Control of bulk modulus of oil in hydraulic systems

Author

Wang, Jing ; Gong, Guofang ; Yang, Huayong

Author_Institution

State Key Lab. of Fluid Power Transm. & Control, Zhejiang Univ., Hangzhou

fYear

2008

fDate

2-5 July 2008

Firstpage

1390

Lastpage

1395

Abstract

In view of requirements for better position accuracy, response time and stability of hydraulic system, it is more important than ever to pay attention to bulk modulus of hydraulic oil. In this paper, the effects of the bulk modulus of hydraulic oil on system performance and the entrapped air on bulk modulus have been analyzed. A method of online vacuum degassing in a sealed system has been used to increase the effective bulk modulus of hydraulic oil, and a device has been developed to measure oil bulk modulus online. The experimental results show that the bulk modulus of hydraulic oil can be controlled in real system effectively by the method mentioned above.

Keywords

elastic moduli; hydraulic systems; oils; position control; stability; bulk modulus; hydraulic oil; hydraulic system; online vacuum degassing; position accuracy; response time; stability; system performance; Analytical models; Control systems; Delay; Frequency; Hydraulic systems; Petroleum; Pistons; Stability; Vacuum systems; Valves; Bulk modulus of hydraulic oil; Hydraulic system; Online measurement; Vacuum degassing;

fLanguage

English

Publisher

ieee

Conference_Titel

Advanced Intelligent Mechatronics, 2008. AIM 2008. IEEE/ASME International Conference on

Conference_Location

Xian

Print_ISBN

978-1-4244-2494-8

Electronic_ISBN

978-1-4244-2495-5

Type

conf

DOI

10.1109/AIM.2008.4601865

Filename

4601865