A servo control method of controlling a plant to track a reference
trajectory with enhanced accuracy using a reference signal and its
derivative signals, an apparatus and a recording medium suitable for
same. The servo control method includes: determining a polynomial
indicating a reference trajectory desired by a plant and derivatives of
the polynomial; sampling a plant output with respect to a plant input;
generating a reference signal and its derivative signals with reference
to a time between samples (a relative time); and determining a plant
input at a sampling time using the generated reference signal and its
derivative signals, a delayed plant input and a delayed plant output.
Accordingly, a plant is controlled to track a reference trajectory with
enhanced accuracy using a reference signal and its derivative signals.