This report treats micro stick-slip vibrations occurring in a typical computer-controlled hydraulic servo system. The relevant system consists of a hydraulic cylinder, a servo valve and a personal computer. First, an experiment was performed for a conventional feedback control system to confirm the occurrence of two different types of stick-slip vibration of small amplitude. Detailed numerical analysis was then performed to identify the main factors contributing to the vibrations. The control signal generated by the D/A converter causes micro stick-slip vibration of small amplitude over a wide range of control feedback gain. Increasing the feedback gain results in another type of micro stick-slip vibration of large amplitude due to the locally increased flow gain within the underlap of the servo valve. Computational results agree well with the experimental ones.
|Number of pages||7|
|Journal||Nippon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C|
|Publication status||Published - 1997|
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Industrial and Manufacturing Engineering