scholarly journals Station Keeping and Segmented Trajectory Control of a Wind-Propelled Autonomous Catamaran

2006 ◽  
Author(s):  
Gabriel Elkaim ◽  
Robert Kelbley
Keyword(s):  
Trajectory Control ◽  
Station Keeping

DC arcjet system for north-south station keeping of geosynchronous satellite

1987 ◽  
Author(s):  
HIROSHI SUZUKI ◽  
KOICHI MIYOSHI ◽  
TAKAO YOSHIKAWA ◽  
RYUICHI NAGASHIMA
Keyword(s):  
Station Keeping ◽  
Geosynchronous Satellite

Station-keeping control design for Earth-Moon L1 librartion point

2019 ◽  
Author(s):  
Thiago Cesar Lousada Marsola ◽  
Sandro da Silva Fernandes ◽  
José Manoel Balthazar
Keyword(s):  
Control Design ◽  
Station Keeping

scholarly journals Station-keeping analysis of an FPSO to prevent collision with SPM using AHTS

2020 ◽  
Vol 557 ◽  
pp. 012055
Author(s):  
A Baidowi ◽  
B Cahyono ◽  
F Ardhiansyah ◽  
T F Nugroho
Keyword(s):  
Station Keeping

scholarly journals Wellbore trajectory control tool seal system leakage analysis based on steady gap flow

2020 ◽  
Vol 12 (6) ◽  
pp. 168781402093046 ◽  
Author(s):  
Lei Shi ◽  
Keqiang Wang ◽  
Ding Feng ◽  
Hong Zhang ◽  
Peng Wang
Keyword(s):  
Prediction Method ◽  
Electronic System ◽  
Contact Length ◽  
Trajectory Control ◽  
Analysis Model ◽  
Rotating Shaft ◽  
Element Analysis ◽  
Gap Flow ◽  
Total Leakage ◽  
Gap Height

Lubricant leakage will inevitably occur during the working process of wellbore trajectory control tools. Even including the lubricant compensation system, serious leakage will still cause lacks lubrication of the internal mechanical structure as well as electronic system damaged by external infiltration fluid, especially when it comes to battery sub and other electronic equipment. Seal system leakage prediction method was presented based on the assumption of steady gap flow. It is assumed that there is a constant gap between the lip seal and the rotating shaft, the gap height is determined by oil film thickness, and the length of the gap was determined by the contact analysis using the Mooney–Rivlin constitutive model. The analysis results show that the contact length between the primary seal lip and the rotary shaft is about 0.1 mm under the condition of ensuring the contact between the deputy seal lip and the rotary shaft. The overall lubricant leakage finite element analysis model was established, and the relationship between the internal lubricant pressure of the tool and the total leakage was obtained. The results of analysis indicate that under the internal pressure of 0.03 MPa, the lubricant leakage is approximately 6 mL/h, which was verified by experiments.

Observer‐based trajectory control for directional drilling process

2021 ◽  
Author(s):  
Zhen Cai ◽  
Xuzhi Lai ◽  
Min Wu ◽  
Luefeng Chen ◽  
Chengda Lu
Keyword(s):  
Trajectory Control ◽  
Drilling Process ◽  
Directional Drilling
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