Positioning control of hydraulic press by a variable speed motor
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Proceedings of Bath Workshop on Power Transmission and Motion Control (PTMC 2002), Bath, United Kingdom, September 11-13, 2002
For a hydraulic press controlled by the rotational speed of the pump, a positioning controller is developed. The controller has to meet various requirements concerning accuracy, robustness, and rise time. This results in a state controller adapting to position in a pressure-dependent way. Controller performance is investigated by simulation and experiments. The influence of pump pulsations is shown to be very small, whereas the implementation of a motor speed feedback makes a big difference.