This paper deals with suppression of two kinds of micro stick-slip vibrations occurring in a typical computer-controlled hydraulic servo-system. The relevant system consists of a single-rod hydraulic cylinder, an electrohydraulic servo-valve and a personal computer. The discontinuous control signal from a converter causes a stick-slip vibration of micron order of magnitude over a wide range of the feedback gain. Increasing the feedback gain results in the other stick-slip vibration of nearly ten times larger amplitude due to the nonlinear pressure-flow characteristic of the servo-valve. The numerical simulation revealed the latter micro stick-slip vibration could be efficiently suppressed with the feedback linearization technique to compensate the nonlinearity of the servo-valve, while the former one reduced by improving the resolution of the converter. Validities of both the methods were also confirmed with experiment. [S0022-0434(00)00102-7]
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June 2000
Technical Papers
Suppression of Micro Stick-Slip Vibrations in Hydraulic Servo-System
Toshiyuki Hayase, Associate Professor,
Toshiyuki Hayase, Associate Professor
Institute of Fluid Science, Tohoku University, Sendai, 980-8577, Japan
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Satoru Hayashi, Professor, Mem. ASME,
Satoru Hayashi, Professor, Mem. ASME
Institute of Fluid Science, Tohoku University, Sendai, 980-8577, Japan
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Kazunori Kojima, Graduate Student,
Kazunori Kojima, Graduate Student
Institute of Fluid Science, Tohoku University, Sendai, 980-8577, Japan
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Ikuro Iimura, Research Associate
Ikuro Iimura, Research Associate
Institute of Fluid Science, Tohoku University, Sendai, 980-8577, Japan
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Toshiyuki Hayase, Associate Professor
Institute of Fluid Science, Tohoku University, Sendai, 980-8577, Japan
Satoru Hayashi, Professor, Mem. ASME
Institute of Fluid Science, Tohoku University, Sendai, 980-8577, Japan
Kazunori Kojima, Graduate Student
Institute of Fluid Science, Tohoku University, Sendai, 980-8577, Japan
Ikuro Iimura, Research Associate
Institute of Fluid Science, Tohoku University, Sendai, 980-8577, Japan
Contributed by the Dynamic Systems and Control Division for publication in the JOURNAL OF DYNAMIC SYSTEMS, MEASUREMENT, AND CONTROL. Manuscript received by the Dynamic Systems and Control Division March 3, 1998. Associate Technical Editor: R. Chandran.
J. Dyn. Sys., Meas., Control. Jun 2000, 122(2): 249-256 (8 pages)
Published Online: March 3, 1998
Article history
Received:
March 3, 1998
Citation
Hayase, T., Hayashi, S., Kojima, K., and Iimura, I. (March 3, 1998). "Suppression of Micro Stick-Slip Vibrations in Hydraulic Servo-System ." ASME. J. Dyn. Sys., Meas., Control. June 2000; 122(2): 249–256. https://doi.org/10.1115/1.482450
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