TY - SER AU - Karkoub,M. AU - Abdel-Magid,Y.L. AU - Balachandran,B. TI - Drill-string torsional vibration suppression using GA optimized controllers PY - 2009/// CY - PB - N2 - Transcripción del resumen del autor. Failure of drill-strings is very costly in terms of money and time and occurs more frequently than oil companies would like to see. There are many reasons for drill-string failure, such as vibration, fatigue, and buckling. This paper addresses the problem of suppression of stick-slip oscillations in oil well drill-strings using proportional integral derivative (PID) and lead-lag controllers in conjunction with genetic algorithms. Simulation results are presented to validate the proposed control schemes ER -