The Study Of The Control Method For The Rotary Steerable Drilling System

In recent years,oil and gas exploitation become more and more difficult,therefore,the drilling technology have become increasingly demanding.Dynamic point rotary steerable drilling,on behalf of high-precision steering drilling technology,has a very obvious advantage in well trajectory and control accuracy.Based on dynamic point rotary steerable drilling model,research rotary steerable control system.Some exploratory work was finished:1.Comprehensive review rotary steerable drilling technology control system,research how guide mechanism works,and lay the foundation for a permanent magnet synchronous motor control.2.Describes the characteristics of permanent magnet synchronous motors,analysis method for controlling PMSM,establish space vector model of PMSM.3.Learn model reference adaptive control theory,use Lyapunov stability theory and Popov stability theory,seek two methods of controlling PMSM precisely.For the stator resistance varies with temperature frequency and other factors,design a new control strategy to eliminate the impact of the stator resistance variation.4.Above PMSM model,simulate in matlab,and analysis the results.