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In this paper the problem of flow control in a multi-source connection-oriented network is addressed. In the considered network the feedback mechanism is provided by control units generated by each source once every M data packets. As the rate may be modified only, when the management unit arrives back at the source with the feedback information incorporated, the transfer speed is changed at irregularly...
Water distribution system is an important urban infrastructure. The security of water distribution system had drawn much attention from companies and research. This paper is going to study the optimization of the off-line and on-line monitoring points to protect the safety of water distribution system. The theory of fuzzy comprehensive evaluation is adopted to evaluate practical accidents of water...
In this paper, a mixed domain interpretation is given for the participation matrix, a MIMO complexity reduction strategy based upon gramians. It is shown that dominant dynamic interactions in stable MIMO linear systems can be captured using a time domain characterisation and, via Parseval, a frequency domain interpretation. The approach can be applied to stable continuous-time, as well as discrete-time...
This paper proposes a new design method of a GPC-based PID controller. The proportional gain of a PID controller is time-varying, and the PID controller is designed using the future reference input. Hence, a GPC law can be approximated by the PID controller finely. Because a controller of GPC has to be stable to obtain stable proportional gain, using extended GPC using coprime factorization, the PID...
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 control...
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 system...
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...
This article presents a controlling hierarchy over the action of a virtual actor including run-time control, path point control, destination point control and script language control. The path point control realizes the actor animation via setting the path points in virtual environments and selecting actions at those points. The destination point control employs global path planning to disseminate...
In this paper we use a previously developed RED (random early detection) model to analyze and develop a quantitative approach of defining one of the RED parameters, average queue weight, while the network load level varies. First, we introduce the linear control system and the pre-developed RED model. Based on this model, we next develop a proposition aiming at the RED parameter, average queue weight,...
Recently, Multitask learning, which can cope with several tasks, has attracted much attention. Multitask Reinforcement Learning introduced by Tanaka et al is a problem class where number of problem instances of Markov Decision Processes sampled from the same probability distributions is sequentially given to reinforcement learning agents. The purpose of solving this problem is to realize adaptive...
MATLAB is a software simulator which is good for simulating the mathematical modeling and feedback control, while OPNET is a software tool which is good for simulating the network communication behavior. However, currently simulating the communication behavior of a wireless ad hoc network within MATLAB is difficult, where complex queuing models in OPNET are also difficult to create and manipulate...
The accuracy of rotor position estimation in the conventional signal injection based sensorless control of permanent magnet brushless AC drives depends on the load current. This paper proposes an improved method, which significantly reduces the estimation error by accounting for the cross-coupling effect between the d-and q-axes. The conventional and proposed methods are described and their performance...
Communication networks are usually managed with network-oriented objectives such as throughput and latency. However, in military networks, these objectives are inappropriate; instead, objectives should be oriented to the mission and network stakeholder perspectives. A satisfactory objective function must exhibit the following characteristics: (i) operationally meaningful, (ii) sufficiently flexible,...
This paper investigates the simulation of distributed wireless networked control systems (WNCS) over mobile ad-hoc network (MANET). The simulation model includes multiple plants with a single controller and random node mobility. The widely used network simulation software optimised network engineering tool (OPNET) has been utilised to implement a realistic wireless signal propagation model using path...
Over the past few years, much research attention has been afforded to the application of remote patient monitoring using embedded mobile devices. However, relatively little research has been done to investigate the security aspects of such scenarios. The present work describes the implementation of a cryptographic algorithm based on elliptic curves on an embedded mobile device useful for healthcare...
Since the 1980's, Petri nets (PN) have been widely used to model automated manufacturing systems (AMS) for analysis, performance evaluation, simulation, and control. They are mostly based on process-oriented modeling methods and thus termed as process-oriented PN (POPN) in this paper. The recent study of deadlock avoidance problems in AMS led to another type of PN called resource-oriented PN (ROPN)...
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 are...
This paper investigates the motion generation for a pendulum-driven cart-pole system. The dynamic model of this system is developed by using the Newton's law. A six-step motion strategy is simulated by using MATLAB/SIMULINK. The pendulum is driven by an open-loop controller to track the desired pendulum angular velocity profile. The optimal configuration which based on the profile is addressed under...
A new velocity and position sensor concept for manned and unmanned ground vehicles is proposed. The idea of this system is to temporarily place artificial markers in the environment such as the surface the vehicle is maneuvering over [23-25]. Once the markers are placed in the environment, they have zero speed, i.e. they represent the speed of the environment over which the vehicle is traversing....
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