Development of a Microprocessor-Based Steering Controller for an Over-the-Row Apple Harvester

810940

09/01/1981

Event
1981 SAE International Off-Highway and Powerplant Congress and Exposition
Authors Abstract
Content
In order to provide a machine with a better maneuverability, a microprocessor-based steering controller was designed and developed for an over-the-row apple harvester. The controller allowed the machine operator to select any one of the five steering modes which were: (1) auto-steer, (2) front only, (3) four way, (4) crab, and (5) rear only. Upon recognizing the selected steering mode, the controller executed the appropriate algorithm which performed the necessary wheel position control. As a part of the controller, absolute shaft encoders were designed. The encoders were used to sense the position of the wheels and the tree sensor arms. In each steering mode except auto-steer, the tracking ability of the rear wheels was determined. For the auto-steer mode, the ability of the apple harvester to reamin centered over a tree row while moving over the row was evaluated.
Meta TagsDetails
DOI
https://doi.org/10.4271/810940
Pages
11
Citation
Upchurch, B., Tennes, B., and Surbrook, T., "Development of a Microprocessor-Based Steering Controller for an Over-the-Row Apple Harvester," SAE Technical Paper 810940, 1981, https://doi.org/10.4271/810940.
Additional Details
Publisher
Published
Sep 1, 1981
Product Code
810940
Content Type
Technical Paper
Language
English