An expanding spread experiment during COCORP'S field operation in Utah

1986 ◽  
pp. 237-246 ◽  
Author(s):  
Char-Shine Liu ◽  
Tianfei Zhu ◽  
Harlow Farmer ◽  
Larry Brown
Keyword(s):  
Field Operation

Upper Ball Joint Force Variations due to Riser Tensioner and Vessel Motions—Part II: Analysis and Computer Simulation

1990 ◽  
Vol 112 (3) ◽  
pp. 200-207 ◽  
Author(s):  
T. J. Kozik ◽  
J. E. Lowell ◽  
A. Ertas
Keyword(s):  
Computer Simulation ◽  
General Equation ◽  
Ship Motion ◽  
Joint Motion ◽  
Ball Joint ◽  
Joint Force ◽  
Field Operation ◽  
Breakaway Torque ◽  
Cable Forces

An analysis of the variation of forces acting on the upper ball joint of a riser string due to the drill ship motion and riser tensioner dynamic has been conducted. The analysis includes the effect of breakaway torque on the tensioner sheaves while assuming vessel and upper ball joint motion to be independent. General equation for the tensioner cable forces and for the forces exerted on the riser upper ball joint by the ship joint-tensioner system derived in Part I are solved. The variation in the tensioner cable forces is compared to data generated in field operation.

scholarly journals The Athens Mobile γ-Spectrometry System (AMESOS)

2019 ◽  
Vol 23 ◽  
pp. 150
Author(s):  
A. Karailias ◽  
V. Lagaki ◽  
C. Katsiva ◽  
A. Kanellakopoulos ◽  
T. J. Mertzimekis ◽  
...  
Keyword(s):  
Absorbed Dose ◽  
In Situ Measurements ◽  
Harsh Environments ◽  
The Public ◽  
Dose Rates ◽  
Field Operation ◽  
Standard Calibration ◽  
Γ Spectrometry ◽  
The University

We report on a new mobile γ-spectrometry system (AMESOS) developed at the University of Athens. The system aims at carrying out in situ measurements to study distributions of NORM and TENORM at harsh environments or where sampling is difficult. AMESOS has been characterized by using standard calibration sources and minerals of known, independently determined, U and Th concentrations. Simulations of the system have been performed with MCNP and Geant4. As a proof of good field operation, AMESOS was deployed in a series of measurements at Mt. Kithaeron, near Athens, extending earlier data and estimating absorbed dose rates that concern the public.

Multi-Functional Device Applications of Nonlinear Optical Polymer Materials.

1989 ◽  
Vol 175 ◽  
Author(s):  
R. Lytel ◽  
G.F. Lipscomb
Keyword(s):  
Nonlinear Optical ◽  
Polymer Materials ◽  
Functional Roles ◽  
Optical Polymer ◽  
Field Operation ◽  
Electro Optic ◽  
Recent Developments ◽  
Device Applications ◽  
Nonlinear Optical Polymer ◽  
Practical Field

AbstractRecent developments in the application of electro-optic polymer materials to perform multi-functional roles in integrated optic device applications are summarized and future requirements for practical field operation are discussed.

scholarly journals Field operation of a 125kW ORC with ship engine jacket water

2017 ◽  
Vol 129 ◽  
pp. 495-502 ◽  
Author(s):  
Christopher Sellers
Keyword(s):  
Field Operation

“Low-Field” Operation of Magnetrons

1961 ◽  
pp. 315-330 ◽  
Author(s):  
R.G. ROBERTSHAW ◽  
W.E. WILLSHAW
Keyword(s):  
Low Field ◽  
Field Operation

Research on mechanism configuration and coordinated control for power distribution network live working robot

2020 ◽  
Vol 47 (3) ◽  
pp. 453-462 ◽  
Author(s):  
Yu Yan ◽  
Wei Jiang ◽  
Dehua Zou ◽  
Wusheng Quan ◽  
Hong Jun Li ◽  
...  
Keyword(s):  
Power Distribution ◽  
Control Method ◽  
Distribution Network ◽  
Coordinated Control ◽  
Internal Force ◽  
Normal Operation ◽  
Power Distribution Network ◽  
Content Type ◽  
Field Operation ◽  
Closed Chain

Purpose In the long-term network operation, the power distribution network will be subjected to the effects of ultra-high voltage, strong electromagnetic interference and harsh natural environment on the power system, which will lead to the occurrence of different faults in the distribution network and directly affect the normal operation of the power grid. Design/methodology/approach The purpose of this study is to solve the problems of labor intensity, high risk and low efficiency of distribution network manual maintenance operation, this paper proposed a new configuration of the live working robot for distribution network maintenance, the robot is equipped with dual working arms through the mobile platform, which can realize the coordination movement, the autonomous reorganization and replacement of the end tools, respectively, so as the robot power distribution maintenance function such as stripping, trimming, wiring and the operation control problem of the distribution network-robot with small arms and in small operation space can be realized. Findings To effective elimination or reduce the adverse effects of the internal forces in the closed chain between the working object and manipulator under the typical task of the 10 kV distribution network, this paper has established the robot coordinated control dynamics model in the closed-chain between the dual-working object and proposed the dynamic distribution method of closed-chain internal force and the effectiveness has been proved by simulation experiments and 10 kV field operation. Originality/value The force-position hybrid control can realize the mutual compensation of force and position so as to effectively reduce the internal force in the closed chain. Finally, the engineering practicality of the method is verified by field operation experiment, the effective implementation of this control method greatly improves the robot working efficiency and the operation reliability, the promotion and application of the control method have great theoretical and practical value and maintenance management system, so as to achieve automation of electric.

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