Title: A hydraulic system based on the servo valve with dual input of machine and electricity

Authors: Hao Yan; Bowen Jiang; Zheqing Zuo

Addresses: School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing, 100044, China; Key Laboratory of Vehicle Advanced Manufacturing, Measuring and Control Technology, Beijing Jiaotong University, Ministry of Education, Beijing 100044, China ' School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing, 100044, China ' The 18th Institute of China Academy of Launch Vehicle Technology, Beijing, 100076, China

Abstract: The hydraulic system based on the servo valve with dual input of machine and electricity consists of the valve control system and the mechanical feedback device, which has a higher reliability. When the power of the system is cut off, the system can continue working until the actuator returns to the original position. This system is widely used in some situations with higher reliability requirements. In this paper, the mathematical model of the system is established, where a certain transmission ratio between the actuator and the mechanical feedback is considered. Meanwhile, the key system parameters are analysed in order to reflect their influences on the system performance. It is obtained that the uncertainties of key parameters of the hydraulic amplifier have a certain impact on the dynamic and static characteristics of the system.

Keywords: servo valve; dual input; mechanical feedback; dynamic and static characteristics; error analysis.

DOI: 10.1504/IJMIC.2020.111623

International Journal of Modelling, Identification and Control, 2020 Vol.34 No.3, pp.187 - 196

Received: 14 Dec 2019
Accepted: 12 Feb 2020

Published online: 30 Nov 2020 *

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