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http://dx.doi.org/10.20910/JASE.2017.11.3.8

Pressure Control of Brake Circuit with Piezoelectric-hydraulic Pump Using Pressurization/Depressurization Characteristics  

Hwang, Yong-Ha (Department of Aerospace and Mechanical Engineering, Korea Aerospace University)
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, Agency for Defense Development)
Publication Information
Journal of Aerospace System Engineering / v.11, no.3, 2017 , pp. 8-15 More about this Journal
Abstract
In this paper, an equivalent brake hydraulic circuit with a piezoelectric hydraulic pump was constructed, and load pressure control for better pressurization/depressurization characteristics was conducted. To understand pressurization/depressurization characteristics of the equivalent hydraulic circuit, the relation between the load pressure and the input voltage was revealed experimentally. Experiments were also conducted to observe effect of the solenoid valve on depressurization characteristics. In the pressurization experiment, it was validated that transient response time required to achieve desired load pressure may be reduced through voltage control to change pressurization gradient. By applying the valve on/off time control and voltage control, it was also possible to reduce response time in the depressurization process. Therefore, transient response time may be improved within 10ms for pressurization and within 30 ms for depressurization using the control technique suggested in this study. The load pressure control method proposed in this study is useful for controlling load pressure of a hydraulic brake system with the piezoelectric hydraulic pump.
Keywords
Pressurization; Depressurization; Voltage control; Valve on/off control;
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Times Cited By KSCI : 4  (Citation Analysis)
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