Modeling and Experimental Validation of the Time Delay in a Pilot Operated Proportional Directional Valve | Zendy

Junhui Zhang | Zendy; Di Wang | Zendy; Bing Xu | Zendy; Zhenyu Lu | Zendy; Minyao Gan | Zendy; Qi Su | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Open Access

Modeling and Experimental Validation of the Time Delay in a Pilot Operated Proportional Directional Valve

Author(s) -

Junhui Zhang,

Di Wang,

Bing Xu,

Zhenyu Lu,

Minyao Gan,

Qi Su

Publication year - 2018

Publication title -

ieee access

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.587

H-Index - 127

ISSN - 2169-3536

DOI - 10.1109/access.2018.2844164

Subject(s) - aerospace , bioengineering , communication, networking and broadcast technologies , components, circuits, devices and systems , computing and processing , engineered materials, dielectrics and plasmas , engineering profession , fields, waves and electromagnetics , general topics for engineers , geoscience , nuclear engineering , photonics and electrooptics , power, energy and industry applications , robotics and control systems , signal processing and analysis , transportation

The pilot-operated proportional directional valve is a crucial component in the airplane landing gear retraction system. The time delay of the proportional valve directly affects the retraction behavior even the flight safety and needs to be analyzed. Therefore, the modeling and analysis of a typical pilot-operated proportional directional valve are presented in this paper. Substantially, the nonlinear valve system is composed of four subsystems: mechanical, electronic, electromagnetic, and fluid dynamic subsystems. The subsystems are modeled based on a lumped parameter approach. The coupling among the subsystems is analyzed. The nonlinearity is implemented using a specific set of equations in the model. Especially, the nonlinearity observed in practical application is considered in modeling the effect of the electronic anti-unloading power drive circuit on the pulse-width modulation signal. The analytical results of the model show good agreement with the experimental ones. The investigation shows that the delay of the valve results from multiple subsystems' dynamic performances which act sequentially on the main spool. The effect of the electronic part and the structural part is analyzed, and the proportion of each part is given based on the simulation results. The analysis shows that the model can provide a direct suggestion in choosing the valve part to optimize and the optimization effect limit.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research