A fundamental part of a digital fluid power (DFP) pump is the actively controlled valves, whereby successful application of these pumps entails a need for control methods. The focus of the current paper is on a flow control method for a DFP pump. The method separates the control task concerning timing of the valve activation and the task concerning the overall flow output control. This enables application of linear control theory in the design process of the DFP pump flow controller. The linearization method is presented in a general framework and an application with a DFP pump model exemplifies the use of the method. The implementation of a discrete time linear controller and comparisons between the nonlinear model and the discrete time linear approximation shows the applicability of the control method.
Discrete Linear Time Invariant Analysis of Digital Fluid Power Pump Flow Control
Contributed by the Dynamic Systems Division of ASME for publication in the JOURNAL OF DYNAMIC SYSTEMS, MEASUREMENT, AND CONTROL. Manuscript received January 4, 2016; final manuscript received March 30, 2017; published online June 28, 2017. Assoc. Editor: Kevin Fite.
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Johansen, P., Roemer, D. B., Andersen, T. O., and Pedersen, H. C. (June 28, 2017). "Discrete Linear Time Invariant Analysis of Digital Fluid Power Pump Flow Control." ASME. J. Dyn. Sys., Meas., Control. October 2017; 139(10): 101007. https://doi.org/10.1115/1.4036554
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