Abstract
Mathematical models for predicting the draft and power requirements of an oscillating soil-working tool executing ‘simple harmonic’, ‘quick-return’ or ‘quick-cutting’ motions were developed. An experimental soil-working tool was built to execute the three types of oscillating motion. An extended octagonal ring transducer was designed to sense the horizontal and vertical components of the force on the tool when it was working in a soil medium. The oscillating velocity of the tool was sensed by using a linear voltage differential transformer. The tool was tested in a soil bin containing artificial soil, and the draft, the vertical force on the tool and its velocity were measured. The experimental values of draft and power requirements were compared with the predicted values.
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