Remote Operation of Unattended Pipeline Compressor Stations

2002 ◽  
Author(s):  
Ildemar Pinto Nunes ◽  
Luiz Diogo de Vasconcellos ◽  
Caetano Frisoli
Keyword(s):  
Rio De Janeiro ◽  
Working Hours ◽  
Control Points ◽  
Control Functions ◽  
Scada System ◽  
Routine Tasks ◽  
Complete Set ◽  
Status Signals ◽  
And Control ◽  
Design Construction

This paper describes pipeline compressor stations which are remotely monitored, operated and controlled from a central control station in Rio de Janeiro, Brazil. This is a result of TBG’s experience in design, construction and operation of compressor stations that are built for unattended operation. Only a small maintenance crew is necessary for routine tasks during normal working hours. In this connection, a complete set of resources has been implemented in order to ensure the required reliability level. This includes monitoring instruments (not only for the turbo compressors but also for all plant auxiliaries), redundant systems and protections, together with automatic control system for each of the relevant station components. Equipment status signals as well as alarm & trip signals are exchanged via a SCADA system with the Control and Supervision Center, CSC, in Rio de Janeiro. In addition, the CSC is capable of performing all relevant control actions such as start / stop compressor units and station auxiliaries, also remotely setting the station pressure and flow control points. The paper describes also the architecture and configuration of the supervisory and control functions which are performed by means of a SCADA system, along with the pipeline telecommunications system.

Matilda Floor Elevator PLC Control Circuit Design

2017 ◽  
Vol 9 (1) ◽  
pp. 23-56
Author(s):  
Ye Liu ◽  
Tao Gao ◽  
Chong Yuan ◽  
Tianze Li
Keyword(s):  
Circuit Design ◽  
Frequency Converter ◽  
Integration Time ◽  
Control Functions ◽  
Plc Control ◽  
Operation Process ◽  
Status Signals ◽  
Plc Program ◽  
And Control ◽  
Command Signal

This design introduced the operation process of the lift. In accordance with the requirements of energy conservation design teaching building Mingde building automatic control of the lift. By setting the TDD slope integration time Siemens MM440 transducer to control the elevator has the speed, and by j1.1 jv tractors to carry and transfer power make the elevator running. The Siemens S7-200 series PLC as control host CPU226, and extends the S7-200 series of I/O extension module (EM223) to control the input and output, complete the elevator traction motor and frequency converter, direction, floor, according to the layer station call, capsules in operation, the safety protection command signal for management and control functions. From inside the elevator running status signals, hall, driving direction, traffic location floor integrated PLC program control internal rule.

administrasi ketatausahaan sekolah

2020 ◽  
Author(s):  
Isra Revenia
Keyword(s):  
Information Needs ◽  
Control Functions ◽  
Definition Of ◽  
The Right ◽  
And Control

This article is made to know the destinantion and the administrasi functions of the school in order to assist the leader of an organazation in making decisions and doing the right thing, recording of such statements in addition to the information needs also pertains to the function of accountabilitty and control functions. Administrative administration is the activity of recording for everything that happens in the organization to be used as information for leaders. While the definition of administration is all processing activities that start from collecting (receiving), recording, processing, duplicating, minimizing and storing all the information of correspondence needed by the organization. Administration is as an activity to determine everything that happens in the organization, to be used as material for information by the leadership, which includes all activities ranging from manufacturing, managing, structuring to all the preparation of information needed by the organization.

scholarly journals Design, Construction, and Control for an Underwater Vehicle Type Sepiida

Robotica ◽  
2020 ◽  
pp. 1-18
Author(s):  
M. Garcia ◽  
P. Castillo ◽  
E. Campos ◽  
R. Lozano
Keyword(s):  
Embedded System ◽  
Closed Loop ◽  
Underwater Vehicle ◽  
Mathematical Representation ◽  
Closed Loop System ◽  
Vehicle Type ◽  
Mathematical Equations ◽  
And Control ◽  
Design Construction

SUMMARY A novel underwater vehicle configuration with an operating principle as the Sepiida animal is presented and developed in this paper. The mathematical equations describing the movements of the vehicle are obtained using the Newton–Euler approach. An analysis of the dynamic model is done for control purposes. A prototype and its embedded system are developed for validating analytically and experimentally the proposed mathematical representation. A real-time characterization of one mass is done to relate the pitch angle with the radio of displacement of the mass. In addition, first validation of the closed-loop system is done using a linear controller.

scholarly journals Boundaryless working hours and recovery in Germany

2021 ◽  
Author(s):  
Laura Vieten ◽  
Anne Marit Wöhrmann ◽  
Alexandra Michel
Keyword(s):  
Working Hours ◽  
Working Time ◽  
Overtime Work ◽  
Psychological Detachment ◽  
Representative Study ◽  
Flexible Working ◽  
Recovery Experiences ◽  
High Level ◽  
And Control ◽  
Extended Work

Abstract Objective Due to recent trends such as globalization and digitalization, more and more employees tend to have flexible working time arrangements, including boundaryless working hours. The aim of this study was to investigate the relationships of various aspects of boundaryless working hours (overtime, Sunday work, and extended work availability) with employees’ state of recovery. Besides, we examined the mediating and moderating role of recovery experiences (psychological detachment, relaxation, mastery, and control) in these relationships. Methods We used data from 8586 employees (48% women; average age of 48 years) who took part in the 2017 BAuA-Working Time Survey, a representative study of the German working population. Regression analyses were conducted to test main effects as well as mediation and moderation. Results Overtime work, Sunday work, and extended work availability were negatively related to state of recovery. Psychological detachment mediated these relationships. Furthermore, we found that relaxation and control mediated the association between extended work availability and state of recovery. However, no relevant moderating effects were found. Conclusions Altogether, our findings indicate that various aspects of boundaryless working hours pose a risk to employees’ state of recovery and that especially psychological detachment is a potential mechanism in these relationships. In addition, the results suggest that a high level of recovery experiences cannot attenuate these negative relationships in leisure time. Therefore, employers and employees alike should try to avoid or minimize boundaryless working hours.

scholarly journals Lifecycle Design of Disruptive SCADA Systems for Waste-Water Treatment Installations

2021 ◽  
Vol 13 (9) ◽  
pp. 4950
Author(s):  
Stelian Brad ◽  
Mircea Murar ◽  
Grigore Vlad ◽  
Emilia Brad ◽  
Mariuța Popanton
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Waste Water Treatment ◽  
Value Added ◽  
Competitive Advantages ◽  
Major Focus ◽  
Scada System ◽  
Scada Systems ◽  
And Control ◽  
Lifecycle Design

Capacity to remotely monitor and control systems for waste-water treatment and to provide real time and trustworthy data of system’s behavior to various stakeholders is of high relevance. SCADA systems are used to undertake this job. SCADA solutions are usually conceptualized and designed with a major focus on technological integrability and functionality. Very little contributions are brought to optimize these systems with respect to a mix of target functions, especially considering a lifecycle perspective. In this paper, we propose a structured methodology for optimizing SCADA systems from a lifecycle perspective for the specific case of waste-water treatment units. The methodology embeds techniques for handling entropy in the design process and to assist engineers in designing effective solutions in a space with multiple constrains and conflicts. Evolutionary multiple optimization algorithms are used to handle this challenge. After the foundation of the theoretical model calibrated for the specific case of waste-water treatment units, a practical example illustrates its applicability. It is shown how the model can lead to a disruptive solution, which integrates cloud computing, IoT, and data analytics in the SCADA system, with some competitive advantages in terms of flexibility, cost effectiveness, and increased value added for both integrators and beneficiaries.

Design, Construction and Control of a Remotely Operated Vehicle (ROV)

2011 ◽  
Author(s):  
Alireza Marzbanrad ◽  
Jalil Sharafi ◽  
Mohammad Eghtesad ◽  
Reza Kamali
Keyword(s):  
High Speed ◽  
Degrees Of Freedom ◽  
Remotely Operated Vehicle ◽  
Six Degrees Of Freedom ◽  
Depth Sensors ◽  
Control Schemes ◽  
On Line ◽  
Operation Unit ◽  
And Control ◽  
Design Construction

This is report of design, construction and control of “Ariana-I”, an Underwater Remotely Operated Vehicle (ROV), built in Shiraz University Robotic Lab. This ROV is equipped with roll, pitch, heading, and depth sensors which provide sufficient feedback signals to give the system six degrees-of-freedom actuation. Although its center of gravity and center of buoyancy are positioned in such a way that Ariana-I ROV is self-stabilized, but the combinations of sensors and speed controlled drivers provide more stability of the system without the operator involvement. Video vision is provided for the system with Ethernet link to the operation unit. Control commands and sensor feedbacks are transferred on RS485 bus; video signal, water leakage alarm, and battery charging wires are provided on the same multi-core cable. While simple PI controllers would improve the pitch and roll stability of the system, various control schemes can be applied for heading to track different paths. The net weight of ROV out of water is about 130kg with frame dimensions of 130×100×65cm. Ariana-I ROV is designed such that it is possible to be equipped with different tools such as mechanical arms, thanks to microprocessor based control system provided with two directional high speed communication cables for on line vision and operation unit.

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