This paper identifies several practical solutions for removing oscillations from open circuit hydraulic systems. In practice, it is common to test concepts to remove oscillations. These tests often have very little chance of success due to the fact that modeling and predicting open circuit system oscillations and instability is difficult. Because modeling is assumed to be too difficult, the engineer or technician typically uses concepts and methods based on experience. This past experience is often with similar systems, but a lack of understanding means that key differences are overlooked. This paper highlights several practical approaches to addressing oscillations. It shares past experiences and describes the applicability of these solutions to different systems. These approaches are more sophisticated than trial and error, but are easier to comprehend than detailed controls theory, and root locus analysis.
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