NetCon has a trustworthy reliability and validity. Furthermore, NetCon ... View full abstract»

Random time delay and frequency data dropout can degrade the performance of networked control systems and even cause system instability. Liu et al. (2004) introduced a networked model based predictive control scheme to tackle this problem. In his method, a set of control sequences for every possible delay time are packed together and sent to the plant side, and on the plant side the relevant contr... View full abstract»

This paper is concerned with a simplified GPC algorithm of networked control systems. Networked predictive control is recently used to cope with the random and uncertain time delay induced by network transmission. Instead of predicting a set of control sequences at one sampling period in former networked predictive control systems, a simplified generalized predictive control (GPC) algorithm is pre... View full abstract»

The appearance of the switched Ethernet opens up the use of Ethernet as a reliable deterministic communication technology. Comparing with traditional Ethernet, the real-time characteristic of the switched Ethernet is more advanced because it provides a private collision domain to each port of a switch to avoid collisions. Based on the two embedded ARM controllers connected over the switched Ethern... View full abstract»

Control of linear systems with unknown input hysteresis is a challenging task and is receiving increased attention in recent years. Many hysteresis models have been proposed in the literature, but the challenge is to determine how to integrate these models with available control techniques to ensure system stability. Such a possibility is by using the Krasnosel'skii-Pokrovkii (KP) hysteresis model... View full abstract»

In the last decade, fault tolerant controls (FTC) have enjoyed tremendous success to effectively accommodate defects in sensors, actuators, or plants. However, little of them considered what should be done once a control system performance is degraded during the operation. The aim of this paper is to maintain the performance of a control system at an acceptable level based on a pre-defined referen... View full abstract»

This paper studies the controller structure selection problem for large multivariable systems. Current approaches to this problem either rely on the control engineer's experience and intuition, or solutions of very difficult and non-convex combinatorial optimisation problems. In this paper new computationally inexpensive analysis tools are presented which provide the control engineer with a comple... View full abstract»

An incremental sliding mode controller (ISMC) for a class of large-scale underactutated system is proposed to achieve asymptotic stability and favorable decoupled performance. The large-scale underactuated system includes several subsystems. Firstly, two state variables of a subsystem are chosen to construct the first-layer sliding surface. Secondly, the first-layer sliding surface and one of the ... View full abstract»

An intelligent control system for thermal processing of natural biomaterials, based on machine vision, sensor fusion and neural network was developed. Experiments with ginseng drying showed advantages of machine vision for real-time imaging of morphological, colour and texture attributes, providing sufficient discriminatory information about biomaterial moisture and quality in the range of 3.2-0.1... View full abstract»

Control allocation problem is the key of cooperation control systems and has attracted a lot of attention of researchers. This paper proposes a nonlinear control allocation framework to provide a common optimal solution for decentralized cooperation control systems. The framework includes the allocation controller and feedback control law. In which, the allocation controller is designed to realize... View full abstract»

Current research efforts on inventory management mainly focus on operational decisions and inventory control. In this research, a framework is proposed for incorporating financial considerations including delayed cash payment, receivable into multi-period inventory models. Specifically, we characterize dynamic financial constraint that is updated periodically according to production activities. Th... View full abstract»

When users access a Web site, the access of the users represents the interest of the users in the Web pages of the Web site. Each user's preference can be manifested by the sequence of access sequence. After identifying each user's access transactions and defining a similarity measure between two transactions, the access paths of all the users can be clustered. This is called path clustering. In t... View full abstract»

This paper is concerned with the controller design for networked control systems (NCSs). We employ a model of the NCSs taking into consideration the network-induced delay and the data packet dropout at the same time. On the basis of the given model, a controller design method is proposed by using the delay-dependent approach. An appropriate Lyapunov functional candidate is proposed to lead to the ... View full abstract»

On the basis of hyperstable theory and adaptive inverse control theory, a new adaptive recursive filters identification algorithm of eliminating the disturbance is proposed in this paper, the algorithm not only simplifies the design of linear compensator and parameter change, but also reduces calculation and it can simplify the structure. Simulations that confirm the utility of the new algorithm a... View full abstract»