基于旋转导向系统的定向钻孔二维轨迹固定时间跟踪控制
陆承达 , 高晓瑜 , 李金宇 , 魏宏超 , 李旺年 , 吴敏
地球科学 ›› 2026, Vol. 51 ›› Issue (8) : 3027 -3036.
基于旋转导向系统的定向钻孔二维轨迹固定时间跟踪控制
Fixed⁃Time Tracking Control of Two⁃Dimensional Trajectories for Directional Boreholes Based on Rotary Steerable System
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旋转导向技术凭借造斜可控、成孔质量高和复杂地层适应性强的优势,已在煤矿、工程地质和油气勘探等复杂环境中得到应用. 聚焦于上述领域中的工作面超前探查与地质异常体识别等任务,针对倾角调控响应滞后导致的靶点偏移与轨迹偏差累积问题,提出一种面向旋转导向系统的定向钻孔二维轨迹固定时间跟踪控制方法. 首先,在描述钻孔延伸的时滞微分方程基础上,建立定向钻孔轨迹模型的状态空间表达式. 然后,设计含幂次反馈项的非线性控制器,实现轨迹误差的快速收敛. 并进一步构造李雅普诺夫函数,推导收敛时间上界,证明闭环系统具备固定时间收敛特性. 最后,通过仿真实验证明了所提方法具有收敛速度快、轨迹控制精度高及鲁棒性强等特点,在提升勘探效率以及降低作业风险等方面具有良好的应用价值.
Rotary steering technology, with the advantages of controllable inclination building, high borehole quality, and strong adaptability to complex formations, has been applied in complex environments such as coal mines, engineering geology, and oil⁃gas exploration. This paper focuses on tasks like advanced working face exploration and geological anomaly identification in the aforementioned fields. To address the issues of target point deviation and trajectory deviation accumulation caused by the lag in inclination adjustment response, a fixed⁃time tracking control method for the two⁃dimensional trajectory of directional drilling holes oriented to rotary steering systems is proposed. Firstly, based on the time⁃delay differential equation describing borehole extension, a state⁃space representation of the directional drilling trajectory model is established. Then, a nonlinear controller with a power feedback term is designed to achieve rapid convergence of trajectory errors. Furthermore, a Lyapunov function is constructed to derive the upper bound of the convergence time, proving that the closed⁃loop system has fixed⁃time convergence characteristics. Finally, simulation experiments demonstrate that the proposed method features fast convergence speed, high trajectory control accuracy, and strong robustness, and has good application value in enhancing exploration efficiency and reducing operational risks.
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国家自然科学基金项目(62373332)
国家自然科学基金项目(62273317)
高等学校学科创新引智计划111项目(B17040)
中国地质大学(武汉)中央高校基本科研业务费专项资金项目
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