A Simulation Platform for Dynamic Positioning Ship with Guidance, Navigation and Control Function

2013 ◽  
Vol 303-306 ◽  
pp. 1158-1161
Author(s):  
Xing Yan Sun ◽  
Ming Yu Fu ◽  
Xiao Cheng Shi ◽  
Yu Shi Wei
Keyword(s):  
Control Function ◽  
Feedback System ◽  
Dynamic Positioning ◽  
Simulation Platform ◽  
Environment Modeling ◽  
Control Functions ◽  
System A ◽  
Navigation And Control ◽  
Loop Feedback ◽  
And Control

In order to study the whole system performance of dynamic positioning ship, a simulation platform which contains environment and ship model, as well as basic guidance, navigation and control functions is established. Besides the ordinary ship and environment modeling, a guidance method for waypoint following is designed by using path interpolation and circle of acceptance. A sensor-fusion based federated filter is proposed to deal with the problem of state estimation and wave filtering. To make the whole system becomes a closed loop feedback system, a PID method are applied to deal with the control problem. By using this simulation platform, this paper simulates and studies the basic functions of a typical dynamic positioning ship. Finally, the simulation proves the validity and excellent performance of this dynamic position ship simulation platform.

ROUTING IMPLEMENTATION BASED-ON SOFTWARE DEFINED NETWORK USING RYU CONTROLLER AND OPENVSWITCH

2016 ◽  
Vol 78 (5) ◽  
Author(s):  
Yuli Sun Hariyani ◽  
Indrarini Dyah Irawati ◽  
Danu Dwi S. ◽  
Mohammad Nuruzzamanirridha
Keyword(s):  
Control Function ◽  
Raspberry Pi ◽  
Small Scale ◽  
Software Defined Network ◽  
Standard Protocol ◽  
Open Flow ◽  
Control Functions ◽  
Forward Function ◽  
And Control ◽  
Sdn Controller

Open Flow is a standard protocol for differentiating forward function and control functions to facilitate the management of big network of SDN. The research have been carried out before using the emulator SDN Mininet. However Mininet has many shortcomings, such as the performance of which is less than the maximum due to simulation. Then some researchers also use the Net-FPGA as device. This device is less suitable for small scale because the prices are quite expensive and programming is quite complicated. In this study, SDN implementation carried out using OpenvSwitch as forwarding function mounted on TP-Link that has modificated using openwrt as firmware and Raspberry Pi with Ryu SDN Controller as control functions. The result shows that routing static can be implemented on SDN Network which use Raspberry Pi with Ryu Controller as control function with average bandwith 536.0909 Mbits/sec and average uptime network is 10.45 second.

Influence of Network Constraints on Modeling and Analysis of Cyber-Physical Systems

2018 ◽  
pp. 52-84 ◽  
Author(s):  
Stephanie Grubmüller ◽  
Georg Stettinger ◽  
Martin Benedikt ◽  
Daniel Watzenig
Keyword(s):  
Embedded System ◽  
Physical System ◽  
Networked Control Systems ◽  
Feedback System ◽  
Global Network ◽  
Specific Class ◽  
Modeling And Analysis ◽  
System A ◽  
Main Challenge ◽  
And Control

A cyber-physical system (CPS) is a composition of an embedded computer, a network and a physical process. Usually, the plant, which represents the physical part, is controlled by an embedded system, which consists of computation, communication and control elements, via the global network. This contribution focuses on networked control systems (NCSs) which represents a specific class of CPS. As the problems of CPSs and NCSs are quite similar the goal is to transfer well developed techniques of NCSs to CPSs for analysis purposes. NCSs deal with the analysis of the interaction between the physical system and the cyber system. A main challenge of a control engineer is the development of stable and robust controllers for a NCS. The same goal is present in the design of CPS. To ensure this goal the analysis of such a feedback system has to be performed which is not straight forward and limited by the used modeling approach. This work compares different state-of-the-art modeling approaches for NCSs and stability analysis methods therefore.

A Hierarchical Coordinated Control Method for Low Voltage Micro-Grid in Intelligent Community

2012 ◽  
Vol 263-266 ◽  
pp. 545-552
Author(s):  
Yi Rong Su ◽  
Shuang Hu Wang ◽  
Bing Wen Wang ◽  
Hai Long Bao
Keyword(s):  
Control Method ◽  
Low Voltage ◽  
Control Function ◽  
System Control ◽  
Level Control ◽  
Control Functions ◽  
Operation Control ◽  
Micro Grid ◽  
Intelligent Community ◽  
And Control

The operation control of the micro-grid system is the foundation to protect micro-grid equipment, to realize associate control and optimize economic operation. Looking on Chenjiazhen micro-grid in Shanghai as model, the paper set three hierarchical controls: protection control, micro-grid coordinated controller control which can achieve millisecond time precision and intelligent community energy management system control. Different level control function has been divided. Control functions in all levels complement each other and collaborate together to achieve the coordination and control of micro-grid running.

scholarly journals The switching control strategy of redundant electromechanical servo system based on the compound sliding mode control

2021 ◽  
Vol 268 ◽  
pp. 01069
Author(s):  
Zonglun Li ◽  
Zhiyuan Yu ◽  
Menglong Jiang
Keyword(s):  
Sliding Mode Control ◽  
Control Strategy ◽  
Sliding Mode ◽  
Servo System ◽  
Basic Structure ◽  
Mode Control ◽  
Control Functions ◽  
System A ◽  
Exponential Reaching Law ◽  
And Control

Aiming to resolve the limitations of robustness and stability in switching working modes of dual redundancy electric servo system, a control strategy based on sliding mode control is suggested. By analyzing the electromechanical servo system’s basic structure and working theory, a mathematical model is created to enable the design of new control functions. Taking into account the influence of the internal parameter perturbation of the electromechanical servo system during the switching between working modes, the sliding mode control is used to enhance system robustness, and the method of combining the latest saturation function and the exponential reaching law is used to minimize the system chattering. The simulation results and analysis show that the control strategy can effectively improve the robustness and control accuracy of the system.

scholarly journals Exploring the Shifting Geographical Pattern of the Global Command-and-Control Function of Cities

2021 ◽  
Vol 13 (22) ◽  
pp. 12798
Author(s):  
Piotr Raźniak ◽  
György Csomós ◽  
Sławomir Dorocki ◽  
Anna Winiarczyk-Raźniak
Keyword(s):  
New York ◽  
Global Economy ◽  
Control Function ◽  
Command And Control ◽  
Market Value ◽  
Geographical Pattern ◽  
Corporate Headquarters ◽  
Control Functions ◽  
And Control ◽  
The Impact

In recent years, some cities have experienced significant growth in terms of command and control functions of cities, and thus have managed to relocate themselves to a much upscale position in the global economy. The main goal of this study is to examine the command-and-control function of cities and the impact of the relocation of corporate headquarters on a city’s command-and-control function. The study examines the changes in the revenues of companies located in selected cities and countries and measure the command-and-control function (“C&C”) of cities that well illustrates the strength of cities and countries in the global economy. To achieve our goals, we employ a composite indicator, the Command and Control Index that integrates such fundamental financial data of companies as revenues, profits, market value, and assets. In the analysis, we consider the companies that are listed by Forbes Global 2000. Our findings reinforce that the command-and-control function of the traditional centers of corporate headquarters has been lessening for a while, whereas cities located in developing countries and China in the first place have been occupying an increasing position in the global command and control. Now, we are experiencing the robust growth of Beijing’s command-and-control function index, and the decline of that index of the former leaders (i.e., New York, London, and Tokyo). We can also draw the conclusion that the migration of headquarters does not significantly impact the change of cities’ command-and-control function. In addition, when relocating the headquarters, most companies have remained within the same country and some of them have not even left the metropolitan area itself. In recent years, the number of those companies that have relocated the corporate headquarters has increased, and they have experienced increase in their revenues as well. To attract more corporate headquarters, cities has to offer an attractive environment for companies which strategy should be supported by such governmental initiatives as the reduction of corporate taxes for relocated companies.

Assessment of the Efficiency of Tax Authorities In the Time of the Economy Digitalization

2018 ◽  
Vol 11 (2) ◽  
pp. 149-154
Author(s):  
E. E. Smirnova
Keyword(s):  
Control Function ◽  
Control Policy ◽  
Digital Economy ◽  
Service Function ◽  
Control Functions ◽  
The Subject ◽  
Definition Of ◽  
And Control ◽  
Control Implementation

The paper examines current aspects of the tax control policy ensuring timely and full budget gains during the transition to the digital economy. The subject of the research is managerial and tax relations under the economy digitalization conditions. The objectives of the research are the definition of targets for improving the efficiency of the service and control functions of tax authorities and determining the specifics of choosing indicators for the digitalization of the economy. The paper analyzes the efficiency of tax authorities by two criteria: the quality of providing the state services and the quality of the tax control implementation. It is concluded that the transformation of the activities of tax authorities in the digital economy with a shift from the exclusively control function tawards the emphasis on the service function requires a change in the tax employees motivation system and a higher degree of automation of their work.

An Agency Theory Perspective on Corruption in Sport: The Case of the International Olympic Committee

2006 ◽  
Vol 20 (1) ◽  
pp. 52-73 ◽  
Author(s):  
Daniel S. Mason ◽  
Lucie Thibault ◽  
Laura Misener
Keyword(s):  
Decision Making ◽  
Agency Theory ◽  
Control Function ◽  
International Olympic Committee ◽  
Sport Organizations ◽  
Control Functions ◽  
Management Function ◽  
Olympic Movement ◽  
Corrupt Behavior ◽  
And Control

This article discusses agency problems in sport organizations in which the same individuals are involved in both the management and control of decision making. We focus our analysis on the case of the International Olympic Committee (IOC) by reviewing the behavior of selected IOC members with regard to the bidding process for the Olympic Games and the resulting reform attempts made by the IOC in an effort to address issues of corruption. After a review of examples of corrupt behavior on the part of IOC members, agency theory is introduced to discuss IOC reforms and provide some suggestions for future reform. We propose incorporating other stakeholders (in addition to the IOC members), such as corporate partners, media conglomerates, and other members of the Olympic movement (e.g., athletes, coaches, officials), into management and control functions. More specifi cally, it is suggested that these stakeholders comprise a board that oversees the operations of the IOC (similar to the IOC’s current executive committee) and be given the ability to remove and/or sanction IOC members who act self-interestedly to the detriment of the Olympic movement. Thus, by delegating the control function of decision making to a board and the management function to internal agents, greater accountability for all organization members can be achieved.

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