The frequency of the sine wave starts at F1 Hz and then changes linearly from F1 to F2 Hz. After reaching F2 Hz, the frequency is then changed linearly again until it reaches a final frequency of F3 Hz. The user specifies the three control frequencies F1 to F3 and also the sweep periods during which the frequency is ramped from one control frequency to the next. It then decreases linearly from 1.0 Hz to 0.5 Hz over the next 30 seconds.
Alpha is a scaling constant specified by the user.
It is limited to a maximum value of 1.0. Note that drive signal clipping may occur if Alpha is set too close to 1.0 because extra stroke is usually required to compensate for the servo dynamics of the wave machine. The second set of output files contains the corresponding drive signals for each segment of the wave machine. These drive signals produce a unidirectional wave with a propagation angle of zero degrees. Even though all segments have the same motion, a different drive signal is required for each segment in order to compensate for the servo dynamics of each individual segment.