Dynamic characteristics of electrohydraulic servosystems exciting with square-like pressure wave

H. Chang; C. W. Lana; M. J. Kao; L. C. Chenc; H. Y. Yeh

doi:10.1117/12.716337

13 October 2006 Dynamic characteristics of electrohydraulic servosystems exciting with square-like pressure wave

H. Chang, C. W. Lana, M. J. Kao, L. C. Chenc, H. Y. Yeh

Proceedings Volume 6280, Third International Symposium on Precision Mechanical Measurements; 628034 (2006) https://doi.org/10.1117/12.716337
Event: Third International Symposium on Precision Mechanical Measurements, 2006, Urumqi, China

Abstract

This paper uses the square-like wave produced by square pressure wave generator to excite the electrohydraulic servosystem and simulate the aeroservoelasticity, so as to evaluate the dynamic characteristics of electrohydraulic servosystem after exciting by high frequency square-like pressure waves. Such a simple hydraulic testing system can replace the resource-consuming wind tunnel test of aeroservoelasticity. In the system, a PID-controller is employed to give electrohydraulic servovalve a command via AD/DA interface card in order to drive the actuator. In the meantime, the square-like pressure wave of the different pressures and frequencies produced by square pressure wave generator would forcefully excited the actuator. Then linear variable differential transformer is used to measure the displacement of the actuator, ultimately achieving the feedback signal and positioning of the actuator. The results show that the electrohydraulic servosystem system is unstable and uncontrollable when the external static pressure approaches the pressure of electrohydraulic servosystem. Raising the frequency of the exciting can reduce the amplitude of the actuator at positioning. However, as the frequency of exciting is at a certain particular region, the amplitude will achieve the maximum value. During this time, the positioning of the actuator which is controlled by electrohydraulic servosystem becomes unstable. Apart from developing a new testing method of the dynamic characteristics of electrohydraulic servosystem, this paper makes an in-depth dynamic analysis of electrohydraulic servosystem.

Citation Download Citation

H. Chang, C. W. Lana, M. J. Kao, L. C. Chenc, and H. Y. Yeh "Dynamic characteristics of electrohydraulic servosystems exciting with square-like pressure wave", Proc. SPIE 6280, Third International Symposium on Precision Mechanical Measurements, 628034 (13 October 2006); https://doi.org/10.1117/12.716337

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
6 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Servomechanisms

Actuators

Frequency converters

Amplifiers

Device simulation

Feedback signals

Signal generators

Show All Keywords

Keywords/Phrases

Search In:

Publication Years