期刊
JOURNAL OF PROCESS CONTROL
卷 70, 期 -, 页码 24-35出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jprocont.2018.07.019
关键词
Drill-string vibrations; Stick-slip; Distributed systems; Differential flatness; Delay equations
资金
- ConocoPhillips
- AkerBP
- Statoil
- Wintershall
- RCN grant Drill-Well [203525/030]
- European Union [608695]
- FRIPRO Mobility Grant Fellowship Programme (FRICON)
A distributed model of a drill string with a collars section is presented with Coulomb friction as a distributed source term. This model is capable of replicating stick slip oscillations as caused by the reduction in friction from static to dynamic. We design a feed-forward startup trajectory for initiating rotation of the drill string that effectively avoids the stick slip limit cycle. The trajectory design is performed using the differential flatness of the bit angular velocity, and by treating the reduction from static to dynamic friction as an estimated disturbance to be canceled, thus conforming to the canonical 3-DOF controller design for tracking and disturbance rejection. A simulation study illustrates the feasibility of the approach. (C) 2018 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据