… However, in the actual process of drilling, the motor speed oscillated significantly and could
… electric driven laboratory core drill rig, and to develop a supporting automatic drilling control …

… automatic tuning procedure and an estimator of key parameters of the drill-string system
used in deep drilling … based on speed control loop of the drilling electrical drive tuned for “stiff” …

… paper, such as auto-drilling, soft torque control, soft pump control, … the auto-drilling system
runs in less than 10Hz speed … and a three-phase AC asynchronous motor as the actuator. The …

… manually by an operator or automatically by a control system [5]. … When frequency control
of the speed of asynchronous … ratios of an asynchronous motor for frequency control, we use …

… the drill pressure has a linear relationship with the drill speed. That … automatic control scheme
designed in this paper is applicable for the newly developed frequency-variable oil drilling …

… the automated control system that allows automated leaving … ; the upper limit of the rotational
speed of the drilling rig, rpm: 120-… asynchronous engine model was implement machine’s …

… of the rotation speed of the mechanisms involved in … the squirrel-cage induction motor and
the principle of speed control. The … designed asynchronous motor is created for automatically …

… , the automatic control system sends two parallel control signals: the first to start the backup
diesel generator, which will be ready to receive the load after reaching the nominal speed (…

… to control a process or machine. Process control can be continuous variable adjustment, …
requires repetitive operation, which is common in drilling machines, conveyor systems, etc. …

… -phase asynchronous motor (x) drives the drill-pipe and drill-… frequency control of an
interconnected time-delayed power … degree in automation and the MS degree in control science …