Hydraulic Impulse-Testing System with Pressure Difference Feedback from a Second-Stage Valve
Publication: Journal of Aerospace Engineering
Volume 28, Issue 6
Abstract
To guarantee the reliability of hydraulic systems, it is of vital importance to do impulse testing for hydraulic components. A hydraulic impulse-testing system with pressure difference feedback from a second-stage valve is studied. A mathematical model of the system is built, and it shows that the inner closed-loop damping ratio of the system is influenced by the pressure difference feedback of the control chambers of the second-stage valve. And by changing the pressure difference feedback gain, various damping ratios can be achieved, which is a key factor affecting the system overshoot. The results of both the simulation and experiment show that with the same square wave input the system overshoot can be freely controlled between 0 and 50% by adjusting the pressure difference feedback gain, which is a new method to obtain both peak wave impulse pressure cycle and square wave impulse pressure cycle utilizing the same system and the same input.
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Acknowledgments
The authors would like to thank the sponsor of the Science Fund for Creative Research Groups of National Natural Science Foundation of China (No. 51221004).
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Information & Authors
Information
Published In
Journal of Aerospace Engineering
Volume 28 • Issue 6 • November 2015
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Jul 11, 2014
Accepted: Jan 12, 2015
Published online: Feb 20, 2015
Discussion open until: Jul 20, 2015
Published in print: Nov 1, 2015
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