The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper provides simulation practitioners and consumers with a grounding in how discrete-event simulation software works. Topics include discrete-event systems; entities, resources, control elements and operations; simulation runs; entity states; entity lists; and entity-list management. The implementation of these generic ideas in AutoMod, SLX, and ExtendSim is described. The paper concludes with...
Network Virtualization (NV) is one of the most promising technique to enable innovation in today's network. A recent approach toward NV has been proposed through FlowVisor, whose aim is to leverage on the specific features of an OpenFlow-controlled network to share the same hardware forwarding plane among multiple logical networks. However, FlowVisor lacks some features to enable a full implementation...
Parallel cascade control structure is commonly used in the operation of process industries to reject disturbances that have a rapid effect on a secondary measured state, before the primary measured variable is affected. The investigations on PID tuning rules for SISO systems are many; however the literature about synthesis methods for designing and tuning cascade control structures appears to be rather...
This paper is concerned with the design of the dynamic neural network based networked predictive controller for Networked control systems with random network delay in both forward and feedback channel. The proposed controller mainly consists of the control prediction generator and network delay compensator. The control prediction generator is used to generate a set of future control predictions using...
Virtual radio space control system is the necessary tendency to spacecraft control Spacecraft control system based on Virtual radio is different from trandkional software radio in the data paralleled transmission and time synchronization. Dynamic time-division multiplexing transmission mode is presented by analyzing the data paralleled and synchronous transmission. The problem caused by traditional...
Bit-stream based control technique uses a uniformly weighted single bit streams to control a system and is a new approach for controller design. This method is ideally suited for field programmable gate array (FPGA) or application specific integrated circuit (ASIC) implementation and offers numerous advantages due to its inherent parallel nature. The present paper proposes the design of bit-stream...
A Wireless Networked Control Systems review is presented. It begins with a brief history about NCS (Networked Control Systems), recognizing the fundamental features, its advantages over other classical control systems, and the protocols that can be used to do control over the wireless network. Also, we deal with the different problems that can affect the network behavior; including interferences and...
This paper introduces a platform for real time simulation and its contribution towards smart grid related research, with focus on Plug-in Hybrid Electric Vehicles (PHEV) charging stations. The current system is able to simulate in real time key elements of a smart grid such as: high speed power electronics, distributed energy resources (DER), and communication networks. A description of the platform...
With the rapid development and implementation of Internet technologies, well-designed/tuned controllers obtained from control design without network are desired, which can be further realized in remote control systems directly. Theoretically, available networked control system (NCS) designs are developed with a known system model and time delay. However, the nature of network-induced delay is unpredictable,...
Locomotive synchronization operation and control(LSOC) system is a train control system based on LOCOTROL technique and GSM for railway (GSM-R) system for heavy haul railway. The current QoS requirements of GSM-R are designed for train control message transmission (TCMT) service of ETCS, which are not suitable for LSOC service with different characteristic. Therefore, the reasonable QoS requirement...
This paper presents a multi-channel Digital Programmable Delay Trigger System (DPDTS) with high accuracy and wide delay range, which can be widely used in laser system and electron accelerator. This DPDTS mainly makes up of reference clock module, user interface and control module and Digital Programmable Delay Trigger (DPDT) module which is implemented on a Xilinx V6LX75T FPGA. In this DPDTS, DDS...
This paper presents a two-gain Iterative Learning Control (ILC) design for nonlinear discrete systems with time delays in state. The convergence of the proposed ILC rule with sufficient condition is derived based on a kind of two-dimensional (2-D) linear inequalities. The proposed ILC rule is able to guarantee convergence of the learning process against fixed iterative initial errors. An example is...
The Internet time-delay tests testify that the time-delay between two random nodes accords with Shift Gamma distribution, which comes to the conclusion that the kinds of the Shift Gamma distribution are limited. Moreover, each kind distribution corresponds to one time-delay on average. Through the method of fitting the sample probability density curve to estimate the parameters of the Shift Gamma...
This paper deals with the output stabilization of time-delay systems with sector-bounded nonlinearity and disturbance. In this paper we will consider the problem of absolute stability for a class of time-delay systems which can be represented as a feedback connection of a linear dynamical system with unknown parameters and a uncertain nonlinearity satisfying a sector constraint. For a class of output...
In this paper we address the problem of efficient control of periodic-review perishable inventory systems. In the considered systems the stock used to fulfill unknown, variable demand deteriorates exponentially, and is replenished with delay from several supply sources. The supply options are characterized by different lead times, spanning multiple review periods. We develop a new supply policy based...
Wireless power transfer technique can be used in many applications nowadays. The main limitation of this wireless power transfer system is in their interface circuitry. In this paper, a highly efficient active rectifier is proposed. By adopting the high speed comparator and, proposed rectifier solved the turn on and off delay of power transistor problem of conventional rectifier and shows high power...
In this paper we present a bandwidth optimization scheduling method based on CAN (Controller Area Network) network. We construct a CAN network structure that contains a BOM (Bandwidth Optimize Manager), which is used to limit the bandwidth occupancy rate of part of control sub-systems, and implement dynamically allocation for network bandwidth resources in the CAN control system. By comparing the...
Due to the introduction of the Internet, enabling the network control system to introduce a delay. Mainly aiming at the fixed delay and the stability of system, this article puts forward the generalized predictive control (GPC) algorithm, and establish a prediction model on the basis of using the ideas of fuzzy control to solve the delay of the network control system. Finally, apply the truetime simulation...
Nowadays flexible power regulation is very important for doubly fed induction generator (DFIG)-based wind turbines to improve power quality and enhance grid stability. This paper proposes an improved predictive direct power control (PDPC) strategy of DFIG to reduce power ripples at low constant switching frequency. Furthermore, the control system is simplified while the robustness of classic direct...
Conditions for the existence of positive stable realizations with system Metzler matrices for proper transfer function are established. A method based on the decomposition of transfer functions into the first, second and third orders transfer functions for computation of positive stable realizations is proposed. A method for computation of positive stable realizations of transfer functions with real...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.