2015 Volume 77 Issue 6 Pages 456-463
We developed a drive mechanism and control system to enable low-cost vehicle speed interlocking control for rice planting devices. A flat permanent magnet synchronous motor and pair of spur gears were installed between two rows of planting devices. The control system was implemented on two microcontrollers connected by CAN communication. Only Hall-effect and current sensors were used for motor control. The system showed a 0.2s tracking response for a 5.0Hz ramp input. Under constant velocity control, the system showed a good tracking response up to 7.5Hz. Non-constant velocity control assuming sparse planting was also possible; a speed ratio of up to 30% was realized at an average planting speed of 5.0Hz.
