Improvements to safety on a drilling rig must cover all aspects of its operations. Safety awareness of the crew is clearly an important area, but careful set up of drilling equipment and monitoring of the operation is...
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Improvements to safety on a drilling rig must cover all aspects of its operations. Safety awareness of the crew is clearly an important area, but careful set up of drilling equipment and monitoring of the operation is another. A computer system for real time monitoring of rig status, problem detection and controlling rig operations is described. This is the first step towards control, and then automation which will bring further safety and environmental benefits. It is important for the driller to have the capability to follow activities on the rig to ensure that they are appropriate to current rig operations and consistent with safe conditions. A computer system can also help by being continuously vigilant, watching for the earliest signs of potentially catastrophic events, detecting them before they become critical and alerting the driller. This includes monitoring pressure and flow data to check for washouts that can result in a twist off, and checking flow rates and tank volumes for early kick detection. The system can also be used for post analysis of problems to help develop new procedures to avoid re-occurrence. In this paper we briefly review the event detection capability of the system with intelligent alarms for washout and kick detection. Early kick detection reduces the problem of circulating out the kick, but it is still a hazardous procedure requiring close monitoring. A new display has been introduced to monitor kill procedures and has led to better control. The operation and experience with this system in terms of safety benefits are discussed and illustrated with field examples. Finally we discuss the way forward and how such systems are currently being developed to include process control and automation for the rig of the future.
Successful operation of life support systems for human exploration of space will depend largely on in situ sensors and integration of these sensors to an autonomous control architecture. The complexity of a life suppo...
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The prototype application of a distributed problem-solving framework (DPSF) is described. The DPSF is made up of the coarse-grained multiagent systems defined as a set of computational agents that autonomously execute...
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The prototype application of a distributed problem-solving framework (DPSF) is described. The DPSF is made up of the coarse-grained multiagent systems defined as a set of computational agents that autonomously execute. cooperate, and coordinate each other to solve the network management problems. This loosely coupled heterogeneous system is connected by a common bus. In the proposed architectural components of the DPSF, the blackboard modulus consists of a data blackboard and a control blackboard, and knowledge sources (KSs) are composed of a local-planning KS, a metaplanning KS, a communication KS, a domain KS and a constraint KS. It is found that the DPSF offers advantages of performance, reliability, extensibility and the ability to handle incomplete data and knowledge.< >
The proceedings contain 55 papers. The special focus in this conference is on Computing and Information. The topics include: On the complexity of (Off-line) 1-tape ATM’s running in constant reversals;a constant updat...
ISBN:
(纸本)9783540535041
The proceedings contain 55 papers. The special focus in this conference is on Computing and Information. The topics include: On the complexity of (Off-line) 1-tape ATM’s running in constant reversals;a constant update time finger search tree;average case analysis of algorithms using matrix recurrences;finding two-tree-factor elements of tableau-defined monoids in time O(n);toward a general theory of computation and specification over abstract data types;using the hamiltonian path operator to capture NP;some remarks on polynomial time Isomorphisms;an axiomatization of wait-freedom and low-atomicity;the gamma model as a functional programming tool;computing the transitive closure of symmetric matrices;the asymptotic evolution of data structures;an environment for information system prototyping: A system simulation approach;a logic-free method for modular composition of specifications;on real-time program specification description with a data model-based language;dinas: computer-assisted system for multi-criteria transportation and location analyses;logic programming for software testing;block concatenated code word surrogate file for partial match retrieval;applications development toolkits for environmental modelling and monitoring;a hypertext for literate programming;ethics and computers: Can universities set the standards?;alternatives to the B - Tree;on the formal aspects of approximation algorithms;minimal perfect hashing for large sets of data;architectural classification and transaction execution models of multidatabase systems;semantic query optimization in distributed databases;an architecture for a multimedia database management system supporting content search;adaptive expert systems and analogical problem solving;the behavior of database concurrency control mechanisms under Bursty arrivals;the core concurrency.
Schema-based navigational techniques are used to introduce dynamic path replanning for a mobile robot, based on internal sensor information. This mode of operation, termed homeostatic control, forms an integral part o...
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Schema-based navigational techniques are used to introduce dynamic path replanning for a mobile robot, based on internal sensor information. This mode of operation, termed homeostatic control, forms an integral part of the autonomous robot architecture. A model that is analogous to the mammalian endocrine system serves as the basis for this mode. Simulation results verify the viability of this concept. It is found that dynamic replanning can be carried out using internal monitoring of the robot's state, and not solely based on environmental perception. The robot can be shown to be responsive to changes in fuel, temperature, and other conditions as it navigates through the world.< >
It is noted that the most flexible and feature-rich implementations of intelligent networks are based on centralized databases. The resulting architectural and hardware separation between the database and switching fu...
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It is noted that the most flexible and feature-rich implementations of intelligent networks are based on centralized databases. The resulting architectural and hardware separation between the database and switching functions assures continued high network call processing capacity while simultaneously optimizing the use of dedicated computing resources for the database function. It is demonstrated that similar advantages are obtained from the architectural separation of the function of end-user access to the databases to monitor and change the way the network handles the user's needs. Dedicated computing resources for the user-access function allow a highly responsive and user-friendly interface and protect other critical parts of the network from unintended slowdowns. An example of such a system, AT&T's NETSTAR, which is used to support intelligent networks provided by AT&T to its overseas customers, is discussed. The NETSTAR realization of this function is explained, with an indication of how it meets both current and future needs of the users of intelligent networks.< >
The work described here derives from the implementation of intelligentcontrol for a Bioregenerative Closed Ecological Life Support System. The AI-Based, distributed Environment control System (AIDECS) will be capable...
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The issue of site autonomy in the model of a decentralized distributed database system is discussed. The two major characteristics of site autonomy are identified and examined, and examples are provided to demonstrate...
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The issue of site autonomy in the model of a decentralized distributed database system is discussed. The two major characteristics of site autonomy are identified and examined, and examples are provided to demonstrate their significance. A system architecture is proposed that provides a flexible and powerful way of achieving the required degree of site autonomy.< >
intelligent, computer-based assistants can serve as statisticians, historians, diagnosticians, watchdogs, consultants, tutors and planners. They could be of great help to power system operators. This paper describes a...
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ISBN:
(纸本)0852963319
intelligent, computer-based assistants can serve as statisticians, historians, diagnosticians, watchdogs, consultants, tutors and planners. They could be of great help to power system operators. This paper describes a typical intelligent assistant and discusses the difficulties with integrating it into a traditional energy management system.
A general-purpose control and monitoring system for power plants was implemented in a power plant installation in Stockholm during 1983. The authors discuss the following properties and features of the installation: s...
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A general-purpose control and monitoring system for power plants was implemented in a power plant installation in Stockholm during 1983. The authors discuss the following properties and features of the installation: system configuration: main computer with distributed microcomputers, communication link and separate hardwired alarm functions;step connection facility;automatic battery charging;autonomous operation when the computer is down;intelligent alarm functions with diagnostics;and remote operation and control.
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