摘要
固井水泥浆混浆系统具有非线性、时变性和大滞后特性,使得传统控制方法难以实现自动化固井装置的稳定和精确控制。为此,提出一种基于Smith预估补偿和模糊PID解耦控制的先进策略。通过对固井水泥浆混浆系统进行数学建模和耦合性分析,采用前馈补偿器预先对系统中可能出现的扰动进行补偿,有效降低耦合效应。继而设计了Smith-模糊PID解耦控制器,通过模糊逻辑调整PID参数,以适应系统的非线性和时变性特点,从而实现对密度的精确控制。利用MATLAB/Simulink平台进行仿真试验和抗干扰能力分析。研究结果表明:相较于Smith预估补偿和模糊PID控制,提出的Smith-模糊PID解耦控制算法在动态性能、稳态性能以及抗干扰能力方面具有显著优势,同时具有较强的鲁棒性。该控制策略能够有效减少超调量,加快系统调节速度,并提高系统稳定性,可为固井水泥浆密度精确控制提供一种有效的解决方案,对固井水泥浆混浆系统的智能化发展具有一定的理论指导作用。
The cement slurry mixing system has the characteristics of nonlinearity,time variation and long time-delay,which make it impossible to achieve stable and accurate control of automatic cementing devices by traditional techniques.This paper presents an advanced strategy of control based on Smith predictive compensation and fuzzy PID decoupling(Smith-fuzzy PID decoupling).Firstly,through the mathematical modeling and coupling analysis of the cement slurry mixing system,the feedforward compensator was used to compensate for the possible disturbances in the system in advance,which effectively reduces the coupling effect.Then,the Smithfuzzy PID decoupling controller was designed,and the PID parameters were adjusted through fuzzy logic to adapt to the nonlinear and time-varying characteristics of the system,so as to achieve accurate control of density.Finally,simulation experiments and anti-interference analysis were carried out on the Matlab/Simulink platform.The results show that compared with Smith predictive compensation and fuzzy PID control,the proposed control based on Smith-fuzzy PID decoupling is significantly superior in dynamic performance,steady-state performance and anti-interference ability,and has a strong robustness.This control strategy can effectively reduce the overshoot,speed up the system adjustment,and improve the system stability.It provides a reliable solution to the accurate control of cement slurry density,and will play a theoretical guiding role in the intelligent development of cement slurry mixing system.
作者
李勇
樊恒
冀宇
程思达
蒙健升
Li Yong;Fan Heng;Ji Yu;Cheng Sida;Meng Jiansheng(CNPC Engineering Technology R&D Company Limited;College of Electronic Engineering,Xi’an Shiyou University)
出处
《石油机械》
北大核心
2025年第7期32-41,共10页
China Petroleum Machinery
基金
中国石油天然气集团有限公司基础前瞻重大科技专项“智能钻完井控制理论与关键模型研究”课题之“固井作业智能调控与大数据分析技术”(2023ZZ0604)。
作者简介
第一作者:李勇,高级工程师,生于1984年,2020年毕业于中国石油勘探开发研究院油气井工程专业,获博士学位,现从事固井工艺技术、智能化固井研究工作。地址:(102206)北京市昌平区。电话:(010)80162257。email:liyongdri@cnpc.com.cn;通信作者:程思达,工程师。email:chengsddr@cnpc.com.cn。
