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http://dx.doi.org/10.5139/JKSAS.2015.43.11.963

On the Pressurization Characteristics of Small Piezoelectric Hydraulic Pump for Brake System  

Jeong, Min-Ji (Department of Aerospace and Mechanical Engineering, Graduate School at KAU)
Hwang, Jai-Hyuk (Department of Aerospace and Mechanical Engineering, Korea Aerospace University)
Bae, Jae-Sung (Department of Aerospace and Mechanical Engineering, Korea Aerospace University)
Kwon, Jun-Yong (The 7th Research and Development Institute, ADD)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.43, no.11, 2015 , pp. 963-970 More about this Journal
Abstract
In this study, the pressurization characteristics of the small piezoelectric hydraulic pump for a brake system has been analyzed through modeling the full hydraulic pump components; the pump chamber, check valve, pump load, pump drive controller etc. To analyze the pressurization characteristics, the process of charging pressure in the chamber with stacked-layer piezoelectric actuator were firstly modeled. Secondly, the flow coefficient of the check valve in terms of valve opening has been calculated after computational fluid dynamics analysis, such as the pressure distribution around check valve and the flow rate, was conducted. Also the pump driving controller, which controls the input voltage to the actuator, was designed to make the load pressure follow the input pressure command. The simulation results find that it takes about 0.03ms to reach the operating load pressure required for the braking system. The simulation result was also verified through comparison to the result of the pump performance test.
Keywords
Piezoelectric-Hydraulic Pump; Piezoelectric Actuator; Check Valve; UAV Brake System;
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Times Cited By KSCI : 2  (Citation Analysis)
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