scholarly journals Iwis and Siis in Subsea Control Systems: Experience from Implementation

2009 ◽  
Vol 42 (4) ◽  
pp. 113-117
Author(s):  
Sverre Corneliussen
Keyword(s):  
Control Systems ◽  
Field Experience ◽  
Lessons Learned ◽  
Optical Monitoring ◽  
Actual System ◽  
Fiber Optical ◽  
System Configurations ◽  
Interface Standardization

The Intelligent Well Interface Standard (IWIS) panel published Recommended Practice IWIS RP-AI in October 2007 after 10 years of work and meetings, and IWIS is now closed. This paper will address FMC experience of implementing IWIS in Subsea Control Systems. The practical use of the Recommended Practice, the specific requirements, the constraints and the gaps are illustrated with examples of actual system configurations and field experience. Subsea Instrument Interface Standardization (SIIS) activities have been running in parallel with IWIS and complementing IWIS. Some of the IWIS gaps will be closed as part of SIIS and are presented with description of proposed recommendations. Practical use of SIIS and current gaps are illustrated with examples of actual system configurations and field experience. Subsea Fiber Optical Monitoring (SEAFOM) is also running in parallel with SIIS and FMC has actively participated in IWIS, SIIS and SEAFOM since the beginning. Some of the benefits of participation together with some lessons learned are presented.

Second Paper: Failure-Survival Automatic Flight Control Systems for Aircraft with Particular Reference to a High Reliability Electrohydraulic Actuator

1965 ◽  
Vol 180 (1) ◽  
pp. 246-259
Author(s):  
R. Ruggles
Keyword(s):  
Control System ◽  
Control Systems ◽  
Flight Control ◽  
High Reliability ◽  
Supply System ◽  
Design Criteria ◽  
Flight Control System ◽  
Advantages And Disadvantages ◽  
System Configurations ◽  
Very High

The author discusses some of the problems of failure-survival automatic flight control systems and suggests some basic ground rules as design criteria. The advantages and disadvantages of some of the main types of system are discussed: duplex, triplex, triple component, duplicate-monitored and quadruplex systems being covered. In particular, a quadruplex actuator is described which has been designed and developed mainly for automatic flight control system applications where a very high degrees of failure-survival capability is required. A detailed failure analysis of the various systems is carried out and the importance of the electrical and hydraulic supply system configurations and failure rates is brought out.

scholarly journals Self Control and Server-Supervisory Control for Multiple Mobile Robots and its Applicability to Intelligent DNC System

Robotics ◽  
2013 ◽  
pp. 375-390
Author(s):  
F. Nagata ◽  
T. Yamashiro ◽  
N. Kitahara ◽  
A. Otsuka ◽  
K. Watanabe ◽  
...  
Keyword(s):  
Mobile Robots ◽  
Control Systems ◽  
Supervisory Control ◽  
Low Cost ◽  
Self Control ◽  
Control Mode ◽  
Actual System ◽  
Multiple Mobile Robots ◽  
Collective Behaviors ◽  
Nc Machine

Multiple mobile robots with six PSD (Position Sensitive Detector) sensors are designed for experimentally evaluating the performance of two control systems. They are self-control mode and server-supervisory control mode. The control systems are considered to realize swarm behaviors such as Ligia exotica. This is done by using only information of PSD sensors. Experimental results show basic but important behaviors for multiple mobile robots. They are following, avoidance, and schooling behaviors. The collective behaviors such as following, avoidance, and schooling emerge from the local interactions among the robots and/or between the robots and the environment. The objective of the study is to design an actual system for multiple mobile robots, to systematically simulate the behaviors of various creatures who form groups such as a school of fish or a swarm of insect. Further, the applicability of the server-supervisory control scheme to an intelligent DNC (Direct Numerical Control) system is briefly considered for future development. DNC system is an important peripheral apparatus, which can directly control NC machine tools. However, conventional DNC systems can neither deal with various information transmitted from different kinds of sensors through wireless communication nor output suitable G-codes by analyzing the sensors information in real time. The intelligent DNC system proposed at the end of the chapter aims to realize such a novel and flexible function with low cost.

Experience with Chemical Injection and Umbilicals in Pre-Salt Fields

2021 ◽  
Author(s):  
Sidnei Guerreiro Da Silva ◽  
Andre Athayde Gonçalves ◽  
William Albuquerque Da Silva ◽  
Rafael Di Lorenzo Filho
Keyword(s):  
Control Systems ◽  
Deep Water ◽  
Production Systems ◽  
Poor Performance ◽  
Lessons Learned ◽  
Operational Experience ◽  
The Poor ◽  
Design Requirements ◽  
Chemical Products ◽  
Wax Deposits

Abstract The characteristics of Pre-Salt carbonate reservoirs demand downhole chemical injection to prevent scale, asphaltene, and wax deposits, besides the need of H2S scavenger, and MEG, normally injected at Xmas tree (WCT). The poor performance of injection systems installed in Santos Basin, together with production risks associated to the lack of chemical injection, led the project team to re-evaluate design requirements, such as chemical products characteristics, production systems equipments, umbilicals, and chemical injection valves. In addition, umbilical failures are being observed in other deep-water fields, related to subsea control systems functions. This paper focuses on Company operational experience and lessons learned related to umbilicals and downhole chemical injection.

A Model Repository for Automotive Embedded Control Systems Design

2003 ◽  
Author(s):  
Kenneth R. Butts ◽  
Ravi Rangan ◽  
Mark Jennings ◽  
Gail Cheng
Keyword(s):  
Product Development ◽  
Control Systems ◽  
Data Model ◽  
Configuration Management ◽  
Systems Design ◽  
Lessons Learned ◽  
Embedded Control ◽  
Embedded Control Systems ◽  
Model Repository ◽  
Control Systems Design

Model-based product development methodologies are becoming more widely used by developers of automotive embedded control systems. This paper presents a model repository intended to provide configuration management, reuse, and sharing infrastructure in support of this trend. An initial set of repository requirements is presented and then augmented with lessons-learned from a pilot realization of the system. This pilot realization is discussed with respect to implementation and application. A repository data model is also described.

Cross Cultural Field Exchange as a Rehabilitation Professional Development Experience

2007 ◽  
Vol 38 (3) ◽  
pp. 18-24
Author(s):  
Richard G. Luecking ◽  
Lisa Cuozzo ◽  
Claudia McInerney ◽  
Sylvia Helena Moraes Cury ◽  
Mariana Cristina B. C. Lorca
Keyword(s):  
Field Experience ◽  
The United States ◽  
Cross Cultural ◽  
Lessons Learned ◽  
Exchange Program ◽  
Cultural Field ◽  
Community Rehabilitation ◽  
Development Experience ◽  
Rehabilitation Professional ◽  
General Rehabilitation

This article describes the structure and content of a field experience provided in the United States to Brazilian rehabilitation students participating in a CAPES-FIPSE student exchange program. The article presents features of the field experience curriculum, lessons learned in this cross-cultural field exchange, and a discussion of the value of such exchanges from the perspective of both an American and Brazilian community rehabilitation provider. Implications for general rehabilitation practices are also discussed.

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