Computer-based optimal control of seeding rate based on travel speed and seed signals(part 2)-laboratory test of proportional + integral (PI) control algorithm

摘要

This paper describes the method to control seeding rate proportional to the changes of the traveling speed using computer control system. The control algorithm is based on Proportional + Integral control method and the result of the laboratorytest shows that the control system did respond immediately (about 1 second) after the traveling speed was changed from low to high or high to low however, the time required for the actual metering roll speed to be stabilized was about 3 to 4 seconds whenthe traveling speed changes from low to high and about 2 seconds when traveling speed changes from high to low. The desired metering roll speed was achieved within a reasonable number of sampling of the control program.