Abstract
Mining machinery in loading and digging tasks requires well-trained operators. The nature of the loading task is repetitive, yet tedious due to changing digging and loading points, material weight, grade and digging resistance. There exists an optimum digging and loading kinematics, i.e. the family of motion trajectories for each task in which the control of the bucket tool is the easiest to execute. A given mining machine may not match this most convenient kinematics for a given job and working conditions. To help, a new, software-controlled virtual kinematics is developed to assist the operator and ease the task as well as increase energy efficiency and save cost. The paper describes this new technique and its implementation on an experimental excavator, as well as laboratory and benchmarking results. The potential benefits of the new hybrid machine control are discussed regarding reduced loading cycle time, fuel savings and ease of operation.
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