Automatic Control for Vibratory Tillage (III)

Computer Controlled Vibratory Tillage

Abstract

A computer controlled automatic vibratory tillage test equipment which attains the minimum draft and power has been developed. Three modes of the control program were made and tested with this equipment. A computer simulation to investigate the control performances of the above modes was carried out. The main results are summarized as follows.
1) All of the three control modes converged to the same steady state when the velocity ratio was kept constant.
2) The control mode in which the blade frequency was the twice of the shearing frequency (frequency control mode) showed the optimum control with the minimum draft and power. The velocity of the convergence was also the greatest of the three.
3) From the results of the simulations the frequency control mode achieved the best control performance. The fluctuations of the draft reduction ratio was less than 10% under various cutting depth and soil moisture.