A Double Surfaces Sliding Mode Control Technique in Rotary Drilling System
In this paper,a conventional model describing the torsional behavior of a generic vertical oilwell drillstring has been presented,and a PI control based on sliding mode is proposed for robust stabilization of nonlinear rotary drilling system. The controller is combined of a PI controller to compensate the nonlinearity in the drilling machine and sliding mode controller to ensure the robustness of the method proposed. A double sliding mode surfaces control is applied in the control system. The control target is to give rise to bit stickslip oscillations and bit sticking phenomena,to accomplish the bit velocity to the rotary velocity and the rotary velocity approach to the reference. The simulation results show faster dynamics performance,and a strong potential for the practical applicability of this approach.
oilwell drillstring:sliding mode:oscillation:stickslip
Zhang Qi-zhi He Yu-yao Li Lin Rasol Nurzat
College of Marine,Northwestern Polytechnical University Xian,710065,China;Key Laboratory of Drillin College of Marine,Northwestern Polytechnical University Xian,710065,China Key Laboratory of Drilling Rigs Controlling Technique,Xian Shiyou University Xian,710065,China
国际会议
成都
英文
1618-1622
2010-04-16（万方平台首次上网日期，不代表论文的发表时间）