서보밸브-미터링 실린더 시스템의 오일 관성효과와 주파수 응답 특성에 관한 연구A Study on the Oil Inertia Effect and Frequency Response Characteristics of a Servo Valve-Metering Cylinder System
- Other Titles
- A Study on the Oil Inertia Effect and Frequency Response Characteristics of a Servo Valve-Metering Cylinder System
- Authors
- 윤홍식; 김성동
- Issue Date
- Feb-2021
- Publisher
- 사단법인 유공압건설기계학회
- Keywords
- 서보밸브; 미터링 실린더; 오일 관성 효과; 주파수 응답; 유압 고유주파수; Servo Valve; Metering Cylinder; Oil Inertia Effect; Frequency Response; Hydraulic Natural Frequency
- Citation
- 드라이브·컨트롤, v.18, no.2, pp.9 - 19
- Journal Title
- 드라이브·컨트롤
- Volume
- 18
- Number
- 2
- Start Page
- 9
- End Page
- 19
- URI
- https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/19327
- ISSN
- 2671-7972
- Abstract
- The spool displacement signal of a directional control valve, including the servo valve, can be considered as the standard signal to measure dynamic characteristics. When the spool displacement signal is not available, the velocity signal of a metering cylinder piston can be used. In this study, the frequency response characteristics of the metering cylinder are investigated for the spool displacement input. The transfer functions of the servo valve-metering system are derived taking into consideration the oil inertia effect in the transmission lines. The theoretical results of the transfer functions are verified through computer simulations and experiments. The oil inertia effect in the transmission lines was found to have a very significant effect on the bandwidth frequency of the servo valve-metering cylinder system. In order to more precisely measure the dynamic characteristics of a servo valve, the metering cylinder should be set up to minimize the oil inertia effect by increasing the inner diameters of the transmission lines or shortening their lengths.
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