Ship Control System Research Articles

Parallel Transportation Management and Control System for Subways

The subway’s daily management and control are too complicated to be handled by using traditional methods. Based on the artificial systems, computational experiments, and parallel execution (ACP) approach, the Parallel Transportation Management and Control System for Subways (PTMS -Subway) is proposed. First, the dynamic status perception and management platform for subways (SPMP-Subway) is constructed, and artificial subway systems (ASS) are designed and constructed, and then they are validated by the real-time data from SPMP-Subway. Then, the design content and construction process of computational experiments platform are performed. Finally, through the interactions of parallel execution system between actual subway and its ASS, a set of practical management and control algorithms can be validated and improved. PTMS-Subway can implement those advanced functions, such as real-time monitoring, warning, forecasting, scheduling optimization, incidence management, and so on, to improve its reliability, efficiency, safety, and service level. SPMP-Subway and PTMS-Subway have been piloted in Subway Lines 1 and 2 in Suzhou, China, and achieved the expected results and benefits successfully.

Tape transport control with suppression of time-varying tension disturbances

Disturbance suppression in the transport system of tape drives is essential for achieving high volumetric densities in tape storage, as improved tension control will enable operation with thinner tape media. In addition, tension variations lead to dimensional changes in the cross-track direction of the tape that must be accounted for in the track width budget. Hence, better tension control enables a higher track density. Furthermore, fluctuations of the tape velocity and tension around the nominal values impact the performance of the data channels, and consequently also the achievable areal recording density. In a tape transport system, disturbances are mainly induced by reel eccentricities that lead to time-varying tension disturbances. In this paper, the tension disturbances are first characterized using a strain-gauge sensor included in one of the rollers that determine the tape path. Then, a second characterization method that does not rely on a strain-gauge sensor is introduced. The new method is based on an estimate of the tension variation signal, which is derived from the difference of head lateral position measurements obtained by reading servo patterns on two adjacent servo bands. A tension feedback system is proposed, which uses time-varying controllers that adapt their frequency characteristics depending on the longitudinal tape position. The closed-loop system is designed to enhance disturbance suppression at the reel rotation frequencies. Experimental results are presented to illustrate the performance of the proposed tape transport control system.

Validade e fidedignidade de um instrumento em Português para avaliar o padrão de uso de bicicleta em áreas urbanas

DOI: http://dx.doi.org/10.5007/1980-0037.2017v19n1p17 The aim of this study was to analyze the validity and reliability of an instrument to assess bicycle use patterns in urban areas through systematic observation. The instrument items were selected from a literature review. Content validity was established by consensus opinion of experts of the physical activity area. The temporal stability (reliability) was verified by percentage of agreement and intraclass correlation coefficient (ICC). Observations were conducted using an adapted protocol based on the System for Observing Play and Recreation in Communities (SOPARC), consisting of systematic scans for counting cyclists in an urban area through video images provided by the public transport control system of Curitiba (URBS). Observers A and B recorded a total of 383 and 378 cyclists. Most of the observed subjects were men (87%), adults (84%), cycling on the BRT lane (54%), coming from downtown (54%), rode the bicycle on the wrong side of the street (58.2%), were not wearing a helmet (76.8) and bicycled alone (64%). Agreement percentiles ranged from 89.2 to 99.5% and ICC values from 0.922 to 0.999. According to criteria adopted, reliability was considered high in all categories included in the instrument. The instrument showed validity and reliability to be used in studies aiming to evaluate bicycle use patterns in Brazilian urban areas.

Software-defined networking in cyber-physical systems: A survey

Cyber-Physical Systems (CPSs) rely on networks that interconnect sensors and actuators to perform measurement, supervision and protection functions in different domains, such as transportation and industrial automation control systems. These networks must be able to support mobile wireless CPSs that are demanding new requirements related to flexibility and heterogeneity without compromising the Quality of Service (QoS). However, it is hard to determine, for example, the optimal resource allocation or the most reliable paths without global network information. In this way, the Software-Defined Networking paradigm is being considered as key to overcome such emerging needs. In particular, an SDN controller is able to establish paths between sensors and actuators according to bandwidth, latency, redundancy, and safety considerations. Thus, the goal of this paper is to review the state of the art of SDN approaches applied to mission-critical applications by identifying trends, challenges and opportunities for the potential development of software-defined cyber-physical networks.

天井クレーン液体容器搬送制御システムの設計

In the steel/casting industries, a liquid container transport is carried out by an overhead traveling crane or a trolley. The operation of the overhead traveling crane is carried out both operation by the experience operator and operation by automated transportation in order to prevent quality deterioration due to the overflow and involvement in a hostile environment. In particular, the overhead crane transportation by the operator, which is allowed to select freely pathway, is needed from the point of freedoms of the operation. This paper presents a design of a liquid container transport control system with an overhead traveling crane, which is allowed to operate by an inexperienced operator easily. The presented control system is designed as to suppress both the rod vibration and the sloshing (liquid vibration) without measuring the sloshing. The presented control system is two DOFs controller, the feed-forward controller is based on two notch filter, and the feedback controller is based on the H2/H∞ controller design method using LMI. The derived controller is performed a controller order reduction in consideration with practical use. Some experiments are presented to show the effectiveness of the proposed design of control system.

Control System of Training Ship Keeping the Desired Path Consisting of Straight-lines and Circular Arcs

Control System of Training Ship Keeping the Desired Path Consisting of Straight-lines and Circular Arcs

Design of Real Time Monitoring System for Dangerous Goods Transportation Based on DSP

To solve the hazardous goods transportation equipment state real-time monitoring and control system with TMS320F2812 of TI company as the core, through the shaping of the sensor into the alcohol gas signal, filtering, amplification, a / D conversion, A / D conversion using F2812 comes with 12 bit A / D converter, continuous sampling signal monitoring gas concentration change and through the acquisition of temperature and humidity signal, the gas concentration data were temperature and humidity compensation, accurate measurement, calibration gas data can be secondary sound and light alarm, and the MAX232 and PC data transfer, at any time to check and call history. Good monitoring and control to make the system more stable. System mainly includes sensor for gas detection, temperature detection pass, humidity sensor, signal conversion and processing unit, A / D conversion circuit, sound and light alarm unit, RS232 communication module, the battery monitoring unit, a gas pump control unit. DSP main program using modular programming, completed the DSP initialization of the main program module, real-time communication with the PC module and system function module test program design. Laboratory research on gas monitoring and control system scheme is designed in this paper for tankers physical model. and on this basis, focusing on the completion of the core part of the control system in the control card design and implementation. This system can realize the monitoring of the whole process of leakage of hazardous goods transport equipment, once dangerous goods transport vehicles of hazardous chemicals spill occurred, the system can real-time detection to the leakage and alarm, the modern crisis of goods logistics provides a security solution.

Concept for Developing Digital Infrastructure for Regional Passenger Transportation Control Systems

Abstract The article considers basic concepts for the digital infrastructure of regional passenger transportation control systems and results of their practical application (electronic register of routes, timetables of routes, route plans, information support of public transport stops). The mechanism of the digital infrastructure implementation is defined in accordance with provisions of Federal Law No. 220-FZ as of July 13, 2015 [ Government of the Russian Federation (2015) ], taking into account possibilities of development of modern automated dispatching systems of regional passenger transportation control.

Soft computing models in an intellectual open-pit mines transport control system

This article focuses on the development of control mechanisms of open pit mine robotized transport system. Method for the state of the technological roads identification with the use of fuzzy inference mechanisms is discussed.The structure of the control system is presented. The possibilities of the use of telemetry data for a wide range of important technological problems, which, anyway, are reduced to problems of interpretation of the data, object identification, forecasting of parameters and the interaction of robotic agents control are discussed. The examples of the formal setting of some of these problems which based on the soft computing are presented. Considered in detail the problem of identification of the open pit mine roadway. The procedure for organizing and conducting dump truck onboard experiments is described. The features of the main control parameters are analyzed. The mechanism of using the telemetry data processing in common with fuzzy inference tools is presented. The main stages of the experiment telemetry data processing are described.

An Infrared Sheet of Light Beacon Based Intelligent Traffic and Transport Control System

This paper describes the design, characterization and implementation details of a digital encoded infrared sheet of light based beacon system for intelligent control of the public transportation system. The system consists of an encoded infrared sheet of light beacon, which can convey the current location and traffic information to the vehicles. The system is capable of receiving traffic status input through a GSM (Global System Mobile) modem. The vehicles have an infrared receiver and a processor capable of decoding the information, and generating the audio and video messages to the driver.

Parallel Transportation Management and Control System and Its Applications in Building Smart Cities

Advancements in complexity, complex systems, and the intelligence sciences, particularly smart city technologies, have shown great potential in aiding to ease traffic congestion. The overall approach and the main ideas in building smart transportation for smart cities, particularly ACP (artificial system, computational experiment, and parallel execution)-based parallel transportation management and control systems (PTMS), are presented. PTMS can be expanded to the new generation of intelligent transportation systems. The main components of the proposed architecture include social signal and social traffic, ITS clouds and services, agent-based traffic control, and transportation knowledge automation. Some technical details of these components are discussed. Finally, one case study is introduced, and the effectiveness is analyzed.

The Sensitivity of State Differential Game Vessel Traffic Model

Abstract The paper presents the application of the theory of deterministic sensitivity control systems for sensitivity analysis implemented to game control systems of moving objects, such as ships, airplanes and cars. The sensitivity of parametric model of game ship control process in collision situations have been presented. First-order and k-th order sensitivity functions of parametric model of process control are described. The structure of the game ship control system in collision situations and the mathematical model of game control process in the form of state equations, are given. Characteristics of sensitivity functions of the game ship control process model on the basis of computer simulation in Matlab/Simulink software have been presented. In the end, have been given proposals regarding the use of sensitivity analysis to practical synthesis of computer-aided system navigator in potential collision situations.

Energy efficiency evaluation of off-road transport with hydrostatic transmission

The paper describes control system for multifunctional off-road transport with hydrostatic transmission movement at adverse terrain. Graphs of simulation results for developed machine are shown to select and justify the parameters, characteristics and adjustments of hydrostatic transmission.

ИННОВАЦИОННЫЕ СИСТЕМЫ УПРАВЛЕНИЯ НА Ж/Д ТРАНСПОРТЕ

ИННОВАЦИОННЫЕ СИСТЕМЫ УПРАВЛЕНИЯ НА Ж/Д ТРАНСПОРТЕ

Application of neuro-fuzzy algorithm to portable dynamic positioning control system for ships

This paper describes the nonlinear dynamic motion behavior of a ship equipped with a portable dynamic positioning (DP) control system, under external forces. The waves, current, wind, and drifting forces were considered in the calculations. A self-tuning controller based on a neuro-fuzzy algorithm was used to control the rotation speed of the outboard thrusters for the optimal adjustment of the ship position and heading and for path tracking. Time-domain simulations for ship motion with six degrees of freedom with the DP system were performed using the fourth-order Runge–Kutta method. The results showed that the path and heading deviations were within acceptable ranges for the control method used. The portable DP system is a practical alternative for ships lacking professional DP facilities.

Assessment of public transport control systems: a comparative analysis of platforms and a new platform architecture

Public transportation systems (PTSs) are complex and dynamic networks that are constantly exposed to disturbances. Many studies focused on the development of public transport control systems (PTCSs) to improve the efficiency of PTSs and ensure acceptable levels of quality of service (QoS). Although the performance of such systems has been analysed and assessed using simulation platforms, there is still a need for a common evaluation platform that allows both benchmarking and assessment of PTCSs based on a set of key performance indicators (KPI). This paper reviews existing simulation platforms and evaluates their ability to assess PTCSs based on a comparative analysis framework. Then, the paper introduces a new platform architecture for the evaluation and benchmarking of public transport control systems. We show that the suggested architecture fills in (at least part of) the gaps of existing platforms.

An Immune Memory and Negative Selection Based Decision Support System to Monitor and Control Public Bus Transportation Systems

In urban cities, disturbances, such as accidents or traffic congestion, may affect the good performance and level of service of public bus transportation systems. Developing Decision Support Systems (DSS) to help public transportation agencies in dealing with disturbances contributes to an efficient management of public transportation networks and allows users to benefit from high quality of services, in terms of punctuality and frequency. In this article, we design a Public Transportation Control System (PTCS) based on an analogy between public bus transportation systems and biological immune systems. We rely on biological immunity to design a set of models to structure knowledge related to both disturbances and control decisions. Monitoring and control mechanisms are also presented based on the immune negative selection and the immune memory to detect and react to disturbances.

Assessment of public transport control systems: a comparative analysis of platforms and a new platform architecture

Assessment of public transport control systems: a comparative analysis of platforms and a new platform architecture

A-11 エネルギ消費を考慮したマルチエージェントに基づく搬送制御システムの一構成法

A-11 エネルギ消費を考慮したマルチエージェントに基づく搬送制御システムの一構成法

Design and Comparison of Freight Scheduling Algorithms for Intelligent Control Systems

In this paper, we examine the freight scheduling problem and the design of decision support systems in rail transport. We present an intelligent control system that solves the engine and crew scheduling problem. The problem of freight scheduling is modelled as an assignment and optimization problem and solved using two different algorithms: the method of auctions and the simulated annealing method. The algorithms were adopted in order to optimize the solution while accounting for domain-specific features of rail transportation technology. A comparative evaluation of the two approaches allowed us to design a hybrid combined method which we apply in the development of an intelligent transport control system for scheduling rail traffic across the East Siberian Railway.