This paper presents the design and implementation of a nonlinear feedforward control algorithm for a hydraulic actuator driven by a multistage servo valve. Combined with a conventional feedback control algorithm, high frequencies can be achieved even for large-scale strokes. In addition to the desired trajectory, the feedforward controller accepts the predicted dynamic load on the hydraulic actuator as an input. The performance of the control concept as well as the advantages of the load input are verified in simulations and experiments. Being exemplarily used for realizing a crankshaft-less test stand for free piston engines, the control algorithm is potentially suitable for further applications using hydraulic actuators in high frequency domain.
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March 2012
Research Papers
Flatness-Based High Frequency Control of a Hydraulic Actuator
Cornelius Ferrari
Cornelius Ferrari
e-mail:
German Aerospace Center (DLR), Institute of Vehicle Concepts (FK)
, Stuttgart D-70569, Germany
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Cornelius Ferrari
e-mail:
German Aerospace Center (DLR), Institute of Vehicle Concepts (FK)
, Stuttgart D-70569, Germany
J. Dyn. Sys., Meas., Control. Mar 2012, 134(2): 021003 (7 pages)
Published Online: December 29, 2011
Article history
Received:
September 7, 2010
Revised:
July 19, 2011
Online:
December 29, 2011
Published:
December 29, 2011
Citation
Kock, F., and Ferrari, C. (December 29, 2011). "Flatness-Based High Frequency Control of a Hydraulic Actuator." ASME. J. Dyn. Sys., Meas., Control. March 2012; 134(2): 021003. https://doi.org/10.1115/1.4005047
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