Resonant load control methods for industrial servo drives

A New Actuation Approach for Human Friendly Robot Design

“…In addition to mechanical modifications and control signal filtering (Ellis and Lorenz 2000), a somewhat surprising method to deal with the low-frequency oscillations associated with low impedance actuation is to change the control topology from collocated to non-collocated control. We can understand this by examining the open-loop transfer function of a simple mass-spring model of an actuator link system which employs non-collocated control.…”

Dynamic modeling and control of doubly fed induction generators driven by wind turbines

“…PI controllers are normally designed to control the lumped-mass system. The bi-quadratic function causes instability by altering the phase and gain of the lumped-mass system [15]. On most practical machines, the damping coefficient, D tg , is small so that both the numerator and denominator of the biquadratic function exhibit lightly damped torsional oscillation modes, if no specifically designed damping control is present in the WTG control system.…”

On Numerical Simulation Approach for Multiple Resonance Modes in Servo Systems

“…From the control point, the low-pass or notch filter is often used to reduce the influence of resonance in the system [9][10][11][12]. Other theories and approaches such as resonance ratio control [13] and acceleration feedback [14] have been put forward to decrease the influence of resonance mode [15,16]. The simulation of closed-loop is requisite when analyzing the influence of the resonance modes in servo system.…”