Open Access
Table 1
Relevant parameters of electrohydraulic servo system of a certain type of CNC machine tool.
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Pressure source of the system ps/Pa | 7 × 106 | Oil bulk modulus βe/Pa | 2 × 108 |
| Return oil pressure of the system pr/Pa | 0 | Load mass m / kg | 180 |
| Viscous friction coefficient B / (N·s/m) | 80 | Current gain of servo valve ki / (m/V) | 4 × 10−8 |
| Initial volume of left cavity V01/m3 | 1 × 10−3 | Internal leakage coefficient Cτ/ (m5/(N·s)) | 7 × 10−12 |
| Initial volume of right cavity V02/m3 | 1 × 10−3 | Discharge coefficient Cd | 0.6 |
| Effective area of two cavities A / m2 | 2 × 10−4 | Orifice area gradient ω/m | 0.025 |
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