| 引用本文: | 徐宝昌,吴楠,孟卓然.控压钻井系统井下不确定参数与未知状态估计[J].控制理论与应用,2022,39(8):1561~1568.[点击复制] |
| XU Bao-chang,WU Nan,MENG Zhuo-rang.Estimation of downhole uncertain parameters and unknown state of managed pressure drilling[J].Control Theory and Technology,2022,39(8):1561~1568.[点击复制] |
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| 控压钻井系统井下不确定参数与未知状态估计 |
| Estimation of downhole uncertain parameters and unknown state of managed pressure drilling |
| 摘要点击 1162 全文点击 382 投稿时间：2021-06-30 修订日期：2021-11-23 |
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| DOI编号 10.7641/CTA.2021.10566 |
| 2022,39(8):1561-1568 |
| 中文关键词 控压钻井系统 不确定参数 自适应观测器 观测器匹配条件 线性矩阵不等式 |
| 英文关键词 managed pressure drilling system uncertain parameters adaptive observer observer matching condition linear matrix inequality |
| 基金项目 国家重点研发计划项目(2019YFA0708304), 中国石油天然气集团有限公司–中国石油大学(北京)战略合作科技专项项目(ZLZX2020-03)资助. |
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| 中文摘要 |
| 针对控压钻井过程中井下信息获取难度大的问题, 本文设计了一种可以同时估计井下不确定参数与未知
状态的自适应观测器. 首先, 针对未知状态中含有不确定参数的控压钻井系统, 提出了一种可解耦不确定参数的观
测器匹配条件. 其次, 根据此观测器匹配条件设计自适应观测器估计井下参数与状态, 并通过李雅普诺夫稳定性理
论证明了估计误差的渐近稳定性. 最后, 基于线性矩阵不等式方法求解观测器增益, 提高观测器的鲁棒性. 仿真分析
表明: 与已有针对控压钻井系统设计的自适应观测器相比, 本文所设计的观测器对井下环空摩擦积分和井底流量
的估计具有更好的收敛性以及鲁棒性. |
| 英文摘要 |
| Aiming at the difficulty of obtaining downhole information in the process of managed pressure drilling, this
paper designs an adaptive observer that can simultaneously estimate the downhole uncertain parameters and the unknown
state. First of all, an observer matching condition that can decouple uncertain parameters is proposed for managed pressure
drilling systems that contain uncertain parameters in the unknown state. Then, an adaptive observer is designed based on the
observer matching condition to estimate downhole parameters and state, and the asymptotic stability of the estimation error
is proved based on the Lyapunov stability theorem. Finally, the observer gain is obtained based on linear matrix inequality
(LMI) method to improve the robustness of the observer. Simulation analysis shows that compared with the existing adaptive
observer for managed pressure drilling system, the proposed observer has better convergence and robustness for the
estimation of downhole annular friction integral and bottom-hole flow. |
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