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http://dx.doi.org/10.7839/ksfc.2015.12.3.044

Study on Bandwidth Frequency of Servovalve based on Metering Cylinder  

Kim, S.D. (Department of Mechanical System Engineering, Kumoh National Institute of Technology)
An, Wen-Long (School of Construction Machinery, Chang'an university)
Jeon, S.H. (Department of Mechanical System Engineering, Kumoh National Institute of Technology)
Publication Information
Journal of Drive and Control / v.12, no.3, 2015 , pp. 44-51 More about this Journal
Abstract
In this study, a metering cylinder was constructed, and the velocity obtained from the linear velocity transducer (LVT) of the cylinder piston was used to evaluate the dynamic performance of an electro-hydraulic servovalve. Frequency response experiments involving the spool displacement and piston velocity (LVT signal) were conducted with different input signal amplitudes, hydraulic pipe diameters, and supply pressures. The spool displacement signal accurately reflected the performance of the servovalve. Meanwhile, the -3 dB bandwidth frequency of the LVT signal was similar to the spool displacement signal, except for a small-amplitude input signal, and the $-90^{\circ}$ phase lag bandwidth frequency showed some differences.
Keywords
Servovalve; Bandwidth Frequency; Spool Displacement; Linear Velocity Transducer;
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