Open circuit displacement control in a 300 t mining excavator
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Hydraulic systems of large scale, as can be found in mining excavators, have typically been based on simplicity and durability. Typical architectures are open-centre hydraulic systems, which were designed with robustness and productivity in mind; however, they lack competiveness with other hydraulic systems in terms of energy efficiency. Displacement control has shown a promising potential especially in multi-actuator machines such as excavators. At the Technische Universität Dresden, an open-loop displacement control system was compared with today’s valve-controlled drive system in a mining excavator.
This research was funded by the German Federal Ministry of Education and Research within the research framework for the Forschung für die Produktion von morgen and was managed by the project sponsor Karlsruhe (PTKA). The authors would like to thank for their support.
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