Modelling and fault tolerance analysis of triplex redundancy servo valve Online publication date: Tue, 11-Dec-2018
by Hao Yan; Lei Yao; Li-bo Qiu; Bo Chen; Lijing Dong
International Journal of Modelling, Identification and Control (IJMIC), Vol. 31, No. 1, 2019
Abstract: To investigate the stability and reliability of the triplex redundancy servo valve, a complete theoretical model needs to be built. By constructing the mathematical models of the torque motor, the armature-flapper assembly and the spool valve, the theoretical model of the triplex redundancy servo valve is deduced and the dynamic simulation method is obtained. Then, its dynamic and static characteristics are simulated and analysed by Simulink and AMEsim, respectively. The triplex redundancy servo valve may often suffer from two faults, the signal's broken circuit and full bias. Simulations show that the faults will lead to the decrease of the valve's working capability, the deviation of the valve's output, and the decline of the dynamic performance. However, the valve can still work stably and the output of the hydraulic system will not be much affected, which show the valve's favourable fault tolerance capability. Finally, the validity of the theoretical model for fault analysis is verified by an experiment.
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Modelling, Identification and Control (IJMIC):
Login with your Inderscience username and password:
Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.
If you still need assistance, please email subs@inderscience.com
Our Blog 
Follow us on Twitter 
Visit us on Facebook